A medical curved catheter forming device

Abstract

This invention relates to the technical field of medical catheter forming equipment, and more specifically, to a medical curved catheter forming equipment, comprising a traction mechanism for catheter traction; a mounting plate for placing the catheter and installing and fixing various forming components; a heat source for softening the catheter for bending; an inner forming roller assembly for contacting the inner side of the catheter and detachably mounted on the mounting plate; and an outer forming roller assembly for contacting the outer side of the catheter and detachably mounted on the mounting plate. The inner forming roller assembly is located inside the outer forming roller assembly, and an arc-shaped receiving space is formed between the inner forming roller assembly and the outer forming roller assembly, within which the catheter is placed. The medical curved catheter forming equipment of this invention allows for convenient adjustment of the curvature during catheter shaping, enabling the shaping of various curved structures and obtaining the desired medical curved catheter in a short time.

Description

Technical Field

[0001] This invention relates to the technical field of medical catheter forming equipment, and more specifically, to a medical curved catheter forming equipment. Background Technology

[0002] Currently, interventional medical catheters need to be shaped to better conform to tortuous blood vessels and reach the target lesion location, and to assist in selecting the corresponding target blood vessel for treatment. The distal end of the catheter has a special curved structure that allows the catheter to quickly reach the lesion area in the blood vessel, reducing the operation time for operators and patients and reducing potential clinical risks.

[0003] Currently, catheter shaping often uses molding molds with fixed curvature, which are then heat-set. Without determining the curvature of the bend, it is often necessary to modify the mold multiple times to obtain catheters with different bend structures for trial use. This greatly increases time and labor costs, and the solutions and experiments often cannot be verified and feedback is not timely. Summary of the Invention

[0004] The purpose of this invention is to overcome the inconvenience caused by the difficulty in adjusting the curvature of the mold during the bending and shaping process of existing medical catheters, and to provide a medical curved catheter forming device that can conveniently adjust the curvature during catheter shaping, realize the shaping of various curved structures, and obtain the required medical curved catheter in a short time.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0006] A medical curved catheter forming device is provided, including:

[0007] Traction mechanism, used for catheter traction;

[0008] Mounting plate, used to place conduits and install and fix various molded components;

[0009] A heat source is used to soften the conduit for bending and shaping.

[0010] The forming inner roller assembly is used to fit against the inner side of the guide tube and is detachably mounted on the mounting plate.

[0011] The outer forming roller assembly is used to fit against the outer side of the guide tube and is detachably mounted on the mounting plate.

[0012] The inner forming roller group is located inside the outer forming roller group, and an arc-shaped receiving space is formed between the inner forming roller group and the outer forming roller group, and the guide tube is placed in the receiving space.

[0013] The medical curved catheter forming device of the present invention is mainly used to bend and shape a pre-formed straight catheter to better conform to the tortuous blood vessels to reach the target lesion location, and to assist the treatment catheter in selecting the corresponding target blood vessel, quickly reaching the lesion area, reducing the operation time for the operator and the patient, and reducing potential clinical risks. Specifically, by cooperating with the forming inner roller group and the forming outer roller group, an arc-shaped receiving space for placing the catheter is formed between the forming inner roller group and the forming outer roller group. After the catheter is heated, a traction mechanism is used to pass the catheter through the arc-shaped receiving space, ultimately giving the catheter a curved shape that matches the curvature of the arc-shaped receiving space. Compared with the prior art, in the medical curved catheter forming equipment of the present invention, the forming inner roller group and the forming outer roller group are detachably connected to the mounting plate, and the mounting plate is used to fix both of them. Therefore, when it is necessary to adjust the curvature of the target catheter, it is only necessary to simply remove the forming inner roller group and the forming outer roller group from the mounting plate, and then adjust them according to the target curvature so that the curvature of the arc-shaped receiving space for placing the catheter formed between the forming inner roller group and the forming outer roller group matches the target curvature. There is no need for repeated mold repair and adjustment, which greatly saves time and labor costs and improves the production efficiency of medical curved catheters.

