Medical catheter platinum-iridium ring assembly device based on elastic stretching

Abstract

This invention relates to the field of platinum-iridium ring assembly technology, and in particular to a medical catheter platinum-iridium ring assembly device based on elastic tension. The device includes a worktable and clamps for holding both ends of the catheter body. The outer side of the catheter body is used to fit the platinum-iridium ring. It also includes a back plate, which is located on the back of the worktable. The back plate has a slide rail, which includes a straight rail and a curved rail that are interconnected. A feeding clamp for feeding the platinum-iridium ring is slidably mounted on the slide rail. A tensioning assembly is also included, which is adjustable and movable above the front of the worktable. The tensioning assembly includes a tension clamp and upper and lower positioning clamps. This invention utilizes the elastic rebound of the catheter material to achieve reliable interference fit and locking of the ring. Stable fixation can be achieved with only a small stroke of rolling or crimping, avoiding the problems of ellipticization of the inner lumen and local flattening caused by traditional large deformation crimping.

Description

Technical Field

[0001] This invention relates to the field of platinum-iridium ring assembly, and more particularly to a medical catheter platinum-iridium ring assembly device based on elastic tension. Background Technology

[0002] Medical catheters are widely used in cardiovascular intervention, neurointervention and other fields. In order to accurately identify the distal position of the catheter under fluoroscopic conditions, platinum-iridium contrast rings are usually installed on the catheter body. Currently, closed platinum-iridium metal rings are mostly used, with an inner diameter slightly larger than the outer diameter of the catheter. The contrast rings are inserted one by one from the distal end face of the catheter, and then pushed to the target position along the catheter axis by manual or simple mechanical device. Subsequently, radial pressing, forging or rolling tools are used to plastically deform the contrast rings so that they are engaged with the outer wall of the catheter to achieve fixation. However, the above assembly process still has significant shortcomings in the existing technology: First, when the imaging ring is pushed a long distance on the outer surface of the catheter, the gap between the ring and the catheter is small and it is a dry friction contact. In order to overcome the friction, a large axial thrust is required, which can easily cause the outer surface of the catheter, especially the hydrophilic coating, to be scratched, roughened, or even wrinkled or bulged in some places, affecting the patency and mechanical properties of the catheter; Second, the position of the imaging ring is mostly determined by a ruler or manual visual inspection, which has a large cumulative error. It is difficult to keep the spacing between multiple imaging rings and the distance from the catheter tip stable and consistent; Third, in order to ensure that there is no relative slippage between the imaging ring and the catheter, the traditional crimping or forging process usually requires a large radial compression of the imaging ring, which can easily cause the inner cavity of the catheter to become elliptical, locally flattened, or cracked, which is not conducive to the assembly quality control of small-diameter and thin-walled catheters; In addition, the current assembly process is generally completed in segments and by separate machines. The common practice is to first put the platinum-iridium ring into the end of the guide tube at the loading station and roughly push it to the estimated position. Then, the guide tube is initially positioned and fixed by a simple pressure head or clamp. Finally, the entire guide tube is transferred to a special rolling mill or forging press to complete the final radial rolling forming. However, the catheters need to be manually or mechanically handled, clamped, and repositioned multiple times between workstations. On the one hand, this increases the number of operation steps and production cycle time, reducing the overall assembly efficiency. On the other hand, during the transfer and re-clamping process, the catheters are inevitably subjected to bending, vibration, or pulling. The pre-positioned developing rings are prone to slight axial displacement or angular deflection, leading to the accumulation of final positional deviations, which affects product yield and the consistency of the spacing between multiple developing rings. Summary of the Invention

[0003] The purpose of this invention is to solve the problems in the prior art, such as the high friction of the platinum-iridium ring pushing, which easily damages the catheter surface, and the easy displacement of the imaging ring during the process of process dispersion and transportation, which affects the assembly efficiency and yield. Therefore, this invention proposes a medical catheter platinum-iridium ring assembly device based on elastic tension.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a medical catheter platinum-iridium ring assembly device based on elastic tension, comprising a worktable and clamps for holding both ends of the catheter body, wherein a platinum-iridium ring is fitted onto the outer side of the catheter body, and further comprising: A back plate is disposed on the back of the workbench above it. The back plate is provided with a slide rail, which includes a straight rail and a curved rail that are connected to each other. A feeding clamp for feeding platinum-iridium rings is slidably disposed on the slide rail. A stretching assembly is adjustablely and movable above the front of the workbench. The stretching assembly includes a stretching clamp and upper and lower positioning clamps. The stretching clamp has two clamps for holding the position of the platinum-iridium ring to be installed on the catheter body. The two stretching clamps move synchronously in opposite directions. The upper and lower positioning clamps are located at the center of the two stretching clamps and are used to fix the platinum-iridium ring to the catheter body. A positioning shaft is inserted inside the conduit body. C-shaped rings are fitted at both ends of the conduit body. The clamps are held on the outside of the C-shaped rings. Two clamps are provided at the feeding end of the conduit body. The feeding tray is disposed on the back plate of the feeding end of the guide tube body.

