Medical bent catheter forming equipment

Abstract

The invention relates to the technical field of medical catheter forming equipment, in particular to medical bent catheter forming equipment which comprises a traction mechanism used for catheter traction. The mounting plate is used for placing the guide pipe and mounting and fixing each formed part; the heat source is used for softening the guide pipe to be bent and formed; the forming inner roller set is used for being attached to the inner side of the guide pipe and is detachably arranged on the mounting plate; the forming outer roller set is used for being attached to the outer side of the guide pipe and is detachably arranged on the mounting plate; the forming inner roller set is located on the inner side of the forming outer roller set, an arc-shaped containing space is formed between the forming inner roller set and the forming outer roller set, and the guide pipe is placed in the containing space. According to the medical bent catheter forming equipment, the bent curvature during catheter shaping can be conveniently adjusted, shaping of various bent structures is achieved, and the needed medical bent catheter can be obtained within a short time.

Description

Technical Field

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

[0002] Currently, interventional medical catheters need to be shaped in order to better conform to tortuous blood vessels to reach the target lesion location and for auxiliary treatment catheters to select corresponding target blood vessels. The special curved structure at the distal end of the catheter enables the catheter to quickly reach the lesion area in the blood vessel, reducing the operation time for the operator and the patient and reducing potential clinical risks.

[0003] Currently, catheter shaping mostly uses a shaping mold with a fixed curvature, which is achieved through heat setting. When the curvature of the bend is not determined, it is often necessary to modify the mold multiple times to obtain catheters with different curved structures for trial use. This greatly increases the time and labor costs, and the plans and experiments often cannot be verified and fed back in a timely manner. Summary of the invention

[0004] The purpose of the present invention is to overcome the problem that the curvature of the bend of the mold cannot be adjusted during the bending and shaping process of the medical catheter in the prior art, resulting in inconvenience in processing, and to provide a medical curved catheter forming device that can conveniently adjust the curvature of the bend during catheter shaping, realize the shaping of various curved structures, and obtain the required medical curved catheter in a short time.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] Provided is a medical curved catheter forming device, comprising:

[0007] A traction mechanism, used for catheter traction;

[0008] Mounting plate, used to place the conduit and install and fix various molded parts;

[0009] A heat source to soften the conduit for bending and forming;

[0010] A forming inner roller set, used to fit the inner side of the conduit, and detachably mounted on the mounting plate;

[0011] A forming outer roller set, used to fit the outer side of the conduit, and detachably mounted on the mounting plate;

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

[0013] The medical curved catheter forming device of the present invention is mainly used to bend and shape a formed straight catheter so as 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 to quickly reach the lesion area, thereby reducing the operation time of the surgeon and the patient and reducing potential clinical risks. Specifically, the inner forming roller group and the outer forming roller group cooperate with each other, an arc-shaped accommodating space for placing the catheter is formed between the inner forming roller group and the outer forming roller group, and the catheter is heated and then passed through the arc-shaped accommodating space by a traction mechanism, so that the catheter finally obtains a curved shape consistent with the curvature of the arc-shaped accommodating space; compared with the prior art, in the medical curved catheter forming equipment of the present invention, the inner forming roller group and the outer forming roller group are respectively detachably connected to the mounting plate, and the mounting plate is used to fix the two respectively. Therefore, when it is necessary to adjust the curvature of the target catheter, it is only necessary to simply remove the inner forming roller group and the outer forming roller group from the mounting plate, and then adjust them according to the curvature of the target, so that the curvature of the arc-shaped accommodating space for placing the catheter formed between the inner forming roller group and the outer forming roller group is consistent with the curvature of the target; there is no need to repeatedly repair and adjust the mold, which greatly saves time and labor costs and improves the production efficiency of medical curved catheters.

