A contrast catheter tip spinning tool

Abstract

The utility model provides a kind of contrast medium catheter tip spinning tool, including base, first vertical board, second vertical board, driving handle, positioning mandrel and multiple spinning petal assemblies, first vertical board and second vertical board are arranged in parallel on base, positioning mandrel passes through first vertical board and second vertical board, spinning petal assembly is set in first vertical board and second vertical board middle, spinning petal assembly is evenly distributed around positioning mandrel along the circumferential direction, spinning petal assembly includes spinning petal, fixed pin and driving pin.The utility model adopts the technology to avoid material heating softening process, so that tip forming cycle is shorter, forming is more stable, production efficiency is greatly improved, while cold pressing forming process makes material molecular structure keep original orientation, when tip and transition section are welded after forming, welding is more firm, can satisfy the security and reliability requirement of clinical use to contrast medium catheter tip.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a tooling for spinning the tip of an angiography catheter. Background Technology

[0002] In the field of interventional medical devices, catheter tip forming technology is crucial to the performance of devices such as microcatheters and angiography catheters. Currently, the tip of angiography catheters requires welding a contrast-enhancing transition section to the white tip; therefore, the forming quality of the tip directly affects the overall performance of the device. At present, the industry commonly uses thermoplastic molding technology to prepare angiography catheter tips. This technology softens the polymer material through heating and then shapes it using molds or specific processes. However, this technology has the following drawbacks: long forming cycle, low production efficiency, insufficient process stability, resulting in poor tip quality consistency. When welding the formed tip to the transition section, problems such as weak welds and poor pressure resistance easily occur, affecting the clinical safety and reliability of the angiography catheter. Therefore, there is an urgent need for angiography catheter tip manufacturing technology with a shorter forming cycle, more stable forming, and stronger subsequent welding to meet the manufacturing requirements of medical angiography catheters. Utility Model Content

[0003] Therefore, one objective of this utility model is to provide a spin forming tool for the tip of angiography catheters to solve the problems mentioned in the background art and overcome the shortcomings of the existing technology.

[0004] To achieve the above objectives, this utility model provides a spin forming tool for angiography catheter tips, including a base, a first upright plate, a second upright plate, a drive handle, a positioning mandrel, and multiple spin forming valve assemblies. The first and second upright plates are arranged parallel to each other on the base. The positioning mandrel passes through the first and second upright plates. The spin forming valve assemblies are located between the first and second upright plates and are evenly distributed around the positioning mandrel in a circumferential direction. Each spin forming valve assembly includes a spin forming valve, a fixing pin, and a drive pin. The spin forming valve includes a machined end and a fixed end. The fixing pin passes through the first and second upright plates and is rotatably connected to the fixed end. The machined end is provided with a drive pin. The drive handle is rotatably connected to the first and second upright plates and is provided with a first through hole that engages with the drive pin.

[0005] Preferably, the drive handle includes a first link, a second link, and a connecting block. One end of the first link is rotatably connected to the first upright plate, one end of the second link is rotatably connected to the second upright plate, and the other end of the first link is connected to the other end of the second link through the connecting block.

[0006] In any of the above embodiments, it is preferred to further include a first bearing and a second bearing, wherein the inner ring of the first bearing is sleeved on the first vertical plate, the inner ring of the second bearing is sleeved on the second vertical plate, one end of the first connecting rod is sleeved on the outer ring of the first bearing, and one end of the second connecting rod is sleeved on the outer ring of the second bearing.

[0007] In any of the above embodiments, it is preferred to further include a guide sleeve, which is disposed inside the first bearing, and the positioning mandrel passes through the second bearing, the first bearing and the guide sleeve in sequence.

[0008] In any of the above embodiments, it is preferred to further include a first spring rod, a second spring rod, a first return spring, and a second return spring. The first spring rod and the second spring rod are disposed on the base. The first return spring is sleeved on the first spring rod, and the second return spring is sleeved on the second spring rod. The upper end of the first return spring abuts against the lower end of the first connecting rod, and the upper end of the second return spring abuts against the lower end of the second connecting rod.

