Medical tubular polymer fabric shaping mechanism

Abstract

The utility model provides a medical tubular polymer fabric shaping mechanism which is characterized in that a plurality of through holes are evenly formed in the pipe wall of a placement pipe in the circumferential direction and form a group, a plurality of groups of through holes are formed in the placement pipe in the axial direction of the placement pipe, an inner hose is arranged in the placement pipe, and a plurality of shaping assemblies are arranged on the placement pipe. Each shaping assembly comprises a connecting rod, a shaping block, a fixing block and an elastic piece, the connecting rod is inserted into the through hole in a sliding mode, the shaping block is arranged at one end of the connecting rod, the fixing block is arranged at the other end of the connecting rod, the two opening assemblies are oppositely arranged in the inner hose in a sliding mode, each opening assembly comprises an opening block and a control rod, and the control rod is connected with the opening block. The diameter of the middle of the opening block is larger than that of the inner hose, and one end of the control rod is connected with the opening block. The tubular polymer fabric shaping device can reduce manual operation when the tubular polymer fabric is opened, so that the problem that the appearance of the tubular polymer fabric is damaged due to excessive force can be avoided, and the success rate of tubular polymer fabric shaping is improved.

Description

Technical Field

[0001] This utility model relates to the field of medical polymer fabric technology, specifically to a medical tubular polymer fabric shaping mechanism. Background Technology

[0002] One-piece molded polymer braided tubing has wide applications in medical devices, such as endovascular stent graft systems for treating aortic dissection or artificial blood vessels used in aortic arch replacement surgery. Traditional medical polymer tubular fabrics are made by sewing flat fabric together, which easily leads to bleeding at the suture site, unsightly sutures, and is complex and inefficient. Current technologies, however, mostly use interwoven yarns to form one-piece molded medical polymer tubular fabrics. Furthermore, the medical polymer tubular fabrics produced using current technologies can be customized to different diameters and lengths to accommodate blood vessels of varying sizes, eliminating the need for sutures and thus greatly improving production efficiency and product diversity.

[0003] However, existing medical polymer tubular fabrics are flattened during weaving and require shaping to better support blood vessels. However, because these fabrics are woven from yarns, they are inherently soft and easily deformed by external pressure, forming creases and holes that affect the compliance and permeability of the blood vessels. Therefore, existing technology has certain limitations. Utility Model Content

[0004] This invention was developed to solve the above-mentioned problems, and its purpose is to provide a medical tubular polymer fabric shaping mechanism.

[0005] This utility model provides a medical tubular polymer fabric shaping mechanism, characterized by: a cylindrical placement tube, multiple through holes evenly distributed circumferentially on the tube wall, the multiple through holes forming a group, and multiple groups of through holes arranged axially on the placement tube.

[0006] The inner flexible tube is cylindrical and is installed inside the placement tube. The length of the inner flexible tube is not less than the length of the placement tube.

[0007] Multiple shaping components are mounted on the placement tube. Each shaping component includes a connecting rod, a shaping block, a fixing block, and an elastic element. The connecting rod is slidably inserted into the through hole. The shaping block and the fixing block are both arc-shaped plates. The shaping block is located on one end of the connecting rod, and the fixing block is located on the other end of the connecting rod. The elastic element is sleeved on the connecting rod, with one end connected to the fixing block and the other end connected to the inner wall of the placement tube.

[0008] Two expansion components are slidably disposed within the inner flexible tube. Each expansion component includes an expansion block and a control rod. The two ends of the expansion block are sliding parts, and the middle is the expansion part. The sliding parts are shaped like a dome cone, and the expansion part is cylindrical. The diameter of the expansion part is larger than the diameter of the inner flexible tube. One end of the control rod is connected to the expansion block, and the other end is always located outside the inner flexible tube.

[0009] Among them, the shaping blocks on one end of the multiple connecting rods inserted in the same group of through holes can form a first ring, and the inner wall of the first ring is in contact with the outer wall of the placement tube. The fixing blocks on the other end of the multiple connecting rods inserted in the same group of through holes can form a second ring, and the inner wall of the second ring is in contact with the outer wall of the inner hose.

