Medicine storage device and insulin pump

Abstract

The invention discloses a medicine storage device, and relates to the technical field of medicine storage and conveying, the medicine storage device comprises a bottom plate, a fixing ring and a liquid storage film cover, the liquid storage film cover is made of an elastic material easy to deform, the fixing ring is fixedly arranged above the bottom plate and is in sealing connection with the bottom plate, and the bottom edge of the liquid storage film cover can be attached to the inner wall of the fixing ring; a liquid storage cavity is formed in the space between the liquid storage film cover and the bottom plate, a liquid through hole is formed in the fixing ring, and liquid medicine or gas can enter or be discharged out of the liquid storage cavity through the liquid through hole. The invention further discloses an insulin pump which comprises a fixing base, an injection device and the medicine storage device, the medicine storage device is fixedly arranged on the fixing base, the injection device is connected and communicated with the liquid passing hole of the medicine storage device, the fixing base is used for being attached to the body of a patient, and the injection device is used for injecting medicine. According to the invention, the waste of liquid medicine residues can be reduced, and the applicability is high.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medicine storage and delivery, in particular to a medicine storage device and an insulin pump. BACKGROUND

[0002] An insulin pump is a medical device used for blood glucose management in diabetes patients, which simulates the physiological insulin secretion of human pancreas by continuously delivering insulin subcutaneously. Compared with the traditional insulin injection method, the insulin pump provides more flexible and accurate insulin delivery, which helps to improve blood glucose control and improve the quality of life of patients. The traditional insulin pump usually consists of a portable pump body, a liquid storage device for storing insulin, an infusion catheter and a subcutaneous needle. The liquid storage device is a device made of hard materials such as plastic. For the liquid storage device made of hard materials, firstly, the hard material cannot be deformed, and after use, there will be some residual liquid in the inner wall or corner of the liquid storage device, which will cause a great waste of liquid. Secondly, the amount of insulin required by patients of different degrees may differ slightly every day, and the liquid storage device made of hard materials can only store a fixed amount of insulin, which cannot adapt to the use of various groups of people, and the applicability is poor. Therefore, there is an urgent need for a medicine storage device and an insulin pump to solve the above technical problems. SUMMARY

[0003] The purpose of the present application is to provide a medicine storage device and an insulin pump to solve the above-mentioned problems of the prior art, so as to reduce the waste of liquid and improve the applicability.

[0004] To achieve the above-mentioned purpose, the present application provides the following solutions:

[0005] The present application provides a medicine storage device, which comprises a bottom plate, a fixing ring and a liquid storage film cover. The liquid storage film cover is made of elastic material. The fixing ring is fixedly arranged above the bottom plate and forms a sealed connection with the bottom plate. The bottom edge of the liquid storage film cover can be arranged in contact with the inner wall of the fixing ring in a circumferential direction and forms a sealed connection. The space between the liquid storage film cover and the bottom plate forms a liquid storage cavity. The fixing ring is provided with a liquid passage hole, and liquid or gas can enter or exit the liquid storage cavity through the liquid passage hole.

[0006] In some embodiments, a transparent window is further included. The bottom plate is provided with a containing hole, and the transparent window covers the containing hole and forms a sealed connection with the containing hole.

[0007] In some embodiments, the inner wall of the fixing ring is a circular arc inclined surface, and the height gradually decreases towards the center of the bottom plate.

[0008] In some embodiments, the accommodating hole is triangular in shape, the edges of the accommodating hole are circularly arcuate, and the tip vertex is arranged at the middle of the bottom plate, and the bottom edge is arranged close to the liquid passage hole.

[0009] In some embodiments, the sealing connection between the fixing ring and the bottom plate and the sealing connection between the liquid storage film cover and the fixing ring can be achieved by laser welding, ultrasonic welding, hot plate welding, vibration welding, hot air welding or glue bonding.

[0010] In some embodiments, the liquid storage film cover is a thermoplastic elastomer.

[0011] In some embodiments, the bottom plate and the fixing ring are made of the same material, which is polycarbonate or acrylonitrile-butadiene-styrene copolymer.

[0012] The present application also provides an insulin pump, which comprises an injection device and a medicine storage device as described above, the injection device is connected to and communicates with the liquid passage hole of the medicine storage device, and the injection device is used for injecting medicine.

