An infusion catheter device with quantitative control

Abstract

The present invention discloses a quantitatively controllable infusion catheter device, which relates to the field of medical devices. In this solution, a controller controls the main control unit to drive the transmission control unit to rotate. The liquid inside the infusion tube flows under the influence of the extrusion speed when it is extruded, realizing stable control of the infusion speed and precise quantitative infusion control. As the infusion tube gradually deteriorates, by controlling the energization power of the electromagnet, the moving speed of the infusion tube can be controlled by controlling the adsorption force of the electromagnet. As the deformation amount of the infusion tube increases, the rotation speed of the transmission control unit increases. When the preset speed is reached, the whole can realize automatic displacement and position replacement. This solution can realize the surface displacement of the infusion tube independently. The overall structure is simple, greatly realizing the miniaturized design, reducing the occupation of space of other medical devices, and adopting the method of rotational speed compensation for deformation to realize stable and controllable control of the liquid medicine speed and quantitative transmission, and overall meeting the moving requirements during the infusion process and stopping the infusion.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and particularly to an infusion catheter device with quantitative control. Background Art

[0002] Infusion, as one of the commonly used treatment methods in modern medicine, delivers medicinal liquid into veins. When injecting or dripping drugs intravenously, some drugs are sensitive to dosage (such as chemotherapy drugs, anesthetics, insulin, etc.), and it is necessary to strictly control the infusion volume to avoid side effects or weakened efficacy caused by overdose or underdose. For patients who need to strictly control the body fluid balance (such as patients with heart failure, renal failure or in intensive care), quantitative infusion can avoid edema caused by excessive fluid or dehydration caused by insufficient fluid. For some drugs with high concentration or strong potency (such as hormonal drugs, certain antibiotics or immunosuppressants), they need to be infused at an extremely low flow rate, and quantitative infusion can achieve precise delivery of small doses. For patients with severe dehydration, shock or poisoning, precise infusion is required to quickly replenish fluid or dilute toxins, while avoiding the burden on the heart and lungs caused by excessive infusion.

[0003] As can be seen from the above, quantitative infusion is widely used, and the non-contact pumping method is one of the more common methods at present. For example, a precise quantitative infusion device is proposed in a Chinese patent (publication number CN 106039471 B). In order to avoid deformation and adhesion of the traditional extrusion hose, it adopts a contact method. Since the medicinal liquid needs to flow through the metering component, it is easily affected by the equipment material. For example, for medicinal liquids with corrosive or special chemical components, the internal part of the device may undergo material aging or corrosion due to long-term contact, resulting in a decrease in metering accuracy. In addition, the contact structure is prone to contamination or medicinal liquid compatibility problems due to medicinal liquid residue, which may bring the risk of cross-infection in scenarios with high cleanliness requirements or when the device is shared by multiple patients. At the same time, the medicinal liquid residue inside the device increases the difficulty of cleaning and disinfection and prolongs the maintenance time of the device;

[0004] At the same time, for example, a Chinese patent (publication number CN 108025131 B) proposes an infusion pump. In this pump, "after completely blocking the infusion tube by moving the upstream blocking component and the downstream blocking component of the pump mechanism in the pressing direction, the internal pressure of the infusion tube can be increased. In this way, the decrease in the restoring force caused by the deterioration of the infusion tube can be compensated". The quantitative infusion method of this type of structure is still complex, its degree of miniaturization is limited, and it is squeezed at a high frequency for a long time in one area. As it gradually deteriorates, not only the reset speed decreases, but there is also a risk of infusion tube breakage. Especially in a low-temperature environment, the plastic hardness of the infusion tube is higher, and it is more likely to break under a certain number of squeezes. Often, after a period of time, medical staff need to change its position, which is inconvenient to use. Based on the good reset characteristics of the infusion tube under a certain number of squeezes, a new solution is proposed in this scheme to solve the above problems. Summary of the Invention

[0005] The object of the present invention is to provide a quantitatively controllable infusion catheter device to solve the problem of deterioration of the infusion tube during contactless quantitative infusion.