[0005] Preferably, the curved rail has a C-shaped structure, the curved rail is connected to both ends of the straight rail, the straight rail is connected to an extension rail near the feeding end, the extension rail is switchably connected to the straight rail and the curved rail, the straight rail and the extension rail are on the same straight line and flush with the central axis of the guide tube body, the end face of the straight rail at the feeding end is set away from the feeding support, the end face of the extension rail extends to the feeding support, and a pressure sensor is provided on the inner wall of the end face of the extension rail away from the straight rail; The feeding clamp's trajectory is as follows: it first enters the extended rail from the curved rail near the feeding end. During the process of entering the extended rail, the feeding clamp moves from top to bottom until it is horizontal with the feeding tray. At this time, the clamping end of the feeding clamp has not yet extended to the position of the feeding tray. It continues to move within the extended rail, and the feeding clamp gradually approaches the feeding tray. Its clamping end extends into the interior of the platinum-iridium ring end face on the feeding tray, clamps it, and continues to move until the feeding clamp triggers the pressure sensor within the extended rail. At this time, the feeding clamp moves in the opposite direction within the extended rail, and the channel switches to connect the extended rail and the straight rail. The feeding clamp, carrying the platinum-iridium ring, moves along the straight rail until the platinum-iridium ring is fitted onto the corresponding position on the guide tube body. After the feeding clamp releases the platinum-iridium ring, it continues to move at a constant speed on the straight rail, then enters the curved rail and moves into the extended rail again. This cycle repeats continuously.

[0006] Preferably, a rack is provided at one end of the inner wall of the slide rail, a first gear is rotatably provided on the feeding clamp, the first gear meshes with the rack, a motor rail is provided at the center of the slide rail, a first motor is slidably provided in the motor rail, and the output end of the first motor is linked with the first gear. By driving the first motor to rotate the first gear, the first gear can be displaced within the slide rail due to its meshing with the rack. When the loading clamp triggers the pressure sensor within the extension rail, the first motor flips and drives the loading clamp to move in the opposite direction within the extension rail.

[0007] Preferably, a switching plate is provided at the connection between the straight rail and the extended rail and the curved rail. The switching plate is rotatably disposed at the connection between the straight rail and the extended rail via a coil spring. An assembly groove for fitting the switching plate is provided on the straight rail. The switching plate is arranged in an arc shape, and the upper end of the switching plate extends to the edge of the switching opening above the straight rail. In the initial state, the coil spring drives the switching plate to be in a tilted state, which can ensure that the switching plate completely cuts off the connection between the straight rail and the extension rail. In conjunction with the first motor sliding in the motor rail, the loading clamp moving down from the curved rail can only enter the extension rail. Subsequently, when moving in the reverse direction, the first gear squeezes the switching plate to rotate into the assembly slot and retracts. The first gear can then move normally into the straight rail.

[0008] Preferably, the feeding clamp includes a fixed frame, a right-angle clamp, a first bidirectional lead screw, and a second motor. The fixed frame has a rotating block rotatably mounted on its back. The first gear is linked to the rotating block. The first bidirectional lead screw is rotatably mounted inside the fixed frame. Two right-angle clamps are provided and arranged symmetrically above and below each other. One end of the right-angle clamp is threaded onto the first bidirectional lead screw, and the other end is used to extend to the inner wall of the platinum-iridium ring. The end face of the first bidirectional lead screw is driven to rotate by the second motor. A counterweight is provided at the lower end of the fixed frame. The counterweight is used to increase the weight at the bottom of the fixing frame, keeping the loading clamp in a vertical position during movement and avoiding affecting the clamping effect.

[0009] Preferably, the feeding tray is assembled and connected to the back plate through a support frame, and an end plate is provided at the end of the feeding tray away from the guide tube body. A push plate is provided on the inner side of the end plate through a cylinder. Place the platinum-iridium ring to be installed on the feeding tray. Drive the cylinder to move the push plate towards the guide tube body, which can push the platinum-iridium ring a certain distance to facilitate feeding with the feeding clamp.

[0010] Preferably, a first slide groove is provided above the worktable, a first lead screw is rotatably provided in the first slide groove, a first slider is slidably provided in the first slide groove, the first slider is threadedly sleeved on the first lead screw, the first lead screw is driven to rotate by a third motor, a slide seat is provided above the first slider, a second bidirectional lead screw is rotatably provided inside the slide seat, the second bidirectional lead screw is driven to rotate by a fourth motor, second sliders are symmetrically threaded at both ends of the second bidirectional lead screw, the second slider is assembled and connected to a stretching clamp via a first bracket above it, and the center position of the slide seat is assembled and connected to upper and lower positioning clamps via a second bracket, the clamping method of the stretching clamp is the same as the clamping method of the feeding clamp; When adjusting the overall position of the stretching assembly, the third motor drives the first lead screw to rotate, which in turn causes the first slider to move relative to the long platform and adjust to a suitable angle, that is, the position of the upper and lower positioning clamps is the upper ring position on the guide tube body.

