An electric infusion pump for infants and young children

Abstract

This invention discloses an electric infusion pump for infants and young children, comprising a housing, a tubing assembly, a switching assembly, and a power assembly. The housing has an equipment cavity, a tubing working groove, dual medication compartments, and a connecting port; a cover plate and a spare housing form a storage cavity. The tubing assembly includes an infusion tubing, dual connecting tubing, and a sealing connection structure; the infusion tubing contains a one-way valve. The switching assembly is located at the connecting port, and uses a mounting plate and a sliding key to switch the position of the connecting tubing and the infusion tubing, as well as to connect and disconnect them. The power assembly drives a squeezing plate to reciprocate and squeeze the infusion tubing to deliver the medication. This pump allows for quick switching of medication bags without disassembling the infusion tubing, avoiding puncture dislodgement and contamination caused by infant movement, simplifying operation, reducing the workload of medical staff, preventing backflow, maintaining sterility, and meeting the clinical infusion needs of infants and young children.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to an electric infusion pump for infants and young children. Background Technology

[0002] Portable electric infusion pumps are commonly used precision infusion medical devices in clinical practice. With their portability, mobility, and ability to stably control the infusion rate, they are widely used in clinical scenarios such as intravenous drug administration and postoperative analgesia. At the same time, due to their advantage of being able to precisely adjust the infusion rate, portable electric infusion pumps are gradually being used in pediatric clinical practice for infants and young children, including newborns and premature infants, for intravenous drug administration and nutritional fluid infusion.

[0003] Most existing portable electric infusion pumps are designed with a single drug compartment, allowing only one bag of drug to be infused at a time. After one bag of drug is infused, the infusion needs to be paused, and the connection between the drug bag and the injection tubing needs to be manually disconnected. After replacing the drug bag with a new one, the infusion pump can be restarted to continue the infusion operation.

[0004] However, when administering intravenous fluids to infants and young children via infusion pumps, their hyperactivity and lack of voluntary behavioral control often lead to unconscious movements and scratching. Therefore, when multiple bags of medication or different types of medication need to be infused, existing infusion pumps present the following problems: First, during the manual disassembly and replacement of the medication bags, existing infusion pumps require disconnecting from the injection tubing and then reconnecting. During this process, the infant's unconscious movement and tendency to touch or pull on the exposed tubing connection can cause the puncture needle to puncture through its thin and fragile end. The tube may prolapse into the vein, causing local bleeding, bruising, and swelling. It may also pull on the injection tubing, causing the tubing to loosen and the medication to leak. This process also significantly slows down the speed at which medical staff can change the medication. Furthermore, each medication change requires manual disconnection, reconnection, and restart, a cumbersome procedure that greatly increases the workload of pediatric medical staff. This is especially problematic in multi-patient settings, where delays in medication changes can disrupt treatment continuity. Additionally, disassembling the injection tubing increases the risk of contamination at the tubing connection points, potentially leading to infections in infants and young children. Summary of the Invention

[0005] The main objective of this invention is to provide an electric infusion pump for infants and young children. Through a dual-drug-filled tank, a mechanical switching component, and a sealed connection structure, it enables quick switching of the drug-filled bag without disassembling the infusion tubing, ensuring safe and sterile infusion, simplifying operation, reducing the workload of medical staff, and meeting the clinical infusion needs of infants and young children.

[0006] To achieve the above objectives, the present invention provides an electric infusion pump for infants and young children, comprising: The housing has an internal equipment cavity and an external surface with a pipeline working groove and two liquid medicine tanks for holding external liquid medicine bags. A connecting port is also provided between the two liquid medicine tanks, and the connecting port is located at the inlet end of the pipeline working groove. The tubing assembly includes an infusion tubing and a connecting tubing. Each connecting tubing corresponds to a medicine bag. The infusion tubing is detachably installed in the tubing working groove. One end of the infusion tubing is connected to the connecting tubing via a connecting structure to connect to the corresponding medicine bag, and the other end is connected to an external needle tubing. The infusion tubing and the connecting tubing are detachably connected. The switching component, located at the connection port, includes a conversion unit and a plug-in unit. The end of each connecting hose away from the medicine bag is slidably mounted on the conversion unit. The conversion unit controls the movement of the connecting hose to the inlet end of the pipeline working groove to achieve alignment with the infusion hose position. The plug-in unit pushes the end of the connecting hose away from the medicine bag away from or closer to the infusion hose to achieve plugging or unplugging separation from the infusion hose. A power assembly is disposed within the equipment cavity; it includes a drive unit and a compression plate connected to the drive unit; a compression port is provided between the equipment cavity and the pipeline working groove; the compression plate is slidably disposed within the equipment cavity, and one end of the plate can slide horizontally back and forth relative to the pipeline working groove through the compression port to achieve continuous compression of the infusion hose.

[0007] In one possible implementation, the tubing assembly further includes a one-way valve unit disposed within the infusion tubing, the one-way valve unit being arranged in the infusion tubing tubing between the connecting tubing and the extrusion plate, the one-way valve unit being used to allow fluid in the infusion tubing to flow unidirectionally toward the needle tubing.

[0008] In one possible implementation, the connection structure includes a connecting sleeve and a needle sleeve that are respectively connected to the ends of the connecting hose and the infusion hose. One end of the needle sleeve is provided with a needle tube that can be inserted and mated with the connecting sleeve. The needle tube is hollow and has an inlet at one end opposite to the connecting sleeve.

[0009] In one possible implementation, the connecting sleeve is fixed to the end of the connecting tubing, and the needle sleeve is fixed to the end of the infusion tubing; the connecting structure further includes a sealing diaphragm disposed within the connecting sleeve, the sealing diaphragm being disposed at one end of the connecting sleeve relative to the needle sleeve, which is used to seal the connecting tubing to prevent leakage of the drug bag; the needle tube on the needle sleeve can pass through the sealing diaphragm to achieve communication between the connecting tubing and the infusion tubing.

