Multi-flow-velocity infusion pump with compact structure

Abstract

A multi-flow-velocity infusion pump with a compact structure comprises a protection bottle, a flow velocity regulator, an outer three-way connector, a liquid outlet connector and a protection cap, a sliding rod sleeve connected with an elastic liquid storage bag in a sliding mode is arranged at the top of the flow velocity regulator, a medicine adding hole and a liquid outlet hole are formed in the bottom of the sliding rod sleeve, and the liquid adding connector is connected with the medicine adding hole; a sliding rod is slidably arranged in the sliding rod sleeve; a liquid medicine filter is embedded in the flow speed regulator, a liquid inlet of the liquid medicine filter is connected with the liquid outlet hole, and a liquid outlet of the liquid medicine filter is connected with a regulating inlet of the flow speed regulator through a micropore pipe and is connected with the outer three-way connector through a flow limiting pipe and an automatic control assembly. Liquid medicine firstly passes through the liquid medicine filter and then enters the microporous pipe and the flow limiting pipe, so that the risk of pipeline blockage is avoided; the liquid medicine filter is embedded in the flow speed regulator, meanwhile, the self-control assembly is arranged near the flow speed regulator, and a pipeline is shortened, so that the probability of collision or pulling in the moving process is reduced, and the infusion safety is improved.

Description

Technical Field

[0001] This invention relates to the field of infusion pump technology, specifically to a compact multi-flow rate infusion pump. Background Technology

[0002] In the prior art, CN120053809A discloses an adjustable flow rate infusion pump and its flow rate regulator. Although it can achieve different flow rate adjustments, its flow path design involves the liquid medicine first flowing through a microporous tube and then through a liquid medicine filter. Under this design, particles that may be present in the liquid medicine may clog the microporous tube, affecting the long-term stability of the infusion flow rate. In addition, the liquid medicine filter and the automatic control component are located in the pipeline off-center from the bottle, making the pipeline relatively long and prone to collisions or pulling during movement, affecting infusion safety. Summary of the Invention

[0003] Therefore, the purpose of this invention is to provide a compact multi-flow rate infusion pump to avoid the risk of pipeline blockage, while improving integration and shortening the pipeline for easy portability.

[0004] A compact multi-flow rate infusion pump includes a protective bottle, a flow rate regulator located at the bottom of the protective bottle, and an external tee connector, a liquid outlet connector, and a protective cap sequentially connected to the flow rate regulator via a hose. The top of the flow rate regulator is provided with a sliding rod sleeve that is slidably connected to an elastic reservoir. The bottom of the sliding rod sleeve is provided with a dosing hole and a liquid outlet port. The liquid outlet connector passes through the flow rate regulator and is connected to the dosing hole. A slide rod is slidably provided in the slide rod sleeve, and one end of the elastic liquid storage bladder is fixed to the bottom of the slide rod sleeve, and the other end is fixed to the top of the slide rod; The flow rate regulator is equipped with a liquid medicine filter. The inlet of the liquid medicine filter is connected to the outlet. The outlet of the liquid medicine filter is connected to the regulating inlet of the flow rate regulator through a microporous tube, and is also connected to the external tee connector through a flow limiting tube and an automatic control component.

[0005] Preferably, the liquid filter has three outlet holes, and the flow rate regulator has three inlet holes; One of the outlets is connected to the internal tee connector, which is then connected to the flow-limiting tube and a microporous tube. The other two outlets are connected to the two microporous tubes, and the three microporous tubes are connected to the three inlet holes.

[0006] Preferably, the liquid filter has four outlets, one of which is connected to the flow limiting tube, and the other three outlets are connected to three microporous tubes respectively.

[0007] Preferably, the liquid filter has an outlet that is connected to the inlet of an internal tee connector. One outlet of the internal tee connector is connected to the microporous tube, and the other outlet is connected to the flow limiting tube.

[0008] Preferably, the drug filter includes a first housing and a second housing that are snapped together, and a filter membrane embedded between the first housing and the second housing; The first housing is provided with a liquid inlet, and the second housing is provided with a liquid outlet. The liquid outlet and the liquid inlet are located at opposite ends of the liquid filter.

[0009] Preferably, the second housing is provided with multiple support ribs, and the top of each support rib is in contact with the filter membrane.

[0010] Preferably, the flow rate regulator includes an upper seat and a base connected together, a knob is rotatably connected to the bottom of the base, and a sealing gasket is embedded between the knob and the base; The upper seat is connected to the slide sleeve, and the liquid filter is located between the upper seat and the base.