[0011] Preferably, the upper and lower positioning clamps include an upper support ring, a lower support ring, and a rolling assembly. The lower support ring is disposed on the upper end of the second bracket. One end of the upper support ring is rotatably connected to the lower support ring via a rotating shaft. The rolling assembly is disposed on the upper and lower support rings and is used to roll and position the platinum-iridium ring and the conduit body. One end of the rotating shaft is driven to rotate by a motor. The motor is disposed on the second bracket. The inner arc surfaces of the upper and lower support rings are provided with limiting grooves adapted to the platinum-iridium ring. The limiting groove in the lower support ring is connected to the outside at the feeding end. The motor drives the upper support ring to rotate relative to the lower support ring and open. The feeding clamp then drives the platinum-iridium ring into the lower support ring. After entering the limiting groove of the lower support ring, the limiting groove is connected to the outside near the feeding end, while the other end is closed. During the movement, the end face of the platinum-iridium ring is blocked by the lower support ring and cannot leave the limiting groove.

[0012] Preferably, the rolling mechanism includes rolling wheels and inclined rails. Four inclined rails are provided, arranged in pairs at equal distances on the outer sides of the upper and lower support rings. The extension lines of the four inclined rails intersect at the center of the upper and lower positioning clamps. The rolling wheels rotate at both ends and slide on the inner sides of the inclined rails. The upper and lower support rings each have through slots for the rolling wheels to pass through. The end face of the rolling wheel is driven to rotate by a motor. Fixed blocks are provided at the center of the outer sides of the upper and lower support rings. A telescopic shaft is rotatably provided on the end face of the rolling wheel. The other end of the telescopic shaft is rotatably mounted on a corresponding fixed block. The end faces of two adjacent telescopic shafts on the upper and lower support rings are meshed by a second gear. An end shaft is rotatably provided on the end face of the rotating shaft. The end shaft meshes with one of the first gears on each of the upper and lower support rings via a belt. The end shaft is driven to rotate by a second motor. The motor drives the rotation of the second gear on the upper and lower support rings, which in turn drives all the telescopic shafts to rotate around the corresponding second gear. This causes the rolling roller at the other end of the telescopic shaft to slide on the inclined rail, thereby adjusting the pressure of the rolling roller on the platinum-iridium ring. This achieves the effect of gradually rolling the platinum-iridium ring to firmly fix it to the conduit body.

[0013] Preferably, the worktable is provided with a second slide groove, and a fourth slider is symmetrically slidably arranged in the second slide groove. The clamps located at both ends are respectively arranged on the two fourth sliders. The two fourth sliders move synchronously in opposite directions, and the moving structure is the same as the synchronous reverse sliding structure of the tension clamp in the slide. The clamping structure of the clamp is the same as the clamping structure of the tension clamp.

[0014] Compared with the prior art, the present invention has the following beneficial effects: This invention achieves a temporary reduction in the outer diameter of the catheter by implementing controllable axial elastic stretching within a predetermined area of ​​the catheter body. Under this reduced diameter state, the platinum-iridium ring is pushed and its position adjusted. The fit between the ring and the catheter changes from a tight fit to an approximate clearance fit or a slight interference fit, thereby significantly reducing the frictional resistance during the pushing process. Compared with the prior art, which pushes the catheter over a long distance using dry friction on the surface of the original outer diameter catheter, this invention can effectively reduce the required axial thrust, reduce the risk of scratches, abrasions, or local bulges on the outer surface of the catheter and the hydrophilic coating, and help maintain the integrity of the outer surface of the catheter and the patency of the inner lumen. This invention maintains the catheter body horizontally without collapsing by using a fixed axis, and with the help of a precisely adjustable tensioning component, the platinum-iridium ring is adjusted in a small stroke position during the diameter reduction state. After the tension is released, the springback of the catheter locks the platinum-iridium ring in the target position. Finally, with the help of the rolling mechanism set on the upper and lower positioning rings, the platinum-iridium ring is rolled and fixed without transferring the positioned catheter and platinum-iridium ring. This reduces the probability of axial displacement or angular deflection of the imaging ring due to bending, vibration or pulling during the transfer process, thereby improving the assembly yield and the consistency of the spacing between multiple imaging rings. This invention utilizes the elastic rebound properties of catheter materials. When tension is released, the radial interference generated by the recovery of the catheter's outer diameter serves as the main locking force for the imaging ring. Reliable fixation can be achieved simply by combining it with short-stroke, low-load rolling or pressing shaping. Compared to existing technologies that rely on large deformation pressing or forging to force the imaging ring into the catheter's outer wall, this invention significantly reduces the radial compression of the imaging ring, lowering the risk of catheter lumen ellipticization, local flattening, and inner lining cracking. It is particularly suitable for assembling medical catheters with small outer diameters, thin-walled structures, and multi-layered composite structures. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0016] Figure 2 This is a schematic diagram of the feeding section of the present invention.

[0017] Figure 3 For the present invention Figure 2 Enlarged schematic diagram of the structure at point A in the middle.

[0018] Figure 4 This is a schematic diagram of the tensioning component structure of the present invention.

[0019] Figure 5 This is a schematic diagram of the upper and lower positioning clamp structure of the present invention.

[0020] Figure 6 This is a schematic diagram of the rolling roller structure of the present invention.

[0021] Figure 7 This is a schematic diagram of the back plate and feeding clamp structure of the present invention.