[0014] Further, the inner forming roller group includes a plurality of first rollers and first roller shafts arranged in sequence, and also includes a plurality of first drive components for driving the first rollers to rotate, the first forming roller is rotatably connected to the mounting plate through the first roller shaft, the axes of the plurality of first rollers are arranged along a first arc, and the first drive component is connected to the first roller shaft; the outer forming roller group includes a plurality of second rollers and second roller shafts arranged in sequence, and also includes a plurality of second drive components for driving the second rollers to rotate, the second roller is rotatably connected to the mounting plate through the second roller shaft, the axes of the plurality of second rollers are arranged along a second arc, and the second drive component is connected to the second roller shaft; the second roller is located on the outside of the first roller; the first arc and the second arc are arranged concentrically. The first roller is rotatably connected to the mounting plate through the first roller, and the first driving assembly is used to drive the first roller to rotate, so as to facilitate the delivery of the catheter; multiple first rollers are arranged along the first arc, and the first roller fits the inner side of the catheter to bend the inner side of the catheter into shape; similarly, the second roller is rotatably connected to the mounting plate through the second roller, and the second driving assembly is used to drive the second roller to rotate, so as to facilitate the delivery of the catheter; multiple second rollers are arranged along the second arc, and the second roller fits the outer side of the catheter to bend the outer side of the catheter into shape; by controlling the curvature of the first arc and the second arc, the bending shape of the medical curved catheter can be controlled to meet the use requirements.

[0015] Furthermore, the shaft diameter of the first roller is smaller than the shaft diameter of the second roller, and / or the number of the first rollers is smaller than the number of the second rollers. The above configurations can facilitate the simultaneous bending of the outer side and the inner side of the catheter.

[0016] Furthermore, the outer circumference of the first roller is provided with a plurality of first shaping grooves, which are uniformly arranged along the axial direction of the first roller; the outer circumference of the second roller is correspondingly provided with a plurality of second shaping grooves, which are uniformly arranged along the axial direction of the second roller; the first shaping grooves and the second shaping grooves at the same level form a shaping group for placing the catheter. Multiple shaping groups can be provided to achieve simultaneous bending and forming of multiple catheters.

[0017] Furthermore, the mounting plate is provided with a plurality of first mounting holes, the first mounting holes are arranged along a rectangular array, and the spacing between two adjacent transverse first mounting holes is equal to the spacing between two adjacent longitudinal first mounting holes; the first roller and the second roller are both plugged into the first mounting hole. The first mounting hole is used to install and fix the first roller and the second roller. The plurality of first mounting holes are arranged in rows and columns on the mounting plate, which can be conveniently adjusted according to the required bending curvature so that the first roller is arranged along the first arc line and the second roller is arranged along the second arc line, and the first arc and the second arc can become more flexible. Compared with mold shaping, the waiting time for adjusting the curved structure and the labor and material costs are greatly reduced, and the medical curved catheter forming equipment of the present invention can be adjusted to be applicable to curved structures of different specifications and curvatures.

[0018] Furthermore, it also includes an adjustment mechanism for adjusting the fixed position of the first roller or the second roller and 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 plugged into the first mounting hole. The adjustment mechanism is used to achieve fine adjustment of the installation position of the first roller or the second roller and the mounting plate, so that the first roller and / or the second roller can better adapt to the micro-deformation of the catheter during the traction and transportation process after heating, so that the formed curved catheter is more uniform as a whole.

[0019] Furthermore, the adjustment mechanism includes an adjustment frame, an elastic member, a screw, and a slider with a hollow cavity. The slider and the elastic member are both installed in the adjustment frame. One end of the slider is connected to the elastic member, and the other end is in contact with one end of the screw. The screw is threadedly connected to the adjustment frame and partially protrudes from the adjustment frame. The first roller or the second roller passes through the hollow cavity of the slider and is plugged into the first mounting hole. The slider can slide back and forth relative to the adjustment frame. The position of the screw is adjusted by the threaded connection between the screw and the adjustment frame. At the same time, the force of the elastic member on the slider is used to adjust the position of the slider relative to the adjustment frame, thereby adjusting the position of the first roller or the second roller in the first mounting hole on the mounting plate, thereby achieving fine adjustment of the local bending curvature of the first arc and the second arc, and better adapting to the forming of the curved catheter.