[0013] In some embodiments, the injection device further comprises a fixed seat, the medicine storage device is fixedly arranged on the fixed seat, the fixed seat is used for being attached to the patient, the injection device comprises an injection head, a first pipeline, a second pipeline, a third pipeline, a fourth pipeline, a first pressing device and a second pressing device, the first pressing device and the second pressing device are oppositely arranged, the first pressing device comprises a first key and a first cylinder, the first key is slidingly arranged in the first cylinder, the first cylinder is fixedly arranged on the fixed seat, the second pressing device comprises a second key, a second cylinder, a first partition block and a second partition block, the second key is fixedly connected with the first partition block and the second partition block, the first partition block and the second partition block are slidingly arranged in the second cylinder along the length direction of the second cylinder, and the first partition block is arranged close to the first pressing device, a first cavity is arranged on the first partition block, a second cavity is arranged on the second partition block, the second cylinder is connected and communicated with the medicine storage device through the first pipeline, one end of the first pipeline away from the medicine storage device is fixedly arranged on the second cylinder, two ends of the second pipeline and two ends of the third pipeline are respectively connected to the second cylinder and the first cylinder, two ends of the fourth pipeline are respectively connected to the second cylinder and the injection head, when the second key is away from the second cylinder, one end of the first pipeline and one end of the second pipeline are located in the second cavity, at this time, the medicine liquid can enter the first cylinder from the medicine storage device through the first pipeline and the second pipeline, when the second key is close to the second cylinder, one end of the third pipeline and one end of the fourth pipeline are located in the first cavity, at this time, the medicine liquid can enter the injection head through the third pipeline and the fourth pipeline by pressing the first key.

[0014] In some embodiments, the injection device further comprises a liquid injection pipe, one end of the liquid injection pipe is connected and communicated with the liquid injection device, the other end of the liquid injection pipe is connected and communicated with the liquid storage device, the first pipeline is connected on the liquid injection pipe and communicated, and one end of the liquid injection pipe connected with the liquid injection device is provided with a one-way valve.

[0015] The present application has the following technical effects relative to the prior art:

[0016] The liquid storage film cover of the drug storage device is made of an easily deformable elastic material, and after use, the liquid storage film cover is attached to the bottom plate, which can compress the liquid storage cavity space to the maximum extent, so that the liquid storage cavity has less liquid storage, which can greatly avoid waste, and because the liquid storage film cover is made of an easily deformable elastic material, the liquid storage cavity can be filled with different volumes of liquid, and within the allowable range of design, the liquid storage cavity can be filled with excess liquid by stretching or expanding the film cover, so that different specifications of the device can be used to meet the needs of different doses, and the flexibility of the liquid storage can adapt to the differences in medication for different diseases, different ages (such as adults and children) or different treatment stages, and the applicability is significantly improved, and the device can be used by people with different diseases. Moreover, the liquid passage is arranged on the fixing ring, and the fixing ring is fixedly arranged on the bottom plate to provide a stable base frame to avoid liquid leakage or external pollution caused by loose connection. The liquid storage film cover is fixed on the fixing ring, and the fixing effect is good. Moreover, the elastic deformation of the film cover does not require additional power driving, and the volume adjustment can be realized by relying on the material properties, which reduces the use threshold and is suitable for rapid application in medical treatment, home care and other scenes. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0018] Figure 1 It is a structure schematic diagram of the drug storage device in some embodiments of the present application when not injecting liquid;

[0019] Figure 2 It is a structure schematic diagram of the drug storage device in some embodiments of the present application after injecting liquid;

[0020] Figure 3 It is an exploded view of the drug storage device in some embodiments of the present application;

[0021] Figure 4 It is a rear view of the drug storage device in some embodiments of the present application;

[0022] Figure 5 It is a structure schematic diagram of the injection device connected to the drug storage device in some embodiments of the present application;

[0023] Figure 6 It is a structure schematic diagram of the insulin pump in some embodiments of the present application;

[0024] Figure 7 It is a sectional view of the insulin pump in some embodiments of the present application.

[0025] In the figure: 100 - medicine storage device; 110 - liquid film cover; 120 - fixing ring; 121 - liquid passage hole; 130 - bottom plate; 131 - transparent window; 201 - first button; 202 - first cylinder; 203 - second button; 204 - second cylinder; 205 - first pipeline; 206 - second pipeline; 207 - third pipeline; 208 - fourth pipeline; 209 - liquid injection pipe; 210 - liquid injection port; 211 - first cavity; 212 - second cavity; 213 - fixing seat. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0027] The present application aims to provide a medicine storage device and an insulin pump to solve the problems existing in the prior art, so that the waste of residual medicine liquid is less, and the applicability is stronger.