[0022] Figure 8 For the present invention Figure 7 Enlarged schematic diagram of the structure at point B.

[0023] In the diagram: 1. Workbench; 2. Conduit body; 3. Platinum-iridium ring; 4. Back plate; 5. Slide rail; 511. Straight rail; 512. Curved rail; 513. Loading clamp; 514. Extension rail; 521. Pressure sensor; 6. Fixture; 711. Tension clamp; 712. Upper and lower positioning clamps; 8. Positioning shaft; 9. C-ring; 10. Loading support; 111. Rack; 112. First gear; 113. Motor rail; 114. First motor; 121. Switching plate; 122. Assembly slot; 131. Fixing frame; 132. Right angle clamp; 133. First bidirectional lead screw; 134. Second motor; 135. Rotating block; 136. Counterweight block; 141. Support frame; 142. End plate; 143. Cylinder; 144. Push plate; 152. First slide groove; 153. First lead screw; 154. First slider; 155. Third motor; 156. Slide block; 157. Second double-acting lead screw; 158. Fourth motor; 159. Second slider; 160. First bracket; 161. Second bracket; 211. Upper support ring; 212. Lower support ring; 213. Rotating shaft; 214. Motor 1; 215. Limiting groove; 221. Rolling roller; 222. Inclined rail; 224. Through groove; 225. Motor; 226. Fixing block; 227. Telescopic shaft; 228. Second gear; 229. End shaft; 230. Motor 2; 311. Second slide groove; 312. Fourth slider. Detailed Implementation

[0024] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0025] like Figures 1 to 8 The illustrated medical catheter platinum-iridium ring assembly device based on elastic tension includes a worktable 1 and clamps 6 for holding both ends of the catheter body 2. A platinum-iridium ring 3 is fitted onto the outer side of the catheter body 2. The device also includes: Back plate 4 is set on the back of the workbench 1. Back plate 4 is provided with slide rail 5. Slide rail 5 includes a straight rail 511 and a curved rail 512 that are connected to each other. A feeding clamp 513 for feeding platinum-iridium ring 3 is slidably provided on slide rail 5. The tensioning assembly is adjustable and movable above the front of the workbench 1. The tensioning assembly includes a tensioning clamp 711 and an upper and lower positioning clamp 712. The tensioning clamp 711 has two positions for clamping the catheter body 2 to be installed with the platinum-iridium ring 3. The two tensioning clamps 711 move synchronously in opposite directions. The upper and lower positioning clamp 712 is located at the center of the two tensioning clamps 711 and is used to fix the platinum-iridium ring 3 to the catheter body 2. The positioning shaft 8 passes through the inside of the guide tube body 2. C-shaped rings 9 are sleeved at both ends of the guide tube body 2. The clamps 6 are clamped on the outside of the C-shaped rings 9. There are two clamps 6 located at the feeding end of the guide tube body 2. The feeding support 10 is set on the back plate 4 at the feeding end of the guide tube body 2.

[0026] In addition, the curved rail 512 has a C-shaped structure. The curved rail 512 is connected to both ends of the straight rail 511. The straight rail 511 is connected to an extension rail 514 near the feeding end. The extension rail 514 can be switched to be connected to the straight rail 511 and the curved rail 512. It should be noted that the straight rail 511 and the extension rail 514 are on the same straight line and are flush with the central axis of the guide tube body 2. The end face of the straight rail 511 at the feeding end is set away from the feeding support 10, and the end face of the extension rail 514 extends to the feeding support 10. A pressure sensor 521 is provided on the inner wall of the end face of the extension rail 514 away from the straight rail 511. The running trajectory of the feeding clamp 513 is as follows: Starting from the curved rail 512 near the loading end, the material first enters the extension rail 514. During the process of entering the extension rail 514, the loading clamp 513 moves from top to bottom until it is horizontal with the loading support 10. At this time, the clamping end of the loading clamp 513 has not yet extended to the position of the loading support 10. It continues to move within the extension rail 514, and the loading clamp 513 gradually approaches the loading support 10. Its clamping end extends into the end face of the platinum-iridium ring 3 on the loading support 10, clamps it, and continues to move until the loading clamp 513 is on the extension rail 514. 4. The internal pressure sensor 521 is triggered. At this time, the feeding clamp 513 moves in the opposite direction in the extension rail 514, and the channel switches to the extension rail 514 and the straight rail 511. At this time, the feeding clamp 513 moves along the straight rail 511 with the platinum-iridium ring 3 until the platinum-iridium ring 3 is placed in the corresponding position of the guide tube body 2. After the feeding clamp 513 releases the platinum-iridium ring 3, it continues to move at a constant speed on the straight rail 511. Then it enters the curved rail 512 and moves into the extension rail 514 again. This cycle repeats. It should be noted that a control box is provided on the workbench 1, and a microcontroller is provided in the control box. The pressure sensor 521 will convert the detected data into an electrical signal through the microcontroller's rotating ring, and transmit it to the control element that moves the loading clamp 513 in the track, so that it will drive the loading clamp 513 to move in the opposite direction in the extension rail 514.