[0020] Further, the adjustment mechanism is a limit plate, and a plurality of second mounting holes are provided on the limit plate. The second mounting holes are arranged along a rectangular array, and the spacing between two adjacent transverse second mounting holes is equal to the spacing between two adjacent longitudinal second mounting holes, and the spacing L2 is smaller than the spacing L1 between two adjacent first mounting holes on the mounting plate, and the aperture d2 of the second mounting hole is smaller than the aperture d1 of the first mounting hole. By utilizing the aperture difference and density difference between the second mounting hole and the first mounting hole, the position of the first roller or the second roller in the first mounting hole can be fine-tuned through the second mounting hole, so as to achieve fine-tuning of the first arc and the local bending curvature of the second arc, and better adapt to the forming of the curved conduit.

[0021] Furthermore, the heat source is a heating rod arranged inside the first roller and the second roller, or the heat source is a hot air pipe arranged at the front end of the inner forming roller group and the outer forming roller group, or the heat source is hot air. The setting of the heating rod can be performed by bending and forming simultaneously during the heating and shaping process of the catheter, so as to avoid the catheter being unable to be shaped in time after heating, thereby affecting its forming effect. The setting of the hot air pipe is another shaping method, which is to preheat the catheter and then bend and shape the catheter through the inner forming roller group and the outer forming roller group. The advantage of using hot air as a heat source is that it is relatively simple to implement. It only needs to place the medical curved catheter forming equipment of the present invention in a relatively closed space and then heat it to a certain temperature. The disadvantage is that due to the large range of distribution, more heat is required, and it is not easy to cool and shape after bending. The structures of the three heat sources can all achieve heating and shaping of the catheter, and each has its own advantages.

[0022] Furthermore, it also includes a plurality of pulling roller groups arranged at the front ends of the inner forming roller group and the outer forming roller group, wherein the pulling roller group is two symmetrically arranged pulling rollers, and a placement space for the catheter to pass through is reserved between the two pulling rollers. The pulling roller group can facilitate the placement of the catheter and facilitate its initial positioning, so that the catheter can be smoothly passed 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 present invention has the following beneficial effects:

[0024] The medical curved catheter forming device of the present invention can facilitate the curved design and control of the catheter by adjusting the fixed positions of the inner forming roller group and the outer forming roller group on the mounting plate, verifying that the curved structure meets the design requirements in a short time, and can timely adjust the structure of curved structures of any curvature and catheters of any size. Compared with the shaping mold with a fixed shape, the present invention greatly reduces the waiting time for adjusting the curved structure and the labor and material costs. Moreover, the medical curved catheter forming device of the present invention can be applied to multi-specification and multi-curved structures, and can replace molds prepared for various curved structures, greatly reducing the mold procurement cost and material management cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of a medical curved catheter forming device according to embodiment 1;

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

[0027] Figure 3 It is a structural schematic diagram of the mounting plate;

[0028] Figure 4 Schematic diagram of the assembly relationship of the adjustment mechanism of Example 1;

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

[0030] Figure 6 It is a structural schematic diagram of a second embodiment of a medical curved catheter forming device;

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

[0032] Figure 8 It is a structural schematic diagram of the forming inner roller group of Example 3;

[0033] Fig. 9 This is a schematic diagram of the structure of the forming outer roller group of Example 3.

[0034] In the accompanying drawings: 1. mounting plate; 11. first mounting hole; 2. heat source; 3. forming inner roller group; 31. first roller; 32. first roller shaft; 33. first shaping groove; 4. forming outer roller group; 41. second roller; 42. second roller shaft; 421. second shaping groove; 5. adjusting mechanism; 51. adjusting frame; 52. elastic member; 53. screw; 54. slider; 55. limit plate; 551. second mounting hole; 6. pulling roller group; 61. pulling roller; 7. guide tube; d1 is the aperture of the first mounting hole; d2 is the aperture of the second mounting hole; L1 is the hole distance of the first mounting hole; L2 is the hole distance of the second mounting hole. DETAILED DESCRIPTION

[0035] The present invention is further described below in conjunction with specific implementation methods. The accompanying drawings are only used for exemplary descriptions and are only schematic diagrams, not actual drawings, and cannot be understood as limiting this patent; in order to better illustrate the embodiments of the present invention, some parts of the accompanying drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the accompanying drawings may be omitted.