[0028] In order to make the above-mentioned purposes, characteristics and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0029] As Figures 1-7As shown, the present application provides a medicine storage device 100, which comprises a bottom plate 130, a fixed ring 120 and a liquid storage film cover 110. The liquid storage film cover 110 is made of elastic material and is easy to deform. The fixed ring 120 is fixedly arranged above the bottom plate 130 and is in sealed connection with the bottom plate 130. The bottom edge of the liquid storage film cover 110 is in circumferential fit with the inner wall of the fixed ring 120 and is in sealed connection. The space between the liquid storage film cover 110 and the bottom plate 130 forms a liquid storage cavity. The fixed ring 120 is provided with a liquid passage hole 121, through which the medicine liquid or gas can enter or discharge the liquid storage cavity. The liquid storage film cover 110 is made of elastic material and is easy to deform. After use, the liquid storage film cover 110 will be attached to the bottom plate 130, which can compress the liquid storage cavity space to the greatest extent, so that the medicine liquid in the liquid storage cavity is less, which can greatly avoid waste. Moreover, due to the elastic material of the liquid storage film cover 110, the liquid storage cavity can be filled with medicine liquid of different volumes. Within the allowable range of design, the liquid storage cavity can realize excess liquid storage through the stretching or expansion of the film cover, without the need to replace different specifications of the device to meet the needs of various doses. The flexibility of the liquid storage can adapt to the differences in medication for different diseases, different ages (such as adults and children) or different treatment stages, significantly improving the applicability and being suitable for different groups of people. Moreover, the fixed ring 120 is provided with the liquid passage hole 121 and is fixedly arranged on the bottom plate 130, which provides a stable basic frame and avoids medicine leakage or external pollution caused by loose connection. The edge shape of the liquid storage film cover 110 is consistent with that of the fixed ring 120, and the liquid storage film cover 110 is fixed on the fixed ring 120, so that the fixing effect is good. Moreover, the elastic deformation of the film cover does not need additional power driving, but relies on the material properties to realize volume adjustment, which reduces the use threshold and is suitable for rapid application in medical treatment, family nursing and other scenes.

[0030] It should be noted that the shape of the liquid passage hole 121 is preferably triangular, and can also be circular, semicircular, square, oval, irregular shape, etc. which can realize the opening style of liquid and air inlet and outlet, as long as it can realize the inlet and outlet of air and medicine liquid.

[0031] In some embodiments, the medicine storage device 100 further comprises a transparent window 131, the bottom plate 130 is provided with a receiving hole, and the transparent window 131 covers the receiving hole. Specifically, the transparent window 131 is preferably provided to be the same size as the receiving hole, the transparent window 131 is arranged in the receiving hole, and the edge of the transparent window 131 is sealingly connected with the side wall of the receiving hole. The transparent window 131 is used to display the amount of liquid medicine in the liquid storage cavity. The transparent window 131 is sealingly arranged through the receiving hole on the bottom plate 130, and the residual amount or the injected amount of liquid medicine in the liquid storage cavity can be directly observed. The user can quickly grasp the real-time state of the liquid medicine without disassembling the device or using additional tools (such as a graduated measuring device). Especially in the scenarios of medical administration and experimental operation, it is convenient to accurately control the dose of medicine, avoid improper use (such as excessive or insufficient) due to ambiguous dose, and improve the convenience and accuracy of operation. The edge of the transparent window 131 is sealingly connected with the side wall of the receiving hole, which realizes the visualization function while not damaging the overall sealing of the device. It can prevent the liquid medicine in the liquid storage cavity from leaking through the gap of the transparent window 131, and can also prevent foreign matter such as dust and microorganisms from the outside from invading the liquid storage cavity through this part to pollute the liquid medicine, ensuring the cleanliness and safety of the liquid medicine during storage and use, especially suitable for the medical field with high requirements for sterile environment.