[0027] In addition, a rack 111 is provided at one end of the inner wall of the slide rail 5, and a first gear 112 is rotatably provided on the feeding clamp 513. The first gear 112 meshes with the rack 111. A motor rail 113 is provided at the center of the slide rail 5. A first motor 114 is slidably provided in the motor rail 113. The output end of the first motor 114 is linked with the first gear 112. By driving the first motor 114 to rotate the first gear 112, since the first gear 112 meshes with the rack 111, the first gear 112 can move within the slide rail 5. When the loading clamp 513 triggers the pressure sensor 521 within the extension rail 514, the first motor 114 flips and drives the loading clamp 513 to move in the opposite direction within the extension rail 514. It should be noted that the first gear 112 can mesh with the racks 111 at all positions of the slide rail 5.

[0028] In addition, a switching plate 121 is provided at the connection between the straight rail 511 and the extension rail 514 and the curved rail 512. The switching plate 121 is rotatably set at the connection between the straight rail 511 and the extension rail 514 via a coil spring. An assembly groove 122 for fitting the switching plate 121 is provided on the straight rail 511. The switching plate 121 is set in an arc shape, and the upper end of the switching plate 121 extends to the edge of the switching port above the straight rail 511. In the initial state, the coil spring drives the switching plate 121 to be in a tilted state, which can ensure that the switching plate 121 completely cuts off the connection between the straight rail 511 and the extension rail 514. With the first motor 114 sliding in the motor rail 113, the loading clamp 513 moving down from the curved rail 512 can only enter the extension rail 514. Then, when moving in the opposite direction, the first gear 112 squeezes the switching plate 121 to rotate into the assembly groove 122 and retracts. The first gear 112 can then move normally into the straight rail 511.

[0029] The feeding clamp 513 includes a fixed frame 131, a right-angle clamp 132, a first bidirectional lead screw 133 and a second motor 134. The fixed frame 131 has a rotating block 135 rotatably mounted on its back. The first gear 112 is linked with the rotating block 135. The first bidirectional lead screw 133 is rotatably mounted inside the fixed frame 131. Two right-angle clamps 132 are provided and arranged symmetrically above and below. One end of the right-angle clamp 132 is threaded onto the first bidirectional lead screw 133, and the other end is used to extend to the inner wall of the platinum-iridium ring 3. The end face of the first bidirectional lead screw 133 is driven to rotate by the second motor 134. The lower end of the fixing frame 131 is provided with a counterweight block 136. The counterweight 136 is used to increase the weight at the bottom of the fixing frame 131, so that the loading clamp 513 remains vertical during movement and avoids affecting the clamping effect. Additionally, the second motor 134 drives the first bidirectional lead screw 133 to rotate, which in turn drives the two right-angle clamps 132 to move synchronously in opposite directions, used to support the platinum-iridium ring 3 from the inside or to release the platinum-iridium ring 3.

[0030] In addition, the feeding tray 10 is assembled and connected to the back plate 4 through the support frame 141. The feeding tray 10 has an end plate 142 at the end away from the guide tube body 2. The inner side of the end plate 142 is provided with a push plate 144 through the cylinder 143. The platinum-iridium ring 3 to be installed is placed on the feeding tray 10. By driving the cylinder 143, the push plate 144 is moved towards the guide tube body 2, which can push the platinum-iridium ring 3 to move a certain distance, so as to facilitate feeding with the feeding clamp 513.

[0031] The workbench 1 has a first slide groove 152 above it, a first lead screw 153 is rotatably installed in the first slide groove 152, a first slider 154 is slidably installed in the first slide groove 152, the first slider 154 is threaded on the first lead screw 153, and the first lead screw 153 is driven to rotate by a third motor 155. A slide block 156 is provided above the first slider 154. A second bidirectional lead screw 157 is rotatably provided inside the slide block 156. The second bidirectional lead screw 157 is driven to rotate by a fourth motor 158. The two ends of the second bidirectional lead screw 157 are symmetrically threaded with second sliders 159. The second slider 159 is assembled and connected to the tension clamp 711 through the first bracket 160. The center of the slide block 156 is assembled and connected to the upper and lower positioning clamps 712 through the second bracket 161. The clamping method of the tension clamp 711 is the same as the clamping method of the feeding clamp 513. The principle is as follows: when adjusting the overall position of the stretching assembly, the third motor 155 drives the first lead screw 153 to rotate, which in turn drives the first slider 154 to move relative to the long platform 151 and adjust it to a suitable angle, that is, the position of the upper and lower positioning clamps 712 is the upper ring position on the catheter body 2. Then the two stretching clamps 711 are opened to facilitate the platinum-iridium ring 3 to enter between the two sets of stretching clamps 711. Subsequently, the catheter body 2 is clamped and stretched to become thinner, so that the platinum-iridium ring 3 can smoothly enter the opened upper and lower positioning clamps 712 for fixation.