[0010] In one possible implementation, the housing is provided with openings corresponding to two liquid medicine compartments and two cover plates for sealing the openings. The two cover plates are snapped into the housing and include a main cover plate and a secondary cover plate. A spare shell is rotatably connected to the edge of the secondary cover plate away from the liquid medicine compartments. The spare shell and the secondary cover plate form a storage cavity for accommodating the liquid medicine bags.

[0011] In one possible implementation, the pin sleeve is fixed within the pipeline working groove; the conversion unit includes... The mounting plate is rotatably mounted inside the housing via a rotating shaft. The mounting plate is disc-shaped with grooves evenly spaced along its circumference. The connecting sleeve is inserted into the grooves, and the connecting sleeve can slide back and forth relative to the pin sleeve within the grooves under the action of the insertion and removal unit to achieve insertion or separation. A drive unit, which is connected to the mounting plate and at least partially passes through the housing to the outside, is used to control the rotation of the mounting plate to rotate the corresponding connecting hose to the position of the infusion hose.

[0012] In one possible implementation, a limiting abutment ring extending outward is provided on the outer circumference of the connecting sleeve, and the limiting abutment ring is located on the side of the mounting plate near the drug reservoir; the insertion and removal unit includes a sliding key slidably disposed on the housing and corresponding to the position of the mounting plate, and a pair of abutment plates distributed along the length direction of the connecting sleeve are protruding on the side of the sliding key opposite to the mounting plate; when the limiting abutment ring is rotated to correspond to the position of the infusion tubing, the limiting abutment ring is located between the pair of abutment plates, and the sliding key can move away from or closer to the infusion tubing to drive the abutment plates to abut against the limiting abutment ring to achieve axial sliding of the connecting tubing on the mounting plate.

[0013] In one possible implementation, the piping assembly further includes a positioning housing that engages with the piping working groove, the positioning housing having a piping groove inside which the infusion hose is secured; the positioning housing also has a limiting groove inside which the needle sleeve is secured to limit the axial displacement of the needle sleeve.

[0014] In one possible implementation, the drive unit includes a drive shaft rotatably disposed within the equipment cavity. One end of the drive shaft is connected to a control motor. A cam disk, coaxially and synchronously rotating with the drive shaft, is disposed on the drive shaft. A guide groove is eccentrically disposed on the cam disk. The guide groove is eccentrically disposed with the cam disk. A pin is disposed at one end of the extrusion plate opposite to the cam disk. The pin is slidably engaged with the guide groove. When the cam disk rotates, the extrusion plate can achieve reciprocating horizontal sliding by driving the pin through the guide groove.

[0015] In one possible implementation, the one-way valve unit includes a valve seat disposed within an infusion hose, the valve seat having a plurality of flow holes distributed on one side of the valve seat opposite to the connecting hose and an outlet on the other side, and also includes a valve disc disposed within the valve seat and conforming to the side of the valve seat opposite to the flow holes, the valve disc having a plurality of liquid passage ports, the liquid passage ports being offset from the flow holes.

[0016] Compared with the prior art, the beneficial effects of this application are as follows: This solution features a dual-compartment casing with a switching assembly for rapid switching of medication bags. The connection and disconnection of the connecting tubing and infusion tubing are accomplished mechanically, eliminating the need to disassemble the infusion tubing and needle tubing. Within the switching assembly, the mounting plate rotates via a drive mechanism to switch the connecting tubing position, while a sliding key moves the contact plate and limiting contact ring to achieve axial sliding of the connecting sleeve. The spare medication bag is pre-connected to the connecting tubing and switching assembly. No cumbersome procedures are required during dressing changes; switching is accomplished simply by operating the drive mechanism and sliding key, significantly improving dressing change speed and preventing delays in dressing changes in multi-patient care scenarios, thus significantly reducing the workload of pediatric medical staff. Simultaneously, it avoids interference from infants' unconscious movement and scratching during routine dressing changes.

[0017] Meanwhile, in the connection structure, the connecting sleeve has a built-in medical sealing diaphragm, which can seal the connecting tubing when not connected to prevent leakage and contamination of the medication; when connected, the needle tube of the needle sleeve penetrates the sealing diaphragm to achieve a sealed connection, reducing the probability of contamination at the tubing connection point. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a structural diagram of the pipeline assembly and pipeline working groove of the present invention; Figure 3 This is a diagram showing the internal structure of the device cavity in this invention; Figure 4 for Figure 3 Enlarged view of point A in the middle; Figure 5 This is an exploded view of the pipeline assembly in this invention; Figure 6 This is a diagram showing the connection structure between the infusion tubing and the connecting tubing in this invention; Figure 7 This is a partial cross-sectional view of the connection structure of the pipeline assembly in this invention; Figure 8 This is a structural diagram of the one-way valve unit in this invention; Figure 9 This is a diagram showing the internal structure of the herbal liquid reservoir in this invention; Figure 10 for Figure 9 Enlarged view of point B in the middle; Figure 11 This is a diagram showing the separation state of the infusion tubing and the connecting tubing in this invention; Figure 12 This is a partial cross-sectional view of the switching component in this invention; Figure 13 for Figure 12 Enlarged view of point C in the middle; Figure 14 This is an exploded view of the shell structure in this invention; Figure 15 for Figure 14 Enlarged view at point D; Figure 16 for Figure 14 Enlarged view at point E in the middle; Explanation of icon numbers: 01. Housing; 02. Piping assembly; 020. Infusion hose; 021. Connecting hose; 023. One-way valve unit; 0231. Valve seat; 0232. Flow hole; 0233. Outlet; 0234. Valve disc; 0235. Liquid passage; 024. Positioning housing; 0241. Piping groove; 0242. Limiting slot; 03. Switching assembly; 04. Power assembly; 040. Extrusion plate; 041. Drive shaft; 042. Control motor; 043. Cam plate; 044. Guide groove; 045. Pin; 046. Tactile switch; 047. Sensor; 1. Equipment cavity; 2. Piping working groove; 3. Medicine tank; 4. 5. Connecting port; 6. Conversion unit; 7. Mounting plate; 8. Drive component; 9. Slide groove; 10. Rotating shaft; 11. Gear; 12. Knob; 13. Insertion / removal unit; 14. Limiting abutment ring; 15. Sliding key; 16. Abutment plate; 17. Connecting sleeve; 18. Pin sleeve; 19. Needle tube; 20. Sealing diaphragm; 21. Main cover plate; 22. Secondary cover plate; 23. Spare housing; 24. Storage cavity; 25. Rotating part; 26. Rotating protrusion; 27. Limiting groove; 28. Mounting groove; 29. ​​Rotating groove; 20. Connecting protrusion; 21. Blockage alarm connector; 22. Elastic diaphragm; 23. Elastic protrusion switch; 24. Connecting groove. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0021] Reference Figures 1 to 16 This invention proposes an electric infusion pump for infants and young children, which includes a housing 01, as shown in the figure. Figure 1-3 As shown in Figures 9-10 and 14-16, the housing 01 includes a main body, on which are provided an equipment cavity 1, a pipeline working groove 2, two medicine liquid tanks 3, a connecting port 4, a cover plate, and a spare housing 12. The above components are injection molded from medical-grade ABS material, with rounded corners to facilitate movement and placement during clinical care of infants and young children, avoiding sharp corners from causing bumps and injuries to infants and young children. At the same time, it has good stain resistance and easy cleaning properties, meeting the requirements of clinical aseptic care.

