Knitting mold for medical apparatus and instruments

Abstract

The bottom end of a winding shaft is connected with the top end of a first bearing shaft, the upper half portion of a second bearing shaft is detachably connected with the outer wall of the inner side of the lower half portion of the first bearing shaft in the circumferential direction, and a structural unit is detachably connected with the outer wall of the outer side of the first bearing shaft. The size of the vertical diagonal line of the top view of the structural unit is not larger than the outer diameter of the second bearing shaft. By adopting the technical scheme, compared with the prior art, the mold has the beneficial effects that the mold is used for providing a knitting outline for the knitting part, only one end of the knitting part is provided with a free end, the opposite direction is a smooth obtuse angle formed after a monofilament is folded, and the free end of the other end can be subjected to shaping treatment according to the required shape and then is arranged in the knitting part. The free end of the knitted part knitted by the mold is in the knitted part and is not in direct contact with a human body, so that the risk of medical instruments is reduced, and the use safety of the instruments is enhanced.

Description

TECHNICAL FIELD

[0001] The present application relates to a braiding mold, in particular to a braiding mold of a medical device, and belongs to the field of medical devices. BACKGROUND

[0002] With the unique structure and superior performance, braided medical devices such as dense mesh stents, thrombus extraction stents, catheters, embolic protection systems, and covered stents can not only effectively meet various complex surgical and therapeutic needs, but also significantly improve the efficiency and safety of medical operations. However, after the braiding process is completed, there are often multiple free ends at both ends of the braided medical device. If these free ends are not properly handled, they may become potential safety hazards.

[0003] In the prior art, the application of welding technology has largely solved the problem of free ends at both ends of braided medical devices, achieving a more secure and reliable connection. However, it is worth noting that from a macro perspective, even with welding and other processing methods, it is still difficult to completely eliminate the risk of free ends causing harm to the human body under certain conditions. For example, under long-term use or extreme conditions, the welded parts may loosen or break, causing the free ends to be exposed again, which may cause harm or health risks to patients. Therefore, for the design and manufacture of braided medical devices, a safe and effective braiding mold is needed to ensure that free ends are effectively avoided during the braiding process. SUMMARY

[0004] To solve the above technical problem of "lack of braiding mold that can effectively avoid free end exposure", the present application provides a braiding mold for a medical device, and the technical scheme is as follows:

[0005] A braiding mold for a medical device, a winding shaft bottom end is connected to a first receiving shaft top end, a second receiving shaft upper half is connected to the first receiving shaft lower half inner side outer wall in a detachable manner, a structure unit is connected to the first receiving shaft outer side outer wall in a detachable manner, and the vertical diagonal line size of the structure unit in a top view is not greater than the outer diameter of the second receiving shaft.

[0006] Optionally, the winding shaft is a bar or a pipe, and the outer diameter of the winding shaft is not greater than the wall thickness of the first receiving shaft.

[0007] Optionally, the detachable connection of the second receiving shaft upper half to the first receiving shaft middle is a spiral connection or a mortise and tenon structure connection.

[0008] Optionally, the connection of the winding shaft bottom end to the first receiving shaft top end is adhesive bonding, welding, threaded connection, or mortise and tenon structure.

[0009] Optionally, the dismounting connection mode of the structural unit to the outer wall of the first receiving shaft is that a limiting pin passes through the structural unit and the outer wall of the first receiving shaft.

[0010] Optionally, the limiting pin does not protrude from the surface of the structural unit.

[0011] Optionally, the radial dimension of the limiting pin is smaller than the mesh size of the braided member.

[0012] Optionally, at least one of the structural unit, the limiting pin, the first receiving shaft and the bobbin is made of metal.

[0013] Optionally, the first receiving shaft is a rod, and the outer diameter of the bobbin is not greater than the diameter of the first receiving shaft.

[0014] Optionally, the second receiving shaft is fixedly connected to the braiding machine.