[0010] The medical tubular polymer fabric shaping mechanism provided by this utility model also has the following feature: the length of the placement tube is not less than the length of the tubular polymer fabric.

[0011] The medical tubular polymer fabric shaping mechanism provided by this utility model also has the following feature: the inner tube is made of a flexible material that can undergo elastic deformation.

[0012] The medical tubular polymer fabric shaping mechanism provided by this utility model also has the following feature: the shaping block is made of a material with thermal expansion and contraction properties.

[0013] The medical tubular polymer fabric shaping mechanism provided by this utility model also has the following feature: the length of the spreading part is not greater than the length of the shaping block and the fixing block.

[0014] The medical tubular polymer fabric shaping mechanism provided by this utility model also has the following feature: the difference between the diameter of the spreading part and the diameter of the inner tube is less than the thickness of the shaping block.

[0015] The medical tubular polymer fabric shaping mechanism provided by this utility model also has the following feature: the diameter of the first ring is 0 to 0.2 mm larger than the diameter of the tubular polymer fabric.

[0016] Functions and effects of utility models

[0017] According to the medical tubular polymer fabric shaping mechanism involved in this utility model, the manual operation when stretching the tubular polymer fabric can be reduced. Therefore, the problem of damaging the appearance of the fabric due to poor force control when stretching the tubular polymer fabric can be avoided, thereby improving the success rate of shaping the tubular polymer fabric and indirectly reducing the cost. Attached Figure Description

[0018] Figure 1 This is a cross-sectional schematic diagram of a medical tubular polymer fabric shaping mechanism according to the present invention.

[0019] Explanation of reference numerals in the attached figures:

[0020] 10. Installation tube; 11. Through hole; 20. Inner flexible tube; 30. Shaping assembly; 31. Connecting rod; 32. Shaping block; 33. Fixing block; 34. Elastic element; 40. Spreading assembly; 41. Spreading block; 411. Sliding part; 412. Spreading part; 42. Control rod. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this utility model easy to understand, the following embodiments are described in detail with reference to the accompanying drawings.

[0022] Example

[0023] Figure 1 This is a cross-sectional schematic diagram of a medical tubular polymer fabric shaping mechanism according to the present invention.

[0024] like Figure 1 As shown, this embodiment provides a medical tubular polymer fabric shaping mechanism, including: placement tube 10, inner flexible tube 20, multiple shaping components, and two spreading components 40.

[0025] like Figure 1 As shown, the placement tube 10 is cylindrical, and multiple through holes 11 are evenly distributed on the tube wall along the circumference. The multiple through holes 11 are grouped together, and multiple groups of through holes 11 are provided on the placement tube 10 along its axial direction. The length of the placement tube 10 is not less than the length of the tubular polymer fabric.

[0026] In this embodiment, the placement tube 10 is preferably made of stainless steel.

[0027] like Figure 1 As shown, the inner flexible tube 20 is cylindrical and is disposed inside the placement tube 10. The length of the inner flexible tube 20 is not less than the length of the placement tube 10. The inner flexible tube 20 is made of a flexible material that can undergo elastic deformation.

[0028] In this embodiment, the inner hose 20 is preferably made of thermoplastic elastomer.

[0029] In use, because the length of the placement tube 10 is not less than the length of the tubular polymer fabric, and the length of the inner hose 20 is not less than the length of the placement tube 10, it can prevent the tubular polymer fabric from being unable to be stretched and shaped after being fitted onto the shaping mechanism of this utility model, and can make each first ring composed of multiple shaping blocks 32 in the same group be stretched and protruded.

[0030] like Figure 1As shown, multiple shaping components 30 are disposed on the placement tube 10. Each shaping component 30 includes a connecting rod 31, a shaping block 32, a fixing block 33, and an elastic element 34. The connecting rod 31 is slidably inserted into the through hole 11. The shaping block 32 and the fixing block 33 are both arc-shaped plates, with the shaping block 32 disposed on one end of the connecting rod 31 and the fixing block 33 disposed on the other end of the connecting rod 31. The elastic element 34 is sleeved on the connecting rod 31, with one end of the elastic element 34 connected to the fixing block 33 and the other end connected to the inner wall of the placement tube 10. The shaping block 32 is made of a material with thermal expansion and contraction properties.

