Patch-type drug infusion system

Abstract

The application discloses a patch type medicine infusion system, which comprises an infusion structure, the infusion structure comprising: a medicine storage cylinder for containing medicine to be infused, provided with a medicine inlet and a medicine outlet; an infusion needle, one end of which is communicated with the medicine outlet of the medicine storage cylinder, and the other end of which is sent to the subcutaneous tissue to realize medicine infusion; a control structure, which is connected with the infusion structure to control medicine infusion; an adhesive patch, which can be used to paste the infusion structure and / or the control structure on the skin surface; and an injection structure, which is used to inject the medicine to be infused into the medicine storage cylinder through the medicine inlet, the volume of the injection structure is intentionally set to be greater than the volume of the medicine to be infused, and the excess space in the injection structure is used to generate negative pressure to extract air in a medicine pipeline, so that the risk of air being infused into the body is reduced, the safety hidden danger is reduced, and the user experience is improved.

Description

Technical Field

[0001] This invention relates primarily to the field of medical devices, and in particular to a patch-type drug infusion system and its infusion method. Background Technology

[0002] In a healthy person, the pancreas automatically monitors blood glucose levels and secretes the necessary insulin / glucagon. However, in diabetic patients, the pancreas malfunctions and cannot secrete insulin as required. Therefore, diabetes is a metabolic disease caused by abnormal pancreatic function and is listed by the World Health Organization as one of the three major chronic diseases. Currently, medical technology cannot cure diabetes; it can only control the occurrence and development of diabetes and its complications by stabilizing blood sugar levels.

[0003] Diabetic patients using insulin pumps need to have insulin pre-filled into the infusion device and their blood glucose levels monitored before injecting insulin. Currently, most monitoring methods can continuously monitor blood glucose and transmit the data in real-time to a remote device for user viewing; this method is called Continuous Glucose Monitoring (CGM). This method requires a device to be attached to the skin surface, with its probe inserted into the subcutaneous tissue fluid to complete the measurement. Based on the blood glucose level detected by CGM, the infusion system simulates an artificial pancreas, meeting the insulin demand in a closed-loop or semi-closed-loop manner.

[0004] However, the drug delivery lines of current infusion structures contain air when they leave the factory, and this air is not vented during the drug filling process. This increases the risk of air being injected into the body, creating a safety hazard.

[0005] Therefore, there is an urgent need for a patch-type drug infusion system and its infusion method that can vent air during the drug delivery process. Summary of the Invention

[0006] This invention discloses a patch-type drug infusion system. The volume of the injection structure is intentionally designed to be larger than the volume of the drug to be infused. During the infusion process, the extra space of the injection structure can be used to generate negative pressure to extract air from the drug tubing, reducing the risk of air being injected into the body, reducing safety hazards, and improving user experience.

[0007] This invention discloses a patch-type drug infusion system, comprising an infusion structure including: a drug reservoir for holding the drug to be infused, having a drug inlet and a drug outlet; an infusion needle, one end of which is connected to the drug outlet of the drug reservoir, and the other end which is inserted subcutaneously to achieve drug infusion; a control structure connected to the infusion structure to control the drug infusion; an adhesive patch for attaching the infusion structure and / or the control structure to the skin surface; and an injection structure for injecting the drug to be infused into the drug reservoir through the drug inlet. The volume of the injection structure is intentionally set to be larger than the volume of the drug to be infused, and the excess space in the injection structure generates negative pressure to extract air from the drug tubing.

[0008] According to one aspect of the invention, the volume of the injection structure is intentionally set to be greater than the volume of the drug reservoir.

[0009] According to one aspect of the invention, the volume of the injection structure is 1-2 mL larger than the volume of the drug reservoir.

[0010] According to one aspect of the invention, the volume of the drug storage container is 1-5 mL.

[0011] According to one aspect of the invention, the volume of the drug storage container is 1-2 mL.

[0012] According to one aspect of the invention, the volume of the injection structure is at least 20% larger than the volume of the drug reservoir.

[0013] According to one aspect of the invention, the drug inlet further includes an elastic seal that can automatically seal the drug inlet to prevent drug leakage after the drug is filled into the storage cylinder.

[0014] According to one aspect of the invention, the control structure and the infusion structure are separate structures, and the control unit can be reused.

[0015] According to one aspect of the invention, the control structure and the infusion structure are an integrated structure that is disposable after single use.

[0016] According to one aspect of the invention, the control structure is provided with a plurality of first electrical contacts exposed on the surface of the control structure, and the infusion structure is provided with second electrical contacts corresponding to the first electrical contacts. The first electrical contacts and the second electrical contacts press against each other, thereby electrically connecting the control structure and the infusion structure.

