Micro infusion pump

Abstract

The utility model discloses a trace infusion pump which comprises a trace infusion pump assembly, a liquid storage assembly and a connecting assembly, a mounting bin is arranged on the trace infusion pump assembly, the liquid storage assembly is detachably placed in the mounting bin, the connecting assembly limits the liquid storage assembly in the mounting bin through a clamping part, the connecting assembly is communicated with the liquid storage assembly, and the connecting assembly is connected with the liquid storage assembly through a connecting part. The connecting assembly is connected with the needle seat through the infusion tube. The utility model has the beneficial effects that the structure is reasonable, the liquid storage device can be repeatedly used, the push rod is convenient to separate, and the connecting seat is convenient to install.

Description

Technical Field

[0001] This utility model relates to the field of medical equipment, specifically to a micro-infusion pump. Background Technology

[0002] The basic purpose of an insulin pump in an infusion pump is to mimic the secretory function of the pancreas, continuously injecting insulin subcutaneously into the user according to the dose required by the body, maintaining stable blood sugar throughout the day, and thus achieving the goal of controlling diabetes.

[0003] In existing technologies, insulin storage devices are typically disposable consumables. This means that once the stored insulin is used up, the reservoir, connectors, and infusion tubing all need to be replaced. For safety reasons, connectors and infusion tubing, due to prolonged contact with the external environment, need to be replaced at specified intervals. However, since the reservoir is installed inside the infusion pump, it is reusable. For users, using disposable reservoirs represents a significant expense and a waste of resources. Therefore, there is a need in the market for a reusable insulin storage device.

[0004] During the experiment, it was found that: 1. The fully threaded connector needs to be fully tightened, which means multiple turns of rotation are required to complete the fixation. This is inconvenient for older users or those whose hands cannot perform fine operations; 2. When rotating the push rod to connect with the piston after removing the reservoir, users usually connect the push rod and piston as tightly as possible due to their operating habits. This results in the piston rotating inside the cylinder and being unable to disengage from the push rod when the piston is rotated in the reverse direction to separate the liquid after the liquid is drawn out. Utility Model Content

[0005] To address the aforementioned problems, the purpose of this utility model is to provide a micro-infusion pump and its reservoir with a reasonable structure, reusable reservoir, easy push rod disengagement, and convenient connecting seat installation.

[0006] According to one aspect of this utility model, a micro-infusion pump is provided, comprising: a micro-infusion pump assembly, a liquid storage assembly, and a connecting assembly. The micro-infusion pump assembly is provided with a mounting chamber, the liquid storage assembly is detachably placed in the mounting chamber, and the connecting assembly secures the liquid storage assembly within the mounting chamber via a snap-fit ​​portion. The connecting assembly is connected to the liquid storage assembly via a connecting tube and is connected to a needle hub via an infusion tube. The detachable liquid storage assembly facilitates refilling after the medication is used up, thereby reducing operating costs. The connecting assembly facilitates quick and convenient connection.

[0007] In some embodiments, the micro-infusion pump assembly includes a housing, a control unit, a battery, and a drive unit. A mounting compartment is provided on the housing, and the drive unit is mounted at the bottom of the mounting compartment. Both the control unit and the battery are installed within the housing. The battery connects the control unit and the drive unit, and the control unit drives the drive unit to operate or stop. The mounting compartment facilitates the installation of the liquid storage assembly.

[0008] In some embodiments, the drive unit includes a micro motor, a screw, and a threaded sleeve. Both the battery and the control unit are connected to the micro motor. The output end of the micro motor is fixedly connected to the screw and drives the screw to rotate clockwise or counterclockwise. The threaded sleeve is fitted onto the screw, and the micro motor drives the threaded sleeve to move closer to or further away from the liquid storage assembly. The movement of the threaded sleeve is achieved by the micro motor driving the screw to rotate clockwise and counterclockwise, thus enabling the threaded sleeve to push the piston for micro-infusion.

[0009] In some embodiments, the snap-fit ​​portion includes: at least one single-threaded section and a threaded groove that mates with the single-threaded section. The threaded groove is located on the inner wall end of the mounting chamber, and the single-threaded section is located on the outer wall of the connecting assembly. The inclusion of at least one single-threaded section allows the user to quickly install and remove the connecting assembly by simply rotating a portion of the thread.

