Degradable magnesium metal closure clip

Abstract

The application discloses a degradable magnesium metal closure clamp and relates to the technical field of closure clamps. The degradable magnesium metal closure clamp comprises a first clamp arm, a second clamp arm and an elastic connecting piece, the first clamp arm is connected with the second clamp arm through the elastic connecting piece, and the first clamp arm and the second clamp arm are both configured as arc-shaped arms. The elastic connecting piece comprises a limiting protrusion and a groove for accommodating the limiting protrusion, the limiting protrusion and the groove are located on the side of the elastic connecting piece facing the space enclosed by the first clamp arm and the second clamp arm, and when the first clamp arm and the second clamp arm are closed, the limiting protrusion is at least partially pressed against the wall surface of the groove to limit the over-closing of the first clamp arm and the second clamp arm and disperse the stress at the elastic connecting piece. The application can prevent tail breakage as much as possible, the locking protrusion can be conveniently clamped into the locking groove to complete the connection and locking of the first clamp arm and the second clamp arm, and when the first clamp arm and the second clamp arm are closed, clear closing tactile feedback can be provided and a prompt sound can be emitted.

Description

Technical Field

[0001] This application relates to the technical field of closure clips, and in particular to a biodegradable magnesium metal closure clip. Background Technology

[0002] With the widespread adoption of minimally invasive surgical procedures such as laparoscopy, thoracoscopic surgery, and endoscopy, vascular closure clips have become core instruments for intraoperative hemostasis, tissue ligation, and duct closure. Clinically, closure clips are required to provide stable clamping, reliable locking, excellent biocompatibility, and also meet key performance requirements such as safe in-vivo placement, clear closure feel, anti-slip properties, no tissue damage, and suitability for minimally invasive procedures with limited field of vision.

[0003] Currently, closure clips used in clinical practice are mainly divided into two categories: non-degradable metal closure clips and degradable closure clips. With the development of materials science and clinical needs, medical degradable metal materials, represented by magnesium metal, are gradually becoming the research direction for the next generation of closure clips.

[0004] Existing magnesium metal closure clips mostly adopt the traditional hinged split structure or straight-arm integrated unsupported structure of polymer clips or non-degradable metal clips. Specifically, existing closure clips generally include an upper arm and a lower arm, both of which are straight arms and each is an integrated structure. The upper arm and the lower arm are connected by a connecting structure, which is a hinged structure or an integrated elastic structure at the tail end.

[0005] The above-mentioned solutions still have significant defects in structural design and mechanical adaptability. First, when the connecting structure is an elastic structure, the upper arm and lower arm usually meet directly at the tail to form an arc transition zone. The bending stress and shear stress generated during the closure process are highly concentrated at the weakest section of the tail arc, resulting in significant stress concentration at the tail. There is no effective stress dispersion mechanism, making the tail prone to breakage. Second, because the existing magnesium alloy closure clamp does not have a closure stroke limiting structure, when the doctor operates the upper and lower arms to clamp, the upper and lower arms are very prone to over-closure. The doctor's operating force is difficult to control precisely, causing the tail arc to bend to an angle exceeding the material's yield limit, resulting in irreversible plastic deformation and directly leading to tail breakage. At the same time, over-closure can also cause excessive compression of blood vessels, leading to serious complications such as ischemic necrosis of the blood vessel wall and anastomotic leakage. Third, integrated elastic structures are mostly hollow circular arc structures. When closed, they rely solely on the arc itself to bear the bending moment, without internal support components to assist in stress distribution. Stress cannot be transferred or distributed, and is entirely borne by a single point on the tail arc. When clamping coarser or bundled structures, the clamping force further increases, the stress on the tail rises sharply, and the risk of fracture increases significantly. Fourth, straight-arm magnesium metal closing clamps rotate rigidly when closed. The upper and lower arms cannot form a smooth fan-shaped displacement, resulting in disordered force direction and a sudden increase in local load on the tail arc. This not only reduces the locking alignment accuracy but also exacerbates stress concentration at the tail, increasing the probability of fracture. Fifth, if the tail is a hinged structure, it needs to be fitted with pins, clips, and other components. Gaps and stress singularities exist at the assembly interface. During degradation, the assembly parts are prone to preferential corrosion and loosening, ultimately leading to the overall fracture of the tail. Summary of the Invention

[0006] In order to minimize the risk of tail breakage, this application provides a biodegradable magnesium metal closure clip.