[0032] In addition, the upper and lower positioning clamps 712 include an upper support ring 211, a lower support ring 212 and a rolling assembly. The lower support ring 212 is disposed on the upper end of the second bracket 161. One end of the upper support ring 211 is rotatably connected to the lower support ring 212 through a rotating shaft 213. The rolling assembly is disposed on the upper support ring 211 and the lower support ring 212 and is used to roll and position the platinum-iridium ring 3 and the catheter body 2. One end of the rotating shaft 213 is driven to rotate by a motor 214. The motor 214 is disposed on the second bracket 161. It should be noted that the inner arc surfaces of the upper support ring 211 and the lower support ring 212 are provided with limiting grooves 215 that are adapted to the platinum-iridium ring 3. The limiting groove 215 in the lower support ring 212 is connected to the outside at the feeding end. In this process, the upper support ring 211 is rotated and opened relative to the lower support ring 212 by the motor 214. The feeding clamp 513 drives the platinum-iridium ring 3 into the lower support ring 212. After entering the limiting groove 215 of the lower support ring 212, the limiting groove 215 is close to the feeding end and connected to the outside, while the other end is closed. During the movement, the end face of the platinum-iridium ring 3 is blocked by the lower support ring 212 and cannot leave the limiting groove 215. At this time, the feeding clamp 513 retracts and separates from the platinum-iridium ring 3. Finally, the upper support ring 211 is closed, which can stably limit the platinum-iridium ring 3 in the limiting groove 215. The rolling mechanism includes rolling rollers 221 and inclined rails 222. There are four inclined rails 222, which are arranged in pairs at equal distances on the outside of the upper support ring 211 and the lower support ring 212. The extension lines of the four inclined rails 222 intersect at the center of the upper and lower positioning clamps 712. The two ends of the rolling rollers 221 rotate and slide on the inside of the inclined rails 222. The upper support ring 211 and the lower support ring 212 are respectively provided with through grooves 224 for the rolling rollers 221 to pass through. The end face of the rolling rollers 221 is driven to rotate by a motor 225. In addition, a fixing block 226 is provided at the center of the outer side of the upper support ring 211 and the lower support ring 212 respectively. The end face of the rolling roller 221 is rotatably provided with a telescopic shaft 227. The other end of the telescopic shaft 227 is rotatably provided on the corresponding fixing block 226. The end faces of two adjacent telescopic shafts 227 on the upper support ring 211 and the lower support ring 212 are meshed with a second gear 228. The end face of the rotating shaft 213 is rotatably provided with an end shaft 229. The end shaft 229 is meshed with a first gear 112 on the upper support ring 211 and the lower support ring 212 respectively through a belt. The end shaft 229 is driven to rotate by a motor 230. Among them, the second motor 230 drives the rotation, which drives the second gear 228 on the upper support ring 211 and the lower support ring 212 to rotate, thereby driving all the telescopic shafts 227 to rotate around the corresponding second gear 228. This can drive the rolling wheel 221 at the other end of the telescopic shaft 227 to slide on the inclined rail 222, thereby adjusting the force of the rolling wheel 221 to squeeze the platinum-iridium ring 3, and achieving the effect of gradually rolling the platinum-iridium ring 3 to firmly fix it to the conduit body 2. It should be noted that the motor 225 is slidably mounted on the outside of the corresponding inclined rail 222, and the shaft of the end face of the rolling roller 221 slides through the side wall of the inclined rail 222 and extends outward. The output end of the motor 225 is linked with it. In addition, at least two rolling rollers 221 are driven by the motor 225, and the remaining rolling rollers 221 can rotate by friction with the platinum-iridium ring 3.

[0033] The workbench 1 is provided with a second slide groove 311, and a fourth slider 312 is symmetrically slidably arranged in the second slide groove 311. The clamps 6 located at both ends are respectively arranged on the two fourth sliders 312. The two fourth sliders 312 move synchronously in opposite directions, and the moving structure is the same as the synchronous reverse sliding structure of the tension clamp 711 in the slide block 156. The clamping structure of the clamp 6 is the same as the clamping structure of the tension clamp 711.