[0014] Furthermore, the inner forming roller group includes a plurality of first rollers and a first roller shaft arranged in sequence, and a plurality of first driving components for driving the first rollers to rotate. The first rollers are rotatably connected to the mounting plate through the first roller shafts. The axes of the plurality of first rollers are arranged along a first arc. The first driving components are connected to the first roller shafts. The outer forming roller group includes a plurality of second rollers and a second roller shaft arranged in sequence, and a plurality of second driving components for driving the second rollers to rotate. The second rollers are rotatably connected to the mounting plate through the second roller shafts. The axes of the plurality of second rollers are arranged along a second arc. The second driving components are connected to the second roller shafts. The second rollers are located outside the first rollers. The first arc and the second arc are concentrically arranged. A first roller is rotatably connected to the mounting plate via a first roller shaft. A first drive assembly drives the first roller shaft to rotate, facilitating catheter delivery. Multiple first roller shafts are arranged along a first arc, with the first rollers fitting against the inner side of the catheter to bend and shape the inner side. Similarly, a second roller is rotatably connected to the mounting plate via a second roller shaft. A second drive assembly drives the second roller shaft to rotate, facilitating catheter delivery. Multiple second roller shafts are arranged along a second arc, with the second rollers fitting against the outer side of the catheter to bend and shape the outer side. By controlling the curvature of the first and second arcs, the bending shape of the medical curved catheter can be controlled, thereby meeting usage requirements.

[0015] Furthermore, the shaft diameter of the first roller is smaller than that of the second roller, and / or the number of the first rollers is less than the number of the second rollers. These configurations facilitate simultaneous bending and forming of the outer and inner sides of the guide tube.

[0016] Furthermore, the outer periphery of the first roller is provided with a plurality of first shaping grooves, which are all uniformly arranged along the axial direction of the first roller; the outer periphery of the second roller is correspondingly provided with a plurality of second shaping grooves, which are all uniformly arranged along the axial direction of the second roller; the first shaping grooves and the second shaping grooves located at the same horizontal height form a shaping group for placing the conduit. Multiple shaping groups can be provided to realize the simultaneous bending and shaping of multiple conduits.

[0017] Furthermore, the mounting plate is provided with a plurality of first mounting holes arranged in a rectangular array. The spacing between two adjacent transverse first mounting holes is equal to the spacing between two adjacent longitudinal first mounting holes. Both the first roller and the second roller are inserted into the first mounting holes. The first mounting holes are used to install and fix the first roller and the second roller. The arrangement of multiple first mounting holes in rows and columns on the mounting plate facilitates adjustment of the curvature according to the required bending direction, allowing the first roller to be positioned along a first arc and the second roller to be positioned along a second arc. The first and second arcs can be made more flexible. Compared with mold shaping, this greatly reduces the waiting time and labor and material costs for adjusting the curved structure. Moreover, the medical curved catheter forming equipment of the present invention can be adjusted to bend structures of various specifications and different curvatures.

[0018] Furthermore, it also includes an adjustment mechanism for adjusting the fixed position of the first roller or the second roller relative to the mounting plate. The adjustment mechanism is installed between the first roller and the mounting plate, or between the second roller and the mounting plate. The first roller or the second roller passes through the adjustment mechanism and is inserted into the first mounting hole. The adjustment mechanism is used to fine-tune the installation position of the first roller or the second roller relative to the mounting plate, so that the first roller and / or the second roller can better adapt to the slight deformation of the guide tube during the traction and conveying process after heating, making the formed curved guide tube more uniform overall.

[0019] Furthermore, the adjustment mechanism includes an adjustment frame, an elastic element, a screw, and a slider with a hollow cavity. Both the slider and the elastic element are mounted within the adjustment frame. One end of the slider is connected to the elastic element, and the other end abuts against one end of the screw. The screw is threadedly connected to the adjustment frame and partially protrudes from it. The first roller or the second roller passes through the hollow cavity of the slider and is inserted into the first mounting hole. The slider can slide back and forth relative to the adjustment frame. By adjusting the position of the screw through the threaded connection between it and the adjustment frame, and simultaneously utilizing the force exerted on the slider by the elastic element, the slider's position relative to the adjustment frame can be adjusted. This, in turn, adjusts the position of the first roller or the second roller in the first mounting hole on the mounting plate, enabling fine-tuning of the local curvature of the first and second arcs, better adapting to the forming of the curved guide tube.