[0007] The biodegradable magnesium metal closure clip provided in this application adopts the following technical solution: A biodegradable magnesium metal closure clip includes a first clamping arm, a second clamping arm, and an elastic connector. The first clamping arm is connected to the second clamping arm through the elastic connector. Both the first and second clamping arms are constructed as arc-shaped arms. The elastic connector is constructed to enable the first and second clamping arms to open and close with the elastic connector as a fulcrum. The elastic connector includes a connecting arc plate, a limiting protrusion, and a groove for accommodating the limiting protrusion. The two ends of the connecting arc plate are respectively connected to the first clamping arm and the second clamping arm. The limiting protrusion and the groove are formed on the side of the connecting arc plate facing the space enclosed by the first clamping arm and the second clamping arm. When the first clamping arm and the second clamping arm are closed, the limiting protrusion at least partially presses against the wall of the groove to limit the first clamping arm and the second clamping arm from closing too far and to disperse the stress at the elastic connector.

[0008] By adopting the above technical solution, the arc-shaped arm replaces the traditional straight arm, enabling a smooth fan-shaped displacement when the first and second clamping arms close, thus avoiding disordered force direction of the elastic connector. The limiting protrusion on the inner side of the elastic connector cooperates with the groove, which on the one hand can accurately limit the maximum closing stroke of the closing clamp, preventing plastic deformation and fracture of the connecting arc plate (i.e., the tail end of this application) caused by excessive closure, and at the same time avoiding tissue damage caused by excessive compression of blood vessels; on the other hand, when the limiting protrusion presses against the wall of the groove, it forms an internal support structure, dispersing the stress originally concentrated at a single point on the connecting arc plate to the contact area between the limiting protrusion and the groove, greatly reducing the stress concentration of the elastic connector and significantly improving the fracture resistance of the closing clamp.

[0009] Preferably, the limiting protrusion extends along the thickness direction of the first clamping arm to form an elongated structure, the limiting protrusion has a pressing arc surface, the groove has a pressure-receiving arc surface that can be pressed by the pressing arc surface, and the pressing arc surface and the pressure-receiving arc surface are in line contact or surface contact. When the tissue held by the first clamping arm and the second clamping arm are not in the same shape, the first clamping arm and / or the second clamping arm will adapt to the deformation, and the contact position of the pressure arc surface and the pressure-bearing arc surface will change.

[0010] By adopting the above technical solution, the contact method between the pressure-receiving arc surface and the pressure-receiving arc surface can avoid stress singularities at the contact points, while making the contact process smoother and without jamming. When clamping tissues with uneven thickness and shape, the adaptive deformation generated by the first clamping arm and / or the second clamping arm will drive the contact position between the pressure-receiving arc surface and the pressure-receiving arc surface to be dynamically adjusted, so that the stress is distributed on other positions of the elastic connector, and there will be no local overload. This further improves the clamping stability and fracture resistance, and also expands the types of tissues that this application can clamp. This design can also ensure that the limiting function of the limiting protrusion is always effective.

[0011] Preferably, the first clamping arm and the second clamping arm are bent in the same direction, and when the first clamping arm and the second clamping arm are closed, a clamping space is formed between the first clamping arm and the second clamping arm.

[0012] By adopting the above technical solution, the first and second clamping arms, which bend in the same direction, can form an encircling clamping space, better conforming to the natural shape of blood vessels and tissues, so that the clamping force is evenly distributed along the circumference of the tissue, avoiding excessive local pressure that could damage the tissue, while improving the firmness of the clamping and preventing tissue slippage.