[0034] Working principle: Before operation, some preparatory work is required. First, select the catheter body 2 to be installed, leaving a certain length at both ends of the catheter body 2. First, insert one end of the positioning shaft 8 into the end face of the catheter body 2 and exit from the other end, so that both ends of the positioning shaft 8 are on the outside of both ends of the catheter body 2. Then, insert the reserved ends of the catheter body 2 into the two C-rings 9 respectively. After the preparation is completed, place the C-rings 9 at both ends of the catheter body 2 at the two sets of clamps 6 respectively. The clamps 6 are used to clamp and fix both ends of the catheter body 2. There are two sets of clamps 6 at the feeding end. Apply lubricant evenly to the outside of the catheter body 2. In addition, adjust the position of the clamps 6 at both ends of the catheter body 2 to keep the catheter body 2 straight and in a slightly stretched state to ensure To ensure the platinum-iridium ring 3 can move smoothly on the conduit body 2, during the loading process, multiple platinum-iridium rings 3 to be assembled are placed stably on the loading tray 10 in sequence. Then, the cylinder 143 pushes the push plate 144 to push the platinum-iridium ring 3 to the loading clamp 513, driving the loading clamp 513 to move within the slide rail 5 until it is positioned on the extension rail 514. During the movement of the loading clamp 513 towards the loading tray 10, the right-angle clamp 132 of the loading clamp 513 just passes through one end of the platinum-iridium ring 3 and supports it. Subsequently, after the loading clamp 513 triggers the pressure sensor 521, it moves in the opposite direction within the extension rail 514, thereby driving the corresponding platinum-iridium ring 3 to move onto the C-shaped ring 9 at one end of the conduit body 2. The platinum-iridium ring 3 and the conduit body 2 are always coaxial. In this state, because the C-ring 9 at the feeding end is equipped with two clamps 6, which clamp the two ends of the C-ring 9 respectively, one clamp 6 at the end away from the conduit body 2 is opened first, while the other clamp 6 remains stably clamped. At this time, it is convenient for the feeding clamp 513 to smoothly feed the platinum-iridium ring 3 onto the C-ring 9. After the platinum-iridium ring 3 passes through the position of the clamp 6, the clamp 6 clamps the C-ring 9. At the same time, the other clamp 6 opens, which facilitates the platinum-iridium ring 3 to pass smoothly through and enter the conduit body 2. The stretching assembly moves in advance to the position of the conduit body 2 to be ringed. When the platinum-iridium ring 3 initially moves to the position to be ringed, the stretching clamp 711 on the stretching assembly clamps the two ends of the conduit body 2 at this position and simultaneously stretches in the opposite direction, so that the conduit body 2 is stretched without damaging its quality. During the stretching process, the catheter body 2 separates from the upper support ring 211 and the lower support ring 212. After the platinum-iridium ring 3 moves to the position of the lower support ring 212, the upper support ring 211 moves down. Through the cooperation of the upper support ring 211 and the lower support ring 212, the platinum-iridium ring 3 is positioned inside. At this time, the loading clamp 513 is removed from the platinum-iridium ring 3 and continues to move on the slide rail 5 to pick up another platinum-iridium ring 3 and repeat the above steps for installation. At this time, the stretching clamp 711 is released, and the diameter of the catheter body 2 after resetting increases to support the inner wall of the platinum-iridium ring 3, achieving initial fixation of the platinum-iridium ring 3. Then, the upper support ring 211 and the lower support ring 212 are further rolled and tightened, so that the platinum-iridium ring 3 is firmly assembled on the catheter body 2. Subsequently, the stretching assembly moves to the next position to be installed.Wait for the feeding clamp 513 to bring the next platinum-iridium ring 3 for assembly. After all assemblies are complete, remove the catheter body 1 and trim the length originally reserved at both ends. This is because the C-ring 9 may cause severe deformation and damage under pressure; therefore, this was reserved before installation and trimmed after assembly.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A medical catheter platinum-iridium ring assembly device based on elastic tension, comprising a worktable (1) and clamps (6) for holding both ends of a catheter body (2), wherein a platinum-iridium ring (3) is fitted onto the outer side of the catheter body (2), characterized in that, Also includes: Back plate (4), the back plate (4) is located on the back side above the workbench (1), the back plate (4) is provided with slide rail (5), the slide rail (5) includes a straight rail (511) and a curved rail (512) connected to each other, and a feeding clamp (513) for feeding platinum-iridium ring (3) is slidably provided on the slide rail (5). The tensioning assembly is adjustable and movable above the front of the workbench (1). The tensioning assembly includes a tensioning clamp (711) and an upper and lower positioning clamp (712). The tensioning clamp (711) has two positions for clamping the catheter body (2) to be installed with the platinum-iridium ring (3). The two tensioning clamps (711) move synchronously in opposite directions. The upper and lower positioning clamp (712) is located at the center of the two tensioning clamps (711) and is used to fix the platinum-iridium ring (3) and the catheter body (2). Positioning shaft (8) is inserted inside the catheter body (2). C-rings (9) are fitted at both ends of the catheter body (2). The clamp (6) is clamped on the outside of the C-rings (9). There are two clamps (6) located at the feeding end of the catheter body (2). The feeding tray (10) is disposed on the back plate (4) at the feeding end of the guide tube body (2).

2. The medical catheter platinum-iridium ring assembly device based on elastic tension according to claim 1, characterized in that: The curved rail (512) has a C-shaped structure. The curved rail (512) is connected to both ends of the straight rail (511). The straight rail (511) is connected to an extension rail (514) near the feeding end. The extension rail (514) can be switched to connect with the straight rail (511) and the curved rail (512). The straight rail (511) and the extension rail (514) are on the same straight line and are flush with the central axis of the guide tube body (2). The end face of the straight rail (511) at the feeding end is set away from the feeding support (10). The end face of the extension rail (514) extends to the feeding support (10). A pressure sensor (521) is provided on the inner wall of the end face of the extension rail (514) away from the straight rail (511).

3. The medical catheter platinum-iridium ring assembly device based on elastic tension according to claim 1, characterized in that: A rack (111) is provided at one end of the inner wall of the slide rail (5). A first gear (112) is rotatably provided on the feeding clamp (513). The first gear (112) meshes with the rack (111). A motor rail (113) is provided at the center of the slide rail (5). A first motor (114) is slidably provided in the motor rail (113). The output end of the first motor (114) is linked with the first gear (112).