[0020] Furthermore, the adjustment mechanism is a limiting plate, which has multiple second mounting holes arranged in a rectangular array. The distance between two adjacent transverse second mounting holes is equal to the distance between two adjacent longitudinal second mounting holes, and the distance L2 between two adjacent transverse second mounting holes is less than the distance L1 between two adjacent transverse first mounting holes on the mounting plate. The diameter d2 of the second mounting hole is less than the diameter d1 of the first mounting hole. Utilizing the difference in diameter and density between the second and first mounting holes, the position of the first or second roller shaft within the first mounting hole can be fine-tuned through the second mounting hole. This allows for fine-tuning of the local curvature of the first and second arcs, better adapting to the forming of the curved guide tube.

[0021] Furthermore, the heat source is a heating rod disposed within the first and second roller shafts, or a hot air pipe disposed at the front end of the inner forming roller group and the outer forming roller group, or hot air. The heating rod allows for simultaneous bending and shaping during the heating and shaping process of the conduit, preventing the conduit from failing to shape in time after heating, thus affecting its shaping effect. The hot air pipe is another shaping method, preheating the conduit and then bending it through the inner and outer forming roller groups. Using hot air as a heat source has the advantage of being relatively simple to implement; it only requires placing the medical curved conduit forming device of this invention in a relatively enclosed space and heating it to a certain temperature. The disadvantage is that due to the large coverage area, more heat is required, and it is not easy to cool and shape after bending. All three heat source structures can achieve heating and shaping of the conduit, each with its own advantages.

[0022] Furthermore, it also includes several traction roller groups disposed at the front ends of the inner forming roller group and the outer forming roller group. Each traction roller group consists of two symmetrically arranged traction rollers, with a reserved space between the two traction rollers for the guide tube to pass through. The traction roller group facilitates the placement of the guide tube and its initial positioning, allowing the guide tube to smoothly pass through the inner forming roller group and the outer forming roller group under the traction of the traction mechanism to achieve bending and forming.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] The medical curved catheter forming equipment of this invention facilitates the design and control of catheter bending by adjusting the fixed positions of the inner and outer forming roller groups on the mounting plate. It allows for rapid verification of the curved structure's compliance with design requirements and enables timely structural adjustments for curved structures of any curvature and catheters of any size. Compared to molds with fixed shapes, this invention significantly reduces waiting time and labor and material costs associated with adjusting curved structures. Furthermore, the medical curved catheter forming equipment of this invention is applicable to multiple specifications and curved structures, and can replace molds used for preparing various curved structures, greatly reducing mold procurement and material management costs. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of a medical curved catheter forming device;

[0026] Figure 2 for Figure 1 A schematic diagram of the structure after removing the mounting plate and adjustment mechanism;

[0027] Figure 3 This is a schematic diagram of the mounting plate structure;

[0028] Figure 4 This is a schematic diagram of the assembly relationship of the adjustment mechanism in Example 1;

[0029] Figure 5 This is a schematic diagram of the adjustment mechanism in Example 1;

[0030] Figure 6 This is a schematic diagram of the structure of Embodiment 2 of a medical curved catheter forming device;

[0031] Figure 7 This is a schematic diagram of the adjustment mechanism in Example 2;

[0032] Figure 8 This is a schematic diagram of the forming inner roller assembly in Example 3;

[0033] Figure 9 This is a schematic diagram of the outer forming roller assembly in Example 3.

[0034] In the attached diagram: 1. Mounting plate; 11. First mounting hole; 2. Heat source; 3. Inner forming roller assembly; 31. First roller; 32. First roller shaft; 33. First shaping groove; 4. Outer forming roller assembly; 41. Second roller; 42. Second roller shaft; 421. Second shaping groove; 5. Adjustment mechanism; 51. Adjustment frame; 52. Elastic element; 53. Screw; 54. Slider; 55. Limiting plate; 551. Second mounting hole; 6. Pulling roller assembly; 61. Pulling roller; 7. Guide tube; d1 is the diameter of the first mounting hole; d2 is the diameter of the second mounting hole; L1 is the hole spacing of the first mounting hole; L2 is the hole spacing of the second mounting hole. Detailed Implementation

[0035] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only, representing schematic diagrams rather than actual physical objects, and should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0036] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present 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, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0037] Example 1

[0038] like Figures 1 to 5 As shown, this embodiment is a first embodiment of a medical curved catheter forming device, including...

[0039] Traction mechanism, used for traction of catheter 7;

[0040] Mounting plate 1 is used to place conduit 7 and to install and fix various molded components;

[0041] Heat source 2 is used to soften conduit 7 for bending and shaping;

[0042] The inner forming roller assembly 3 is used to fit the inner side of the guide tube 7 and can be detachably mounted on the mounting plate 1.