[0022] Among them, such as Figure 9-10 As shown, two opposing liquid medicine chambers 3 are provided on the housing 01. The two liquid medicine chambers 3 are groove-shaped. The main cover plate 10 and the secondary cover plate 11 can be hinged to the housing 01 to seal the two liquid medicine chambers 3 to form a closed space. Both liquid medicine chambers 3 are used to hold liquid medicine bags. A connecting port 4 is provided between the two liquid medicine chambers 3 to connect the two spaces. The connecting hoses 021 of the liquid medicine bags extend to this point. At the same time, the inlet end of the pipeline working groove 2 is also provided at this point and is connected to the liquid medicine chamber 3, so as to facilitate connection with the switching component 03, facilitate insertion and removal of the infusion hose 020, and provide room for the connecting hose 021 to move during switching.

[0023] Specifically, the main cover plate 10 and the secondary cover plate 11 correspond to the two liquid medicine chambers 3, respectively, as follows: Figure 14-15 As shown, both the main cover plate 10 and the secondary cover plate 11 can be made of transparent plastic material, which makes it convenient for users to observe the amount of medicine in the medicine bag and for medical staff to promptly detect when the medicine is used up and prepare to switch.

[0024] Specifically, the main cover plate 10 and the secondary cover plate 11 are connected to the housing 01 in the same way. An integrally formed rotating part 14 is provided on one side edge of the cover plate. Rotating protrusions 15 are provided at both ends of the rotating part 14. A limiting groove 16 is provided on the housing 01 at the position opposite to the rotating part 14. Rotating grooves 18 that rotate and cooperate with the rotating protrusions 15 are provided on both sides of the limiting grooves 16 opposite to the rotating protrusions 15. Since the rotating protrusions 15 and the rotating grooves 18 are both made of plastic, they have a certain elastic deformation capability. Therefore, the assembly between the cover and the housing 01 can be achieved by snap-fit, and the rotation between the two can be guaranteed after assembly.

[0025] At the same time, such as Figure 16 As shown, to facilitate carrying more liquid medicine, a mounting groove 17 is provided on the edge of the secondary cover plate 11 away from the liquid medicine tank 3. A rotating part 14 extends from the edge of the spare shell 12 opposite to the mounting groove 17 towards the mounting groove 17. The connection structure and method between the rotating part 14 and the mounting groove 17 are the same as those between the cover plate and the shell 01. Connecting grooves 23 are provided at both ends of the rotating part 14, and connecting protrusions 19 are provided on the inner walls of both ends of the mounting groove 17, engaging with and rotating within the grooves. Since both the connecting protrusions 19 and the rotating part 14 are made of plastic... It has a certain elastic deformation capability, so the staff can apply a certain force to the spare shell 12 to realize the assembly and disassembly of the spare shell 12; and multiple spare shells 12 can be provided, with a connecting groove 23 arranged in the same direction as its rotating part 14 on the bottom edge of the spare shell 12; such a structure allows the user to adjust the number of spare shells 12 according to the number of medicine bags, thereby adjusting the number of storage cavities 13 formed between the spare shell 12 and the sub-cover plate 11 and between adjacent spare shells 12, making it more convenient for the user to carry and store the medicine bags and facilitate subsequent replacement.

[0026] Furthermore, to further improve the connection strength and stability between the spare shell 12 and the secondary cover plate 11, and between two adjacent spare shells 12, magnets can be installed on the spare shell 12 and the secondary cover plate 11. The magnets can stabilize the connection between the two, preventing the spare shell 12 from rotating without external force. The method and position of the magnets can be customized as needed, such as by creating magnet slots to embed the magnets into the spare shell 12 and the secondary cover plate 11, or by directly adhering them with glue. Therefore, this structure is not shown in the attached drawings.

[0027] Furthermore, all the spare shells 12 rotate to the same side. This structure allows users to easily open any of the storage chambers 13 to retrieve and place the medicine bags. Notes can be attached to the spare shells 12 to facilitate the identification of the type of medicine or the infusion sequence in each storage chamber 13.

[0028] like Figure 5-8As shown, the pipeline assembly 02 further includes an infusion hose 020, a connecting hose 021 matching the number of medicine bags, a connecting structure, a one-way valve unit 023, and a positioning housing 024; each connecting hose 021 corresponds to one medicine bag, one end of the connecting hose 021 is connected to the outlet of the medicine bag, and the other end extends to the connection port 4 and cooperates with the switching assembly 03; the infusion hose 020 is detachably snapped into the pipeline working groove 2 through the positioning housing 024, one end of which is detachably sealed and plugged into the connecting hose 021 through the connecting structure, and the other end is used to connect to the external needle hose. The infusion hose 020 does not need to be disassembled and replaced during use, and the on / off switching is completed only through the connecting structure and the connecting hose 021.