[0015] Compared with the prior art, the mold is used to provide a braiding contour for a braided member, the braided member has a free end at only one end, and the other end is a smooth obtuse angle formed by folding a single wire, and the free end can be shaped according to the required shape and placed inside the braided member. The free end of the braided member braided by the mold is inside the braided member and does not directly contact the human body, thereby reducing the risk of medical devices and enhancing the safety of the use of the devices. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a schematic diagram of the detachable mold main body structure of the embodiment 1 of the present application;

[0017] Figure 2 is a schematic diagram of the overall structure of the embodiment 1 of the present application;

[0018] Figure 3 is a schematic diagram of the second receiving shaft structure of the embodiment 1 of the present application;

[0019] Figure 4 is a top view of the embodiment of the present application;

[0020] Figure 5 is a schematic diagram of the detachable mold main body structure of the embodiment 2 of the present application;

[0021] Figure 6 is a schematic diagram of the overall structure of the embodiment 2 of the present application;

[0022] Figure 7 is a schematic diagram of the second receiving shaft and the square wedge structure of the embodiment 2 of the present application;

[0023] Figure 8 is a schematic diagram of the structural unit in an upright state of the embodiment of the present application;

[0024] Figure 9 Schematic diagram of the contact surface of the structural unit in an embodiment of the present invention;

[0025] Figure 10 Top view of the structural unit of this invention embodiment;

[0026] Figure 11 A schematic diagram of the inner side of the structural unit in an embodiment of the present invention;

[0027] In the figure: 810, winding shaft; 820, detachable mold body; 821, first contact surface; 822, second contact surface; 830, limiting pin; 840, first receiving shaft; 850, second receiving shaft; 860, structural unit; 870, square wedge. Detailed Implementation

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the protection scope of the present invention.

[0029] The present invention will now be described in detail with reference to embodiments. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other. Example

[0030] like Figures 1 to 4 As shown, this embodiment provides a braiding mold for a medical device. The bottom end of the winding shaft 810 is connected to the top end of the first receiving shaft 840. The upper half of the second receiving shaft 850 is circumferentially detached and connected to the inner outer wall of the lower half of the first receiving shaft 840. The structural unit 860 is detached and connected to the outer outer wall of the first receiving shaft 840. The vertical diagonal dimension of the top view of the structural unit 860 is not greater than the outer diameter of the second receiving shaft 850.

[0031] The winding shaft 810 is a rod or tube, and the outer diameter of the winding shaft 810 is not greater than the wall thickness of the first receiving shaft 840.

[0032] The upper half of the second receiving shaft 850 is circumferentially disassembled and connected to the first receiving shaft 840 via a spiral connection.

[0033] The connection method between the bottom end of the winding shaft 810 and the top end of the first receiving shaft 840 is bonding, welding, threaded connection or tenon and mortise structure.

[0034] The disassembly and connection method of the structural unit 860 to the outer wall of the first receiving shaft 840 is to pass through the limiting pin 830 through the structural unit 860 and the outer wall of the first receiving shaft 840.

[0035] The limiting pin 830 does not protrude from the surface of the structural unit 860.

[0036] The limiting pin 830 has a radial dimension smaller than the mesh size of the knitted piece.

[0037] At least one of the structural unit 860, the limiting pin 830, the first receiving shaft 840, and the winding shaft 810 is made of metal.

[0038] The second receiving shaft 850 is fixedly connected to the knitting machine.

[0039] The winding shaft 810 is a starting winding tool for the knitting wire. A plurality of winding shafts 810 are combined into a ring-shaped whole, which facilitates the realization of different knitting forms during knitting.

[0040] The knitting piece extends along the outer contour of the structural unit 860 according to a specific knitting method until the knitting piece is completed.

[0041] The limiting pin 830 is an embedded part. The limiting pin 830 fixes the structural unit 860 on the first receiving shaft 840 to lock or release the standardized shape of the mold.

[0042] The first receiving shaft 840 is the backbone of the mold, providing a size basis for the entire mold.

[0043] The second receiving shaft 850 is detachably connected to the first receiving shaft 840, which facilitates the adjustment of the knitting shape after knitting is completed.

[0044] The knitting mold can adjust any structural unit according to the structure, size, and properties of the required knitting piece, and the mold can be completely separated from the knitting piece after knitting is completed.

[0045] The second receiving shaft 850 is fixedly connected to the knitting machine and cooperates with it to complete the knitting work.

[0046] The spacing between the winding shafts 810 can be equidistant or other regular spacing.

[0047] As shown in Figure 8 The structural unit 860 has a first support surface 821 and a second support surface 822. The first support surface 821 is attached to the first receiving shaft 840, and the second support surface 822 is attached to the second support surface 822 of the adjacent structural unit 860.