[0013] Preferably, the clamping end of the first clamping arm facing the clamping space and / or the clamping end of the second clamping arm facing the clamping space have anti-slip ridges, and the cross-section of the anti-slip ridges is at least one of wavy, toothed, sawtooth, and trapezoidal shapes.

[0014] By adopting the above technical solutions, the anti-slip edge can effectively increase the friction between the clamping end and the tissue, significantly reduce the risk of tissue slippage during surgery, and improve the reliability of closed clamping; the design of multiple cross-sectional shapes can adapt to tissues of different textures and thicknesses, expanding the clinical applicability of closed clamps.

[0015] Preferably, the first clamping arm, the second clamping arm, and the elastic connector are all made of magnesium metal, which has the ability to deform.

[0016] By adopting the above technical solution, magnesium metal with deformation capability has excellent biocompatibility and degradability. After completing the hemostasis and ligation functions in the body, it can be gradually absorbed and metabolized by the human body, eliminating the need for a second surgery to remove it and reducing patient pain. At the same time, it has suitable elastic deformation capability, which can meet the mechanical requirements of the closure clamp opening and clamping.

[0017] Preferably, the first clamping arm includes a bent portion at the end away from the elastic connector, the bent portion having a locking groove, and the second clamping arm includes a locking protrusion at the end away from the elastic connector; when the locking protrusion is engaged in the locking groove, the first clamping arm and the second clamping arm are closed.

[0018] By adopting the above technical solution, the locking protrusion and the locking groove can reliably lock the first and second clamping arms, preventing hemostasis failure caused by the clamping arms accidentally opening after closing.

[0019] Preferably, the bent portion also has a clearance groove on one side of the locking groove, the clearance groove being used to provide deformation clearance space for the locking protrusion to engage with the locking groove.

[0020] By adopting the above technical solution, the clearance groove can cause slight elastic deformation of the bending part during the locking process, which greatly reduces the resistance of the locking protrusion into the locking groove, making the doctor's operation feel lighter, while avoiding the bending part from breaking due to rigid jamming, and improving the smoothness of the locking process and service life.

[0021] Preferably, the bent portion also has an inlet ramp, and the locking protrusion has a guide ramp. The guide ramp and the inlet ramp work together to help guide the locking protrusion into the locking groove.

[0022] By adopting the above technical solution, the inclined plane and the guide inclined plane form a two-way guiding cooperation, which can automatically correct the slight alignment deviation in the locking process, guide the locking protrusion to slide into the locking groove accurately and smoothly, avoid jamming, further improve the locking alignment accuracy and operation convenience, and adapt to the surgical operation under minimally invasive small field of vision.

[0023] Preferably, the first clamping arm and / or the second clamping arm have a fastening portion.

[0024] By adopting the above technical solution, the clamping part can stably cooperate with the clamping head, enabling doctors to accurately control the opening, closing and release of the clamping clamp, thereby improving the controllability and accuracy of surgical operations.

[0025] Preferably, the first clamping arm, the second clamping arm, and the elastic connector are an integral structure.

[0026] By adopting the above technical solution, the integrated structure has no assembly gaps or connection interfaces, avoiding the risk of preferential corrosion, loosening and breakage of the assembly parts, especially the elastic connectors, during the degradation process. The overall structure has higher strength and better reliability. At the same time, it simplifies the production process and reduces manufacturing costs.

