Infusion micro pump

Abstract

The application discloses a kind of infusion micro pump, including infusion micro pump body, needle cylinder frame, push injection device, needle cylinder fixed pole and injection cylinder, the inner wall of infusion transfer cylinder is rotatably connected with annular conversion plate, the center of the annular conversion plate is equipped with positioning round plate, one end of the infusion transfer cylinder is equipped with infusion tube connector for with infusion extension tube, the outside of the positioning round plate is connected with temporary infusion tube corresponding with the infusion tube connector, the upper of the injection cylinder is equipped with liquid storage cylinder for temporarily storing liquid, the outer wall of the annular conversion plate is equipped with two symmetrical connecting holes;By center control rod, temporary infusion tube and liquid storage cylinder can be controlled to communicate, at this time, liquid can be added under the connection of communication pipe and medicine adding pipe communicated with medicine adding hole, so that the speed of infusion is not affected by the pressure of added liquid, and the patient is protected.

Description

Technical Field

[0001] This invention relates to the field of infusion pump technology, and in particular to a micro-infusion pump. Background Technology

[0002] An infusion pump is a medical device that can precisely control the rate and dosage of intravenous infusion. It typically consists of a pump body, a control system, a display screen, and infusion tubing. In clinical applications, infusion pumps are often used in situations where strict control of the infusion rate is required, such as when certain drugs need to be administered slowly and at a constant rate to ensure efficacy and reduce adverse reactions. They are widely used in intensive care, cardiovascular disease treatment, and neonatal care.

[0003] Because infusion pumps deliver medication precisely, evenly, and continuously to the patient at a set speed and dosage by pushing the syringe piston, the syringe can only hold a limited amount of medication. After the infusion is finished, the syringe needs to be replaced and the medication replenished. For patients with critical conditions or those requiring strict control of infusion speed and dosage, interruptions in the infusion process during medication changes can affect treatment efficacy and even alter the patient's condition. Therefore, replacing the medication by changing the syringe is not conducive to the continuous infusion of the pump. Furthermore, directly delivering new medication into the syringe, where the syringe is connected to the infusion tubing, causes the medication to flow into the patient's body under pressure at a faster rate, impacting the patient's safety during infusion.

[0004] Therefore, we propose an infusion micro-pump. Summary of the Invention

[0005] The main objective of this invention is to provide a micro-infusion pump.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] An infusion micropump includes an infusion micropump body, a syringe holder, an injection device, a syringe fixing rod, and an injection cylinder. An infusion transfer cylinder connected to the dispensing end of the injection cylinder is engaged with the inner wall of the syringe holder. The injection cylinder is connected to the infusion transfer cylinder via a syringe connector. An annular conversion plate is rotatably connected to the inner wall of the infusion transfer cylinder. A positioning circular plate is located at the center of the annular conversion plate. The positioning circular plate is connected to the center of one end of the infusion transfer cylinder via a central adjustment rod. The central adjustment rod is rotatably connected to the center of one end of the infusion transfer cylinder. One end of the infusion transfer cylinder is provided with... An infusion tube connector for use with an infusion extension tube; a temporary infusion tube corresponding to the infusion tube connector is connected to the outer side of the positioning circular plate; a reservoir for temporary storage of the drug solution is provided above the syringe; the reservoir and the infusion transfer cylinder are connected by a connecting tube; two symmetrical connecting holes are opened on the outer wall of the annular conversion plate; the temporary infusion tube is connected to the other connecting hole by a connecting tube; a drug addition hole is opened at the bottom of the infusion transfer cylinder, which is connected to one of the connecting holes; and the drug addition hole is connected to the drug addition line by the connecting tube.

[0008] A further improvement of the present invention is that a support plate for supporting the liquid storage cylinder is installed at the top of the syringe holder, the connecting tube passes through the support plate, the connecting tube corresponds to the connecting hole located at the top of the outer wall of the annular conversion plate, and the top of the connecting cylinder is in contact with the inner wall of the annular conversion plate.