[0010] In some embodiments, the snap-fit ​​portion includes: at least one single-threaded section and a threaded groove that mates with the single-threaded section. The single-threaded section is located on the inner wall end of the mounting chamber, and the threaded groove is located on the outer wall of the connecting assembly. The inclusion of at least one single-threaded section allows the user to quickly install and remove the connecting assembly by simply rotating a portion of the thread.

[0011] In some embodiments, the liquid storage assembly includes a cylinder, a piston, a push rod, and a fixed sealing head. The cylinder has a receiving cavity, the fixed sealing head seals one end of the receiving cavity, and the piston seals the other end of the receiving cavity. The piston is pushed within the receiving cavity, and the push rod or threaded sleeve pushes the piston to reciprocate within the receiving cavity. The threaded sleeve pushes the piston to inject the liquid, and the push rod pulls the piston to fill the liquid. The fixed sealing head is used to confine the liquid storage assembly to the connecting assembly and fix it within the installation chamber.

[0012] In some embodiments, the piston and push rod are detachably connected by threads. The piston has internal threads at its bottom, and the push rod has an external threaded sleeve at its top. The external threaded sleeve has at least one deformation groove that penetrates through it. By providing the deformation groove, when the push rod and piston are installed, if the external threaded sleeve at the head of the push rod is subjected to force, both sides of the external threaded sleeve will deform into the deformation groove. Because the material is elastic, it is easy to recover after deformation, preventing it from falling off. The push rod can be easily separated from the piston by rotation.

[0013] In some embodiments, the connecting assembly includes: a connecting sleeve, a needle, a mounting hole, a limiting groove, and a rotating protrusion. The rotating protrusion is a sheet-like structure vertically fixed to the top of the connecting sleeve. The mounting hole passes through the rotating protrusion into the connecting sleeve. The needle is fixed to the mounting hole at the bottom of the mounting sleeve and communicates with the mounting hole. The inner wall of the connecting sleeve is provided with a limiting groove, and the outer wall of the connecting sleeve is provided with a single-threaded thread or a threaded groove.

[0014] In some embodiments, the outer wall of the fixed sealing head is provided with a limiting protrusion, which engages and is fixed with a limiting groove. This engagement of the limiting protrusion and the limiting groove facilitates defining the position of the liquid storage component.

[0015] In some embodiments, the needle pierces the fixed sealing head and communicates with the receiving cavity. Through this communication between the needle and the receiving cavity, an infusion tube is inserted at the top of the mounting hole to connect the pump body to the user's subcutaneous tissue.

[0016] This invention offers several advantages: a reasonable structure, reusable reservoir, easy detachment of the push rod, and convenient installation of the connecting seat. The detachable reservoir component facilitates refilling after use, reducing operating costs. The connecting component allows for quick and easy connection. The installation compartment facilitates installation of the reservoir component. A fixed motor drives the screw to rotate forward and backward, moving the threaded sleeve and enabling it to push the piston for micro-infusion. The single-threaded design allows for quick assembly and disassembly by rotating only a short section of the thread when installing the connecting component. The threaded sleeve pushes the piston to inject the medication. The liquid medicine is filled by pulling the piston with a push rod. The fixed sealing head is used to confine the liquid storage component to the connecting component and fix it in the installation chamber. By setting a deformation groove, when the external threaded sleeve of the push rod head is subjected to force during installation, the two sides of the external threaded sleeve will deform into the deformation groove. Due to the elasticity of the material, it is easy to recover after deformation, preventing it from falling off. The push rod and piston can be easily separated by rotation. The position of the liquid storage component is easily fixed by the locking protrusion and the locking groove. The needle communicates with the receiving cavity, and the infusion tube is inserted into the top of the installation hole to connect the pump body to the user's subcutaneous tissue. Attached Figure Description

[0017] Figure 1 This is an exploded view of a micro-infusion pump according to the present invention;

[0018] Figure 2 This is a schematic diagram of the micro-infusion pump assembly and the snap-fit ​​part of a micro-infusion pump according to the present invention;

[0019] Figure 3 This is an exploded view of the liquid storage component of a micro-infusion pump according to the present invention.