4. The medical catheter platinum-iridium ring assembly device based on elastic tension according to claim 3, characterized in that: A switching plate (121) is provided at the connection between the straight rail (511), the extension rail (514), and the curved rail (512). The switching plate (121) is rotatably set at the connection between the straight rail (511) and the extension rail (514) by a coil spring. An assembly groove (122) for fitting the switching plate (121) is provided on the straight rail (511). The switching plate (121) is set in an arc shape. The upper end of the switching plate (121) extends to the edge of the switching port above the straight rail (511).

5. The medical catheter platinum-iridium ring assembly device based on elastic tension according to claim 4, characterized in that: The feeding clamp (513) includes a fixed frame (131), a right-angle clamp (132), a first bidirectional lead screw (133), and a second motor (134). The fixed frame (131) has a rotating block (135) rotatably mounted on its back. The first gear (112) is linked with the rotating block (135). The first bidirectional lead screw (133) is rotatably mounted inside the fixed frame (131). There are two right-angle clamps (132) arranged symmetrically above and below each other. One end of the right-angle clamp (132) is threaded onto the first bidirectional lead screw (133), and the other end is used to extend to the inner wall of the platinum-iridium ring (3). The end face of the first bidirectional lead screw (133) is driven to rotate by the second motor (134). The lower end of the fixed frame (131) is provided with a counterweight block (136).

6. The medical catheter platinum-iridium ring assembly device based on elastic tension according to claim 3, characterized in that: The feeding tray (10) is assembled and connected to the back plate (4) through the support frame (141). The feeding tray (10) has an end plate (142) at one end away from the guide tube body (2). The end plate (142) has a push plate (144) on the inner side through the cylinder (143).

7. The medical catheter platinum-iridium ring assembly device based on elastic tension according to claim 3, characterized in that: The workbench (1) is provided with a first slide groove (152) above it. A first lead screw (153) is rotatably provided in the first slide groove (152). A first slider (154) is slidably provided in the first slide groove (152). The first slider (154) is threaded onto the first lead screw (153). The first lead screw (153) is driven to rotate by a third motor (155). A slide block (156) is provided above the first slider (154). A second bidirectional lead screw (154) is rotatably provided inside the slide block (156). 57), the second bidirectional lead screw (157) is driven to rotate by the fourth motor (158). The two ends of the second bidirectional lead screw (157) are symmetrically threaded with second sliders (159). The second slider (159) is connected to the tension clamp (711) above the first bracket (160). The center of the slide block (156) is connected to the upper and lower positioning clamps (712) through the second bracket (161). The clamping method of the tension clamp (711) is the same as that of the loading clamp (513).

8. The medical catheter platinum-iridium ring assembly device based on elastic tension according to claim 7, characterized in that: The upper and lower positioning clamps (712) include an upper support ring (211), a lower support ring (212), and a rolling assembly. The lower support ring (212) is located on the upper end of the second bracket (161). One end of the upper support ring (211) is rotatably connected to the lower support ring (212) via a rotating shaft (213). The rolling assembly is located on the upper support ring (211) and the lower support ring (212) and is used to roll and position the platinum-iridium ring (3) and the conduit body (2). One end of the rotating shaft (213) is driven to rotate by a motor (214). The motor (214) is located on the second bracket (161). The inner arc surfaces of the upper support ring (211) and the lower support ring (212) are provided with limiting grooves (215) that are adapted to the platinum-iridium ring (3). The limiting groove (215) in the lower support ring (212) is connected to the outside at the feeding end.

9. The medical catheter platinum-iridium ring assembly device based on elastic tension according to claim 8, characterized in that: The rolling mechanism includes rolling wheels (221) and inclined rails (222). Four inclined rails (222) are provided, arranged in pairs at equal distances outside the upper support ring (211) and lower support ring (212). The extension lines of the four inclined rails (222) intersect at the center of the upper and lower positioning clamps (712). The rolling wheels (221) rotate at both ends and slide inside the inclined rails (222). The upper support ring (211) and lower support ring (212) are respectively provided with through slots (224) for the rolling wheels (221) to pass through. The end face of the rolling wheels (221) is driven to rotate by a motor (225). The upper support ring (211) and lower support ring (212)... 2) Fixed blocks (226) are provided at the center of the outer side respectively. The end face of the rolling roller (221) is provided with a telescopic shaft (227). The other end of the telescopic shaft (227) is rotatably set on the corresponding fixed block (226). The end faces of two adjacent telescopic shafts (227) on the upper support ring (211) and the lower support ring (212) are meshed by a second gear (228). The end face of the rotating shaft (213) is provided with an end shaft (229). The end shaft (229) is meshed with one of the first gears (112) on the upper support ring (211) and the lower support ring (212) respectively by a belt. The end shaft (229) is driven to rotate by a second motor (230).

10. The medical catheter platinum-iridium ring assembly device based on elastic tension according to claim 9, characterized in that: The workbench (1) is provided with a second slide groove (311), and a fourth slider (312) is symmetrically slidably arranged in the second slide groove (311). The clamps (6) located at both ends are respectively arranged on the two fourth sliders (312). The two fourth sliders (312) move synchronously in opposite directions, and the moving structure is the same as the synchronous reverse sliding structure of the tension clamp (711) in the slide (156). The clamping structure of the clamp (6) is the same as the clamping structure of the tension clamp (711).

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