[0011] Preferably, the upper seat is provided with a support plate, the support plate includes a support groove and an annular wall that is connected to the groove wall of the support groove in an arc transition manner, the top edge of the annular wall is connected to the inner wall of the upper seat, and the slide rod sleeve is installed in the support groove.

[0012] Preferably, the bottom of the support groove is provided with a mounting hole, and the side wall of the mounting hole is provided with a limiting groove; The bottom side wall of the slide sleeve is provided with a limiting rib, which is located in the limiting groove.

[0013] Preferably, the base has a support platform inside, and a receiving space is formed between the support platform and the support plate, in which the medicine filter is inserted.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: First, the liquid medicine passes through the liquid medicine filter before entering the microporous tube and the flow limiting tube, thereby avoiding the risk of pipeline blockage; Secondly, by embedding the drug solution filter inside the flow rate regulator and placing the automatic control component near the flow rate regulator, the integration is improved, the pipeline is shortened, and the device is made easier to carry, thereby reducing the probability of collisions or pulling during movement and improving infusion safety. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the compact multi-flow rate injection pump of the present invention; Figure 2 This is a cross-sectional view of the compact multi-flow rate injection pump of the present invention; Figure 3 This is a schematic diagram of the pipeline connection between the liquid medicine filter and the flow regulator in this invention; Figure 4 This is a schematic diagram of the pipeline connection between the liquid medicine filter and the flow regulator in one embodiment of the present invention; Figure 5 This is a schematic diagram of the pipeline connection between the liquid medicine filter and the flow regulator in one embodiment of the present invention; Figure 6 For the present invention Figure 2 Schematic diagram of the structure of a traditional Chinese medicine liquid filter; Figure 7 For the present invention Figure 2 Schematic diagram of the upper and middle seats; Figure 8 For the present invention Figure 2 Schematic diagram of the middle base; Figure 9 For the present invention Figure 2 Cross-sectional view of the liquid filling connector.

[0016] Explanation of key component symbols: 11-Bottle protector; 12-Flow rate regulator; 121-Upper seat; 1211-Support plate; 12111-Support groove; 12112-Annular wall; 12113-Mounting hole; 12114-Limiting groove; 122-Base; 1221-Support platform; 123-Knob; 124-Sealing gasket; 13-Hose; 14-External tee connector; 15-Dispensing connector; 16-Cap protector; 17-Elastic reservoir; 18-Slide rod sleeve; 181-Dosing port; 182 - Liquid outlet; 183-Limiting rib; 19-Liquid filling connector; 191-Duckbill valve; 20-Slide rod; 21-Medicine filter; 211-First housing; 2111-Liquid inlet; 212-Second housing; 2121-Liquid outlet; 2122-Support rib; 213-Filter membrane; 21a-Outlet; 21b-Outlet; 21c-Outlet; 22-Microporous tube; 23-Flow limiting tube; 24-Automatic control component; 25-Internal tee connector; 25c-Internal tee connector.

[0017] The following detailed description, in conjunction with the accompanying drawings, will further illustrate the present invention. Detailed Implementation

[0018] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0019] Please see Figures 1 to 3An embodiment of the present invention provides a compact multi-flow rate infusion pump, including a protective bottle 11, a flow rate regulator 12 disposed at the bottom of the protective bottle 11, and an external tee connector 14, a liquid outlet connector 15, and a protective cap 16 sequentially connected to the flow rate regulator 12 via a hose 13. The top of the flow rate regulator 12 is provided with a slide rod sleeve 18 that is slidably connected to an elastic reservoir 17. The bottom of the slide rod sleeve 18 is provided with a dosing hole 181 and a liquid outlet port 182. The liquid outlet connector 19 passes through the flow rate regulator 12 and is connected to the dosing hole 181. A slide rod 20 is slidably disposed in the slide rod sleeve 18, and one end of the elastic liquid storage bladder 17 is fixed to the bottom of the slide rod sleeve 18 and the other end is fixed to the top of the slide rod 20. The flow rate regulator 12 is equipped with a liquid medicine filter 21. The inlet of the liquid medicine filter 21 is connected to the outlet hole 182. The outlet of the liquid medicine filter 21 is connected to the regulating inlet of the flow rate regulator 12 through a microporous tube 22, and is also connected to the external tee connector 14 through a flow limiting tube 23 and an automatic control component 24.