[0020] Figure 4 This is a schematic diagram of the connection assembly of a micro-infusion pump according to the present invention;

[0021] Figure 5 This is a cross-sectional view of the connecting assembly of a micro-infusion pump according to the present invention. Detailed Implementation

[0022] The present invention will now be described in detail with reference to the embodiments shown in the accompanying drawings. However, it should be noted that these embodiments are not intended to limit the present invention. Equivalent transformations or substitutions in function, method or structure made by those skilled in the art based on these embodiments are all within the protection scope of the present invention.

[0023] In the description of this utility model, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be interpreted broadly. For example, they can refer to mechanical or electrical connections, or internal connections between two components. They can be direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the terms according to the specific circumstances.

[0024] like Figure 1 As shown, the micro-infusion pump of this utility model includes: a micro-infusion pump assembly 1, a liquid storage assembly 2, and a connecting assembly 3. The micro-infusion pump assembly 1 is provided with a mounting chamber 11, and the liquid storage assembly 2 is detachably placed in the mounting chamber 11. The connecting assembly 3 secures the liquid storage assembly 2 within the mounting chamber 11 via a snap-fit ​​part 4. The connecting assembly 3 is connected to the liquid storage assembly 2 via a connecting pipe and is connected to the needle hub via an infusion tube. The detachable design of the liquid storage assembly 2 facilitates refilling after the medication is used up, thereby reducing operating costs. The connecting assembly 3 facilitates quick and convenient connection.

[0025] like Figure 2 As shown, the micro-infusion pump assembly 1 includes: a housing 12, a control unit 13, a battery 14, and a drive unit 15. An installation chamber 11 is provided on the housing 12, and the drive unit 15 is installed at the bottom of the installation chamber 11. Both the control unit 13 and the battery 14 are installed inside the housing 12. The battery 14 connects the control unit 13 and the drive unit 15, and the control unit 13 drives the drive unit 15 to operate or stop. The installation chamber 11 facilitates the installation of the liquid storage assembly 2.

[0026] The drive unit 15 includes a micro motor 151, a screw 152, and a threaded sleeve 153. The battery 14 and the control unit 13 are both connected to the micro motor 151. The output end of the micro motor 151 is fixedly connected to the screw 152 and drives the screw 152 to rotate clockwise or counterclockwise. The threaded sleeve 153 is fitted onto the screw 152. The micro motor 151 drives the threaded sleeve 153 to move closer to or further away from the liquid storage assembly 2. By driving the screw 152 to rotate clockwise and counterclockwise, the micro motor drives the screw 152 to move the threaded sleeve 153, thereby enabling the threaded sleeve 153 to push the piston 22 for micro-infusion.

[0027] like Figure 3 As shown, the snap-fit ​​part 4 includes: at least one single-threaded thread 41 and a threaded groove 42 that mates with the single-threaded thread 41. The threaded groove 42 is located at the inner end of the mounting chamber 11, and the single-threaded thread 41 is located on the outer wall of the connecting assembly 3. The provision of at least one single-threaded thread 41 allows the user to quickly install and remove the connecting assembly 3 by simply rotating a portion of the thread.

[0028] The snap-fit ​​part 4 includes at least one single-threaded thread 41 and a threaded groove 42 that mates with the single-threaded thread 41. The single-threaded thread 41 is located on the inner wall end of the mounting chamber 11, and the threaded groove 42 is located on the outer wall of the connecting assembly 3. The provision of at least one single-threaded thread 41 allows the user to quickly install and remove the connecting assembly 3 by simply rotating a section of the thread.

[0029] Of course, the single-threaded thread 41 can also be set in two or three segments. The single-threaded thread 41 can be set on the outer wall of the connecting sleeve 31 or on the inner wall of the mounting chamber 11. When the single-threaded thread 41 is set in two segments, the two segments of the single-threaded thread 41 should be set symmetrically; when the single-threaded thread 41 is set in three segments, the three segments of the single-threaded thread 41 should be arranged in a circular array with the axis of the mounting chamber 11 or the axis of the connecting sleeve 31 as the center. It should be noted that when setting multiple segments of single-threaded thread 41, the distance between two adjacent single-threaded threads 41 should be greater than the length of the single-threaded thread 41.