[0032] In some embodiments, the inner wall of the fixed ring 120 is a circular arc slope, and gradually approaches the center of the bottom plate 130 from high to low. When the liquid storage film cover 110 deforms due to the injection or discharge of liquid medicine, the slope can press the film cover edge through natural guiding action, reduce the sealing gap, and avoid the risk of liquid leakage caused by uneven stress on the film cover edge. Compared with the vertical inner wall, the circular arc transition is more suitable for the deformation characteristics of the elastic film cover, making the sealing effect more stable. When the liquid medicine in the liquid storage cavity decreases, the elastic liquid storage film cover 110 will gradually shrink and fit the bottom plate 130. The structure of the circular arc slope inclined from the edge to the center guides the liquid storage film cover 110 to fold towards the center of the bottom plate 130, ensuring that the corner part of the fixed ring 120 can also be fitted by the liquid storage film cover 110, avoiding local residual dead angles caused by jamming or wrinkles at the edge of the liquid storage film cover 110.

[0033] In some embodiments, the accommodation hole is triangular in shape, the transparent window is also triangular in shape, the tip vertex is arranged at the middle of the bottom plate 130, the bottom edge is arranged close to the liquid passage hole 121, and the bottom edge is a circular arc transition type, that is, the shape of the transparent window 131 is similar to a melon seed. The liquid passage hole 121 is the core passage for the drug liquid to enter and exit the liquid storage cavity, the bottom edge of the transparent window 131 is aligned with the liquid passage hole 121, and the real-time state (such as flow rate, whether there are air bubbles, etc.) when the drug liquid is injected or discharged can be directly observed, which facilitates quick judgment of whether the liquid passage is smooth and reduces operation errors caused by channel blockage or connection problems. As the drug liquid decreases, the liquid storage film cover 110 gradually adheres to the bottom plate 130, and the remaining drug liquid will converge to the center of the bottom plate 130 (especially in combination with the guidance of the circular arc inclined surface of the fixing ring 120), and the tip of the transparent window 131 extends to the middle, which can accurately capture the state of the last remaining drug liquid, ensuring that the user can clearly observe whether the drug liquid is completely discharged, avoiding misjudgment of residues caused by visual blind spots. The triangular design covers the most critical observation area (from the liquid passage hole 121 to the center of the bottom plate 130) with the smallest area, which saves more bottom plate 130 material than a large-area transparent window 131, and at the same time reduces the length of the sealing edge (only three edges of the triangle need to be sealed), thereby reducing the risk of leakage caused by a too long sealing surface, and balancing visualization and structural sealing.

[0034] In some embodiments, the sealed connection of the fixing ring 120 and the bottom plate 130 and the sealed connection of the liquid storage film cover 110 and the fixing ring 120 can be achieved by laser welding, ultrasonic welding, hot plate welding, vibration welding, hot air welding, or glue bonding. Physical welding methods such as laser welding and ultrasonic welding are suitable for various materials such as plastics (such as the elastic plastic commonly used in the liquid storage film cover 110) and metals, and are particularly suitable for the connection of the elastic material such as the liquid storage film cover 110 and the fixing ring 120, which can avoid connection failure caused by differences in material hardness; glue bonding has wider material compatibility and can adapt to some composite materials or special elastomers that are difficult to weld. The welding method (laser, ultrasonic, etc.) melts the connection part through high temperature or high frequency vibration and then fuses it, forming a molecular-level tight bond, and the sealing interface has no gaps, which can effectively block the leakage of drug liquid and the intrusion of external impurities, and is particularly suitable for medical scenarios with extremely high sealing requirements; glue bonding can form a continuous sealing layer on the connection surface by selecting a medical-grade sealant, which also achieves a reliable leakage prevention effect.

[0035] In some embodiments, the liquid storage film cover 110 is a thermoplastic elastomer (TPE). When the liquid storage cavity is filled with liquid medicine, the TPE material of the liquid storage film cover 110 can expand flexibly with the amount of liquid medicine, stably withstand internal pressure, and uniformly deform without breaking due to excessive local stress. When the liquid medicine is discharged, it can quickly contract by relying on its own elasticity, tightly adhere to the bottom plate 130, and minimize the residual liquid medicine, solving the problem of residual waste caused by insufficient deformation of traditional hard or low-elasticity materials. Moreover, the TPE can still maintain stable performance after multiple deformations and is not prone to permanent deformation, ensuring the device can be reused (if the design allows) or reliable throughout a single use. Thermoplastic elastomers have good resistance to most liquid medicines (such as water, organic solvents, weak acid and base solutions, etc.), are not prone to swelling, degradation, or release of harmful substances, avoid chemical reactions between the material and the liquid medicine that can change the drug efficacy, and are particularly suitable for the strict requirements of medical scenarios on the purity of liquid medicine.