[0006] To achieve the above object, the present invention adopts the following technical solutions: A quantitatively controllable infusion catheter device includes an infusion tube, a main frame and a sliding seat clamped thereon. A controller is jointly installed on one side of the main frame and the sliding seat. A transmission control unit for controlling the flow rate of the liquid medicine in the infusion tube is installed on the main frame, and a displacement control component for switching the operation mode of the transmission control unit is also installed.

[0007] The transmission control unit includes a rotating component for pressing the infusion tube to control the liquid transmission therein and a pressing component for controlling the switching of the friction force of the rotating component on the infusion tube. A main control unit for driving the transmission control unit is installed on the main frame, and moving detection modules are symmetrically installed at both ends of the infusion tube on the main frame.

[0008] The transmission control unit includes a first mode and a second mode. In the first mode, the friction force between the infusion tube and the sliding seat is greater than that of the transmission control unit, keeping the infusion tube and the device relatively stationary. In the second mode, the friction force between the infusion tube and the sliding seat is less than that of the transmission control unit, causing relative displacement between the infusion tube and the device.

[0009] As a further description of the above technical solution: The sliding seat includes a seat body and a pressing table integrally formed with the seat body. A fitting groove for fitting the infusion tube is opened on the inner side of the pressing table. Two sliding grooves are symmetrically opened on the upper surface of the seat body, and elastic teeth are provided on one side of the sliding groove.

[0010] As a further description of the above technical solution: The main frame includes a frame body, and guide rails for sliding in the sliding grooves are symmetrically arranged on both sides of the frame body. A card slot for positioning the elastic teeth is opened on the surface of the guide rail. An installation slot, a through slot and an embedding slot are also opened on the frame body, and a protective cover is clamped on the inner wall of the installation slot.

[0011] As a further description of the above technical solution: The rotating component includes a wheel disc. A plurality of support rods are arranged on the lower surface of the wheel disc. A rubber wheel for pressing the infusion tube is rotatably arranged on the surface of the support rod. A tooth groove is opened on the inner wall of the wheel disc. A plurality of marking scales are evenly distributed on the arc-shaped side wall of the wheel disc. A displacement sensor for measuring the rotation speed of the wheel disc through the marking scale is arranged on one side of the wheel disc.

[0012] As a further description of the above technical solution: The pressing component includes a rotating table fixedly penetrating through the inner wall of the tooth groove. A rotating support shaft rotatably penetrates through the inner wall of the rotating table. The pressing component further includes a lifting slide table that vertically slides within the through groove. The bottom end of the rotating support shaft is slidably disposed within the inner wall of the lifting slide table, and a spring is jointly compressed between the inner wall of the lifting slide table and the bottom end of the rotating support shaft;

[0013] An annular groove is formed in the arc-shaped side wall of the lifting slide table. A pressing frame is rotatably limited within the inner wall of the annular groove. The bottom ends of the support rods slide at the four corners of the pressing frame.

[0014] As a further description of the above technical solution: The movement detection module includes a rotation sensor fixed to the frame body. A fitting wheel for pressing the infusion tube is provided at the detection end of the rotation sensor. A wire for connecting control is provided on one side of the rotation sensor.

[0015] As a further description of the above technical solution: The main control unit includes a driver fixedly connected to the upper surface of the frame body. A display is provided on one side of the driver. An output gear meshing with the tooth groove is provided at the output end of the driver.

[0016] As a further description of the above technical solution: The displacement control component includes a thimble fixed to the bottom end of the lifting slide table. A response plate is fixed to the bottom end of the thimble. A metal block is fixed to one end of the response plate. A guide post fixed to the lower surface of the frame body penetrates and slides through the surface of the response plate. The displacement control component further includes an electromagnet installed within the fitting groove. The electromagnet is electrically connected to the controller and is used to cooperate with the adsorption of the metal block.