[0031] In this embodiment, the shaping block 32 is preferably made of nylon material.

[0032] In this embodiment, the elastic element 34 is preferably a spring.

[0033] In this embodiment, the shaping blocks 32 on one end of the multiple connecting rods 31 inserted into the same group of through holes 11 can form a first ring, the inner wall of the first ring being in contact with the outer wall of the placement tube 10. The fixing blocks 33 on the other end of the multiple connecting rods 31 inserted into the same group of through holes 11 can form a second ring, the inner wall of the second ring being in contact with the outer wall of the inner flexible tube 20. The diameter of the first ring is 0 to 0.2 mm larger than the diameter of the tubular polymer fabric.

[0034] In use, because the shaping block 32 is made of nylon, it reduces manufacturing costs while still satisfying the function of thermal expansion and contraction. Furthermore, because the diameter of the first ring is 0 to 0.2 mm larger than the diameter of the tubular polymer fabric, when the tubular polymer fabric is fitted onto multiple first rings, the first rings themselves can stretch the tubular polymer fabric in one go.

[0035] like Figure 1 As shown, two expansion components 40 are slidably disposed within the inner hose 20. Each expansion component 40 includes an expansion block 41 and a control rod 42. The two ends of the expansion block 41 are sliding parts 411, and the middle is an expansion part 412. The sliding part 411 is shaped like a dome cone, and the expansion part 412 is cylindrical. The diameter of the expansion part 412 is larger than the diameter of the inner hose 20. One end of the control rod 42 is connected to the expansion block 41, and the other end is always located outside the inner hose 20.

[0036] In this embodiment, the length of the spreading part 412 is not greater than the length of the shaping block 32 and the fixing block 33.

[0037] In this embodiment, the difference between the diameter of the spreading part 412 and the diameter of the inner hose 20 is less than the thickness of the shaping block 32.

[0038] In this embodiment, the two control levers 42 can be manually pushed by a person, or a servo motor can be installed at the other end of the two control levers 42, and the servo motor can control the movement of the two control levers 42.

[0039] In use, because the length of the spreading part 412 is no greater than the length of the shaping block 32 and the fixing block 33, the spreading block 41 can only spread out a maximum of two first rings. This makes it easy to control which first ring protrudes and avoids affecting the shaping of the tubular polymer fabric due to the protrusion of the first ring. Furthermore, because the difference between the diameter of the spreading part 412 and the diameter of the inner flexible tube 20 is less than the thickness of the shaping block 32, the protrusion height of the first ring will not exceed the thickness of the shaping block 32. That is, the tubular polymer fabric will not be clamped after the first ring protrudes.

[0040] When the shaping process is carried out, the tubular polymer fabric that needs to be shaped is first placed on multiple shaping blocks 32 and positioned in the center so that the tubular polymer fabric is initially stretched.

[0041] Then, the control rod 42 pushes the spreading block 41 to move into the inner hose 20. At this time, because the diameter of the spreading part 412 of the spreading block 41 is larger than the diameter of the inner hose 20, and the inner hose 20 is made of a flexible material that can undergo elastic deformation, the part of the inner hose 20 located on the outer periphery of the spreading part 412 will be spread open. Also, because the fixing blocks 33 on the other end of the multiple connecting rods 31 inserted in the same group of through holes 11 can form a second ring, and the inner wall of the second ring is in contact with the outer wall of the inner hose 20, after the inner hose 20 is spread open, the second ring composed of multiple fixing blocks 33 located on the outer periphery of the spreading part 412 of the inner hose 20 will also be spread open. Furthermore, because the shaping block 32 and the fixing block 33 are respectively located at both ends of the connecting rod 31, they will also cause the first ring composed of multiple shaping blocks 32 in the same group to be spread open. Therefore, when the tubular polymer fabric is fitted onto the multiple sets of shaping blocks 32, the two sets of shaping blocks 32 closest to the tubular polymer fabric and located on both sides of the tubular polymer fabric can protrude, thereby preventing the tubular polymer fabric from slipping off the multiple sets of shaping blocks 32 during the shaping process, thus ensuring the stability of this utility model in use.