[0048] In the overall outer diameter of the mold, the ring-shaped whole composed of the winding shaft 810 has the smallest outer diameter, which facilitates the disassembly and shaping of the knitting piece.

[0049] The second receiving shaft 850 is detachably connected with the first receiving shaft 840 in the upper half of the circumference, and the detachable connection mode is screw connection.

[0050] As shown in Figure 3 , 9 and 10, LA is the vertical diagonal line size of the structural unit 860, and ODA is the outer diameter of the second receiving shaft 850. The vertical diagonal line size LA of the single structural unit 860 is not greater than the outer diameter ODA of the second receiving shaft, which ensures that each structural unit 860 can completely separate from the mold without affecting the shape of the braided part. The problem of the free end of the braided part exposed is solved, and the difficulty of demolding the braided part is reduced, so that the shape of the braided part is not affected by the mold, and any shaped product can be completed according to actual needs. Embodiment

[0051] As shown in Figures 4 to 8 , the embodiment provides a braiding mold of a medical device, the bobbin 810 is connected with the top end of the first receiving shaft 840, the upper half of the circumference of the second receiving shaft 850 is detachably connected with the inner side of the lower half of the first receiving shaft 840, the structural unit 860 is detachably connected with the outer side of the first receiving shaft 840, and the vertical diagonal line size of the structural unit 860 in the plan view is not greater than the outer diameter of the second receiving shaft 850.

[0052] The first receiving shaft 840 is a bar, and the outer diameter of the bobbin 810 is not greater than the diameter of the first receiving shaft 840.

[0053] The bobbin 810 is a bar or a pipe.

[0054] The upper half of the circumference of the second receiving shaft 850 is detachably connected with the first receiving shaft 840 in the detachable connection mode of mortise and tenon structure connection.

[0055] The connection mode of the bottom end of the bobbin 810 with the top end of the first receiving shaft 840 is adhesive bonding, welding, threaded connection or mortise and tenon structure.

[0056] The detachable connection mode of the structural unit 860 with the outer side of the first receiving shaft 840 is that the limiting pin 830 passes through the structural unit 860 and the outer side of the first receiving shaft 840.

[0057] The limiting pin 830 does not protrude from the surface of the structural unit 860.

[0058] The radial size of the limiting pin 830 is smaller than the grid size of the braided part.

[0059] At least one of the structural unit 860, the limiting pin 830, the first receiving shaft 840 and the bobbin 810 is made of metal material.

[0060] Second receiving shaft 850 is fixedly connected with the braiding machine.

[0061] Wherein, the winding shaft 810 is the starting point of the braiding wire winding tool. A plurality of winding shafts 810 are combined into a ring-shaped whole, which facilitates the realization of different braiding forms during braiding.

[0062] Wherein, the braided part extends along the outer contour of the structural unit 860 according to a specific braiding method until the braided part is completed.

[0063] Wherein, the limiting pin 830 is an embedded part. The limiting pin 830 fixes the structural unit 860 on the first receiving shaft 840 to lock or release the standardized shape of the mold.

[0064] Wherein, the first receiving shaft 840 is the backbone of the mold, providing a size basis for the whole mold.

[0065] Wherein, the second receiving shaft 850 is detachably connected with the first receiving shaft 840, which facilitates the adjustment of the braiding shape after braiding is completed.

[0066] Wherein, the braiding mold can adjust any structural unit according to the structure, size and properties of the required braided part, and the mold can completely separate from the braided part after braiding is completed.

[0067] Wherein, the second receiving shaft 850 is fixedly connected with the braiding machine, and cooperates with the braiding machine to complete the braiding work.

[0068] Wherein, the spacing between the winding shafts 810 can be equidistant or other regular spacing design.

[0069] Wherein, as shown in Figure 8 , the structural unit 860 has a first support surface 821 and a second support surface 822, the first support surface 821 is attached to the first receiving shaft 840, and the second support surface 822 is attached to the second support surface 822 of the adjacent structural unit 860.

[0070] Wherein, in the overall outer diameter of the mold, the outer diameter of the ring-shaped whole composed of the winding shaft 810 is the smallest, which facilitates the disassembly and shaping of the braided part.