[0036] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0037] Embodiment 1

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

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

[0040] The mounting plate 1 is used to place the conduit 7 and to install and fix various molded parts;

[0041] A heat source 2 for softening the conduit 7 to be bent and formed;

[0042] The forming inner roller set 3 is used to fit the inner side of the conduit 7 and is detachably mounted on the mounting plate 1;

[0043] The outer forming roller set 4 is used to fit the outer side of the conduit 7 and is 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 accommodation space is formed between the inner forming roller group 3 and the outer forming roller group 4 , and the conduit 7 is placed in the accommodation space.

[0045] The present invention preheats the conduit 7 to facilitate shaping, so that an arc-shaped accommodation space is formed between the forming inner roller group 3 and the forming outer roller group 4, and the conduit 7 is placed in the accommodation space for rapid bending and shaping; when the bending structure of the conduit 7 needs to be adjusted, the forming inner roller group 3 and the forming outer roller group 4 can be first removed from the mounting plate 1, and then their positions on the mounting plate 1 are adjusted according to the required bending structure, and then the conduit 7 is passed through the accommodation space formed between the adjusted forming inner roller group 3 and the forming outer roller group 4, so that the conduit 7 with a new bending structure can be quickly formed, which is very simple and convenient, greatly improves the efficiency of the process of modifying the bending structure of the conduit 7, and also reduces the modification cost.

[0046] As one embodiment, 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 roller 31 to rotate, the first forming roller is rotatably connected to the mounting plate 1 through the first roller shaft 32, the axes of the plurality of first rollers 31 are arranged along the first arc, and the first drive component is connected to the first roller shaft 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 roller 41 to rotate, the second roller 41 is rotatably connected to the mounting plate 1 through the second roller shaft 42, the axes of the plurality of second rollers 41 are arranged along the second arc, and the second drive component is connected to the second roller shaft 42; the second roller 41 is located on the outside of the first forming roller; the first arc and the second arc are arranged concentrically. In this embodiment, the first drive assembly and the second drive assembly can both be drive motors, and the motors drive the first roller 32 and the second roller 42 to rotate; further, a motor can be used to drive the chain to rotate, and sprockets are respectively arranged at the bottom of the first roller 32 or the second roller 42. The first drive assembly and the second drive assembly respectively use two motors, and the two motors correspond to two chains. The chains are used to drive the sprockets to rotate to realize the rotation of the first roller 32 or the second roller 42; within the scope of knowledge of technical personnel in this field, driving can also be achieved through other structures, including but not limited to screw nuts, gear racks, and gears meshing with each other. The first arc can be obtained by connecting the axes of multiple first rollers 32. Conversely, by presetting the first arc and then arranging the multiple first rollers 32 along the first arc, the first roller 31 can form the inner side of the curved structure, and the conduit 7 can be respectively fitted with the multiple first rollers 31, so that the inner side of the conduit 7 can be formed into the required curved structure; similarly, the second roller 42 is correspondingly arranged with the second arc and the second roller 41, so that the second roller 41 can form the outer side of the curved structure, and after the conduits 7 are respectively fitted with the second rollers 41, the corresponding curved structure can be formed on the outer side of the conduit 7.

[0047] As one embodiment, the shaft diameter of the first roller 31 is smaller than the shaft diameter of the second roller 41. The arc length of the inner side of the curved conduit 7 is shorter, so the shaft diameter of the first roller 31 located on the inner side of the curved structure of the conduit 7 is set to be smaller than the shaft diameter of the second roller 41 located on the outer side of the curved structure of the conduit 7, which is more conducive to the bending of the conduit 7.