[0043] The outer forming roller assembly 4 is used to fit against the outer side of the guide tube 7 and can be detachably mounted on the mounting plate 1.

[0044] The inner forming roller group 3 is located inside the outer forming roller group 4, and an arc-shaped receiving space is formed between the inner forming roller group 3 and the outer forming roller group 4. The guide tube 7 is placed in the receiving space.

[0045] This invention preheats the conduit 7 to facilitate shaping, creating an arc-shaped receiving space between the inner forming roller group 3 and the outer forming roller group 4. The conduit 7 can be quickly bent and formed by placing it within this space. When the bending structure of the conduit 7 needs to be adjusted, the inner forming roller group 3 and the outer forming roller group 4 can be removed from the mounting plate 1 first. Then, their positions on the mounting plate 1 can be adjusted according to the required bending structure. The conduit 7 can then pass through the receiving space formed between the adjusted inner forming roller group 3 and the outer forming roller group 4, thus quickly forming a new bending structure for the conduit 7. This method is very simple, greatly improving the efficiency of the conduit 7 bending structure modification process and reducing modification costs.

[0046] In one embodiment, the inner forming roller group 3 includes a plurality of first rollers 31 and first roller shafts 32 arranged sequentially, and a plurality of first driving components for driving the first rollers 31 to rotate. The first rollers 31 are rotatably connected to the mounting plate 1 via the first roller shafts 32. The axes of the plurality of first rollers 31 are arranged along a first arc. The first driving components are connected to the first roller shafts 32. The outer forming roller group 4 includes a plurality of second rollers 41 and second roller shafts 42 arranged sequentially, and a plurality of second driving components for driving the second rollers 41 to rotate. The second rollers 41 are rotatably connected to the mounting plate 1 via the second roller shafts 42. The axes of the plurality of second rollers 41 are arranged along a second arc. The second driving components are connected to the second roller shafts 42. The second rollers 41 are located outside the first rollers 31. The first arc and the second arc are concentrically arranged. In this embodiment, both the first drive assembly and the second drive assembly can be drive motors, which drive the first roller shaft 32 and the second roller shaft 42 to rotate. Furthermore, a motor can be used to drive the chain to rotate, and sprockets are respectively set at the bottom of the first roller shaft 32 or the second roller shaft 42. The first drive assembly and the second drive assembly each use two motors, and the two motors correspond to two chains. The chains drive the sprockets to rotate, thereby realizing the rotation of the first roller shaft 32 or the second roller shaft 42. Within the knowledge of those skilled in the art, other structures can also be used to achieve the drive, including but not limited to lead screw and nut, gear rack, gear meshing, etc. By connecting the axes of multiple first roller shafts 32, a first arc can be obtained. Conversely, by pre-setting the first arc and then setting multiple first roller shafts 32 along the first arc, the first roller 31 can form the inner side of the curved structure. When the guide tube 7 is in contact with the multiple first rollers 31, the inner side of the guide tube 7 can be formed with the required curved structure. Similarly, by setting the second roller shaft 42 in accordance with the second arc and the second roller 41, the second roller 41 can form the outer side of the curved structure. When the guide tube 7 is in close contact with the second roller 41, the outer side of the guide tube 7 can be formed with the corresponding curved structure.

[0047] In one embodiment, the shaft diameter of the first roller 31 is smaller than that of the second roller 41. The arc length of the inner side of the curved guide tube 7 is shorter, so the shaft diameter of the first roller 31 located inside the curved structure of the guide tube 7 is set to be smaller than that of the second roller 41 located outside the curved structure of the guide tube 7, which is more conducive to the bending and forming of the guide tube 7.

[0048] In one implementation, the number of first rollers 31 is less than the number of second rollers 41. Similarly, since the inner arc length of the curved guide tube 7 is shorter, the number of first rollers 31 located inside the curved structure of the guide tube 7 is less than the number of second rollers 41 located outside the curved structure of the guide tube 7, thus satisfying the bending forming of the guide tube 7. Of course, the number of first rollers 31 and second rollers 41 is not limited. Without considering cost and given sufficient space, the more first rollers 31 and second rollers 41 the better, as this increases the contact area of ​​the guide tube 7 during bending forming, further improving the bending forming effect and resulting in a more uniform shape of the bent guide tube 7.