[0036] It should be noted that the liquid storage film cover 110 can also be made of styrene-based thermoplastic elastomers (SBS, SIS, SEBS, SEPS), olefin-based thermoplastic elastomers (TPO, TPV), diene-based thermoplastic elastomers (TPB, TPI), chlorovinyl-based thermoplastic elastomers (TPVC, TCPE), thermoplastic polyurethane (TPU), polyurethane (PU), thermoplastic polyester elastomer (TPEE), thermoplastic polyamide elastomer (TPAE), organic fluorine-based thermoplastic elastomer (TPF), thermoplastic silicone elastomer, and ethylene-based thermoplastic elastomer (EVA, POE).

[0037] In some embodiments, the material of the bottom plate 130 is the same as that of the fixing ring 120, which is polycarbonate (PC) or acrylonitrile-butadiene-styrene copolymer (ABS). When using connection methods such as laser welding and ultrasonic welding, the similar molecular structures of the same materials are more easily uniformly fused after heating, forming a high-strength, gap-free sealing interface and reducing problems such as uneven welding and stress cracking caused by material differences. When the temperature changes (such as the temperature difference of the storage environment or the high temperature during the sterilization process), the expansion and contraction amplitudes of the two materials are consistent, which can avoid connection loosening or sealing failure caused by the difference in thermal expansion and cold contraction between different materials, and is particularly suitable for the high requirements of medical scenarios on stability. Polycarbonate (PC) has good transparency and high impact resistance, and is strong against falling. It can withstand high-temperature sterilization (such as steam sterilization) and has excellent chemical stability and is not easily corroded by most liquid medicines, which can ensure the safety of the liquid medicine during long-term storage. Acrylonitrile-butadiene-styrene copolymer (ABS) has balanced comprehensive mechanical properties, moderate hardness, impact resistance, and wear resistance, and can provide stable structural support for the device. The surface is easy to process (such as polishing and bonding), and the cost is usually lower than that of PC, which is suitable for cost-sensitive scenarios. It has good chemical stability and is resistant to water and most acid and base solutions, which can ensure the safety of the liquid medicine during long-term storage.

[0038] It should be noted that the bottom plate 130 and the fixing ring 120 can be made of PP (polypropylene), PET (polyethylene terephthalate), PMMA (polymethyl methacrylate), PVC (polyvinyl chloride), PU (polyurethane), TPU (thermoplastic polyurethane), PS (polystyrene), PTFE (polytetrafluoroethylene), PTEE (polytetrafluoroethylene copolymer), TFM (modified polytetrafluoroethylene), PFA (perfluoroalkoxy resin) or PEEK (polyether ether ketone) and the like.

[0039] It should be further noted that the medicine storage device 100 can be applied to various liquid storage, such as insulin, growth hormone, antibiotic, immunosuppressant, analgesic, nutrient solution. Moreover, the medicine storage device 100 can be used in various devices, and can be used in a liquid storage and infusion system, especially a medicine storage and infusion device, such as a wearable, patch type medicine infusion device, specifically a hormone infusion pump, an antibiotic infusion pump, an analgesic pump, a chemotherapy pump. Further, such as a press type insulin pump, an electronic insulin pump, a pipeline type insulin pump and the like.

[0040] The present application also provides an insulin pump, comprising a fixing seat 213, an injection device and the medicine storage device 100 in the first embodiment, the medicine storage device 100 is fixedly arranged on the fixing seat 213, the injection device is connected with and communicates with the liquid passage hole 121 of the medicine storage device 100, and the fixing seat 213 is used for being attached to the patient. The injection device is used for injecting medicine, so that the waste of residual medicine is less, and the applicability is stronger.