[0009] In any of the above embodiments, it is preferred to further include a rotation limiting screw, which is disposed on the first upright plate. A notch is provided on the side of the first connecting rod away from the connecting block, and the rotation limiting screw is disposed at the notch.

[0010] In any of the above solutions, it is preferred to further include a micro-adjustment screw, one end of which is fixed to the base and the other end of which abuts against the connecting block.

[0011] In any of the above solutions, it is preferred to further include an auxiliary handle, one end of which is disposed on the connecting block, and the other end of which is a free end suspended in the air.

[0012] Compared with the prior art, the advantages and beneficial effects of this utility model are as follows:

[0013] This invention provides a spin forming tool for angiography catheter tips. It employs a mechanical structure in which a drive handle drives multiple sets of spin forming valves to move synchronously. Through an innovative mechanical spin forming method, the angiography catheter tip is shaped. This cold pressing technology avoids the material heating and softening process, resulting in a shorter tip forming cycle, more stable forming, and significantly improved production efficiency. At the same time, the cold pressing process maintains the original orientation of the material's molecular structure, making the weld between the formed tip and the transition section stronger and meeting the safety and reliability requirements of angiography catheter tips for clinical use.

[0014] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0015] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0016] Figure 1 This is a schematic diagram of the structure of a spin forming tool for angiography catheter tips according to an embodiment of the present invention;

[0017] Figure 2 This is a front view and cross-sectional view of a spin forming tool for angiography catheter tips according to an embodiment of the present invention;

[0018] Figure 3 This is another structural schematic diagram of a spin forming tool for angiography catheter tips according to an embodiment of the present invention;

[0019] Figure 4 This is a cross-sectional view of a spin forming tool for angiography catheter tips according to an embodiment of the present invention.

[0020] Wherein: 1-base; 2-first upright plate; 3-second upright plate; 4-drive handle; 5-positioning mandrel; 6-spinning flap assembly; 7-spinning flap; 8-fixing pin; 9-drive pin; 10-processing end; 11-fixed end; 12-first through hole; 13-first connecting rod; 14-second connecting rod; 15-first bearing; 16-second bearing; 17-guide sleeve; 18-first spring rod; 19-second spring rod; 20-first return spring; 21-second return spring; 22-rotation limit screw; 23-notch; 24-fine adjustment screw; 25-auxiliary handle; 26-mandrel fine adjustment screw. Detailed Implementation

[0021] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0022] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] like Figures 1 to 4As shown in the figure, an angiography catheter tip spinning tool according to an embodiment of the present invention includes a base 1, a first upright plate 2, a second upright plate 3, a drive handle 4, a positioning mandrel 5, and multiple spinning flap assemblies 6. The first upright plate 2 and the second upright plate 3 are arranged parallel to each other on the base 1. The positioning mandrel 5 passes through the first upright plate 2 and the second upright plate 3. The spinning flap assemblies 6 are arranged between the first upright plate 2 and the second upright plate 3. The spinning flap assemblies 6 are evenly distributed around the positioning mandrel 5 in the circumferential direction. The spinning flap assembly 6 includes a spinning flap 7, a fixing pin 8, and a drive pin 9. The spinning flap 7 includes a processing end 10 and a fixing end 11. The fixing pin 8 passes through the first upright plate 2 and the second upright plate 3 and is rotatably connected to the fixing end 11. The processing end 10 is provided with a drive pin 9. The drive handle 4 is rotatably connected to the first upright plate 2 and the second upright plate 3. The drive handle 4 is provided with a first through hole 12, which cooperates with the drive pin 9.

[0024] The positioning mandrel 5 is located at the center line connecting the first upright plate 2 and the second upright plate 3. The angiography catheter to be processed is inserted into the positioning mandrel 5. The positioning mandrel 5 is designed with a stepped limit to ensure that the insertion depth of the angiography catheter is constant. The position of the positioning mandrel 5 can be adjusted by the mandrel fine-tuning screw 26 at the rear. One end of the swivel valve is fixed with a fixing pin 8 so that it can only rotate around the fixing pin 8. When the tooling is working, the drive handle 4 drives the swivel valve 7 to rotate in the same direction through the drive pin 9. The diameter of the swivel valve 7 when closed becomes smaller. The processing end 10 cold-presses and shapes the angiography catheter tip. This cold-pressing technology avoids the material heating and softening process, making the tip forming cycle shorter and the forming more stable, which greatly improves the production efficiency. At the same time, the cold-pressing forming process keeps the original orientation of the material molecular structure. When the formed tip is welded to the transition section, the weld is stronger and can meet the safety and reliability requirements of angiography catheter tips for clinical use.