[0009] A further improvement of the present invention is that the syringe connector is located at the center of one side of the infusion transfer cylinder, the syringe connector corresponds to the infusion end of the syringe, the syringe connector is engaged with the infusion end of the syringe, and a sealing rubber gasket is provided at the connection between the inner wall of the infusion transfer cylinder and one end of the temporary infusion tube.

[0010] A further improvement of the present invention is that the center control rod, the positioning circular plate, and the center of the infusion transfer cylinder correspond to each other, the positioning circular plate is connected to the inner wall of the annular conversion plate by a number of positioning rods, and the temporary infusion tube is fixed to the outer wall of the positioning circular plate by positioning rods.

[0011] A further improvement of the present invention is that a rubber sealing ring is provided at the center of the infusion transfer cylinder for fitting against the outer wall of the central control rod, a sealing ring block is fixedly connected at the connection between the annular conversion plate and the infusion transfer cylinder, a sealing ring groove is provided on the inner wall of the infusion transfer cylinder for limiting the sealing ring block, and an exhaust pipe is provided on the outer wall of the infusion transfer cylinder for venting air from the infusion transfer cylinder.

[0012] A further improvement of the present invention is that an infusion micropump comprises:

[0013] S1. The infusion micro-pump body drives the injection device to adjust its position through the installed mechanical or electronic drive device. At this time, the injection device can push the piston of the syringe to move, and inject the medicine in the syringe into the patient's body accurately, evenly and continuously according to the set speed and dosage. The infusion tube and the syringe are connected through the infusion tube connector and syringe connector at both ends of the infusion transfer tube to ensure normal infusion operation.

[0014] S2. After a certain period of infusion, the amount of medication that can be stored in the syringe is limited. At this time, it is necessary to replenish the medication in the syringe to ensure the infusion work for the patient. This can be achieved by rotating the central control rod, which drives the positioning plate to rotate. The positioning plate is connected to the annular conversion plate and the temporary infusion tube through the positioning rod, so that the position of the temporary infusion tube can be adjusted by rotating the annular conversion plate. This allows the syringe connector to connect and connect with the infusion tube connector. The temporary infusion tube is connected to the connecting tube and the reservoir through the connecting tube and the reservoir. The temporary medication in the reservoir can be transferred to the infusion tube through the connection between the temporary infusion tube and the infusion tube connector to carry out continuous infusion work.

[0015] S3. When temporarily infusing fluid into the infusion tube connector and infusion tube through the connecting tube, reservoir, connecting tube, and temporary infusion tube, the infusion transfer tube can be connected to the connecting tube at the bottom through the drug addition hole. After connecting to the connecting tube through the drug addition tube, it can be connected to the inner cavity of the infusion transfer tube through the drug addition hole and the connecting hole below to fill the fluid. The fluid injected into the infusion transfer tube can be pushed back into the syringe. At this time, the temporary infusion tube seals the infusion tube connector to prevent the pressure during drug addition from causing the fluid to flow too quickly into the patient's body, which would be detrimental to the patient. After the fluid addition is completed, the annular conversion plate can be rotated to misalign the connecting hole and the connecting tube. The piston rod on the syringe is then pushed again by the push device installed on the infusion micro-pump body to perform micro-infusion.

[0016] Compared with existing technologies, connecting an additional storage tank to the infusion transfer tube can effectively solve problems such as ensuring continuous infusion when adding medication during the infusion process.

[0017] Compared with existing technologies, the central control lever can control the connection between the temporary infusion tubing and the reservoir. At this time, medication can be added through the connection between the connecting tube and the medication addition tube connected to the medication addition port. This ensures that the addition of medication does not affect the continuous infusion and that the infusion rate is not affected by the pressure caused by the addition of medication, thus protecting the patient. Attached Figure Description

[0018] Figure 1 This invention relates to a three-dimensional structure of a micro-infusion pump.