[0048] As one embodiment, the number of the first rollers 31 is less than the number of the second rollers 41. As in the above, since the arc length of the inner side of the curved conduit 7 is shorter, the number of the first rollers 31 located on the inner side of the curved structure of the conduit 7 is set to be less than the number of the second rollers 41 located on the outer side of the curved structure of the conduit 7, which can meet the bending forming of the conduit 7. Of course, the number of the first rollers 31 and the second rollers 41 is not limited. If the cost is not considered and the space allows, the more the number of the first rollers 31 and the second rollers 41 is set, the better, so that the contact surface of the conduit 7 during bending forming is larger, the bending forming effect of the conduit 7 can be improved, and the shape of the conduit 7 after bending is more uniform.

[0049] As one embodiment, the outer circumference 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 circumference of the second roller 41 is correspondingly 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 level form a shaping group for placing the catheter 7. The catheter 7 is usually circular, and accordingly, the first shaping grooves 33 and the second shaping grooves 421 are also usually arranged in an arc shape. Placing the catheter 7 in the shaping group for placing the catheter 7 formed by the first shaping grooves 33 and the second shaping grooves 421 located at the same level is conducive to the positioning and transportation of the catheter 7, and further conducive to the bending and forming of the catheter 7. Moreover, by providing a plurality of first shaping grooves 33 on the first roller 31 and a plurality of second shaping grooves 421 on the second roller 41, it is conducive to bending and forming a plurality of catheters 7 at one time, which can improve production efficiency. During the bending process, a plurality of conduits 7 are arranged in parallel.

[0050] As one embodiment, a plurality of first mounting holes 11 are provided on the mounting plate 1, and the first mounting holes 11 are arranged along a rectangular array, and 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 32 and the second roller 42 are both plugged into the first mounting holes 11. In this embodiment, the spacing between two adjacent transverse first mounting holes 11 is equal to the spacing between two adjacent longitudinal first mounting holes 11, 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 32 and the second roller 42, and a plurality of first mounting holes 11 are arranged in rows and columns on the mounting plate 1, which can be conveniently adjusted according to the required bending curvature so that the first roller 32 is arranged along the first arc line, and the second roller 42 is arranged along the second arc line, and the first arc and the second arc can become more flexible, which greatly reduces the waiting time for adjusting the curved structure and the labor and material costs compared to mold shaping, and can be adjusted. The medical curved catheter 7 forming equipment of the present invention is suitable for curved structures of different specifications and curvatures.

[0051] As one embodiment, 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 first roller 32 or the second roller 42 passes through the adjustment mechanism 5 and is plugged into the first mounting hole 11. The adjustment mechanism 5 is used to achieve fine adjustment of the installation position of the first roller 32 or the second roller 42 and the mounting plate 1, so that the first roller 32 and / or the second roller 42 can better adapt to the micro deformation of the catheter 7 during the traction and transportation process after heating, so that the formed curved catheter 7 is more uniform as a whole.

[0052] As one embodiment, the adjustment mechanism 5 includes an adjustment frame 51, an elastic member 52, a screw 53, and a slider 54 with a hollow cavity. The slider 54 and the elastic member 52 are both installed in the adjustment frame 51. One end of the slider 54 is connected to the elastic member 52, and the other end is abutted 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 32 or the second roller 42 passes through the hollow cavity of the slider 54 and is plugged into the first mounting hole 11. The slider 54 can slide back and forth relative to the adjustment frame 51. The position of the screw 53 is adjusted by the threaded connection between the screw 53 and the adjustment frame 51. At the same time, the force of the elastic member 52 on the slider 54 is used to adjust the position of the slider 54 relative to the adjustment frame 51, thereby adjusting the position of the first roller 32 or the second roller 42 in the first mounting hole 11 on the mounting plate 1, so as to achieve fine adjustment of the local bending curvature of the first arc and the second arc, and better adapt to the forming of the curved conduit 7. One side of the adjustment frame 51 can be fixedly connected to the mounting plate 1, including but not limited to being realized by screw connection, bonding, welding and the like. When adjusting the curvature of the conduit 7, it is possible that the position of a first roller 32 or a second roller 42 needs to be fine-tuned, or it is possible that the positions of multiple first rollers 32 and / or multiple second rollers 42 need to be adjusted. Therefore, for ease of use, the present invention can be equipped with an adjustment mechanism at each first mounting hole 11; as long as the spacing of the first mounting holes 11 is set to meet the installation of the adjustment mechanism. Of course, the adjustment mechanism can also be made detachably connected to the mounting plate 1, so that the adjustment mechanism can be installed at the required position, which can save costs.