[0027] In summary, the present invention has at least one of the following beneficial technical effects: 1. In this application, the arc-shaped arm replaces the traditional straight arm, enabling a smooth fan-shaped displacement when the first and second clamping arms close, thus avoiding disordered force direction of the elastic connector; the limiting protrusion on the inner side of the elastic connector cooperates with the groove, which on the one hand can accurately limit the maximum closing stroke of the closing clamp, preventing plastic deformation and fracture of the connecting arc plate (i.e., the tail of this application) caused by excessive closure, and at the same time avoiding tissue damage caused by excessive compression of blood vessels; on the other hand, when the limiting protrusion presses against the wall of the groove, it forms an internal support structure, dispersing the stress originally concentrated at a single point on the connecting arc plate to the contact area between the limiting protrusion and the groove, greatly reducing the stress concentration of the elastic connector and significantly improving the fracture resistance of the closing clamp; 2. The contact method between the pressure-resistant arc surface and the pressure-receiving arc surface can avoid stress singularities at the contact point and make the contact process smoother and without jamming. When clamping tissues with uneven thickness and shape, the adaptive deformation generated by the first clamping arm and / or the second clamping arm will drive the contact position between the pressure-resistant arc surface and the pressure-receiving arc surface to be dynamically adjusted, so that the stress is distributed on other positions of the elastic connector, and there will be no local overload. This further improves the clamping stability and fracture resistance, and also expands the types of tissues that this application can clamp. This design can also ensure that the limiting function of the limiting protrusion is always effective. 3. The integrated structure has no assembly gaps or connection interfaces, avoiding the risk of preferential corrosion, loosening and breakage of the assembly parts, especially the elastic connectors, during the degradation process. The overall structure has higher strength and better reliability; at the same time, it simplifies the production process and reduces manufacturing costs. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of a biodegradable magnesium metal closure clip from one perspective in Embodiment 1 of this application; Figure 2 This is a schematic diagram of the overall structure of a biodegradable magnesium metal closure clip from another perspective in Embodiment 1 of this application; Figure 3 This is a structural diagram used to illustrate the closing of the first and second clamping arms; Figure 4 yes Figure 3 Enlarged view of section A; Figure 5 This is a cross-sectional view used to illustrate the pressure plate in Embodiment 2; Figure 6 This is a cross-sectional view used to illustrate the pressure plate in Example 3.

[0029] The following labels are used in the attached diagram: 1. First clamping arm; 11. Bending part; 111. Locking groove; 1111. Snap-fit ​​groove; 112. Guide slope; 113. Clearance groove; 2. Second clamping arm; 21. Locking protrusion; 211. Guide slope; 212. Conical part; 3. Elastic connector; 31. Connecting arc plate; 32. Limiting protrusion; 321. Pressing arc surface; 33. Groove; 331. Pressurized arc surface; 4. Clamping space; 5. Anti-slip ridge; 6. Buckling part; 7. Receiving groove; 71. Pressing plate; 72. Connecting hole; 73. Pressing bolt. Detailed Implementation

[0030] The present invention will be further described in detail below with reference to the accompanying drawings.

[0031] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention. Example

[0032] Embodiment 1 of this application discloses a biodegradable magnesium metal closure clip. (See also...) Figure 1 , Figure 2 and Figure 3 A biodegradable magnesium metal closure clip includes a first clamping arm 1, a second clamping arm 2, and an elastic connector 3. The first clamping arm 1 is located above the second clamping arm 2 and is connected to the second clamping arm 2 via the elastic connector 3. Both the first clamping arm 1 and the second clamping arm 2 are constructed as arc-shaped arms and are bent downwards in the same direction. The elastic connector 3 is configured to allow the first clamping arm 1 and the second clamping arm 2 to open and close using the elastic connector 3 as a fulcrum. When the first clamping arm 1 and the second clamping arm 2 are closed, a clamping space 4 for clamping tissue is formed between the first clamping arm 1 and the second clamping arm 2.

[0033] Applying force to the first clamping arm 1 and the second clamping arm 2 can cause the first clamping arm 1 and the second clamping arm 2 to open or close to clamp the tissue.

[0034] Reference Figure 1 , Figure 2 and Figure 3 The first clamping arm 1, the second clamping arm 2, and the elastic connector 3 are an integral structure. The first clamping arm 1, the second clamping arm 2, and the elastic connector 3 are all made of magnesium metal with deformation capability. The magnesium metal can be pure magnesium or magnesium alloy.