[0071] Wherein, the upper half of the second receiving shaft 850 is detachably connected with the first receiving shaft 840 in a mortise and tenon structure. After the second receiving shaft 850 reaches the anchoring position along the preset track of the first receiving shaft 840, the square wedge 870 occupies the track to avoid relative displacement between the first receiving shaft 840 and the second receiving shaft 850 during movement. This embodiment is suitable for various braiding machines.

[0072] Wherein, as shown in Figure 7 , 9As shown in FIG. 10, LA is the vertical diagonal dimension of the structural unit 860, and ODA is the outer diameter of the second receiving shaft 850. The vertical diagonal dimension LA of the single structural unit 860 is not greater than the outer diameter ODA of the second receiving shaft, which ensures that each structural unit 860 can be completely separated from the mold without affecting the shape of the woven piece. The problem of the free end of the woven piece being exposed is solved, and the difficulty of demolding the woven piece is reduced, so that the shape of the woven piece is not affected by the mold, and any shaped product can be completed according to actual needs. Embodiments

[0073] The steps of weaving using the mold provided by the present application include: according to the preset weaving method, the weaving wire is folded and hung on the winding shaft 810, and the two ends of the weaving wire are wound on different spindles. After starting weaving, the woven net forms an outer covering woven piece outside the structural unit 860, and when the whole structural unit 860 is wrapped by the woven piece, the weaving continues to the second receiving shaft 850, and the weaving stops when the woven piece on the second receiving shaft 850 reaches the required length. Then the second receiving shaft is taken off from the whole weaving mold, and the outer covering woven structure on the above-mentioned second receiving shaft is reversely threaded along the axis of the first receiving shaft 840 and fixed, and then the woven mold is treated together with the outer covering woven piece. After shaping, the woven mold first releases the restriction between each structural unit 860 and the first receiving shaft 840 by each limiting pin 830, and then the first receiving shaft 840 and each structural unit 860 are sequentially withdrawn from the end of the woven piece, so that a complete woven piece is obtained. The free end of the woven piece at the end can be subjected to welding or bonding process to ensure the integrity of the woven piece.

[0074] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A braided mold for a medical device, characterized by, The bobbin (810) is connected to the top end of the first receiving shaft (840), the upper half of the second receiving shaft (850) is connected to the inner wall of the lower half of the first receiving shaft (840) in a detachable manner, and the structure unit (860) is connected to the outer wall of the first receiving shaft (840) in a detachable manner. The vertical diagonal dimension of the structure unit (860) in the top view is not greater than the outer diameter of the second receiving shaft (850).

2. A braided mold for medical devices according to claim 1, wherein, The bobbin (810) is a rod or a pipe, and the outer diameter of the bobbin (810) is not greater than the wall thickness of the first receiving shaft (840).

3. A braided mold for medical devices as defined in claim 1, wherein, The upper half of the second receiving shaft (850) is connected to the middle of the first receiving shaft (840) in a detachable manner, and the detachable connection manner is a screw connection or a mortise and tenon structure connection.

4. The braided mold for medical devices of claim 1, wherein, The bottom end of the bobbin (810) is connected to the top end of the first receiving shaft (840) in a connection manner, which is adhesive connection, welding, screw connection or mortise and tenon structure.

5. The braided mold for medical devices of claim 1, wherein, The structure unit (860) is connected to the outer wall of the first receiving shaft (840) in a detachable manner, and the detachable connection manner is that the limiting pin (830) passes through the structure unit (860) and the outer wall of the first receiving shaft (840).

6. A braided mold for a medical device according to claim 5, wherein, The limiting pin (830) does not protrude from the surface of the structure unit (860).

7. A braided mold for a medical device according to claim 5, wherein, The radial dimension of the limiting pin (830) is smaller than the grid size of the woven piece.

8. A braided mold for a medical device according to claim 5, wherein, At least one of the structure unit (860), the limiting pin (830), the first receiving shaft (840) and the bobbin (810) is made of metal material.

9. The braided mold for medical devices of claim 1, wherein, The first receiving shaft (840) is a rod, and the outer diameter of the bobbin (810) is not greater than the diameter of the first receiving shaft (840).

10. The braided mold for medical devices of claim 1, wherein, The second receiving shaft (850) is fixedly connected to the braiding machine.

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