[0049] In one embodiment, the outer periphery of the first roller 31 is provided with a plurality of first shaping grooves 33, which are uniformly arranged along the axial direction of the first roller 31. Correspondingly, the outer periphery of the second roller 41 is provided with a plurality of second shaping grooves 421, which are also uniformly arranged along the axial direction of the second roller 41. The first shaping grooves 33 and second shaping grooves 421 at the same horizontal height form a shaping group for placing the guide tube 7. The guide tube 7 is typically circular, and correspondingly, the first shaping grooves 33 and second shaping grooves 421 are typically arc-shaped. Placing the guide tube 7 in the shaping group formed by the first shaping grooves 33 and second shaping grooves 421 at the same horizontal height facilitates the positioning and conveying of the guide tube 7, and consequently facilitates the bending and forming of the guide tube 7. Furthermore, by providing multiple first shaping grooves 33 on the first roller 31 and multiple second shaping grooves 421 on the second roller 41, it is advantageous to bend and form multiple guide tubes 7 at once, thereby improving production efficiency. During bending and shaping, multiple conduits 7 are arranged in parallel.

[0050] In one embodiment, the mounting plate 1 has a plurality of first mounting holes 11 arranged in a rectangular array. The spacing between two adjacent transverse first mounting holes 11 is equal to the spacing between two adjacent longitudinal first mounting holes 11. The first roller shaft 32 and the second roller shaft 42 are both inserted into the first mounting holes 11. In this embodiment, the spacing between two adjacent transverse first mounting holes 11 and the spacing between two adjacent longitudinal first mounting holes 11 are equal, which is the spacing L1 between the first mounting holes 11. The first mounting holes 11 are used to install and fix the first roller shaft 32 and the second roller shaft 42. The arrangement of a plurality of first mounting holes 11 in rows and columns on the mounting plate 1 facilitates the adjustment of the curvature according to the required bending curvature, so that the first roller shaft 32 is set along the first arc and the second roller shaft 42 is set along the second arc. The first arc and the second arc can be more flexible. Compared with mold shaping, it greatly reduces the waiting time and labor and material costs for adjusting the bending structure. Furthermore, the medical curved catheter 7 forming equipment of the present invention can be adjusted to bend structures of various specifications and different curvatures.

[0051] In one embodiment, an adjustment mechanism 5 is also included for adjusting the fixed position of the first roller 32 or the second roller 42 relative to the mounting plate 1. The adjustment mechanism 5 is installed between the first roller 31 and the mounting plate 1 or between the second roller 41 and the mounting plate 1. The first roller 32 or the second roller 42 passes through the adjustment mechanism 5 and is inserted into the first mounting hole 11. The adjustment mechanism 5 is used to fine-tune the installation position of the first roller 32 or the second roller 42 relative to the mounting plate 1, so that the first roller 32 and / or the second roller 42 can better adapt to the slight deformation of the guide tube 7 during the traction and conveying process after heating, making the formed curved guide tube 7 more uniform overall.

[0052] In one embodiment, the adjustment mechanism 5 includes an adjustment frame 51, an elastic element 52, a screw 53, and a slider 54 with a hollow cavity. Both the slider 54 and the elastic element 52 are installed inside the adjustment frame 51. One end of the slider 54 is connected to the elastic element 52, and the other end abuts against one end of the screw 53. The screw 53 is threadedly connected to the adjustment frame 51 and partially protrudes from the adjustment frame 51. The first roller shaft 32 or the second roller shaft 42 passes through the hollow cavity of the slider 54 and is inserted into the first mounting hole 11. The slider 54 can slide back and forth relative to the adjustment frame 51. By adjusting the position of the screw 53 through the threaded connection between the screw 53 and the adjustment frame 51, and simultaneously utilizing the force exerted by the elastic element 52 on the slider 54, the slider 54 can be adjusted relative to the adjustment frame 51, thereby adjusting the position of the first roller shaft 32 or the second roller shaft 42 in the first mounting hole 11 on the mounting plate 1. This allows for fine-tuning of the curvature of the first and second arcs, better adapting to the forming of the curved guide tube 7. One side of the adjusting frame 51 can be fixedly connected to the mounting plate 1, including but not limited to screw connection, bonding, welding, etc. When adjusting the curvature of the guide tube 7, it is possible that the position of one of the first roller shafts 32 or the second roller shaft 42 needs to be fine-tuned, or the positions of multiple first roller shafts 32 and / or multiple second roller shafts 42 need to be adjusted. Therefore, for ease of use, the present invention can be equipped with an adjusting mechanism at each first mounting hole 11; as long as the spacing of the first mounting holes 11 is set to meet the installation requirements of the adjusting mechanism. Of course, the adjusting mechanism can also be made to be detachably connected to the mounting plate 1, so that the adjusting mechanism can be added at the required position, which can save costs.