[0042] Next, the tubular polymer fabric that has been fixed in place is placed in hot water at 70℃~95℃ for 5~10 minutes and then removed. During this process, the shaping block 32 is made of a material with thermal expansion and contraction properties, so it will expand when heated and thus stretch the tubular polymer fabric again.

[0043] Next, the tubular polymer fabric is placed in cold water at 4℃~10℃ for 5~10 minutes. During this process, the tubular polymer fabric is cooled and shaped, and the shaping block 32 shrinks due to the cold, making it easier to remove the tubular polymer fabric later.

[0044] Finally, the control lever 42 pulls back the expansion block 41 to move outward of the inner hose 20. Because the elastic element 34 is sleeved on the connecting rod 31, and one end of the elastic element 34 is connected to the fixing block 33 and the other end is connected to the inner wall of the placement tube 10, after the inner hose 20 is no longer expanded by the expansion part 412, the elastic element 34 will drive the fixing block 33 and the shaping block 32 to reset. Thus, the shaping block 32 retracts, and the tubular polymer fabric can be easily removed. After drying the tubular polymer fabric, the shaping work of the tubular polymer fabric is completed.

[0045] The role and effect of the embodiments

[0046] According to the medical tubular polymer fabric shaping mechanism involved in this utility model, the manual operation when stretching the tubular polymer fabric can be reduced. Therefore, the problem of damaging the appearance of the fabric due to poor force control when stretching the tubular polymer fabric can be avoided, thereby improving the success rate of shaping the tubular polymer fabric and indirectly reducing the cost.

[0047] The above embodiments are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model.

Claims

1. A shaping mechanism for medical tubular polymer fabrics, characterized in that, include: The placement tube is cylindrical in shape, and multiple through holes are evenly distributed along the circumference of the tube wall. These through holes are grouped together, and multiple groups of through holes are also provided along the axial direction of the placement tube. An inner flexible tube, in the shape of a cylinder, is disposed inside the placement tube, and the length of the inner flexible tube is not less than the length of the placement tube. Multiple shaping components are disposed on the placement tube. Each shaping component includes a connecting rod, a shaping block, a fixing block, and an elastic element. The connecting rod is slidably inserted into the through hole. The shaping block and the fixing block are both arc-shaped plates. The shaping block is disposed on one end of the connecting rod, and the fixing block is disposed on the other end of the connecting rod. The elastic element is sleeved on the connecting rod, with one end connected to the fixing block and the other end connected to the inner wall of the placement tube. Two expansion components are slidably disposed within the inner flexible tube. Each expansion component includes an expansion block and a control rod. The two ends of the expansion block are sliding portions, and the middle is an expansion portion. The sliding portions are shaped like a dome cone, and the expansion portion is cylindrical. The diameter of the expansion portion is larger than the diameter of the inner flexible tube. One end of the control rod is connected to the expansion block, and the other end is always located outside the inner flexible tube. The shaping blocks on one end of the multiple connecting rods inserted into the through holes in the same group can form a first ring, the inner wall of the first ring being in contact with the outer wall of the placement tube. The fixing blocks on the other end of the multiple connecting rods inserted into the through holes in the same group can form a second ring, the inner wall of the second ring being in contact with the outer wall of the inner flexible tube.

2. The medical tubular polymer fabric shaping mechanism according to claim 1, characterized in that: in, The length of the placement tube is not less than the length of the tubular polymer fabric.

3. The medical tubular polymer fabric shaping mechanism according to claim 1, characterized in that: in, The inner hose is made of a flexible material that can undergo elastic deformation.

4. The medical tubular polymer fabric shaping mechanism according to claim 1, characterized in that: in, The shaping block is made of a material that expands and contracts with temperature.

5. The medical tubular polymer fabric shaping mechanism according to claim 1, characterized in that: in, The length of the spreading part is not greater than the length of the shaping block and the fixing block.

6. The medical tubular polymer fabric shaping mechanism according to claim 1, characterized in that: in, The difference between the diameter of the spreading portion and the diameter of the inner hose is less than the thickness of the shaping block.

7. The medical tubular polymer fabric shaping mechanism according to claim 1, characterized in that: in, The diameter of the first ring is 0 to 0.2 mm larger than the diameter of the tubular polymer fabric.

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