[0025] Optionally, there are 6 rotating valve assemblies 6. The number of rotating valve assemblies 6 is not fixed. Theoretically, the more rotating valves there are, the more ideal the tip effect after rotating. However, this will increase the machining accuracy of the tooling and increase the manufacturing cost. In actual operation, 6 rotating valve assemblies 6 can meet the accuracy requirements of most clinical applications while maintaining a reasonable manufacturing cost.

[0026] In one possible implementation, the drive handle 4 includes a first link 13, a second link 14, and a connecting block. One end of the first link 13 is rotatably connected to the first upright plate 2, one end of the second link 14 is rotatably connected to the second upright plate 3, and the other end of the first link 13 is connected to the other end of the second link 14 through the connecting block.

[0027] When the drive handle 4 moves, the first link 13 and the second link 14 connected by the connecting block rotate synchronously at the same angle, driving the spin valve assembly 6 to work, ensuring the stability and consistency of the angiography catheter tip forming process.

[0028] As one possible implementation, it also includes a first bearing 15 and a second bearing 16. The inner ring of the first bearing 15 is sleeved on the first vertical plate 2, the inner ring of the second bearing 16 is sleeved on the second vertical plate 3, one end of the first connecting rod 13 is sleeved on the outer ring of the first bearing 15, and one end of the second connecting rod 14 is sleeved on the outer ring of the second bearing 16.

[0029] One end of the first connecting rod 13 is rotatably connected to the first vertical plate 2 via the first bearing 15, and one end of the second connecting rod 14 is rotatably connected to the second vertical plate 3 via the second bearing 16.

[0030] As one possible implementation, a guide sleeve 17 is also included, which is disposed inside the first bearing 15, and the positioning spindle 5 passes through the second bearing 16, the first bearing 15 and the guide sleeve 17 in sequence.

[0031] The guide sleeve 17 is used to fix the position of the positioning mandrel 5, effectively suppressing the displacement of the positioning mandrel 5 during the spinning process.

[0032] As one possible implementation, it also includes a first spring rod 18, a second spring rod 19, a first return spring 20, and a second return spring 21. The first spring rod 18 and the second spring rod 19 are disposed on the base 1. The first return spring 20 is sleeved on the first spring rod 18, and the second return spring 21 is sleeved on the second spring rod 19. The upper end of the first return spring 20 abuts against the lower end of the first connecting rod 13, and the upper end of the second return spring 21 abuts against the lower end of the second connecting rod 14.

[0033] When the drive handle 4 moves downward, the first link 13 applies an axial compressive force to the first return spring 20, and the second link 14 applies an axial compressive force to the second return spring 21. The first return spring 20 and the second return spring 21 are compressed and stored. After the tip of the conduit is shaped, the force of the drive handle 4 is removed, and the first return spring 20 and the second return spring 21 simultaneously release their stored energy and automatically rebound, driving the first link 13 and the second link 14 to move upward to complete the reset.

[0034] As one possible implementation, it also includes a rotation limiting screw 22, which is disposed on the first upright plate 2. The first connecting rod 13 has a notch 23 on the side away from the connecting block, and the rotation limiting screw 22 is disposed at the notch 23.

[0035] The rotating limit screw 22 is used to limit the range of motion of the drive handle 4. That is, the size of the notch 23 corresponds to the effective working stroke of the drive handle 4. Optionally, there are two rotating limit screws 22. The first rotating limit screw 22 is set on the first upright plate 2 and cooperates with the first connecting rod 13. The second rotating limit screw 22 is set on the second upright plate 3 and cooperates with the second connecting rod 14.

[0036] As one possible implementation, it also includes a micro-adjustment screw 24, one end of which is fixed to the base 1, and the other end of which abuts against the connecting block.