[0017] As a further description of the above technical solution: The controller is electrically connected to the upper computer or directly powered, and the upper computer is loaded with a collaborative control platform.

[0018] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are as follows:

[0019] In this solution, the controller controls the main control unit to drive the transmission control unit to rotate. When the transmission control unit is in the first mode, the pressing frame does not press the rubber wheel, so that the rubber wheel can fit and roll on the surface of the infusion tube without being affected by friction. The liquid inside the infusion tube is affected by the extrusion speed and flows under extrusion, and automatically resets under its own elastic action after extrusion. At the same time, after a period of use, in order to ensure a constant flow rate, the flow meter is used to detect the flow rate of the liquid medicine during use. As the extruded part of the infusion tube gradually deforms, the main control unit drives the transmission unit to increase the rotation speed, realizing stable control of the infusion speed and precise quantitative infusion control;

[0020] As the infusion tube gradually deteriorates, by controlling the energizing power of the electromagnet, the adsorption force on the metal block is made different. During the adsorption process of the metal block, the adsorption force is converted into the pressure received by the pressing assembly, and the greater the pressure, the greater the friction between the pressing frame of the pressing assembly and the rubber wheel. The greater the friction between the rubber wheel and the pressing frame, the closer the rubber wheel fits on the surface of the infusion tube. At this time, it is in the second mode. The friction of the rubber wheel on the infusion tube is greater than the friction of the infusion tube in the fitting groove, causing the infusion tube to move relative to this device. By controlling the adsorption force of the electromagnet, the moving speed can be controlled. As the deformation of the infusion tube increases, the rotation speed of the transmission control unit increases. When the preset speed is reached, the whole can achieve automatic displacement and position replacement.

[0021] Meanwhile, during the moving process, slow movement is achieved through the difference between the friction of the rubber wheel on the infusion tube and the friction of the fitting groove on the infusion tube. And during the moving process, continuous control of the infusion is achieved by controlling the rotation speed. When moving during the stop of infusion, the electromagnet is started with the maximum power, and the rubber wheel is completely pressed and locked by the maximum pressure of the pressing frame. At this time, based on the characteristic of the greater friction of the rubber wheel, when the rubber wheel contacts the infusion tube, it will not slide, causing the infusion tube to slide directly and there is no liquid medicine transmission inside.

[0022] This solution can achieve autonomous displacement on the surface of the infusion tube, eliminating the need for a reset structure after the deterioration of the infusion tube. The overall structure is simple, greatly realizing miniaturized design, reducing the occupation of space for other medical devices, and adopting a method of rotational speed compensation for deformation to achieve stable and controllable liquid medicine speed control and quantitative transmission, overall meeting the moving requirements during infusion and the moving requirements during the stop of infusion. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the system architecture of the present invention;

[0024] Figure 2 It is a three-dimensional schematic diagram of the present invention;

[0025] Figure 3 It is a three-dimensional schematic diagram of another perspective of the present invention;

[0026] Figure 4 It is an exploded schematic diagram of the present invention;

[0027] Figure 5 It is an exploded schematic diagram of another perspective of the present invention;

[0028] Figure 6 It is a schematic diagram of the layout of the power connection pins after the controller of the present invention is removed;

[0029] Figure 7 It is a schematic diagram of the cross-section of the present invention;

[0030] Figure 8Schematic cross-sectional view of the partial three-dimensional structure of the present invention;

[0031] Figure 9 Schematic diagram of the overall structure of the main frame, sliding seat and controller of the present invention after disassembly;

[0032] Figure 10 Schematic diagram of the separated state where the sliding seat slides out of the main frame of the present invention;

[0033] Figure 11 Schematic cross-sectional view of the clamped state of the main frame and the sliding seat of the present invention;

[0034] Figure 12 Schematic three-dimensional view of the transmission control unit of the present invention;

[0035] Figure 13 Explosion diagram of the transmission control unit of the present invention;

[0036] Figure 14 Schematic cross-sectional view of the three-dimensional mobile detection module of the present invention.