[0019] Figure 2 This is a three-dimensional cross-sectional view of the infusion transfer cylinder and connecting pipe in an infusion micro-pump according to the present invention.

[0020] Figure 3 This is a schematic cross-sectional view of the infusion transfer cylinder in a micro-infusion pump according to the present invention.

[0021] Figure 4 This invention relates to a micro-infusion pump. Figure 2 An enlarged diagram of A in the diagram.

[0022] In the diagram: 1. Infusion micro-pump body; 11. Syringe holder; 12. Injection device; 13. Syringe fixing rod; 14. Support plate; 2. Injection cylinder; 21. Infusion transfer cylinder; 211. Sealing ring groove; 22. Syringe connector; 221. Infusion tubing connector; 23. Annular conversion plate; 231. Connecting hole; 232. Sealing ring block; 24. Drug injection hole; 25. Connecting cylinder; 26. Temporary infusion tubing; 27. Exhaust pipe; 3. Central control rod; 31. Positioning disc; 32. Positioning rod; 33. Rubber sealing ring; 4. Connecting pipe; 41. Storage cylinder. Detailed Implementation

[0023] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the present invention. In order to better illustrate the specific embodiments of the present invention, some parts in the drawings may be omitted, enlarged or reduced, and do not represent the actual product size. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. Based on the specific embodiments of the present invention, all other specific embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Example. Please refer to the following: Figures 1-4An infusion micro-pump includes an infusion micro-pump body 1, a syringe holder 11, an injection device 12, a syringe fixing rod 13, and an injection cylinder 2. An infusion transfer cylinder 21, connected to the outlet end of the injection cylinder 2, is engaged with the inner wall of the syringe holder 11. The injection cylinder 2 is connected to the infusion transfer cylinder 21 via a syringe connector 22. An annular conversion plate 23 is rotatably connected to the inner wall of the infusion transfer cylinder 21. A positioning circular plate 31 is located at the center of the annular conversion plate 23. The positioning circular plate 31 is connected to the center of one end of the infusion transfer cylinder 21 via a central adjustment rod 3. The central adjustment rod 3 is rotatably connected to the center of one end of the infusion transfer cylinder 21. One end of the infusion transfer cylinder 21 is equipped with a... At the infusion tube connector 221 of the infusion extension tube, a temporary infusion tube 26 corresponding to the infusion tube connector 221 is connected to the outside of the positioning circular plate 31. A storage cylinder 41 for temporary storage of the drug solution is provided above the syringe 2. The storage cylinder 41 is connected to the infusion transfer cylinder 21 through a connecting pipe 4. Two symmetrical connecting holes 231 are opened on the outer wall of the annular conversion plate 23. The temporary infusion tube 26 is connected to the other connecting hole 231 through a connecting cylinder 25. A drug addition hole 24 is opened at the bottom of the infusion transfer cylinder 21, which is connected to one of the connecting holes 231. At the same time, the drug addition hole 24 is connected to the drug addition pipeline through a connecting pipe 4.