[0053] As one embodiment, it further includes a plurality of pulling roller groups 6 disposed at the front ends of the inner forming roller group 3 and the outer forming roller group 4. The pulling roller group 6 is two symmetrically disposed pulling rollers 61, and a placement space for the catheter 7 to pass through is reserved between the two pulling rollers 61. The pulling roller group 6 can facilitate the placement of the catheter 7 and facilitate its initial positioning, so that the catheter 7 can be smoothly passed through the inner forming roller group 3 and the outer forming roller group 4 under the traction of the traction mechanism to achieve bending forming.

[0054] As one embodiment, the heat source 2 is a hot air pipe arranged at the front end of the forming inner roller group 3 and the forming outer roller group 4. The setting of the hot air pipe is another shaping method, by preheating the conduit 7, and then making the conduit 7 pass through the forming inner roller group 3 and the forming outer roller group 4 to bend and shape.

[0055] Embodiment 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 Figure 7 As shown, the adjustment mechanism is a limit plate 55, and a plurality of second mounting holes 551 are provided on the limit plate 55. The second mounting holes 551 are arranged in a rectangular array, and the spacing between two adjacent transverse second mounting holes 551 is equal to the spacing between two adjacent longitudinal 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, and the aperture d2 of the second mounting hole 551 is smaller than the aperture d1 of the first mounting hole 11. In this embodiment, the spacing between two adjacent transverse second mounting holes 551 is equal to the spacing between two adjacent longitudinal second mounting holes 551, that is, the spacing L2 of the second mounting holes 551; by using the aperture difference and density difference between the second mounting hole 551 and the first mounting hole 11, the position of the first roller 32 or the second roller 42 in the first mounting hole 11 can be fine-tuned through the second mounting hole 551, so as to achieve fine-tuning of the first arc line and the local bending curvature of the second arc, so as to better adapt to the forming of the curved conduit 7. The limiting plate 55 and the mounting plate 1 can be fixed by screws, so that an adjustment mechanism can be installed at a required position, which can save costs.

[0057] Embodiment 3

[0058] This embodiment is a third embodiment of a medical curved catheter 7 forming device. This embodiment is similar to the first embodiment, except that Figure 8 and Fig. 9 As shown, the heat source 2 is a heating rod disposed in the first roller 32 and the second roller 42. The setting of the heating rod can be performed by bending and forming the conduit 7 synchronously during the heating and shaping process, so as to avoid the conduit 7 being unable to be shaped in time after heating, thereby affecting its shaping effect; moreover, the setting of the heating rod can make the conduit 7 more evenly heated.

[0059] Embodiment 4

[0060] This embodiment is the fourth embodiment of a medical curved catheter 7 molding device. This embodiment is similar to the first embodiment, except that the heat source 2 is hot air. The advantage of using hot air as the heat source 2 is that it is relatively simple to implement. It only requires placing the medical curved catheter 7 molding device of the present invention in a relatively closed space and then heating it to a certain temperature. The disadvantage is that due to the large range of distribution, more heat is required, and it is not easy to cool and shape after bending. The structures of the three heat sources 2 can all achieve heating and shaping of the catheter 7, and each has its own advantages.