[0020] It should be noted that in this invention, the self-control component 24 is used to immediately inject 0.5 mL of medication into the body with each press when the patient is in pain. The flow-limiting tube 23 is used to control the refilling time of the 0.5 mL medication in the self-control component 24, preventing the patient from pressing the pump indiscriminately to add more medication.

[0021] Please see Figure 2 and Figure 3 In a preferred embodiment of the present invention, the liquid filter 21 is provided with three outlet holes 21a, and the flow rate regulator 12 includes three inlet holes. One of the outlet holes 21a is connected to the internal tee connector 25, and then to the flow limiting tube 23, and at the same time to a microporous tube 22. The other two outlet holes are connected to two microporous tubes 22 respectively, and the three microporous tubes 22 are connected to three inlet holes respectively.

[0022] Please see Figure 4 In a preferred embodiment of the present invention, the liquid filter 21 is provided with four outlet holes 21b, one of which is connected to the flow limiting tube 23, and the other three outlet holes 21b are connected to three microporous tubes 22 respectively.

[0023] Please see Figure 5 In a preferred embodiment of the present invention, the liquid filter 21 is provided with an outlet 21c, which is connected to the inlet of the internal tee connector 25c. One outlet of the internal tee connector 25c is connected to the microporous tube 22, and the other outlet is connected to the flow limiting tube 23.

[0024] Please see Figure 2 , Figure 3 and Figure 6 In a preferred embodiment of the present invention, the liquid medicine filter 21 includes a first housing 211 and a second housing 212 that are fastened together, and a filter membrane 213 embedded between the first housing 211 and the second housing 212. The first housing 211 is provided with a liquid inlet 2111, and the second housing 212 is provided with a liquid outlet 2121. The liquid outlet 2121 and the liquid inlet 2111 are located at both ends of the medicine filter 21 to facilitate the flow of medicine.

[0025] Please see Figure 6 In a preferred embodiment of the present invention, the second housing 212 is provided with a plurality of support ribs 2122, the top of each support rib 2122 is in contact with the filter membrane 213, and the filter membrane 213 is supported by the support ribs 2122 to prevent the filter membrane 213 from "collapse" and affecting the liquid output.

[0026] Please see Figure 2 In a preferred embodiment of the present invention, the flow rate regulator 12 includes an upper seat 121 and a base 122 connected to each other. A knob 123 is rotatably connected to the bottom of the base 121, and a sealing gasket 124 is embedded between the knob 123 and the base 122. The upper seat 121 is connected to the slide sleeve 18, and the liquid medicine filter 21 is located between the upper seat 121 and the base 122.

[0027] It should be noted that the flow rate adjustment method in this invention is the same as that in the prior art (publication number CN120053809A). Specifically, by arranging and combining channels at rates of 0 mL / h, 2 mL / h, 4 mL / h, and 8 mL / h, different flow rates of 0 mL / h, 2 mL / h, 4 mL / h, 6 mL / h, 8 mL / h, 10 mL / h, 12 mL / h, and 14 mL / h are achieved. Similarly, when the flow rates of the three microporous tubes 22 are other values, they can also be arranged to switch between different flow rates. For example, when the flow rates of the three microporous tubes 22 are 1 mL / h, 2 mL / h, and 4 mL / h, flow rates of 0 mL / h, 1 mL / h, 2 mL / h, 3 mL / h, 4 mL / h, 5 mL / h, 6 mL / h, and 7 mL / h can be achieved.

[0028] Please see Figure 2 and Figure 7In a preferred embodiment of the present invention, the upper seat 121 is provided with a support plate 1211, the support plate 1211 includes a support groove 12111 and an annular wall 12112 connected to the groove wall of the support groove 12111 in an arc transition manner, the top edge of the annular wall 12112 is connected to the inner wall of the upper seat 121, and the slide sleeve 18 is installed in the support groove 12111.

[0029] It should be noted that in this embodiment, the annular wall 12112 is inclined upward, which allows sufficient space to be left between the support plate 1211 and the base 121 for installing the liquid filter 21.

[0030] Please see Figure 7 In a preferred embodiment of the present invention, the bottom of the support groove 12111 is provided with a mounting hole 12113, and the side wall of the mounting hole 12113 is provided with a limiting groove 12114. The bottom side wall of the slide sleeve 18 is provided with a limiting rib 183, which is located in the limiting groove 12114 to limit the radial position of the slide sleeve 18 and prevent the position from deviating.