[0025] In this embodiment, after the syringe 2 is engaged with the syringe holder 11, it is fixed by the syringe fixing rod 13. At this time, the piston rod sliding inside the syringe 2 can be supported by the injection device 12, so that the infusion micro-pump body 1 can drive the injection device 12 to adjust its position through the installed mechanical or electronic drive device. The injection device 12 can push the piston of the syringe to move, and inject the drug solution in the syringe 2 into the patient's body accurately, evenly and continuously according to the set speed and dosage. The syringe 2 is connected to the infusion tubing for infusion to the patient through the infusion transfer tube 21. At this time, the center of the infusion transfer tube 21 corresponds to the injection end of the syringe 2, so that the syringe connector 22 installed at the center of one end of the infusion transfer tube 21 is aligned with the syringe 2. The syringe 2 is connected to the infusion tube, and the infusion tubing is connected to the infusion tube connector 221 installed at the other end of the infusion transfer cylinder 21. This allows the medication in the syringe 2 to pass through the infusion transfer cylinder 21 before being injected into the patient through the infusion tube, enabling the device to perform infusion normally. When the medication in the syringe 2 is depleted, it is necessary to disconnect the syringe 2 from the infusion transfer cylinder 21 to replenish the medication before reconnecting it to the syringe holder 11 and connecting it to the syringe connector 221 for infusion. The infusion process requires interrupting the infusion during the medication replenishment process, which is particularly problematic for patients with critical conditions. For patients requiring urgent or strictly controlled drug infusion rates and dosages, interruptions in drug infusion during dressing changes may affect treatment efficacy and even alter the patient's condition. In such cases, the infusion transfer tube 21 can be rotated through the inner wall to connect to the annular conversion plate 23. When medication needs to be added, a central control rod 3, fixedly connected to one side of the positioning circular plate 31 at the center of the annular conversion plate 23, is rotatably connected to the center of one end of the infusion transfer tube 21. One end of the central control rod 3 passes through one end of the infusion transfer tube 21, allowing staff to rotate the central control rod 3 to rotate the positioning circular plate 31 even when the medication in the syringe 2 is not completely infused. The positioning circular plate 31 then rotates the temporary infusion tube 26 within the infusion transfer tube 21, allowing the temporary infusion tube 26 to rotate within the infusion transfer tube 21. The infusion tube 26 can be rotated to the position corresponding to the infusion tube connector 221. The temporary infusion tube 26 contains the original medication in the infusion transfer cylinder 21. At this time, the temporary infusion tube 26 is connected to one of the upper connecting holes 231 on the outer wall of the annular conversion plate 23 through the connecting tube 25. This allows the temporary medication stored in the storage cylinder 41 to be connected to the cavity of the temporary infusion tube 26 through the connecting tube 4. When medication needs to be added to the syringe 2, the device can connect the temporary infusion tube 26 to the infusion tube connector 221, forming a closed infusion circuit. At this time, the connecting hole 231 below the annular conversion plate 23 corresponds to the medication addition hole 24 on the outer wall of the infusion transfer cylinder 21.The reservoir 41, fixedly connected to the bottom of the outer wall of the infusion transfer cylinder 21, can communicate with the drug delivery line. This allows the drug delivery line to inject the required medication into the infusion transfer cylinder 21 through the reservoir 41. The medication injected into the infusion transfer cylinder 21 then communicates with the syringe 2 through the syringe connector 22, allowing the medication to be pushed back into the syringe 2. At this time, the temporary infusion tube 26 seals the infusion tube connector 221 to prevent the pressure during medication delivery from causing the medication to flow too quickly into the patient, which could be harmful. This ensures continuous infusion while preventing the medication from flowing too quickly into the patient's body due to pressure, thus protecting the patient. After medication delivery, the annular conversion plate 23 can be rotated to misalign the connection hole 231 with the connecting tube 4. The injection device 12 installed on the infusion micro-pump body 1 then pushes the piston rod on the syringe 2 to perform micro-infusion.

[0026] The syringe holder 11 has a support plate 14 at its top for supporting the reservoir 41. A connecting pipe 4 passes through the support plate 14 and corresponds to the connecting hole 231 located at the top of the outer wall of the annular conversion plate 23. The top of the connecting cylinder 25 is in contact with the inner wall of the annular conversion plate 23. The support plate 14 at the top of the syringe holder 11 is used to support and fix the reservoir 41, ensuring that the reservoir 41 is fixed above the infusion transfer cylinder 21, so that the liquid medicine in the reservoir 41 can flow through the connecting pipe 4 into the temporary infusion tube 26, allowing the temporary infusion tube 26 to flow through the connecting pipe 4. After the infusion tube 26 is connected to the infusion tube connector 221, it can provide temporary infusion for the patient. The connecting tube 4 corresponds to the connecting hole 231 at the top, ensuring that the connecting tube 4 is connected to the inner cavity of the infusion transfer cylinder 21 and can enter the temporary infusion tube 26 through the connecting hole 231. The top of the connecting cylinder 25 is in contact with the inner wall of the annular conversion plate 23, so that the connecting hole 231 and the temporary infusion tube 26 can be connected through the connecting cylinder 25, so that the temporary medicine in the reservoir 41 can be infused through the temporary infusion tube 26 and the infusion tube connector 221.