[0035] The integrated structure eliminates assembly gaps and connection interfaces, avoiding the risk of preferential corrosion, loosening, and breakage at the assembly points during degradation, resulting in higher overall structural strength. Magnesium, with its deformable properties, exhibits excellent biocompatibility and biodegradability. After performing hemostasis and ligation functions within the body, it can be gradually absorbed and metabolized, eliminating the need for secondary surgery. Furthermore, its suitable elastic deformation capacity meets the mechanical requirements for opening and closing the clamp.

[0036] Reference Figure 3 and Figure 4 To ensure the reliability of the first clamping arm 1 and the second clamping arm 2 after they are closed, the first clamping arm 1 includes a bent portion 11 extending downward from the end away from the elastic connector 3, and the right end of the bent portion 11 has a locking groove 111. The second clamping arm 2 includes a locking protrusion 21 at the end away from the elastic connector 3.

[0037] When the first clamping arm 1 and the second clamping arm 2 are closed, the locking protrusion 21 can be engaged into the locking groove 111 to complete the connection and locking of the first clamping arm 1 and the second clamping arm 2.

[0038] Reference Figure 3 and Figure 4 In order to facilitate the locking protrusion 21 to be inserted into the locking groove 111, the bent part 11 also has an inlet slope 112. The locking protrusion 21 has a guide slope 211. Both the guide slope 211 and the inlet slope 112 are inclined upward from left to right. The cooperation of the guide slope 211 and the inlet slope 112 can help guide the locking protrusion 21 to be deformed and inserted into the locking groove 111.

[0039] The guide ramp 112 and the guide ramp 211 form a bidirectional guiding fit, which can automatically correct minor alignment deviations during the locking process and guide the locking protrusion 21 to slide precisely and smoothly into the locking groove 111, adapting to minimally invasive surgical operations with a small field of vision. Furthermore, when the locking protrusion 21 is engaged in the locking groove 111, due to the instantaneous impact of the locking protrusion 21 and the instantaneous recovery of its deformation, the first clamping arm 1 and the second clamping arm 2 will provide clear tactile feedback and emit a prompt sound when they close.

[0040] Reference Figure 3 and Figure 4The bent portion 11 also has a relief groove 113 above the locking groove 111. The relief groove 113 provides deformation relief space for the locking protrusion 21 to engage with the locking groove 111. Preferably, to facilitate deformation, the width of the structural section on the left side of the relief groove 113 on the bent portion 11 is smaller than the vertical width of the first clamping arm 1 and the second clamping arm 2, so as to help reduce the closing force required when the first clamping arm 1 and the second clamping arm 2 are closed.

[0041] The clearance groove 113 facilitates the slight elastic deformation of the bent part 11 during the locking process, greatly reducing the resistance of the locking protrusion 21 into the locking groove 111, making the doctor's operation feel lighter, while avoiding the breakage of the bent part 11 caused by rigid jamming, thus improving the smoothness of the locking process and service life.

[0042] In addition, the clearance groove 113 also provides a temporary space for tissue when the first clamping arm 1 and the second clamping arm 2 clamp thicker tissue. After the first clamping arm 1 and the second clamping arm 2 are closed, the thicker tissue can enter the clearance groove 113 for temporary storage. Therefore, the design of the clearance groove 113 can prevent the tissue from being excessively squeezed when the first clamping arm 1 and the second clamping arm 2 are closed, thus preventing problems such as tissue cutting.

[0043] Reference Figure 3 and Figure 4 Typically, biodegradable closure clips are for single-use closure and need to be easy to close but not easy to open. Therefore, in this application, in order to further improve the closure reliability of the first clamping arm 1 and the second clamping arm 2, the locking protrusion 21 also includes a cone portion 212, and the locking groove 111 includes a snap-fit ​​groove portion 1111. The cone portion 212 snaps into the snap-fit ​​groove portion 1111. Neither the cone portion 212 nor the snap-fit ​​groove portion 1111 has a chamfer.