[0037] Legend:

[0038] 10. Main frame; 11. Frame body; 12. Guide rail; 13. Card slot; 14. Through slot; 15. Fitting groove; 16. Installation groove;

[0039] 20. Sliding seat; 21. Seat body; 22. Sliding groove; 23. Elastic cogs; 24. Pressing platform; 25. Fitting groove;

[0040] 30. Main control unit; 31. Driver; 32. Output gear; 33. Display;

[0041] 40. Transmission control unit; 41. Rotating assembly; 411. Turntable; 412. Tooth groove; 413. Support rod; 414. Marking ruler; 415. Rubber wheel; 416. Displacement sensor; 42. Pressing component; 421. Lifting sliding table; 422. Rotating support shaft; 423. Rotating table; 424. Pressing frame; 425. Spring; 426. Annular groove;

[0042] 50. Displacement control component; 51. Response plate; 52. Thimble; 53. Guide post; 54. Metal block; 55. Electromagnet;

[0043] 60. Mobile detection module; 61. Rotating sensor; 62. Fitting wheel; 63. Wire;

[0044] 70. Controller; 80. Protective cover; 90. Infusion tube. Detailed implementation manners

[0045] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0046] As Figure 1 - Figure 14 shown, the present invention provides a quantitatively controllable infusion catheter device, which includes an infusion tube 90 and a main frame 10 and a sliding seat 20 clamped thereon. A controller 70 is jointly installed on one side of the main frame 10 and the sliding seat 20. A transmission control unit 40 for controlling the liquid flow rate in the infusion tube 90 is installed on the main frame 10, and a displacement control component 50 for switching the operation mode of the transmission control unit 40 is also installed.

[0047] The transmission control unit 40 includes a rotating component 41 for pressing the infusion tube 90 to control the liquid transmission therein and a pressing component 42 for controlling the switching of the friction force of the rotating component 41 on the infusion tube 90. A main control unit 30 for driving the transmission control unit 40 is installed on the main frame 10. Moving detection modules 60 are symmetrically installed at both ends of the infusion tube 90 on the main frame 10 respectively.

[0048] The transmission control unit 40 controls the liquid flow in the infusion tube 90 by rotation, and at the same time can control the displacement of the infusion tube 90 under the change of its friction force.

[0049] The transmission control unit 40 includes a first mode and a second mode. In the first mode, the friction force between the infusion tube 90 and the sliding seat 20 is greater than the friction force between the infusion tube 90 and the transmission control unit 40, keeping the infusion tube 90 relatively stationary with respect to the device. In the second mode, the friction force between the infusion tube 90 and the sliding seat 20 is less than the friction force between the infusion tube 90 and the transmission control unit 40, causing relative displacement between the infusion tube 90 and the device.

[0050] The automatic switching between the first mode and the second mode greatly reduces the need for manual supervision.

[0051] Specifically, as Figure 10 shown: The sliding seat 20 includes a seat body 21 and a pressing table 24 integrally formed with the seat body 21. A fitting groove 25 for fitting the infusion tube 90 is opened on the inner side of the pressing table 24. Two sliding grooves 22 are symmetrically opened on the seat body 21, and elastic locking teeth 23 are provided on one side of the sliding grooves 22.

[0052] The fitting groove 25 can maintain a better fit with the infusion tube 90. Compared with the friction between the rubber wheel 415 and the infusion tube 90, the rubber material of the fitting groove 25 has a higher friction coefficient. When the rubber wheel 415 fits the infusion tube 90 and does not rotate, the infusion tube 90 will be subject to a greater friction force from the rubber wheel 415 and thus displace.