[0029] Both the connecting tubing 021 and the infusion tubing 020 are made of medical-grade silicone, which is soft, elastic, non-toxic, and odorless, and meets the medical standards for infants and young children.

[0030] Specifically, such as Figure 6-7 As shown, the connection structure includes a connecting sleeve 7 and a needle sleeve 8, both of which are made of medical-grade hard plastic, are high in strength and easy to clean. The connecting sleeve 7 is fixedly installed at the end of the connecting tubing 021 away from the drug bag, and the needle sleeve 8 is fixedly installed at the end of the infusion tubing 020 near the connecting port 4. A hollow needle tube 80 is provided on the side of the needle sleeve 8 facing the connecting sleeve 7. The needle tube 80 is made of medical-grade stainless steel or plastic, and its end is sharp and smooth, making it easy to pierce the sealing diaphragm 9. The end of the needle tube 80 is provided with an inlet, which is designed with a bevel to reduce the resistance to drug flow.

[0031] A medical-grade silicone sealing diaphragm 9 is provided at one end of the connecting sleeve 7 near the needle sleeve 8. The diaphragm 9 is soft and elastic and can tightly seal the end of the connecting tubing 021 when not punctured, preventing leakage of the drug bag or contamination of the tubing. The needle 80 can easily puncture the sealing diaphragm 9 and fits tightly with it after puncture, achieving a sealed connection between the connecting tubing 021 and the infusion tubing 020, preventing drug leakage.

[0032] To facilitate easy assembly and disassembly of the infusion tubing, and to ensure that the compression plate 040 in the power assembly 04 corresponds to the position of the infusion tubing after each assembly, guaranteeing that the compression plate 040 can accurately and stably compress the infusion tubing, the tubing assembly 02 is also equipped with a positioning shell 024 that engages with the tubing working groove 2. The positioning shell 024 is made of medical-grade hard plastic, and the positioning shell 024 and the tubing working groove 2 can be fixedly connected by a snap-fit ​​and slot method, allowing for quick snap-fit ​​fixing and disassembly / separation, greatly facilitating the assembly, disassembly, cleaning, and replacement of the infusion tubing 020. Regarding the connection structure between the positioning shell 024 and the housing 01, it is disclosed in the drawings of the novel electronic analgesia pump disclosed in application number 201420642869.1, and is prior art. Since this structure is not the direction of improvement in this application, it will not be elaborated further.

[0033] like Figure 5 As shown, the positioning housing 024 has a pipe groove 0241 inside for clamping the infusion hose 020. This groove can tightly clamp the infusion hose 020 and accurately position it. This ensures that after each assembly, the relative position of the infusion hose 020 and the compression plate 040 in the power assembly 04 remains consistent, preventing displacement of the infusion hose 020 that could cause compression deviation of the compression plate 040 and ensuring the stability and uniformity of the drug infusion.

[0034] Meanwhile, the positioning housing 024 is provided with a limiting slot 0242, and the pin sleeve 8 is fixedly engaged in the limiting slot 0242, which can effectively limit the axial displacement of the pin sleeve 8, avoid positional deviation during insertion and removal, and ensure the docking accuracy of the connecting sleeve 7 and the pin sleeve 8.

[0035] like Figure 7-8As shown, in this embodiment, a one-way valve unit 023 is also provided inside the infusion tubing 020. The one-way valve unit 023 is located in the tubing section between the connecting structure and the squeezing plate 040, allowing the medication to flow unidirectionally into the needle tubing only, preventing backflow of the medication or venous blood return, and protecting the thin and fragile veins of infants and young children. The one-way valve unit 023 includes a valve seat 0231 fixed inside the infusion tubing 020. The valve seat 0231 is made of medical-grade hard plastic and fits tightly against the inner wall of the infusion tubing 020. Several flow holes 0232 are evenly distributed on the side of the valve seat 0231 facing the connecting tubing 021, and an outlet 0233 is provided on the other side. The size of the outlet 0233 is larger than the total cross-sectional area of ​​the flow holes 0232, reducing the resistance to the flow of the medication. The device is equipped with a valve disc 0234 made of medical-grade silicone, which is soft and has good sealing performance. The valve disc 0234 has several liquid passage ports 0235, which are staggered with the flow holes 0232. When the medication flows forward, the hydraulic pressure pushes the valve disc 0234 towards the outlet 0233, aligning the liquid passage ports 0235 with the flow holes 0232 for smooth flow. If there is a tendency for blood or medication to flow back, the reverse pressure will cause the valve disc 0234 to tightly adhere to the valve seat 0231, blocking the misalignment of the liquid passage ports 0235 with the flow holes 0232. This fundamentally prevents venous backflow and tubing blockage in infants and young children, reduces the pain caused by repeated punctures, and avoids contamination by backflowing medication.

[0036] like Figure 9-13 As shown, as a key improvement of the present invention, in order to realize the replacement of the medicine bags in the two medicine tanks 3, a switching component 03 is provided at the communication port 4 inside the housing 01, which includes a conversion unit 5 and a plug-in unit 6; the conversion unit 5 includes a disc-shaped mounting plate 50 rotatably installed in the housing 01 via a rotating shaft 53. The mounting plate 50 is made of medical-grade hard plastic and its size is adapted to the communication port 4. The mounting plate 50 is rotatably connected to the housing 01 via the rotating shaft 53. A bearing is provided between the rotating shaft 53 and the mounting plate 50 to reduce rotational resistance and make the mounting plate 50 rotate smoothly.

[0037] Several grooves 52 are evenly distributed around the circumference of the mounting plate 50. The connecting sleeves 7 of the two connecting hoses 021 are respectively inserted into the grooves 52 and can slide freely along the axial direction of the grooves 52. At the same time, in order to prevent the connecting sleeves 7 from rotating in the grooves 52, a slight guide protrusion is provided on the inner wall of the grooves 52, and a corresponding guide groove is provided on the outer side of the connecting sleeves 7 to ensure the docking accuracy.