[0044] Reference Figure 2 and Figure 3 In this embodiment, both the clamping end of the first clamping arm 1 facing the clamping space 4 and the clamping end of the second clamping arm 2 facing the clamping space 4 have anti-slip ridges 5. In other embodiments, either the clamping end of the first clamping arm 1 or the clamping end of the second clamping arm 2 facing the clamping space 4 has an anti-slip ridge 5, which extends along the thickness direction of the first clamping arm 1. In this application, the cross-section of the anti-slip ridge 5 is at least one of wavy, toothed, serrated, and trapezoidal shapes. In this embodiment, the cross-section of the anti-slip ridge 5 is specifically wavy.

[0045] The anti-slip ridge 5 effectively increases the friction between the clamping end and the tissue, significantly reducing the risk of tissue slippage during surgery and improving the reliability of closure clamping. Multiple cross-sectional shapes are available to adapt to tissues of different textures and thicknesses, expanding the clinical applicability of the closure clamp. Typically, wavy cross-section ridges are suitable for softer, smoother blood vessels and soft tissues; serrated and sawtooth cross-section ridges are suitable for tougher, unevenly thick bundled or vascular tissues; and trapezoidal cross-section ridges are suitable for rougher connective tissues. Furthermore, the anti-slip ridge 5 also prevents excessive shearing of the tissue by the first clamping arm 1 and the second clamping arm 2, which could lead to conditions such as vascular rupture, ischemia, or necrosis.

[0046] Reference Figure 3 and Figure 4 In order to facilitate the opening and closing of the first clamping arm 1 and the second clamping arm 2 by applying force, in this embodiment, the upper end face of the first clamping arm 1 and the lower end face of the second clamping arm 2 are both provided with a fastening part 6. In other embodiments, the fastening part 6 may be provided only on the first clamping arm 1 or the second clamping arm 2.

[0047] The holding part 6 can stably cooperate with the head of auxiliary tools such as clamping forceps, so that doctors can accurately control the opening and closing of the clamp and the release of the closure clamp, improving the controllability and accuracy of the surgical operation.

[0048] Reference Figure 2 and Figure 3 The elastic connector 3 includes a connecting arc plate 31 and a limiting protrusion 32 and a groove 33 formed on the wall of the connecting arc plate 31. The two ends of the connecting arc plate 31 are respectively connected to the first clamping arm 1 and the second clamping arm 2. The limiting protrusion 32 and the groove 33 are located on the side of the elastic connector 3 facing the space enclosed by the first clamping arm 1 and the second clamping arm 2.

[0049] Reference Figure 2 and Figure 3 The limiting protrusion 32 extends along the thickness direction of the first clamping arm 1 to form a long strip structure. The limiting protrusion 32 has a pressing arc surface 321, and the groove 33 has a pressure-receiving arc surface 331 that can be pressed by the pressing arc surface 321. The pressing arc surface 321 and the pressure-receiving arc surface 331 are in line contact or surface contact. When the first clamping arm 1 and the second clamping arm 2 are closed, the limiting protrusion 32 presses against the wall of the groove 33 at least partially to limit the first clamping arm 1 and the second clamping arm 2 from closing too far and to disperse the stress at the elastic connector 3.

[0050] Specifically, when the first clamping arm 1 and the second clamping arm 2 are closed but not clamping tissue, the pressure-abutting arc surface 321 and the pressure-receiving arc surface 331 do not contact each other; when the first clamping arm 1 and the second clamping arm 2 are closed and clamping tissue, the pressure-abutting arc surface 321 partially presses against the pressure-receiving arc surface 331 to disperse the stress of the connecting arc plate 31. Under the above-mentioned pressure conditions, when facing blood vessels or tissues of varying thicknesses, the first clamping arm 1 and the second clamping arm 2 can locally adapt to deformation, so that the contact position between the limiting protrusion 32 and the groove 33 changes adaptively in real time, ensuring uniform clamping force and stable clamping state. Specifically, when the clamped tissue volume is small, the contact position between its limiting protrusion 32 and the groove 33 will be higher, while when the clamped tissue volume is large, the contact position between its limiting protrusion 32 and the groove 33 will be lower. It should be noted that the contact between the limiting protrusion 32 and the groove 33 is usually a line contact, but when clamping various types of tissues, the limiting protrusion 32 and the groove 33 may deform and change to a surface contact.