[0030] like Figure 4 As shown, the liquid storage assembly 2 includes a cylinder 21, a piston 22, a push rod 23, and a fixed sealing head 24. The cylinder 21 has a receiving cavity 25. The fixed sealing head 24 seals one end of the receiving cavity 25, and the piston 22 seals the other end of the receiving cavity 25. The piston 22 is pushed within the receiving cavity 25, and the push rod 23 or the threaded sleeve 153 pushes the piston 22 to reciprocate within the receiving cavity 25. The threaded sleeve 153 pushes the piston 22 to inject the liquid, and the push rod 23 pulls the piston 22 to fill the liquid. The fixed sealing head 24 is used to confine the liquid storage assembly 2 to the connecting assembly 3 and fix it within the installation chamber 11.

[0031] The piston 22 and push rod 23 are detachably connected by threads. The piston 22 has internal threads at its bottom, and the push rod 23 has an external threaded sleeve 27 at its top. The external threaded sleeve 27 has at least one deformation groove 28 that penetrates through it. By providing the deformation groove 28, when the push rod 23 and piston 22 are installed, if the external threaded sleeve 27 at the head of the push rod 23 is subjected to force, both sides of the external threaded sleeve 27 will deform into the deformation groove 28. Due to the elasticity of the material, it easily recovers after deformation, preventing it from falling off. The push rod 23 can be easily separated from the piston 22 by rotation. During implementation, the deformation groove 28 needs to penetrate the entire lower part of the external thread, and the magnitude of the deformation is related to the width and number of deformation grooves 28. In certain application scenarios, the force connecting piston 22 and push rod 23 is greater than the frictional force between piston 22 and accommodating cavity 25, making it difficult to separate push rod 23 from piston 22. When push rod 23 is rotated in the opposite direction, it will only cause piston 22 to rotate together. Thus, when the deformation groove is continuously rotated, the deformation groove 28 deforms, causing the external thread to separate from the internal thread, thereby making the force connecting push rod 23 and piston 22 less than the frictional force between piston 22 and accommodating cavity 25.

[0032] like Figure 4 and Figure 5 As shown, the connecting component 3 includes: a connecting sleeve 31, a needle 32, a mounting hole 33, a limiting groove 34, and a rotating protrusion 35. The rotating protrusion 35 is a plate-shaped part vertically fixed to the top of the connecting sleeve 31. The mounting hole 33 passes through the rotating protrusion 35 into the connecting sleeve 31. The needle 32 is fixed from the bottom of the mounting sleeve into the mounting hole 33 and communicates with the mounting hole 33. The limiting groove 34 is provided on the inner wall of the connecting sleeve 31, and the single-threaded thread 41 or threaded groove 42 is provided on the outer wall of the connecting sleeve 31. The connecting component 3 essentially serves two functions: 1. limiting the liquid storage component 2, and 2. connecting the infusion pipeline.

[0033] The outer wall of the fixed sealing head 24 is provided with a limiting protrusion 26, which is engaged and fixed with the limiting groove 34. The engagement and fixing of the limiting protrusion 26 and the limiting groove 34 facilitates the limitation of the position of the liquid storage component 2.

[0034] The needle 32 pierces the fixed sealing head 24 and communicates with the receiving cavity 25. Through the communication between the needle 32 and the receiving cavity 25, an infusion tube is inserted into the top of the mounting hole 33 to connect the pump body to the user's subcutaneous tissue.

[0035] The procedure for replacing liquid storage component 2 should be performed as follows:

[0036] S1. Rotate the rotating protrusion 35 to separate the connecting sleeve 31 from the mounting chamber 11;

[0037] S2, At the same time, the connecting sleeve 31 pulls out the liquid storage component 2;

[0038] S3. Then, thread the push rod 23 to the piston 22 and connect it to the mounting hole 33 through the connecting pipe.