[0031] Understandably, in this embodiment, there are four limiting ribs 183 and four limiting grooves 12114. In other embodiments, there is at least one limiting rib 183 and one limiting groove 12114, and the specific number can be set according to actual needs.

[0032] Please see Figure 2 In a preferred embodiment of the present invention, the slide sleeve 18 and the base 121 are separate structures. When installing the elastic reservoir 17, the slide rod 20 is first inserted into the slide sleeve 18, and then the elastic reservoir 17 is fitted over the slide sleeve 18. A sealing ring is then used to fix both ends of the elastic reservoir 17 (i.e., one end is fixed to the bottom of the slide sleeve 18, and the other end is fixed to the top of the slide rod 20). Finally, the slide sleeve 18 is installed in the mounting hole 12113. In contrast, the integrated structure in the prior art (publication number CN120053809A) requires the sealing ring to be installed from one end when fixing the elastic reservoir. Therefore, the installation method in the present invention is more convenient.

[0033] Please see Figure 2 and Figure 8 In a preferred embodiment of the present invention, the base 122 is provided with a support platform 1221 inside, and a receiving space is formed between the support platform 1221 and the support plate 121. The medicine filter 21 is stuck in the receiving space to prevent the position of the medicine filter 21 from shifting.

[0034] Furthermore, in a preferred embodiment of the present invention, the support plate 1211 has a bowl-shaped structure. On the one hand, the support groove 12111 and the limiting groove 12114 can facilitate the installation of the sliding rod sleeve 18. On the other hand, the space formed between the support plate 121 and the base 122 can facilitate the installation of the liquid medicine filter 21.

[0035] Please see Figure 9 In a preferred embodiment of the present invention, the liquid filling connector 19 is provided with a duckbill valve 191 and a Luer conical connector. Further, the duckbill valve is made of 191 elastic silicone material and has a slit cut in the middle. Under normal conditions, the slit is closed. When the liquid flows in the forward direction, the slit is opened by the liquid; when the liquid flows in the reverse direction, the slit is hydraulically compressed and cannot be opened, thus forming a seal.

[0036] When aspirating liquid, one end of the aspiration needle is equipped with a Luer external conical connector and the other end is equipped with a Luer internal conical connector. A slender needle tube is provided at the front end of the Luer external conical connector. When the aspiration needle is connected to the liquid filling connector, the Luer external cylindrical connector is connected and sealed with the Luer internal conical connector on the liquid filling connector, and the needle tube opens the blade of the duckbill valve 191.

[0037] It should be further noted that, when using this invention: Dosing: Connect the syringe containing the medication to the dosing connector 19. Push the syringe; the medication in the syringe opens the incision of the duckbill valve 191 and flows sequentially through the dosing connector 19, the dosing hole 181, and the slide rod 20, finally flowing into the elastic reservoir 17, inflating the elastic reservoir 17 and storing the medication inside. Remove the syringe; the contraction force of the elastic reservoir 17 creates positive pressure on the medication, while the reverse hydraulic pressure compresses the incision of the duckbill valve 191, forming a seal, preventing the medication from flowing out of the dosing connector.

[0038] Drug extraction: When it is necessary to extract the drug solution from the infusion pump, connect the Luer outer cone connector of the syringe to the Luer inner cone part of the aspiration needle, and then connect the Luer outer cone part of the aspiration needle to the drug delivery connector 19. The aspiration needle will directly open the blade of the duckbill valve 191. After the blade is opened, the drug solution with positive pressure will automatically flow into the syringe through the aspiration needle.

[0039] Infusion: Remove the protective cap 16 and connect the infusion connector 15 to the human catheter. The medication, under positive pressure generated by the contraction of the elastic reservoir 17, flows through two branches: one branch flows through the slide bar 20, tubing, medication filter 21, microporous tube 22 / internal tee connector 25, flow regulator 12, and infusion connector 15, and is finally infused into the human body through the human catheter; simultaneously, the other branch flows through the slide bar 20, tubing, medication filter 21, internal tee connector 25, and flow restrictor 23 into the self-control component 24. Due to the flow restriction effect of the flow restrictor 23, 0.5 mL of medication will flow into the self-control component 24 over 15 minutes. When the patient needs additional medication, press the button on the self-control component 24, and 0.5 mL of medication will be added into the human body along the tubing. Then, the self-control component 24 will be refilled with 0.5 mL of medication over 15 minutes.