[0038] The mounting plate 50 is connected to a drive component 51, which adopts a knob 55 structure. A gear 54 is located at the end of the rotating shaft 53, and a knob 55, connected to the gear 54, is located outside the housing 01. The knob 55 can also be a gear 54 structure, with a portion protruding from the housing 01. The surface of the knob 55 has anti-slip textures for easy gripping and operation by medical personnel. Medical personnel can rotate the drive component 51 to synchronously rotate the mounting plate 50, rotating the target connecting sleeve 7 to the docking position opposite the insertion pin sleeve 8. During rotation... To achieve positioning, for example, a ratchet structure can be set between the mounting plate 50 and the housing 01, or a positioning protrusion corresponding to the position of the slide groove 52 can be set on the side of the mounting plate 50 opposite to the housing 01, and a positioning groove corresponding to the positioning protrusion can be set on the housing 01. Since the positioning protrusion is made of plastic, it has a certain elastic deformation capability. Through the cooperation of the positioning protrusion and the positioning groove, tactile feedback can be achieved and the mounting plate 50 can be ensured not to rotate freely without external force, thus avoiding docking misalignment caused by the random rotation of the mounting plate 50.

[0039] Furthermore, such as Figure 12-13 As shown, the insertion and removal unit 6 includes a sliding key 61 that is slidably disposed on the housing 01 and corresponds to the position of the mounting plate 50. Specifically, the sliding key 61 is disposed on the main cover plate 10 and is made of medical-grade hard plastic. The surface is also provided with anti-slip texture for easy operation. A slide rail is provided on the housing 01 at the position corresponding to the sliding key 61. A slider adapted to the slide rail is provided at the bottom of the sliding key 61 to realize the smooth sliding of the sliding key 61. At the same time, limit blocks are provided at both ends of the slide rail to prevent the sliding key 61 from sliding excessively, which would cause the connecting sleeve 7 and the insertion pin sleeve 8 to be too tightly connected, damaging the sealing diaphragm 9, or cause leakage due to incomplete separation.

[0040] A pair of abutment plates 62 protruding from the side of the sliding key 61 facing the mounting plate 50 are distributed along the length of the connecting hose 021. The abutment plates 62 and the sliding key 61 are integrally formed and have high strength. A limiting abutment ring 60 is integrally formed on the outer circumference of the connecting sleeve 7. The diameter of the limiting abutment ring 60 is larger than the diameter of the connecting sleeve 7. It is located on the side of the mounting plate 50 near the liquid tank 3. When the connecting sleeve 7 rotates with the mounting plate 50 to the docking position, the limiting abutment ring 60 will be positioned between the pair of abutment plates 62. The distance between the pair of abutment plates 62 is greater than the thickness of the limiting abutment ring 60, so that when the main cover plate 10 is opened, there will be no interference with the limiting abutment ring 60.

[0041] The sliding key 61 can slide closer to or further away from the infusion tubing 020. Through the abutment cooperation between the abutment plate 62 and the limiting abutment ring 60, the connecting sleeve 7 is driven to slide axially within the sliding groove 52. When it slides closer to the needle sleeve 8, the two are connected. When it slides further away from the needle sleeve 8, the two are pulled out and separated. The operation is convenient and labor-saving, requiring no complicated skills, and medical staff can quickly get started.

[0042] like Figure 2-4 As shown, the power assembly 04 is installed in the equipment cavity 1 inside the housing 01. The inner wall of the equipment cavity 1 is provided with sound insulation cotton to reduce the noise when the motor is working and avoid noise stimulation to infants and young children.

[0043] Specifically, the power assembly 04 includes a drive unit and a compression plate 040; a compression port is provided between the device cavity 1 and the pipeline working groove 2. The compression plate 040 is made of medical-grade hard plastic with a smooth surface and is slidably disposed in the device cavity 1. One end of the plate can pass through the compression port and slide horizontally back and forth relative to the pipeline working groove 2 to continuously peristaltically compress the infusion tubing 020. A sealing gasket can be provided between the compression plate 040 and the compression port to prevent dust from entering the device cavity 1.

[0044] The drive unit includes a drive shaft 041 rotatably disposed within the equipment cavity 1, with both ends rotatably connected to the inner wall of the equipment cavity 1 via bearings, ensuring smooth rotation. One end of the drive shaft 041 is connected to a control motor 042, which is a miniature stepper motor, small in size, with precise speed and low noise, suitable for miniaturized infusion pumps and the needs of infant and toddler scenarios. The control motor 042 is fixedly installed on the inner wall of the equipment cavity 1. A cam disk 043, made of hard plastic and made of hard plastic, is fixedly mounted on the drive shaft 041 and rotates synchronously with it. An eccentric guide groove 044 is provided on the cam disk 043. A pin 045 is provided at one end of the extrusion plate 040 opposite to the cam disk 043. The pin 045 is integrally formed with the extrusion plate 040 and slides with the eccentric guide groove 044. The inner wall of the guide groove 044 is smooth, reducing sliding resistance.

[0045] When the control motor 042 is working, it drives the drive shaft 041 and the cam disk 043 to rotate synchronously. The eccentric guide groove 044 drives the extrusion plate 040 to slide horizontally back and forth through the pin shaft 045. The extrusion frequency can be controlled by adjusting the motor speed, thereby controlling the drug infusion speed and achieving stable extrusion of the infusion tubing 020. This ensures uniform and micro-volume drug infusion, adapting to the different drug infusion needs of infants and young children.