[0061] In the specific contents of the above-mentioned specific implementation methods, the various technical features can be combined in any non-contradictory manner. In order to make the description concise, not all possible combinations of the above-mentioned technical features are described. However, as long as there is no contradiction in the combination of these technical features, they 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 embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A medical curved catheter forming device, characterized in that: include A traction mechanism, used for traction of the catheter (7); A mounting plate (1) for placing the conduit (7) and mounting and fixing various molded parts; A heat source (2) for softening the conduit (7) to be bent and formed; A forming inner roller group (3), used for fitting with the inner side of the conduit (7), and detachably mounted on the mounting plate (1); A forming outer roller group (4), used for fitting with the outer side of the conduit (7), and 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 accommodation space is formed between the inner forming roller group (3) and the outer forming roller group (4), and the conduit (7) is placed in the accommodation space.

2. The medical curved catheter forming device according to claim 1, characterized in that: The inner forming roller group (3) comprises a plurality of first rollers (31) and first roller shafts (32) arranged in sequence, and also comprises a plurality of first driving assemblies for driving the first rollers (31) to rotate, the first forming rollers are rotatably connected to the mounting plate (1) via the first roller shaft (32), the axes of the plurality of first rollers (31) are arranged along a first arc, and the first driving assembly is connected to the first roller shaft (32); the outer forming roller group (4) comprises a plurality of second rollers (41) and second roller shafts (42) arranged in sequence, and also comprises a plurality of second driving assemblies for driving the second rollers (41) to rotate, the second rollers (41) are rotatably connected to the mounting plate (1) via the second roller shaft (42), the axes of the plurality of second rollers (41) are arranged along a second arc, and the second driving assembly is connected to the second roller shaft (42); the second rollers (41) are located outside the first rollers (31); the first arc and the second arc are arranged concentrically.

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

4. The medical curved catheter forming device according to claim 2, characterized in that: The outer circumference 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 circumference of the second roller (41) is correspondingly 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 a catheter (7).

5. The medical curved catheter forming device according to any one of claims 2 to 4, characterized in that: The mounting plate (1) is provided with a plurality of first mounting holes (11), the first mounting holes (11) being arranged in a rectangular array, the spacing between two adjacent transverse first mounting holes (11) being 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 plugged into the first mounting holes (11).

6. The medical curved catheter forming device according to claim 5, characterized in that: 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 first roller (32) or the second roller (42) passes through the adjustment mechanism (5) and is plugged into the first mounting hole (11).

7. The medical curved catheter forming device according to claim 6, characterized in that: The adjusting mechanism (5) comprises an adjusting frame (51), an elastic member (52), a screw (53), and a slider (54) provided with a hollow cavity. The slider (54) and the elastic member (52) are both installed in the adjusting frame (51). One end of the slider (54) is connected to the elastic member (52), and the other end is in contact with one end of the screw (53). The screw (53) is threadedly connected to the adjusting frame (51) and partially protrudes from the adjusting frame (51). The first roller (32) or the second roller (42) passes through the hollow cavity of the slider (54) and is plugged into the first mounting hole (11). The slider (54) can slide back and forth relative to the adjusting frame (51).

8. The medical curved catheter forming device according to claim 6, characterized in that: The adjustment mechanism (5) is a limit plate (55), and a plurality of second mounting holes (551) are provided on the limit plate (55). The second mounting holes (551) are arranged along a rectangular array, and the spacing between two adjacent transverse second mounting holes (551) is equal to the spacing between two adjacent longitudinal 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), and the aperture d2 of the second mounting hole (551) is smaller than the aperture d1 of the first mounting hole (11).

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

10. The medical curved catheter forming device according to claim 1, characterized in that: It also includes a plurality of pulling roller groups (6) arranged at the front ends of the inner forming roller group (3) and the outer forming roller group (4), wherein the pulling roller group (6) is two symmetrically arranged pulling rollers (61), and a placement space for the conduit (7) to pass through is reserved between the two pulling rollers (61).

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