[0027] The syringe connector 22 is located at the center of one side of the infusion transfer cylinder 21, and corresponds to the infusion end of the syringe 2. The syringe connector 22 is engaged with the infusion end of the syringe 2. A sealing rubber gasket is provided at the connection between the inner wall of the infusion transfer cylinder 21 and one end of the temporary infusion tube 26. The syringe connector 22 is located at the center of one side of the infusion transfer cylinder 21, so that it can be connected to the injection end of the syringe 2. The sealing rubber gasket at the connection between the inner wall of the infusion transfer cylinder 21 and the temporary infusion tube 26 can ensure that when the temporary infusion tube 26 is rotated by the central control rod 3, driving the positioning plate 31, the positioning rod 32 and the temporary infusion tube 26 to rotate, the sealing rubber gasket ensures that one end of the temporary infusion tube 26 is sealed with the inner wall of the infusion transfer cylinder 21, so that the temporary infusion tube 26 can be sealed and connected with the infusion tube connector 221.

[0028] The central control rod 3, the positioning circular plate 31, and the infusion transfer cylinder 21 are aligned at their centers. The positioning circular plate 31 is connected to the inner wall of the annular conversion plate 23 by several positioning rods 32. At the same time, the temporary infusion tube 26 is fixed to the outer wall of the positioning circular plate 31 by the positioning rods 32. The central control rod 3, the positioning circular plate 31, and the infusion transfer cylinder 21 are aligned at their centers, so that the central control rod 3, which is rotatably connected at the center of the infusion transfer cylinder 21, can drive the positioning circular plate 31 to rotate. This allows the positioning circular plate 31 to be connected to the annular conversion plate 23 by the positioning rods 32, and thus drive the annular conversion plate 23 to rotate synchronously. At the same time, the annular conversion plate 23 is connected and fixed to the outer wall of the temporary infusion tube 26 by the positioning rods 32, so that the temporary infusion tube 26 can revolve around the center of the infusion transfer cylinder 21 as its axis. This allows the temporary infusion tube 26 to rotate to correspond with or be misaligned with the infusion tube connector 221.

[0029] The infusion transfer cylinder 21 has a rubber sealing ring 33 at its center for fitting against the outer wall of the central control rod 3. A sealing ring block 232 is fixedly connected to the connection between the annular conversion plate 23 and the infusion transfer cylinder 21. A sealing ring groove 211 is provided on the inner wall of the infusion transfer cylinder 21 to limit the sealing ring block 232. An exhaust pipe 27 is provided on the outer wall of the infusion transfer cylinder 21 to vent air from inside the cylinder. The rubber sealing ring 33 at the center of the infusion transfer cylinder 21 ensures that when the central control rod 3 rotates to the center of one end of the infusion transfer cylinder 21, the connection between the central control rod 3 and the infusion transfer cylinder 21 is secure. To prevent leakage of the medication, the connection between the annular conversion plate 23 and the inner wall of the infusion transfer cylinder 21 is limited by the sealing ring groove 211 and the sealing ring block 232. This allows the outer wall of the annular conversion plate 23 to fit against the inner wall of the infusion transfer cylinder 21 while rotating. At the same time, this limit the position of the annular conversion plate 23 and ensures a sealed connection between the annular conversion plate 23 and the infusion transfer cylinder 21, preventing leakage of the medication. After the medication is added, the vent pipe 27 can be opened by pushing the piston to compress the medication. At this time, a small amount of medication can be discharged by opening one end of the vent pipe 27. When the medication is discharged, it ensures that the air inside the infusion transfer cylinder 21 is discharged.