[0046] In this embodiment, a one-way valve unit 023 is also provided inside the infusion tubing 020. The one-way valve unit 023 is located in the tubing section between the connecting structure and the compression plate 040, allowing only the medication to flow unidirectionally into the needle tubing, preventing backflow of medication or venous blood return, and protecting the thin and fragile veins of infants and young children. The one-way valve unit 023 includes a valve seat 0231 fixed inside the infusion tubing 020. The valve seat 0231 is made of medical-grade hard plastic and fits tightly against the inner wall of the infusion tubing 020. The valve seat 0231 has several flow holes 0232 evenly distributed on the side facing the connecting tubing 021, and an outlet 0233 is provided on the other side. The size of the outlet 0233 is larger than the total cross-sectional area of ​​the flow holes 0232, reducing the amount of medication flowing into the tubing. Fluid flow resistance; a valve disc 0234 is movably installed inside the valve seat 0231. The valve disc 0234 is made of medical-grade silicone, which is soft and has good sealing performance. Several liquid passage ports 0235 are opened on the valve disc 0234, and the liquid passage ports 0235 and the flow holes 0232 are staggered. When the medicine flows forward, the hydraulic pressure pushes the valve disc 0234 to move towards the outlet 0233, so that the liquid passage ports 0235 and the flow holes 0232 are aligned and connected, and the medicine can pass smoothly. If there is a tendency for blood or medicine to flow back, the reverse pressure will make the valve disc 0234 tightly fit the valve seat 0231, and the liquid passage ports 0235 and the flow holes 0232 will be staggered and blocked, thus avoiding venous backflow and tubing blockage in infants and young children from the root.

[0047] like Figure 1-3 As shown, a circuit board with a display is also fixedly installed inside the device cavity 1. The circuit board is fixed to the inner wall of the device cavity 1 by a bracket and is electrically connected to the control motor 042, forming the core control mechanism of the infusion pump. The display is embedded in the preset mounting hole on the surface of the housing 01 and is flush with the surface of the housing 01, which makes it easy for medical staff to observe the infusion parameters. At the same time, the display adopts a waterproof design to prevent liquid from seeping in and damaging it during cleaning and disinfection. It can display key information such as the infusion working status and infusion rate in real time, so that medical staff can keep abreast of the infusion situation.

[0048] The circuit board also integrates a tactile switch 046, a sensor 047, and a blockage alarm structure that is linked to the infusion pipeline, which extend into the pipeline working groove 2. Each component is connected to the circuit board circuit to realize the on / off control, status detection and abnormal alarm of the equipment. The overall structure is adapted to the miniaturized design of the infusion pump and is compatible with the existing pipeline and power component 04 structure to ensure the stability of the linkage.

[0049] The tactile switch 046 corresponds to the mounting position of the positioning housing 024 inside the pipeline working groove 2. Referring to the structure design of the raised button, it is a flexible raised structure. When the positioning housing 024 is properly engaged with the pipeline working groove 2 and the infusion tubing 020 is assembled, the positioning housing 024 will press the tactile switch 046 into place. After the circuit board receives the circuit connection signal, it confirms that the infusion pipeline assembly is qualified, and the equipment can then start the power component 04 for infusion operation. If the positioning housing 024 is not properly installed or the infusion tubing 020 is not securely engaged, the tactile switch 046 will be in the flexible raised open state. The circuit board will cut off the starting circuit of the control motor 042, and the infusion pump will not start. Structurally, this avoids squeezing deviations, drug leakage, or infusion failures caused by improper pipeline assembly. It also further ensures that the position of the infusion tubing 020 and the squeezing plate 040 is accurately aligned after each assembly, improving infusion stability.

[0050] like Figure 5-6 As shown, the blockage alarm structure uses a blockage alarm connector 20, in which the elastic diaphragm 21 is linked with the elastic protrusion switch 22. The blockage alarm connector 20 is located between the infusion tubing 020 and the needle tubing, and is adapted to the tubing direction of the infusion tubing 020. The elastic protrusion switch 22 is integrated on the circuit board corresponding to the position of the elastic diaphragm 21 and protrudes into the positioning housing 024. The two are set opposite each other and have a reasonable triggering distance. When the tubing is bent, the needle is blocked, or the medicine flows back during the infusion process, the pressure of the medicine in the infusion tubing 020 will increase sharply, which will squeeze the elastic diaphragm 21 and make it bulge towards the elastic protrusion switch 22. When the elastic diaphragm 21 bulges to the preset position, it will touch the elastic protrusion switch 22 and make it close. After receiving the signal, the circuit board immediately determines that the tubing is blocked and triggers the alarm program.

[0051] Meanwhile, the circuit board also integrates sensor 047, which is set to the squeeze section of the infusion tubing 020. Sensor 047 is used to assist in detecting the peristalsis status and remaining liquid in the infusion tubing 020. Together with the blockage alarm structure, it forms a dual detection system, improving the accuracy of abnormal judgment and avoiding false alarms.

[0052] Sensor 047 is a medical-grade infrared transmission fluid flow sensor that directly detects the liquid inside the infusion tubing 020 through the tubing wall. It does not contact the medication itself, and the detection signal acts directly on the liquid inside the tubing. This meets the requirements for aseptic infusion in clinical settings and accurately captures the flow, velocity, and presence of the liquid. It can also assist in verifying the signal of the blockage alarm structure, improving the accuracy of anomaly detection. Sensor 047 is fixed inside the tubing working groove 2. The infrared emitter and receiver of sensor 047 are tightly attached to both sides of the infusion tubing 020. The infrared light can directly penetrate the medical-grade silicone tubing wall of 020 to directly detect the liquid inside the tubing. Sensor 047 is electrically connected to the circuit board, and its detection signal can be transmitted to the circuit board for processing in real time.