[0040] Adjustment: When the flow rate needs to be adjusted, the knob 123 can be turned to make the holes on the pad 124 and the base 122 rotate and slide, so that the liquid at different flow rates on the three microporous tubes 22 can be arranged and combined in different ways, thereby achieving different flow rate control. The position to be rotated to at different flow rates can be read by the scale markings on the knob 123.

[0041] In summary, this invention allows the liquid medicine to pass through the liquid medicine filter 21 before entering the microporous tube 22 and the flow restrictor tube 23, thereby avoiding the risk of pipeline blockage. In addition, by embedding the liquid medicine filter 21 inside the flow rate regulator 12 and placing the self-control component 24 near the flow rate regulator 12, the integration is improved, the pipeline is shortened, and it is easier to carry, thereby reducing the probability of collision or pulling during movement and improving infusion safety.

[0042] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A compact multi-flow rate infusion pump, comprising a protective bottle, a flow rate regulator disposed at the bottom of the protective bottle, and an external tee connector, a liquid outlet connector, and a protective cap sequentially connected to the flow rate regulator via flexible tubing, characterized in that, The top of the flow rate regulator is provided with a sliding rod sleeve that is slidably connected to the elastic reservoir. The bottom of the sliding rod sleeve is provided with a dosing hole and a liquid outlet hole. The liquid inlet connector passes through the flow rate regulator and is connected to the dosing hole. A slide rod is slidably provided in the slide rod sleeve, and one end of the elastic liquid storage bladder is fixed to the bottom of the slide rod sleeve, and the other end is fixed to the top of the slide rod; The flow rate regulator is equipped with a liquid medicine filter. The inlet of the liquid medicine filter is connected to the outlet. The outlet of the liquid medicine filter is connected to the regulating inlet of the flow rate regulator through a microporous tube, and is also connected to the external tee connector through a flow limiting tube and an automatic control component.

2. The compact multi-flow rate injection pump according to claim 1, characterized in that, The liquid filter is provided with three outlet holes, and the flow rate regulator includes three inlet holes for its adjustment inlet. One of the outlets is connected to the internal tee connector, which is then connected to the flow-limiting tube and a microporous tube. The other two outlets are connected to the two microporous tubes, and the three microporous tubes are connected to the three inlet holes.

3. The compact multi-flow-rate injection pump according to claim 1, characterized in that, The liquid filter has four outlets, one of which is connected to the flow limiting tube, and the other three outlets are connected to three microporous tubes.

4. The compact multi-flow rate injection pump according to claim 1, characterized in that, The liquid filter has an outlet that is connected to the inlet of an internal tee connector. One outlet of the internal tee connector is connected to the microporous tube, and the other outlet is connected to the flow restrictor.

5. The compact multi-flow-rate injection pump according to claim 1, characterized in that, The drug filter includes a first housing and a second housing that are snapped together, and a filter membrane embedded between the first housing and the second housing; The first housing is provided with a liquid inlet, and the second housing is provided with a liquid outlet. The liquid outlet and the liquid inlet are located at opposite ends of the liquid filter.

6. The compact multi-flow-rate injection pump according to claim 5, characterized in that, The second housing has multiple support ribs, and the top of each support rib is in contact with the filter membrane.

7. The compact multi-flow rate injection pump according to claim 1, characterized in that, The flow rate regulator includes an upper seat and a base connected together. A knob is rotatably connected to the bottom of the base, and a sealing gasket is embedded between the knob and the base. The upper seat is connected to the slide sleeve, and the liquid filter is located between the upper seat and the base.

8. The compact multi-flow-rate injection pump according to claim 7, characterized in that, The upper seat is provided with a support plate, the support plate includes a support groove and an annular wall that is connected to the groove wall of the support groove in an arc transition manner. The top edge of the annular wall is connected to the inner wall of the upper seat, and the slide rod sleeve is installed in the support groove.

9. The compact multi-flow-rate injection pump according to claim 8, characterized in that, The bottom of the support groove is provided with a mounting hole, and the side wall of the mounting hole is provided with a limiting groove; The bottom side wall of the slide sleeve is provided with a limiting rib, which is located in the limiting groove.

10. The compact multi-flow rate injection pump according to claim 8, characterized in that, The base has a support platform inside, and a receiving space is formed between the support platform and the support plate, in which the medicine filter is inserted.

Images