[0017] According to one aspect of the invention, the first electrical contact or the second electrical contact is a rigid metal contact or an elastic conductive element.

[0018] According to one aspect of the invention, a buzzer is also included, which is non-enclosedly disposed within the control structure.

[0019] According to one aspect of the invention, a flexible circuit board is further provided within the infusion structure.

[0020] According to one aspect of the invention, the infusion structure further includes a housing, which includes an upper housing and a lower housing, the lower housing including an outward extension, and a blocking block is provided on the outer side of the extension.

[0021] The present invention also discloses a drug infusion method for a patch-type drug infusion system. Before the drug is infused into the drug reservoir, the negative pressure generated by the extra space difference of the injection structure is used to extract and expel the air in the drug pipeline, thereby reducing the risk of air being injected into the body, reducing safety hazards, and improving user experience.

[0022] This invention also discloses a drug infusion method for a patch-type drug infusion system, used to infuse the drug to be infused into the infusion structure, comprising: Step 1: drawing the drug to be infused from the drug storage bottle into the injection structure, wherein the volume of the injection structure is intentionally designed to be larger than the volume of the drug to be infused; Step 2: inserting the injection structure into the drug inlet of the infusion structure and evacuating the air from the drug tubing of the infusion structure; Step 3: removing the injection structure and venting the air; Step 4: inserting the injection structure back into the drug inlet of the infusion structure.

[0023] According to one aspect of the invention, an exhaust step may be included between step one and step two.

[0024] According to one aspect of the invention, the venting step may occur in the reservoir or after the injection structure has been removed from the reservoir.

[0025] According to one aspect of the invention, the volume of the injection structure is intentionally set to be greater than the volume of the drug reservoir.

[0026] According to one aspect of the invention, the infusion structure and the control structure can be electrically connected before or after the drug administration process can occur.

[0027] The present invention also discloses another drug infusion method for patch-type drug infusion systems. After the drug is infused into the drug reservoir, the air in the drug tubing is extracted and discharged by the injection structure, which reduces the risk of air being injected into the body, reduces safety hazards, and improves user experience.

[0028] This invention also discloses another method for administering medication to a patch-type drug infusion system, comprising: Step 1: drawing the drug to be infused from the storage bottle into the injection structure; Step 2: inserting the injection structure into the drug inlet of the infusion structure and filling it with the drug to be infused; Step 3: pulling the push rod of the injection structure to extract air from the drug tubing of the infusion structure.

[0029] According to one aspect of the invention, an exhaust step may be included between step one and step two.

[0030] According to one aspect of the invention, the venting step may occur in the reservoir or after the injection structure has been removed from the reservoir.

[0031] According to one aspect of the invention, the infusion structure and the control structure may be electrically connected before or after the drug delivery process may occur.

[0032] Compared with the prior art, the technical solution of the present invention has the following advantages:

[0033] In the patch-type drug infusion system disclosed in this invention, the volume of the injection structure is intentionally set to be larger than the volume of the drug to be infused. During the infusion process, the excess space in the injection structure can be used to generate negative pressure to extract air from the drug tubing, reducing the risk of air being injected into the body, minimizing safety hazards, and improving user experience. Secondly, the control structure has multiple first electrical contacts exposed on its surface; the infusion structure has multiple second electrical contacts. The small contact area of ​​the electrical contacts allows for flexible design, effectively reducing the volume of the control structure. Thirdly, the first and second engaging parts engage with each other, and the first and second electrical contacts press against each other, thereby electrically connecting the control structure and the infusion structure. The control structure and the infusion structure are electrically connected through the pressing electrical contacts, optimizing circuit design and improving the reliability of the electrical connection.

[0034] Furthermore, the volume of the injection structure is intentionally set to be larger than that of the drug reservoir, allowing the maximum amount of drug to be infused to be injected simultaneously with venting during the infusion process. This increases the drug's usage time, reduces the frequency of drug infusion system replacement, improves user experience, and enhances the accuracy of the actual volume of drug injected into the reservoir, thereby improving the accuracy of drug infusion.

[0035] Furthermore, the drug inlet also includes an elastic seal that can automatically seal the drug inlet after the drug is poured into the storage cylinder, preventing drug leakage and air ingress.

[0036] In the drug infusion method for patch-type drug infusion systems disclosed in this invention, before the drug is infused into the drug reservoir, the extra space in the injection structure is used to generate negative pressure to extract and expel air from the drug tubing, thereby reducing the risk of air being injected into the body and minimizing safety hazards.

[0037] Furthermore, an venting step is included after the drug is drawn from the reservoir into the injection structure, which can further reduce the risk of air being introduced into the drug delivery system.