[0051] With the above design, reliable clamping can be achieved in one go without changing different sizes of closure clamps, even in complex tissue morphologies. In this application, when the first clamping arm 1 and the second clamping arm 2 are in the closed state, the shape of the first clamping arm 1 and the second clamping arm 2 is mainly defined by the elastic connector 3 and the connection and cooperation between the locking protrusion 21 and the locking groove 111, which is a two-end limiting structure. When the tissue is located within the clamping space 4, the first clamping arm 1 and the second clamping arm 2 deform to form a ring-shaped structure. This can avoid tissue ischemia and damage due to excessive clamping or clamping failure due to excessive looseness, which significantly improves the safety and success rate of the operation. In addition, the design of the limiting protrusion 32 and the groove 33 is to prevent the first clamping arm 1 from moving out of place, and also to prevent the tissue located in the clamping space 4 from accidentally entering the connection position of the first clamping arm 1 and the second clamping arm 2, and to prevent the tissue from being insufficiently clamped and unable to reliably block the flow.

[0052] In this application, to minimize damage to other tissues in the human body, the outer walls of the first clamping arm 1 and the second clamping arm 2 are both smooth transition curved surfaces. It should also be noted that, because magnesium metal possesses both good elastic deformation capacity and moderate plastic deformation capacity, the number of uses of a single biodegradable closure clamp as a consumable material will not be excessive. Therefore, this application can reliably prevent the elastic connector 3 from breaking during opening and closing.

[0053] The implementation principle of a biodegradable magnesium metal closure clamp in Embodiment 1 of this application is as follows: after the tissue is located between the first clamping arm 1 and the second clamping arm 2, an external tool, such as a clamping pliers, is used to drive the first clamping arm 1 and the second clamping arm 2 to close through the fastening part 6. Under the guidance of the guide slope 112 and the guide slope 211, the locking protrusion 21 is engaged in the locking groove 111, and the tissue clamping is completed at this time. Example

[0054] Reference Figure 5 The difference between Embodiment 2 and Embodiment 1 is that: a receiving groove 7 is opened at one end of the first clamping arm 1 near the clamping space 4, and a magnesium metal pressure plate 71 is provided in the receiving groove 7. The two ends of the pressure plate 71 are fixedly connected to the receiving groove 7, and the pressure plate 71 is arranged along the extension direction of the first clamping arm 1. A plurality of connecting holes 72 extending to the receiving groove 7 are opened at the upper end of the first clamping arm 1. The plurality of connecting holes 72 are distributed along the setting direction of the pressure plate 71, and each connecting hole 72 is threadedly connected to a magnesium metal pressure bolt 73. The lower end of the pressure bolt 73 presses against the pressure plate 71. Rotating the pressure bolt 73 can drive the pressure bolt 73 to move down and press against the pressure plate 71, so that the pressure plate 71 is deformed at the pressed position. Based on this design, the pressure intensity on various positions of the tissue can be locally fine-tuned. In this embodiment, adjacent pressure points are interconnected and deformed in conjunction. Example

[0055] Reference Figure 6 The difference between Embodiment 3 and Embodiment 2 is that: Multiple receiving grooves 7 are provided, and these multiple receiving grooves 7 are distributed along the setting direction of the first clamping arm 1. When the tissue is located within the clamping space 4, different pressures on different positions of the tissue can be obtained by adjusting the pressure plates 71 within each receiving groove 7. In this embodiment, adjacent pressure points are independent of each other, can be adjusted separately, and do not interfere with each other.