[0030] 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 illustrative of the 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 present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. An infusion micropump, comprising an infusion micropump body (1), a syringe holder (11), an injection device (12), a syringe fixing rod (13), and an injection cylinder (2), characterized in that: The syringe holder (11) is fitted with an infusion transfer cylinder (21) connected to the liquid outlet of the syringe (2). The syringe (2) is connected to the infusion transfer cylinder (21) via a syringe connector (22). An annular conversion plate (23) is rotatably connected to the inner wall of the infusion transfer cylinder (21). A positioning circular plate (31) is provided at the center of the annular conversion plate (23). The positioning circular plate (31) is connected to the center of one end of the infusion transfer cylinder (21) via a central control rod (3). The central control rod (3) is rotatably connected to the center of one end of the infusion transfer cylinder (21). One end of the infusion transfer cylinder (21) is provided with an infusion tube connector (221) for connecting to an infusion extension tube. The positioning circular plate (31) is connected to the center of one end of the infusion transfer cylinder (21) via a central control rod (3). 31) A temporary infusion tube (26) corresponding to the infusion tube connector (221) is connected to the outside. A storage cylinder (41) for temporarily storing the medicine is provided above the syringe (2). The storage cylinder (41) is connected to the infusion transfer cylinder (21) through a connecting pipe (4). Two symmetrical connecting holes (231) are opened on the outer wall of the annular conversion plate (23). The temporary infusion tube (26) is connected to the other connecting hole (231) through a connecting cylinder (25). A drug addition hole (24) is opened at the bottom of the infusion transfer cylinder (21) and is connected to one of the connecting holes (231). At the same time, the drug addition hole (24) is connected to the drug addition pipeline through the connecting pipe (4).

2. The infusion micropump according to claim 1, characterized in that: The syringe holder (11) is equipped with a support plate (14) for supporting the liquid storage cylinder (41) at the top. The connecting pipe (4) passes through the support plate (14). The connecting pipe (4) corresponds to the connecting hole (231) located at the top of the outer wall of the annular conversion plate (23). The top of the connecting cylinder (25) is in contact with the inner wall of the annular conversion plate (23).

3. The infusion micro-pump according to claim 1, characterized in that: The syringe connector (22) is located at the center of one side of the infusion transfer cylinder (21). The syringe connector (22) corresponds to the infusion end of the syringe (2). The syringe connector (22) is engaged with the infusion end of the syringe (2). A sealing rubber gasket is provided at the connection between the inner wall of the infusion transfer cylinder (21) and one end of the temporary infusion tube (26).

4. The infusion micro-pump according to claim 1, characterized in that: The center control rod (3), the positioning circular plate (31) and the infusion transfer cylinder (21) correspond to each other at their centers. The positioning circular plate (31) is connected to the inner wall of the annular conversion plate (23) by a number of positioning rods (32). At the same time, the temporary infusion tube (26) is fixed to the outer wall of the positioning circular plate (31) by positioning rods (32).

5. The infusion micro-pump according to claim 1, characterized in that: The infusion transfer cylinder (21) is provided with a rubber sealing ring (33) at the center for fitting against the outer wall of the central control rod (3). A sealing ring block (232) is fixedly connected at the connection between the annular conversion plate (23) and the infusion transfer cylinder (21). A sealing ring groove (211) is provided on the inner wall of the infusion transfer cylinder (21) for limiting the sealing ring block (232). An exhaust pipe (27) is provided on the outer wall of the infusion transfer cylinder (21) for venting the air inside the infusion transfer cylinder (21).

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