[0041] In some embodiments, the injection device comprises an injection head, a first pipeline 205, a second pipeline 206, a third pipeline 207, a fourth pipeline 208, a first pressing device and a second pressing device, the first pressing device is opposite to the second pressing device, the first pressing device comprises a first button 201 and a first cylinder 202, the first button 201 is slidingly arranged in the first cylinder 202, the first cylinder 202 is fixedly arranged on a fixed seat 213, the second pressing device comprises a second button 203, a second cylinder 204, a first partition block and a second partition block, the second button 203 is fixedly connected with the first partition block and the second partition block, the first partition block and the second partition block are slidingly arranged in the second cylinder 204 along the length direction of the second cylinder 204, and the first partition block is arranged close to the first pressing device, a first cavity 211 is formed in the first partition block, a second cavity 212 is formed in the second partition block, the second cylinder 204 is connected and communicated with the medicine storage device 100 through the first pipeline 205, one end of the first pipeline 205 away from the medicine storage device 100 is fixedly arranged on the second cylinder 204, two ends of the second pipeline 206 and two ends of the third pipeline 207 are respectively connected to the second cylinder 204 and the first cylinder 202, two ends of the fourth pipeline 208 are respectively connected to the second cylinder 204 and the injection head, when the second button 203 is away from the second cylinder 204, one end of the first pipeline 205 and one end of the second pipeline 206 are located in the second cavity 212, at this time, the liquid medicine can flow from the medicine storage device 100 to the first cylinder 202 through the first pipeline 205 and the second pipeline 206; when the second button 203 is close to the second cylinder 204, one end of the third pipeline 207 and one end of the fourth pipeline 208 are located in the first cavity 211, at this time, when the first button 201 is pressed, the liquid medicine can flow into the injection head through the third pipeline 207 and the fourth pipeline 208.

[0042] Medicine taking state: the second button 203 is pulled outward to provide an extraction action, the ports of the first pipeline 205 and the second pipeline 206 are located in the second cavity 212 of the second partition block, the liquid medicine in the medicine storage device 100 can flow into the second cylinder 204 through the first pipeline 205, and then flow into the first cylinder 202 through the second pipeline 206, to complete the medicine taking preparation.

[0043] Injection state: press the second button 203 and the first button 201, the ports of the third pipeline 207 and the fourth pipeline 208 are located in the first cavity 211 of the first partition block, at this time, press the first button 201, the pre-stored drug liquid in the first cylinder 202 enters the injection head through the third pipeline 207 and the fourth pipeline 208, and the injection is completed. The first cylinder 202 can be used as a dose temporary storage cavity. When switched to the medicine taking state through the second button 203, the required dose of drug liquid can be first introduced from the medicine storage device 100 into the first cylinder 202, and then precise injection can be realized by pressing the first button 201 (such as the button stroke corresponding to the fixed dose), which is especially suitable for fine control of small dose of insulin, and avoids dose fluctuation when directly extracting from the medicine storage device 100.

[0044] In summary, when the second button 203 is pressed down, the first pipeline and the second pipeline are in a closed state, and the third pipeline and the fourth pipeline are in a connected state; when the second button 203 is popped up, the third pipeline and the fourth pipeline are in a closed state, and the first pipeline and the second pipeline are in a connected state. When the first button 201 is pressed down, the cavity volume between the first button 201 and the first cylinder 202 is reduced, and the liquid drug or air in the cavity is discharged through the second pipeline or the third pipeline (only when the other end of the second pipeline or the third pipeline is not in a closed state).

[0045] It should be noted that a spring structure can be arranged between the first button 201 and the first cylinder 202 and between the second button 203 and the second cylinder 204, and the back shell automatically rebounds to the original position after each pressing.

[0046] In some embodiments, the insulin pump further comprises a liquid injection pipe 209, one end of the liquid injection pipe 209 is provided with a liquid injection port 210, the liquid injection port 210 is connected and communicated with the liquid injection device, the other end of the liquid injection pipe 209 is connected and communicated with the liquid storage device, the first pipeline 205 is connected to the liquid injection pipe 209 and communicated, and the end of the liquid injection pipe 209 connected to the liquid injection device is provided with a one-way valve. The one-way valve at the end of the liquid injection pipe 209 connected to the liquid injection device can strictly limit the one-way flow of the drug liquid from the liquid injection device to the liquid storage device. Avoiding the backflow of the drug liquid in the medicine storage device 100 due to the pressing action of the injection device (such as negative pressure generated when the first button 201 returns to the original position) or external pressure fluctuation, preventing the drug liquid in the medicine storage cavity from being contaminated (such as impurities entering the liquid storage cavity with backflow at the interface of the liquid injection device), ensuring that the dose only enters but does not exit when the liquid injection device supplements the medicine storage device 100 with drug liquid each time, precisely controlling the total amount of drug liquid in the medicine storage cavity, avoiding misjudgment of the actual medicine storage amount caused by backflow, which is especially important for insulin treatment which needs to strictly record the remaining amount of medicine.