[0056] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A biodegradable magnesium metal closure clip, characterized in that: It includes a first clamping arm (1), a second clamping arm (2) and an elastic connector (3). The first clamping arm (1) is connected to the second clamping arm (2) through the elastic connector (3). Both the first clamping arm (1) and the second clamping arm (2) are constructed as arc-shaped arms. The elastic connector (3) is constructed to enable the first clamping arm (1) and the second clamping arm (2) to open and close with the elastic connector (3) as a fulcrum. The elastic connector (3) includes a connecting arc plate (31), a limiting protrusion (32), and a groove (33) for accommodating the limiting protrusion (32). The two ends of the connecting arc plate (31) are respectively connected to the first clamping arm (1) and the second clamping arm (2). The limiting protrusion (32) and the groove (33) are formed on the side of the connecting arc plate (31) facing the space enclosed by the first clamping arm (1) and the second clamping arm (2). When the first clamping arm (1) and the second clamping arm (2) are closed, the limiting protrusion (32) at least partially abuts against the wall of the groove (33) to limit the first clamping arm (1) and the second clamping arm (2) from closing too far and to disperse the stress at the elastic connector (3).

2. The biodegradable magnesium metal closure clip according to claim 1, characterized in that: The limiting protrusion (32) extends along the thickness direction of the first clamping arm (1) to form a long strip structure. The limiting protrusion (32) has a pressing arc surface (321). The groove (33) has a pressure-receiving arc surface (331) that can be pressed by the pressing arc surface (321). The pressing arc surface (321) and the pressure-receiving arc surface (331) are in line contact or surface contact. When the tissue morphology held by the first clamping arm (1) and the second clamping arm (2) is inconsistent, the first clamping arm (1) and / or the second clamping arm (2) will adapt to deformation, and the contact position of the pressure arc surface (321) and the pressure arc surface (331) will change.

3. The biodegradable magnesium metal closure clip according to claim 1, characterized in that: The first clamping arm (1) and the second clamping arm (2) are bent in the same direction. When the first clamping arm (1) and the second clamping arm (2) are closed, a clamping space (4) is formed between the first clamping arm (1) and the second clamping arm (2).

4. The biodegradable magnesium metal closure clip according to claim 3, characterized in that: The clamping end of the first clamping arm (1) facing the clamping space (4) and / or the clamping end of the second clamping arm (2) facing the clamping space (4) have anti-slip ridges (5), and the cross section of the anti-slip ridges (5) is at least one of wavy, toothed, sawtooth, and trapezoidal.

5. The biodegradable magnesium metal closure clip according to claim 1, characterized in that: The first clamping arm (1), the second clamping arm (2), and the elastic connector (3) are all made of magnesium metal, which has the ability to deform.

6. The biodegradable magnesium metal closure clip according to claim 5, characterized in that: The first clamping arm (1) includes a bent portion (11) at one end away from the elastic connector (3), the bent portion (11) having a locking groove (111), and the second clamping arm (2) includes a locking protrusion (21) at one end away from the elastic connector (3); when the locking protrusion (21) is engaged in the locking groove (111), the first clamping arm (1) and the second clamping arm (2) are closed.

7. A biodegradable magnesium metal closure clip according to claim 6, characterized in that: The bent portion (11) also has a relief groove (113) on one side of the locking groove (111), the relief groove (113) is used to provide deformation relief space for the locking protrusion (21) to be engaged in the locking groove (111).

8. A biodegradable magnesium metal closure clip according to claim 6, characterized in that: The bent portion (11) also has an inlet ramp (112), and the locking protrusion (21) has a guide ramp (211). The guide ramp (211) and the inlet ramp (112) work together to help guide the locking protrusion (21) into the locking groove (111).

9. The biodegradable magnesium metal closure clip according to claim 1, characterized in that: The first clamping arm (1) and / or the second clamping arm (2) have a fastening part (6).

10. A biodegradable magnesium metal closure clip according to claim 1, characterized in that: The first clamping arm (1), the second clamping arm (2), and the elastic connector (3) are an integral structure.

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