[0053] One embodiment also includes several traction roller groups 6 disposed at the front ends of the forming inner roller group 3 and the forming outer roller group 4. The traction roller group 6 consists of two symmetrically arranged traction rollers 61, with a reserved space between the two traction rollers 61 for the guide tube 7 to pass through. The traction roller group 6 facilitates the placement of the guide tube 7 and its initial positioning, allowing the guide tube 7 to smoothly pass through the forming inner roller group 3 and the forming outer roller group 4 under the traction of the traction mechanism to achieve bending and forming.

[0054] In one embodiment, the heat source 2 is a hot air duct located at the front end of the inner forming roller group 3 and the outer forming roller group 4. Alternatively, the hot air duct can be configured as another forming method, by preheating the guide tube 7 and then bending it through the inner forming roller group 3 and the outer forming roller group 4.

[0055] Example 2

[0056] like Figure 6 As shown, this embodiment is a second embodiment of a medical curved catheter 7 forming device. This embodiment is similar to the first embodiment, except that, as Figure 7 As shown, the adjustment mechanism is a limiting plate 55, which has multiple second mounting holes 551 arranged in a rectangular array. The spacing between two adjacent horizontal second mounting holes 551 is equal to the spacing between two adjacent vertical second mounting holes 551, and the spacing L2 is smaller than the spacing L1 between two adjacent first mounting holes 11 on the mounting plate 1. The diameter d2 of the second mounting hole 551 is smaller than the diameter d1 of the first mounting hole 11. In this embodiment, the spacing between two adjacent horizontal second mounting holes 551 is equal to the spacing between two adjacent vertical second mounting holes 551, which is the spacing L2 of the second mounting holes 551. By utilizing the difference in diameter and density between the second mounting holes 551 and the first mounting holes 11, the position of the first roller shaft 32 or the second roller shaft 42 in the first mounting hole 11 can be finely adjusted through the second mounting holes 551, thereby achieving fine adjustment of the curvature of the first arc and the second arc, and better adapting to the forming of the curved guide tube 7. The limiting plate 55 and the mounting plate 1 can be fixed with screws, which allows for the addition of adjustment mechanisms at the required locations, thus saving costs.

[0057] Example 3

[0058] This embodiment is a third embodiment of a medical curved catheter forming device. This embodiment is similar to Embodiment 1, except that, as shown in the following... Figure 8 and Figure 9 As shown, the heat source 2 is a heating rod disposed within the first roller shaft 32 and the second roller shaft 42. The heating rod is configured to bend and shape simultaneously during the heating and shaping process of the guide tube 7, thus preventing the guide tube 7 from failing to shape in time after heating, which would affect its shaping effect; moreover, the heating rod can make the guide tube 7 heat more evenly.

[0059] Example 4

[0060] This embodiment is the fourth embodiment of a medical curved catheter 7 forming device. This embodiment is similar to Embodiment 1, except that the heat source 2 is hot air. Using hot air as the heat source 2 has the advantage of being relatively simple to implement; it only requires placing the medical curved catheter 7 forming device of this invention in a relatively enclosed space and then heating it to a certain temperature. The disadvantage is that due to the large coverage area, more heat is required, and it is not easy to cool and solidify after bending. All three heat source structures 2 can achieve heating and shaping of the catheter 7, each with its own advantages.