[0053] When the power component 04 drives the squeezing plate 040 to squeeze the infusion tubing 020, the liquid inside the tubing flows at a uniform speed. The intensity of the infrared light passing through the flowing liquid will form a regular and subtle change that matches the liquid flow speed. The sensor 047 converts this light signal change into an electrical signal and transmits it to the circuit board. The circuit board directly calculates the actual infusion speed of the liquid inside the tubing based on the change pattern of the electrical signal according to the preset medical liquid calibration parameters, and displays this value on the display panel in real time, realizing direct, accurate detection and visualization of the infusion speed. Meanwhile, sensor 047 can directly detect whether there is liquid in the tube and whether the liquid flow is continuous. When the tube is blocked, the liquid flow in the tube will suddenly stop, and the light signal captured by the receiver will instantly become stable and unchanged. When the medicine is used up, there is no liquid in the tube, and the infrared light directly penetrates the empty tube wall, and the light intensity will change drastically. Sensor 047 can quickly capture such abnormal signals and transmit them to the circuit board. Together with the pressure signal of the elastic protrusion switch 22 of the blockage alarm structure, it forms a dual detection and verification, which greatly improves the accuracy of the equipment in judging abnormal situations such as blockage and medicine being used up, and effectively avoids the problem of false alarms caused by a single detection structure.

[0054] In addition, the circuit board is also linked with the operation buttons on the surface of the housing 01. Medical staff can use the operation buttons to perform operations such as adjusting the infusion rate and starting and stopping the equipment. The operation signal is processed by the circuit board and transmitted to the control motor 042 to achieve precise control of the motor speed and start and stop. After the motor speed is adjusted, the reciprocating frequency of the squeezing plate 040 changes synchronously, and the fluid flow speed in the tubing also changes accordingly. The sensor 047 can directly detect the change in the fluid flow speed in the tube in real time, transmit the new detection signal to the circuit board and quickly calculate the actual infusion rate, which is dynamically updated on the display to ensure the accuracy and visualization of the infusion rate adjustment.

[0055] In this application, the infusion tubing 020, the connecting tubing 021, and the medicine bag are all disposable items. Each medicine bag corresponds to one infusion tubing 020 and one connecting tubing 021. The connecting tubing 021 and the medicine bag are fixedly connected. As for the infusion tubing 020, when multiple bags of medicine need to be injected, only one bag of infusion tubing 020 needs to be opened.

[0056] Assembly preparation: Place the medicine bags into the two medicine compartments 3 of the housing 01 and the storage cavity 13 of the spare housing 12, and label the medicine information; connect the two connecting hoses 021 to the corresponding medicine bags respectively, and insert the connecting sleeves 7 into the sliding grooves 52 of the mounting plate 50 of the switching component 03; insert the infusion hose 020 into the pipeline groove 0241 of the positioning housing 024, insert the needle sleeve 8 into the limit slot 0242, and then connect the positioning housing 024 and the pipeline working groove 2 into place, squeeze the light touch switch 046 to close it, confirm that the position of the infusion hose 020 corresponds to the position of the squeeze plate 040, and the infusion pump can be started.

[0057] Pathway connection: Rotate the knob 55 of the switching component 03 to drive the installation plate 50 to rotate, and rotate the target connecting sleeve 7 to the position facing the needle sleeve 8; slide the sliding key 61 on the main cover plate 10, and push the connecting sleeve 7 towards the needle sleeve 8 through the abutment plate 62, so that the needle tube 80 pierces the sealing diaphragm 9, and achieves sealed connection between the connecting hose 021 and the infusion hose 020.

[0058] Normal infusion: The control motor 042 is started by the operation button. The motor drives the drive shaft 041 and the cam disk 043 to rotate. The cam disk 043 drives the extrusion plate 040 to slide back and forth through the eccentric guide groove 044, continuously extruding the infusion tubing 020. The medicine flows through the connecting tubing 021, the connecting structure, the one-way valve unit 023 (forward conduction), and the infusion tubing 020 to the needle tubing, completing the infusion for infants and young children. The sensor 047 detects the fluid flow status and infusion speed in real time, and the data is transmitted to the circuit board and displayed on the display panel.

[0059] Medication switching: When the current medication bag is used up, slide the sliding key 61 in the opposite direction to drive the connecting sleeve 7 to disengage from the insertion sleeve 8, and the sealing diaphragm 9 closes to prevent leakage; rotate the drive component 51 to switch the installation plate 50 position, turn the connecting sleeve 7 corresponding to the spare medication bag to the docking position, and push the sliding key 61 again to complete the insertion, realizing rapid switching of medication bags without disassembling the infusion tubing 020 throughout the process.

[0060] Abnormal Handling: If the positioning housing 024 is not installed in place, the tactile switch 046 will be disconnected, and the infusion pump will not start; if the infusion line is blocked or bent, the pressure inside the line will increase suddenly, squeezing the elastic diaphragm 21 and triggering the elastic protrusion switch 22, which will activate the blockage alarm on the circuit board; the sensor 047 and the blockage alarm structure will perform dual detection to avoid false alarms.

[0061] After use: turn off the control motor 042, disconnect the needle tubing from the infusion tubing 020; disassemble the positioning housing 024 and the infusion tubing 020 for cleaning and disinfection, and replenish the medicine bag for the next use.

[0062] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0063] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An electric infusion pump for infants, characterized in that, include: The housing (01) has an internal equipment cavity (1) and an external surface with a pipeline working groove (2) and two liquid medicine tanks (3). The two liquid medicine tanks (3) are used to place external liquid medicine bags. A connecting port (4) is also provided between the two liquid medicine tanks (3). The connecting port (4) is located at the inlet end of the pipeline working groove (2). The tubing assembly (02) includes an infusion tubing (020) and a connecting tubing (021). Each connecting tubing (021) corresponds to a medicine bag. The infusion tubing (020) is detachably installed in the tubing working groove (2). One end of the infusion tubing (020) is connected to the connecting tubing (021) through a connecting structure to connect to the corresponding medicine bag, and the other end is connected to an external needle tubing. The infusion tubing (020) and the connecting tubing (021) are detachably connected. The switching component (03), which is located at the connection port (4), includes a conversion unit (5) and a plug-in / plug-out unit (6); the end of each connecting hose (021) away from the medicine bag is slidably disposed on the conversion unit (5), the conversion unit (5) is used to control the connecting hose (021) to move to the inlet end of the pipeline working groove (2) to achieve the position corresponding to the infusion hose (020); the plug-in / plug-out unit (6) is used to push the end of the connecting hose (021) away from the medicine bag away from the infusion hose (020) to move away from or close to the infusion hose (020) to achieve plugging or unplugging separation from the infusion hose (020); The power assembly (04) is located in the equipment cavity (1); it includes a drive unit and a compression plate (040) connected to the drive unit; a compression port is provided between the equipment cavity (1) and the pipeline working groove (2); the compression plate (040) is slidably located in the equipment cavity (1), and one end of it can slide horizontally back and forth relative to the pipeline working groove (2) through the compression port to realize continuous compression of the infusion hose (020).