[0039] S4. Pull the push rod 23 to inject new medicine into the receiving cavity 25;

[0040] S5. Separate push rod 23 from piston 22;

[0041] S6. Push the connecting sleeve 31 and the liquid storage component 2 into the installation chamber 11;

[0042] S7. Rotate the rotating protrusion 35 to fix the connecting sleeve 31 to the mounting chamber 11.

[0043] If either the liquid storage component 2 or the connecting component 3 reaches the end of its service life and needs to be replaced simultaneously or selectively, after completing step S2, hold the cylinder body and rotate the rotating protrusion 35 to separate the limiting protrusion 26 from the limiting groove 34 for replacement.

[0044] The above descriptions are merely some embodiments of this utility model. It should be noted that those skilled in the art can make other modifications and improvements without departing from the inventive concept of this utility model, and these all fall within the protection scope of this utility model.

Claims

1. A micro-infusion pump, characterized in that, include: The micro-infusion pump assembly, the reservoir assembly, and the connecting assembly are provided. The micro-infusion pump assembly is provided with an installation chamber. The reservoir assembly is detachably placed in the installation chamber. The connecting assembly limits the reservoir assembly to the installation chamber through a snap-fit ​​part. The connecting assembly is connected to the reservoir assembly through a communication pipe. The connecting assembly is connected to the needle hub through an infusion pipe. The snap-fit ​​portion includes: at least one section of single-threaded thread and a threaded groove that mates with the single-threaded thread, wherein the threaded groove is disposed at the inner end of the mounting chamber and the single-threaded thread is disposed on the outer wall of the connecting component; Alternatively, the snap-fit ​​portion includes: at least one single-threaded section and a threaded groove that mates with the single-threaded section, wherein the single-threaded section is disposed on the inner wall end of the mounting chamber and the threaded groove is disposed on the outer wall of the connecting assembly.

2. A micro-infusion pump according to claim 1, characterized in that, The micro-infusion pump assembly includes: a housing, a control unit, a battery, and a drive unit. The housing has an installation compartment, and the drive unit is installed at the bottom of the installation compartment. The control unit and the battery are both installed inside the housing. The battery connects the control unit and the drive unit, and the control unit drives the drive unit to run or stop.

3. A micro-infusion pump according to claim 2, characterized in that, The drive unit includes a micro motor, a screw, and a threaded sleeve. The battery and the control unit are both connected to the micro motor. The output end of the micro motor is fixedly connected to the screw and drives the screw to rotate clockwise or counterclockwise. The threaded sleeve is fitted onto the screw, and the micro motor drives the threaded sleeve to move closer to or away from the liquid storage component.

4. A micro-infusion pump according to claim 3, characterized in that, The liquid storage assembly includes: a cylinder, a piston, a push rod, and a fixed sealing head. The cylinder has a receiving cavity. The fixed sealing head seals one end of the receiving cavity, and the piston seals the other end of the receiving cavity. The piston is pushed within the receiving cavity, and the push rod or threaded sleeve pushes the piston to reciprocate within the receiving cavity.

5. A micro-infusion pump according to claim 4, characterized in that, The piston and push rod are detachably connected by threads. The bottom of the piston has internal threads, and the top of the push rod is provided with an external threaded sleeve. The external threaded sleeve has at least one deformation groove that penetrates the external threaded sleeve.

6. A micro-infusion pump according to claim 5, characterized in that, The connecting assembly includes: a connecting sleeve, a needle, a mounting hole, a limiting groove, and a rotating protrusion. The rotating protrusion is a sheet-like structure vertically fixed to the top of the connecting sleeve. The mounting hole passes through the rotating protrusion into the connecting sleeve. The needle is fixed to the mounting hole at the bottom of the mounting sleeve and communicates with the mounting hole. The inner wall of the connecting sleeve is provided with a limiting groove, and the outer wall of the connecting sleeve is provided with a single-line thread or a threaded groove.

7. A micro-infusion pump according to claim 6, characterized in that, The outer wall of the fixed sealing head is provided with a limiting protrusion, which is engaged and fixed with the limiting groove.

8. A micro-infusion pump according to claim 7, characterized in that, The needle pierces the fixed sealing head and connects with the receiving cavity.

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