[0053] The main frame 10 includes a frame body 11, and guide rails 12 that slide in cooperation with the sliding grooves 22 are symmetrically arranged on both sides of the frame body 11. A card slot 13 for positioning the elastic teeth 23 is provided on the surface of the guide rail 12. An installation groove 16, a through groove 14, and a fitting groove 15 are also provided on the frame body 11. A protective cover 80 is snap-fitted to the inner wall of the installation groove 16.

[0054] The guide rails 12 provided on both sides of the frame body 11 can satisfy the sliding of the sliding seat 20 in the sliding groove 22. An elastic tooth 23 is provided on one side of the sliding groove 22 of the sliding seat 20, and the elastic tooth 23 can be limited at the end position of the guide rail 12 to realize the clamping and fixing between the main frame 10 and the sliding seat 20;

[0055] At the same time, the installation groove 16 on the frame body 11 can facilitate the snap-fitting with the protective cover 80. There are actually some strip-shaped bumps in the installation groove 16. When the protective cover 80 is snapped in, the installation groove 16 can be installed with the protective cover 80, and at the same time, the protective cover 80 can protect the bottom;

[0056] Specifically, as Figure 13 shown: The rotating assembly 41 includes a wheel disc 411. A plurality of support rods 413 are arranged on the lower surface of the wheel disc 411. A rubber wheel 415 for squeezing the infusion tube 90 is rotatably arranged on the surface of the support rod 413. A tooth groove 412 is provided on the inner wall of the wheel disc 411. A plurality of marking scales 414 are evenly distributed on the arc-shaped side wall of the wheel disc 411. A displacement sensor 416 for measuring the rotation speed of the wheel disc 411 through the marking scale 414 is arranged on one side of the wheel disc 411.

[0057] The wheel disc 411 can be rotated by meshing with the output gear 32 through the tooth groove 412. At the same time, the integrally formed support rods 413 on its surface can satisfy the rotation of the rubber wheel 415. The marking scales 414 arranged on the arc-shaped side wall of the wheel disc 411 can assist the displacement sensor 416 in detection during rotation. According to the moving speed of the marking scale 414, the rotation speed can be understood, and there is no marking scale 414 at the position of the support rod 413, which can enter calibration when the marking scale 414 is not detected;

[0058] During each calibration process, it means that the displacement sensor 416 does not detect the marking scale 414, and it is determined that this position is the measurement position of the rubber wheel 415.

[0059] Specifically, as Figure 13As shown: The pressing assembly 42 includes a rotating table 423 fixedly penetrating through the inner wall of the tooth groove 412. A rotating support shaft 422 rotatably penetrates through the inner wall of the rotating table 423. The pressing assembly 42 further includes a lifting slide table 421 vertically sliding within the through groove 14. The bottom end of the rotating support shaft 422 is slidably disposed within the inner wall of the lifting slide table 421, and a spring 425 is jointly pressed between the inner wall of the lifting slide table 421 and the bottom end of the rotating support shaft 422;

[0060] By providing the rotating table 423, the rotating table 423 is fixed within the wheel disc 411 and rotates on the surface of the rotating support shaft 422. At the same time, the rotating support shaft 422 is inserted onto the frame body 11 under the elastic action to maintain positioning. The lifting slide table 421 can always be located within the through groove 14 under the action of the internal spring 425, facilitating overall assembly, maintaining the overall structural stability, and providing a restoring force to the displacement control assembly 50. The overall structure is compact and small in size.

[0061] An annular groove 426 is formed on the arc-shaped side wall of the lifting slide table 421. A pressing frame 424 is rotatably limited within the inner wall of the annular groove 426, and the four corners of the pressing frame 424 are slidably disposed at the bottom ends of the support rods 413.

[0062] The annular groove 426 can allow the pressing frame 424 to slide within it as the wheel disc 411 rotates, and the annular groove 426 can provide a squeezing force to the pressing frame 424 during the vertical movement of the lifting slide table 421.