[0047] The principles and implementation manners of the present application are described by using specific examples in the present application, and the above examples are only used for helping to understand the method of the present application and its core idea; meanwhile, for the general technical personnel in the art, according to the idea of the present application, the specific implementation manners and application ranges will be changed. In conclusion, the content of the present specification should not be understood as the limitation of the present application.

Claims

1. A medication storage device, characterized by: The device comprises a bottom plate, a fixing ring and a liquid storage film cover, the fixing ring is fixedly arranged above the bottom plate and is in sealed connection with the bottom plate, the bottom edge of the liquid storage film cover is in circumferential fit with the inner wall of the fixing ring and is in sealed connection, the space between the liquid storage film cover and the bottom plate forms a liquid storage cavity, the fixing ring is provided with a liquid passage hole, and liquid medicine or gas can enter or discharge the liquid storage cavity through the liquid passage hole.

2. The medication holder of claim 1, wherein: The device further comprises a transparent window, the bottom plate is provided with a containing hole, the transparent window covers the containing hole, and the transparent window is in sealed connection with the containing hole.

3. The medication holder of claim 1, wherein: The inner wall of the fixing ring is a circular arc slope, and the height gradually decreases towards the center of the bottom plate.

4. The medication holder of claim 2, wherein: The containing hole is triangular, the edge of the containing hole is a circular arc transition, and the tip vertex of the containing hole is arranged at the middle part of the bottom plate, and the bottom edge is arranged close to the liquid passage hole.

5. The medication holder of claim 1, wherein: The sealed connection between the fixing ring and the bottom plate and the sealed connection between the liquid storage film cover and the fixing ring can be realized by laser welding, ultrasonic welding, hot plate welding, vibration welding, hot air welding or glue bonding.

6. The medication holder of claim 1, wherein: The liquid storage film cover is a thermoplastic elastomer.

7. The medication holder of claim 1, wherein: The material of the bottom plate is the same as that of the fixing ring, which is polycarbonate or acrylonitrile-butadiene-styrene copolymer.

8. An insulin pump characterized by: The device comprises an injection device and a medicine storage device as claimed in any one of claims 1-7, the injection device is connected and communicated with the liquid passage hole of the medicine storage device, and the injection device is used for injecting medicine.

9. The insulin pump of claim 8, wherein: The injection device comprises an injection head, a first pipeline, a second pipeline, a third pipeline, a fourth pipeline, a first pressing device and a second pressing device. The first pressing device and the second pressing device are oppositely arranged. The first pressing device comprises a first key and a first cylinder. The first key is slidingly arranged in the first cylinder. The first cylinder is fixedly arranged on the fixed seat. The second pressing device comprises a second key, a second cylinder, a first partition block and a second partition block. The second key is fixedly connected with the first partition block and the second partition block. The first partition block and the second partition block are slidingly arranged in the second cylinder along the length direction of the second cylinder. The first partition block is arranged close to the first pressing device. A first cavity is arranged on the first partition block. A second cavity is arranged on the second partition block. The second cylinder is connected and communicated with the medicine storage device through the first pipeline. One end of the first pipeline away from the medicine storage device is fixedly arranged on the second cylinder. Two ends of the second pipeline and two ends of the third pipeline are respectively connected to the second cylinder and the first cylinder. Two ends of the fourth pipeline are respectively connected to the second cylinder and the injection head. When the second key is away from the second cylinder, one end of the first pipeline and one end of the second pipeline are located in the second cavity. At this time, the medicine can enter the first cylinder from the medicine storage device through the first pipeline and the second pipeline. When the second key is close to the second cylinder, one end of the third pipeline and one end of the fourth pipeline are located in the first cavity. At this time, the medicine can enter the injection head through the third pipeline and the fourth pipeline by pressing the first key.

10. The insulin pump of claim 9, wherein: The injection device further comprises a liquid injection pipe. One end of the liquid injection pipe is connected and communicated with the liquid injection device. The other end of the liquid injection pipe is connected and communicated with the liquid storage device. The first pipeline is connected to the liquid injection pipe and communicated. One end of the liquid injection pipe connected with the liquid injection device is provided with a one-way valve.

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