[0038] Furthermore, the volume of the injection structure is intentionally set to be larger than that of the reservoir, allowing the maximum amount of drug to be infused to be injected simultaneously with venting during the infusion process. This increases the drug's lifespan, reduces the frequency of drug infusion system replacement, improves user experience, and enhances the accuracy of the actual volume of drug injected into the reservoir, thereby improving the accuracy of drug infusion.

[0039] Furthermore, the infusion and control structures can be electrically connected before or after the drug infusion process, improving the versatility and convenience of pre-infusion operations.

[0040] In another drug infusion method for patch-type drug infusion systems disclosed in this invention, after the drug is infused into the drug reservoir, the air in the drug tubing is extracted and discharged using an injection structure, reducing the risk of air being injected into the body and minimizing safety hazards.

[0041] Furthermore, an venting step is included after the drug is drawn from the reservoir into the injection structure, which can further reduce the risk of air being introduced into the drug delivery system. Attached Figure Description

[0042] Figures 1a-1b These are top views of drug infusion systems according to two different embodiments of the present invention;

[0043] Figure 2a This is a three-dimensional structural diagram of the front of the control structure according to an embodiment of the present invention;

[0044] Figure 2b This is a three-dimensional structural diagram of the bottom surface of the control structure according to an embodiment of the present invention;

[0045] Figure 2c This is a front perspective view of the control structure with the upper outer shell removed according to an embodiment of the present invention;

[0046] Figure 3a This is a three-dimensional structural diagram of an infusion structure according to an embodiment of the present invention;

[0047] Figure 3b This is a side view of the control structure and the infusion structure being assembled together according to an embodiment of the present invention;

[0048] Figure 3c This is a top view of the lower housing of the infusion structure according to an embodiment of the present invention;

[0049] Figure 3d This is a top view of the lower housing of the infusion structure according to another embodiment of the present invention;

[0050] Figure 3eThis is a schematic diagram of the infusion needle unit of an infusion structure according to an embodiment of the present invention;

[0051] Figure 3f This is a schematic diagram of the drug reservoir and cavity of an infusion structure according to an embodiment of the present invention;

[0052] Figures 4a-4b These are two perspective views illustrating the internal structure of an infusion structure according to an embodiment of the present invention.

[0053] Figure 5 A flowchart illustrating a method for administering medication according to an embodiment of the present invention;

[0054] Figure 6 A flowchart illustrating a method for administering medication according to another embodiment of the present invention. Detailed Implementation

[0055] As mentioned earlier, existing patch-type drug infusion systems do not expel air from the drug reservoir during the drug infusion process, thus increasing the risk of air being injected into the body and posing a safety hazard.

[0056] To address this issue, this invention provides a patch-type drug infusion system. The volume of the injection structure is intentionally set to be larger than the volume of the drug to be infused. During infusion, the extra space in the injection structure generates negative pressure to extract air from the drug tubing, reducing the risk of air being injected into the body, minimizing safety hazards, and improving the user experience. This invention also provides a method for infusing the patch-type drug infusion system where the volume of the drug to be infused is smaller than the volume of the injection structure. Before the drug is infused into the reservoir, the extra space in the injection structure generates negative pressure to extract and expel air from the drug tubing, further reducing the risk of air being injected into the body, minimizing safety hazards, and improving the user experience. This invention also discloses another method for infusing the patch-type drug infusion system where, after the drug is infused into the reservoir, the injection structure can be used to extract and expel air from the drug tubing, further reducing the risk of air being injected into the body, minimizing safety hazards, and improving the user experience.

[0057] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be understood that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments should not be construed as limiting the scope of the invention.

[0058] Furthermore, it should be understood that, for ease of description, the dimensions of the various components shown in the accompanying drawings are not necessarily drawn to actual scale; for example, the thickness, width, length, or distance of some units may be enlarged relative to other structures.

[0059] The following description of exemplary embodiments is merely illustrative and is not intended to limit the invention or its application or use in any way. Techniques, methods, and apparatus known to those skilled in the art may not be discussed in detail herein, but where applicable, such techniques, methods, and apparatus should be considered part of this specification.

[0060] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined or described in a figure, it will not need to be discussed further in the subsequent description of the figures.

[0061] Figures 1a-1b This is a top view of a drug infusion system according to two different embodiments of the present invention.

[0062] The patch-type drug delivery system includes: an adhesive patch 150, a control structure 100, an infusion structure 110, and an injection structure 120.