[0063] Specifically, as Figure 9 shown: The movement detection module 60 includes a rotation sensor 61 fixed to the frame body 11. A fitting wheel 62 for pressing the infusion tube 90 is provided at the detection end of the rotation sensor 61, and a wire 63 for connection control is provided on one side of the rotation sensor 61.

[0064] The rotation sensor 61, as Figure 14 shown in the cross-sectional view, can be seen that the principle is the same as that of the displacement sensor 416 in cooperation with the marking scale 414. When the sliding seat 20 and the frame body 11 clamp the infusion tube 90 together, the infusion tube 90 fits on the fitting wheel 62 at the bottom end of the rotation sensor 61, and the fitting wheel 62 rotates as the infusion tube 90 moves, realizing precise displacement detection of the infusion tube 90.

[0065] Specifically, as Figure 8 shown: The main control unit 30 includes a driver 31 fixedly connected to the upper surface of the frame body 11. A display 33 is provided on one side of the driver 31, and an output gear 32 meshing with the tooth groove 412 is provided at the output end of the driver 31.

[0066] By setting the driver 31, the driver 31 can precisely control the rotation of the output gear 32. Meanwhile, the display 33 is arranged on one side of the driver 31 and can display relevant parameters after being sorted out by the controller 70.

[0067] Specifically, as Figure 8 shown: The displacement control component 50 includes a thimble 52 fixed to the bottom end of the lifting slide 421. A response plate 51 is fixed to the bottom end of the thimble 52. A metal block 54 is fixed to one end of the response plate 51. A guide post 53 fixed to the lower surface of the frame 11 penetrates and slides on the surface of the response plate 51. The displacement control component 50 further includes an electromagnet 55 installed in the fitting groove 15. The electromagnet 55 is electrically connected to the controller 70 and is used to cooperate with the adsorption of the metal block 54.

[0068] By setting the metal block 54, the metal block 54 can respond under the action of the electromagnet 55. The cooperation of its response plate 51 and the guide post 53 can provide a guide for the movement of the metal block 54 to avoid misalignment. At the same time, the guide plate jacks up the lifting slide 421 through the thimble 52, and the reaction force of the spring 425 in the lifting slide 421 can keep the thimble 52 and the lifting slide 421 reset after losing the adsorption force of the electromagnet 55.

[0069] Specifically, as Figure 1 shown: The controller 70 is electrically connected to the upper computer or directly powered on, and the upper computer loads a collaborative control platform.

[0070] The collaborative control platform loaded by the upper computer is a software developed for this device and is a platform to assist other medical devices in interacting and controlling with this device.

[0071] The controller 70 of this device is directly powered on through USB or inserted into the upper computer loaded with the collaborative control platform. While the upper computer powers it on, it can obtain the optimal infusion speed and dose based on factors such as the human heart rate and body temperature. When directly powered on, it is generally suitable for ordinary patients. By directly operating the buttons on the surface of the controller 70 by medical staff and combining with the display 33, the infusion speed and infusion volume can be adjusted. When the infusion is completed, a buzzer arranged on one side gives a prompt;

[0072] As can be seen from the figure, the controller 70 is directly connected to the driver 31 and the electromagnet 55 and controls their power-on power, and also obtains the data of the displacement sensor 416 and the rotation sensor 61 in real time. The displacement sensor 416 detects the rotation speed of the turntable 411 in real time, and then compares it with the power of the driver 31 to avoid faults. If the driver 31 fails and the rotation speed of the turntable 411 does not match the power during continuous power output, it is determined as a fault. At the same time, the rotation sensor 61 can detect the displacement distance of the infusion tube 90;

[0073] Furthermore, as Figure 3 shown, a socket is provided at the bottom of the controller 70, which can access a flow sensor when higher precision is required. The flow sensor is clamped on the surface of the infusion tube 90, so as to be able to detect the liquid medicine transmission volume of the infusion tube 90 and feedback it to the controller 70. Since the flow sensor is a prior art, the specific connection relationship is not directly reflected in the solution.