2. The electric infusion pump for infants and young children according to claim 1, characterized in that, The tubing assembly (02) further includes a one-way valve unit (023) disposed within the infusion tubing (020). The one-way valve unit (023) is arranged in the infusion tubing (020) between the connecting tubing (021) and the compression plate (040). The one-way valve unit (023) is used to allow the fluid in the infusion tubing (020) to flow unidirectionally towards the needle tubing.

3. The electric infusion pump for infants and young children according to claim 2, characterized in that, The connection structure includes a connecting sleeve (7) and a needle sleeve (8) that are respectively connected to the ends of the connecting hose (021) and the infusion hose (020). One end of the needle sleeve (8) is provided with a needle tube (80) that can be inserted and mated with the connecting sleeve (7). The needle tube (80) is hollow and has an inlet at one end relative to the connecting sleeve (7).

4. The electric infusion pump for infants and young children according to claim 3, characterized in that, The connecting sleeve (7) is fixed to the end of the connecting tubing (021), and the needle sleeve (8) is fixed to the end of the infusion tubing (020). The connecting structure also includes a sealing diaphragm (9) disposed in the connecting sleeve (7). The sealing diaphragm (9) is disposed at one end of the connecting sleeve (7) relative to the needle sleeve (8), and is used to seal the connecting tubing (021) to prevent leakage of the drug bag. The needle tube (80) on the needle sleeve (8) can pass through the sealing diaphragm (9) to achieve communication between the connecting tubing (021) and the infusion tubing.

5. An electric infusion pump for infants and young children according to claim 1, characterized in that, The housing (01) is provided with openings corresponding to two liquid medicine chambers (3) and two cover plates for sealing the openings. The two cover plates are snapped into the housing (01). The cover plates include a main cover plate (10) and a secondary cover plate (11). A spare housing (12) is rotatably connected to the edge of the secondary cover plate (11) away from the liquid medicine chamber (3). The spare housing (12) and the secondary cover plate (11) form a storage cavity (13) for accommodating the liquid medicine bag.

6. An electric infusion pump for infants and young children according to claim 4, characterized in that, The pin sleeve (8) is fixed inside the pipeline working groove (2); the conversion unit (5) includes, The mounting plate (50) is rotatably mounted in the housing (01) via a rotating shaft (53). The mounting plate (50) is disc-shaped, and its circumferential edge is equidistantly distributed with sliding grooves (52). The connecting sleeve (7) is inserted into the sliding groove (52), and the connecting sleeve (7) can slide back and forth relative to the pin sleeve (8) in the sliding groove (52) under the action of the insertion and removal unit (6) to achieve insertion or separation. The drive unit (51) is connected to the mounting plate (50) and at least partially passes through the housing (01) to the outside. It is used to control the rotation of the mounting plate (50) so that the corresponding connecting hose (021) can be rotated to the position of the infusion hose (020).

7. An electric infusion pump for infants and young children according to claim 6, characterized in that, The connecting sleeve (7) is provided with an outwardly extending limiting abutment ring (60) on the outer circumference. The limiting abutment ring (60) is located on the side of the mounting plate (50) near the liquid tank (3). The insertion and removal unit (6) includes a sliding key (61) slidably disposed on the housing (01) and corresponding to the position of the mounting plate (50). The sliding key (61) has a pair of abutment plates (62) protruding on one side of the mounting plate (50) along the length direction of the connecting sleeve (7). When the limiting abutment ring (60) is rotated to correspond to the position of the infusion hose (020), the limiting abutment ring (60) is located between the pair of abutment plates (62). The sliding key (61) can move away from or closer to the infusion hose (020) to drive the abutment plate (62) to abut against the limiting abutment ring (60) to achieve axial sliding of the connecting hose (021) on the mounting plate (50).

8. An electric infusion pump for infants and young children according to claim 6, characterized in that, The pipeline assembly (02) also includes a positioning housing (024) that engages with the pipeline working groove (2). The positioning housing (024) has a pipeline groove (0241) inside, and the infusion hose (020) is inserted into the pipeline groove (0241). The positioning housing (024) also has a limiting groove (0242) inside, and the needle sleeve (8) is inserted into the limiting groove (0242) to limit the axial displacement of the needle sleeve (8).

9. An electric infusion pump for infants and young children according to claim 1, characterized in that, The drive unit includes a drive shaft (041) rotatably disposed in the equipment cavity (1). One end of the drive shaft (041) is connected to a control motor (042). A cam disk (043) is disposed on the drive shaft (041) and rotates synchronously with it. A guide groove (044) is eccentrically disposed on the cam disk (043). The guide groove (044) is eccentrically disposed with the cam disk (043). A pin (045) is disposed at one end of the extrusion plate (040) relative to the cam disk (043). The pin (045) is slidably engaged with the guide groove (044). When the cam disk (043) rotates, the extrusion plate (040) drives the pin (045) through the guide groove (044), thereby realizing the reciprocating horizontal sliding of the extrusion plate (040).

10. An electric infusion pump for infants and young children according to claim 2, characterized in that, The one-way valve unit (023) includes a valve seat (0231) disposed in the infusion hose (020). The valve seat (0231) has a plurality of flow holes (0232) distributed on one side of the connecting hose (021) and an outlet (0233) disposed on the other side. It also includes a valve disc (0234) disposed in the valve seat (0231) and able to fit against the side of the valve seat (0231) opposite to the flow holes (0232). The valve disc (0234) has a plurality of liquid passages (0235) disposed on it. The liquid passages (0235) are misaligned with the flow holes (0232).

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