[0037] When the tooling is not in operation, the micro-adjustment screw 24 provides stable initial position support for the drive handle 4, keeping the spinneret assembly 6 in the preset open position. After the micro-adjustment screw 24 is removed, the drive handle 4 is pressed down to start working.

[0038] As one possible implementation, an auxiliary handle 25 is also included, with one end of the auxiliary handle 25 disposed on the connecting block and the other end of the auxiliary handle 25 being a free end suspended in the air.

[0039] When the tip of the angiography catheter needs to be processed, the operator provides power to the drive handle 4 by pressing the free end of the auxiliary handle 25, thereby completing the processing. The auxiliary handle 25 significantly improves the convenience of operation.

[0040] The working principle of this utility model is as follows:

[0041] Insert the angiography catheter to be processed into the positioning mandrel in the center of the tooling. Press the auxiliary handle to drive the drive handle to rotate downwards. The drive handle drives the spin-forming flap to rotate in the same direction, so that the diameter of the spin-forming flap gradually decreases, completing the cold pressing and shaping of the angiography catheter tip. After the shaping is completed, release the auxiliary handle. The first and second return springs automatically push the drive handle to return to the original position. The drive handle drives the spin-forming flap to unfold synchronously. At this time, the angiography catheter can be pulled out from the positioning mandrel to obtain the pressed angiography catheter tip.

[0042] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0043] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions, and alterations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tooling for spinning the tip of an angiography catheter, characterized in that, The device includes a base, a first upright plate, a second upright plate, a drive handle, a positioning mandrel, and multiple spinning flap assemblies. The first and second upright plates are arranged parallel to each other on the base. The positioning mandrel passes through the first and second upright plates. The spinning flap assemblies are located between the first and second upright plates and are evenly distributed around the positioning mandrel in a circumferential direction. Each spinning flap assembly includes a spinning flap, a fixing pin, and a drive pin. The spinning flap includes a machined end and a fixed end. The fixing pin passes through the first and second upright plates and is rotatably connected to the fixed end. The drive pin is provided on the machined end. The drive handle is rotatably connected to the first and second upright plates and has a first through hole that engages with the drive pin.

2. The angiography catheter tip spinning tool as described in claim 1, characterized in that, The drive handle includes a first link, a second link, and a connecting block. One end of the first link is rotatably connected to the first upright plate, one end of the second link is rotatably connected to the second upright plate, and the other end of the first link is connected to the other end of the second link through the connecting block.

3. The angiography catheter tip spinning tool as described in claim 2, characterized in that, It also includes a first bearing and a second bearing, wherein the inner ring of the first bearing is fitted onto the first upright plate, the inner ring of the second bearing is fitted onto the second upright plate, one end of the first connecting rod is fitted onto the outer ring of the first bearing, and one end of the second connecting rod is fitted onto the outer ring of the second bearing.

4. The angiography catheter tip spinning tool as described in claim 3, characterized in that, It also includes a guide sleeve, which is disposed inside the first bearing, and the positioning mandrel passes through the second bearing, the first bearing and the guide sleeve in sequence.

5. The angiography catheter tip spinning tool as described in claim 2, characterized in that, It also includes a first spring rod, a second spring rod, a first return spring, and a second return spring. The first spring rod and the second spring rod are disposed on the base. The first return spring is sleeved on the first spring rod, and the second return spring is sleeved on the second spring rod. The upper end of the first return spring abuts against the lower end of the first connecting rod, and the upper end of the second return spring abuts against the lower end of the second connecting rod.

6. The angiography catheter tip spinning tool as described in claim 2, characterized in that, It also includes a rotation limiting screw, which is disposed on the first upright plate. The first connecting rod has a notch on the side away from the connecting block, and the rotation limiting screw is disposed at the notch.

7. The angiography catheter tip spinning tool as described in claim 2, characterized in that, It also includes a micro-adjustment screw, one end of which is fixed to the base and the other end of which abuts against the connecting block.

8. The angiography catheter tip spinning tool as described in claim 2, characterized in that, It also includes an auxiliary handle, one end of which is disposed on the connecting block, and the other end of which is a free end suspended in the air.

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