[0074] When this solution is in use, by pushing the sliding seat 20, the elastic teeth 23 of the sliding seat 20 bend and disengage from the end of the guide rail 12, so that the sliding seat 20 slides on the guide rails 12 on both sides of the frame body 11. As it moves, the elastic teeth 23 are engaged into the card slots 13 on the surface of the guide rail 12 to realize the limitation of the sliding-out distance. When needed, by continuing to apply force, the separation of the sliding seat 20 and the main frame 10 can be realized. After the sliding seat 20 slides out, the infusion tube 90 can be placed between the sliding seat 20 and the main frame 10. Then, by pushing the sliding seat 20 to reset, the elastic teeth 23 of the sliding seat 20 disengage from the card slot 13 and finally engage with the end limit of the guide rail 12 to complete the overall installation;

[0075] At the same time, as the sliding seat 20 is completely reset, the infusion tube 90 is squeezed by the rubber wheel 415 of the rotation assembly 41 and enters the fitting groove 25. The medical staff directly operates the controller 70 or sends the parameters of the infusion speed and infusion volume to the controller 70 through the upper computer. The controller 70 controls the driver 31 to drive the driving gear to rotate. The driving gear meshes in the tooth grooves 412 of the wheel disc 411. The wheel disc 411 drives the rotating table 423 to rotate on the top of the rotating support shaft 422 under the drive. When the wheel disc 411 rotates, it drives the rubber wheel 415 to roll on the surface of the infusion tube 90. At this time, the rubber wheel 415 rotates on the surface of the support rod 413;

[0076] The rotating support shaft 422 is pressed in the rotating table 423, and the top of the rotating support shaft 422 is rotationally limited on the frame body 11. The bottom end of the rotating support shaft 422 is always in a jacking state under the action of the spring 425. At the same time, the reaction force of the spring 425 presses the lifting sliding table 421 in the through groove 14;

[0077] When the electromagnet 55 is started, the metal block 54 is pulled to drive the response plate 51 to move. The response plate 51 slides on the surface of the guide post 53 and drives the sliding table to compress the spring 425 through the ejector pin 52. When the sliding sleeve moves, it applies pressure to the pressure frame 424 through the annular groove 426 on its surface, so that the pressure frame 424 slides on the surface of the support rod 413 and fits on one side of the rubber wheel 415, making the rotation of the rubber wheel 415 blocked and realizing the frictional force between the rubber wheel 415 and the infusion tube 90.

[0078] Based on the above, the present solution provides an infusion catheter device with quantitative control, which can achieve quick disassembly and assembly on the infusion tube 90, is convenient to use, can avoid excessive deterioration of a region of the infusion tube 90, and does not require medical staff to frequently change positions, meeting the usage requirements and the replacement frequency of a normal infusion tube 90 for several days.

[0079] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes should be covered within the protection scope of the present invention.