[0061] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0062] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A medical curved catheter forming device, characterized in that, include Traction mechanism, used for traction of catheter (7); Mounting plate (1) is used to place conduit (7) and to install and fix various molded parts; A heat source (2) is used to soften the conduit (7) for bending and shaping; The forming inner roller group (3) is used to fit against the inner side of the guide tube (7) and can be detachably installed on the mounting plate (1). The outer forming roller assembly (4) is used to fit against the outside of the guide tube (7) and is detachably mounted on the mounting plate (1). The inner forming roller group (3) is located inside the outer forming roller group (4), and an arc-shaped receiving space is formed between the inner forming roller group (3) and the outer forming roller group (4), and the guide tube (7) is placed in the receiving space; The forming inner roller group (3) includes a plurality of first rollers (31) and first roller shafts (32) arranged in sequence, and also includes a plurality of first drive components for driving the first rollers (31) to rotate. The first rollers (31) are rotatably connected to the mounting plate (1) through the first roller shafts (32). The axes of the plurality of first rollers (31) are arranged along a first arc. The first drive components are connected to the first roller shafts (32). The forming outer roller group (4) includes a plurality of second rollers (41) and second roller shafts (42) arranged in sequence, and also includes a plurality of second drive components for driving the second rollers (41) to rotate. The second rollers (41) are rotatably connected to the mounting plate (1) through the second roller shafts (42). The axes of the plurality of second rollers (41) are arranged along a second arc. The second drive components are connected to the second roller shafts (42). The second rollers (41) are located outside the first rollers (31). The first arc and the second arc are concentrically arranged. The outer periphery of the first roller (31) is provided with a plurality of first shaping grooves (33), and the plurality of first shaping grooves (33) are uniformly arranged along the axial direction of the first roller (31); the outer periphery of the second roller (41) is provided with a plurality of second shaping grooves (421), and the plurality of second shaping grooves (421) are uniformly arranged along the axial direction of the second roller (41); the first shaping grooves (33) and the second shaping grooves (421) located at the same horizontal height form a shaping group for placing the guide tube (7); It also includes an adjustment mechanism (5) for adjusting the fixed position of the first roller (32) or the second roller (42) and the mounting plate (1). The adjustment mechanism (5) is installed between the first roller (31) and the mounting plate (1) or between the second roller (41) and the mounting plate (1). The mounting plate (1) is provided with a plurality of first mounting holes (11). The first roller (32) or the second roller (42) passes through the adjustment mechanism (5) and is inserted into the first mounting holes (11). It also includes several traction roller groups (6) arranged at the front end of the forming inner roller group (3) and the forming outer roller group (4). The traction roller group (6) consists of two symmetrically arranged traction rollers (61), and a placement space is reserved between the two traction rollers (61) for the guide tube (7) to pass through.

2. The medical curved catheter forming device according to claim 1, characterized in that, The shaft diameter of the first roller (31) is smaller than the shaft diameter of the second roller (41), and / or the number of the first roller (31) is smaller than the number of the second roller (41).

3. The medical curved catheter forming device according to claim 1 or 2, characterized in that, The first mounting holes (11) are arranged in a rectangular array, and the spacing between two adjacent horizontal first mounting holes (11) is equal to the spacing between two adjacent vertical first mounting holes (11); the first roller shaft (32) and the second roller shaft (42) are both inserted into the first mounting holes (11).

4. The medical curved catheter forming device according to claim 1, characterized in that, The adjustment mechanism (5) includes an adjustment frame (51), an elastic element (52), a screw (53), and a slider (54) with a hollow cavity. The slider (54) and the elastic element (52) are both installed in the adjustment frame (51). One end of the slider (54) is connected to the elastic element (52), and the other end abuts against one end of the screw (53). The screw (53) is threadedly connected to the adjustment frame (51) and partially protrudes from the adjustment frame (51). The first roller shaft (32) or the second roller shaft (42) passes through the hollow cavity of the slider (54) and is inserted into the first mounting hole (11). The slider (54) can slide back and forth relative to the adjustment frame (51).

5. The medical curved catheter forming device according to claim 1, characterized in that, The adjustment mechanism (5) is a limiting plate (55). The limiting plate (55) is provided with a plurality of second mounting holes (551). The second mounting holes (551) are arranged in a rectangular array. The distance between two adjacent horizontal second mounting holes (551) is equal to the distance between two adjacent vertical second mounting holes (551). The distance L2 between two adjacent horizontal second mounting holes (551) is less than the distance L1 between two adjacent horizontal first mounting holes (11) on the mounting plate (1). The diameter d2 of the second mounting hole (551) is less than the diameter d1 of the first mounting hole (11).

6. The medical curved catheter forming device according to claim 1, characterized in that, The heat source (2) is a heating rod disposed in the first roller (32) and the second roller (42), or the heat source (2) is a hot air pipe disposed at the front end of the inner forming roller group (3) and the outer forming roller group (4), or the heat source (2) is hot air.

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