Claims

1. A quantitatively controllable infusion catheter device, comprising an infusion tube (90) and a main frame (10) and a slide seat (20) clamped thereon, wherein a controller (70) is mounted on one side of the main frame (10) and the slide seat (20), characterized in that: The main frame (10) is equipped with a transmission control unit (40) for controlling the flow rate in the infusion tube (90), and is also equipped with a displacement control component (50) for switching the operation mode of the transmission control unit (40); The transmission control unit (40) comprises a rotating assembly (41) for pressing the infusion tube (90) to control the transmission of liquid therein, and a holding assembly (42) for controlling the rotation assembly (41) to switch the friction force of the infusion tube (90). A main control unit (30) for driving the transmission control unit (40) is mounted on the main frame (10). Movement detection modules (60) are symmetrically mounted on both ends of the infusion tube (90) on the main frame (10). The transmission control unit (40) comprises a first mode and a second mode. In the first mode, the friction force of the infusion tube (90) against the sliding seat (20) is greater than the friction force of the infusion tube (90) against the transmission control unit (40), so that the infusion tube (90) and the device are kept relatively stationary. In the second mode, the friction force of the infusion tube (90) against the sliding seat (20) is less than the friction force of the infusion tube (40), so that the infusion tube (90) and the device are relatively displaced. The rotating assembly (41) comprises a wheel disc (411), a plurality of support rods (413) are arranged on the lower surface of the wheel disc (411), a rubber wheel (415) for squeezing the infusion tube (90) is rotatably arranged on the surface of the support rod (413), a tooth groove (412) is provided on the inner wall of the wheel disc (411), a plurality of marking scales (414) are evenly distributed on the arc-shaped side wall of the wheel disc (411), and a displacement sensor (416) for measuring the rotation speed of the wheel disc (411) through the marking scale (414) is arranged on one side of the wheel disc (411); The pressing and holding assembly (42) includes a rotating table (423) passing through and fixed on the inner wall of the tooth groove (412), and a rotating support shaft (422) passing through and rotating on the inner wall of the rotating table (423). The pressing and holding assembly (42) also includes a lifting slide (421) located in the through groove (14) and vertically sliding. The bottom end of the rotating support shaft (422) is slidably arranged on the inner wall of the lifting slide (421), and the inner wall of the lifting slide (421) and the bottom end of the rotating support shaft (422) are jointly squeezed with a spring (425). The arc-shaped side wall of the lifting slide (421) is provided with an annular groove (426), and the inner wall of the annular groove (426) is limited and rotated with a pressing frame (424), and the four corners of the pressing frame (424) all slide on the bottom end of the support rod (413).

2. The quantitatively controllable infusion catheter device according to claim 1, characterized in that: The slide seat (20) comprises a seat body (21) and a pressing platform (24) integrally formed with the seat body (21); a fitting groove (25) for fitting the infusion tube (90) is provided on the inner side of the pressing platform (24); two sliding grooves (22) are symmetrically provided on the upper side of the seat body (21), and elastic locking teeth (23) are provided on one side of the sliding grooves (22).

3. The quantitatively controllable infusion catheter device according to claim 2, characterized in that: The main frame (10) comprises a frame body (11), and guide rails (12) are symmetrically arranged on both sides of the frame body (11) for sliding in matching slide grooves (22), and a groove (13) for positioning elastic latch teeth (23) is provided on the surface of the guide rail (12). The frame body (11) is also provided with an installation groove (16), a through groove (14) and an engaging groove (15), and a protective cover (80) is clamped on the inner wall of the installation groove (16).

4. The quantitatively controllable infusion catheter device according to claim 3, characterized in that: The movement detection module (60) comprises a rotation sensor (61) fixed on a frame (11); a detection end of the rotation sensor (61) is provided with a fitting wheel (62) for pressing and holding the infusion tube (90); and a wire (63) for connecting a control is provided on one side of the rotation sensor (61).

5. The quantitatively controllable infusion catheter device according to claim 4, characterized in that: The main control unit (30) comprises a driver (31) fixedly connected to the upper surface of the frame (11), a display (33) being provided on one side of the driver (31), and an output gear (32) meshing with a tooth groove (412) being provided at an output end of the driver (31).

6. The quantitatively controllable infusion catheter device according to claim 3, characterized in that: The displacement control component (50) includes a pin (52) fixed to the bottom end of the lifting slide (421), a response plate (51) fixed to the bottom end of the pin (52), a metal block (54) fixed to one end of the response plate (51), a guide column (53) fixed to the lower surface of the frame (11) slidingly passing through the surface of the response plate (51), and the displacement control component (50) also includes an electromagnet (55) installed in the engaging groove (15), the electromagnet (55) being electrically connected to the controller (70) and used to cooperate in adsorbing the metal block (54).

7. The quantitatively controllable infusion catheter device according to claim 1, characterized in that: The controller (70) is electrically connected to a host computer or directly connected to electricity, and the host computer is loaded with a collaborative control platform.

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