[0063] Infusion structure 110 includes various units for realizing the mechanical function of drug infusion, such as drug reservoir 131 (e.g. Figure 4a As shown), it is used to hold the drug to be infused and has a piston inside; infusion needle unit 121 (as shown) Figure 3b As shown), one end is connected to the drug outlet of the drug reservoir, and the other end is delivered subcutaneously to achieve drug infusion; a drive unit (not shown) pushes the piston to inject the drug into the body; and other electronic control units and auxiliary units.

[0064] The control structure 100 can establish wireless communication with a remote device to receive signals or information from the remote device or a body fluid parameter detection device (such as a continuous glucose monitoring device), and then control the power output of the drive unit inside the control infusion structure 110 to control drug infusion.

[0065] The injection structure 120 is used to draw the drug from the drug reservoir into the injection structure and then into the drug reservoir 131 of the infusion structure 110. The drug is then directly infused from the drug reservoir 131 into the subcutaneous tissue via the infusion needle unit 121 of the infusion structure 110.

[0066] The adhesive patch 150 is used to adhere wholly or partially to the skin surface of the infusion structure 110 and / or control structure 100.

[0067] In this embodiment of the invention, the control structure 100 and the infusion structure 110 are separate designs, connected by a waterproof plug or directly snapped together and electrically connected to form a whole. Directly snapping together and electrically connecting the control structure 100 and the infusion structure 110 to form a whole improves the reliability of the electrical connection, as will be detailed below. The control structure 100 is reusable, while the infusion structure 110 is disposable after single use. Figure 1a As shown. In another embodiment of the invention, the infusion structure 110 and the control structure 100 are an integrated design, connected by a wire, and housed inside the same housing 10. They are disposable after single use, as shown. Figure 1b As shown.

[0068] Figure 2a This is a three-dimensional structural diagram of the front of the control structure according to an embodiment of the present invention; Figure 2b This is a three-dimensional structural diagram of the bottom surface of the control structure according to an embodiment of the present invention; Figure 2c This is a front perspective view of the control structure after removing the upper outer shell 101a according to an embodiment of the present invention.

[0069] As mentioned earlier, the reliability of the electrical connection can be improved when the control structure 100 and the infusion structure 110 are directly snapped together and electrically connected into a whole. The two structures and the injection structure 120 will be described separately below.

[0070] The control structure 100 has a housing 101 containing a program module for receiving signals or issuing control commands, a circuit board 107, and related electronic components, as well as other physical components or structures necessary for realizing the infusion function, which are not specifically limited here. The housing 101 includes an upper housing 101a and a lower housing 101b. In some embodiments of the present invention, a power supply is also provided in the control structure. In an embodiment of the present invention, the power supply 133 is provided in the infusion structure 110, as described below.

[0071] The control structure 100 also includes a first electrical connection portion 103 exposed on the surface of the control structure 100. The first electrical connection portion 103 serves as a circuit connection terminal, used to electrically connect the internal circuits disposed in the control structure 100 and the infusion structure 110 respectively. The embodiments of the present invention do not impose specific limitations on the location of the first electrical connection portion 103. Specifically, in the embodiments of the present invention, the first electrical connection portion 103 is a plurality of first electrical contacts 103. Compared with the connection terminal disposed as a plug-in, the contact area of ​​the electrical contacts is smaller, allowing for flexible design and effectively reducing the volume of the control structure. Simultaneously, the electrical contacts can be directly electrically connected to internal circuits or electrical components, or can be directly soldered onto a circuit board, optimizing the design of the internal circuit and effectively reducing the complexity of the circuit, thus saving costs and reducing the volume of the infusion device. Furthermore, the electrical contacts being exposed on the surface of the control structure 100 facilitates mutual electrical connection with connection terminals on other structures.

[0072] The first electrical contact 103 may be a rigid metal contact or an elastic conductive element. Preferably, in this embodiment of the invention, the first electrical contact 103 is a rigid metal contact. One end of the first electrical contact 103 is electrically connected to a connection terminal disposed inside the control structure 100, and the other end is exposed on the surface of the lower housing 101b. The remaining portion of the first electrical contact 103 is tightly embedded in the housing 101b to isolate the interior of the control structure 100 from the outside.

[0073] Here, the elastic conductive element includes a conductive spring, conductive silicone, conductive rubber, or conductive sheet, etc. Clearly, one end of the elastic conductive element is used for electrical connection with a connection terminal inside the control structure 100, and the other end is used for electrical connection with other connection terminals. For example, in one embodiment of the invention, the first electrical contact 103 is a conductive spring. When the electrical contacts come into contact with each other, the elasticity of the conductive spring enhances the reliability of the electrical connection. Similar to rigid metal contacts, except for one end exposed on the surface of the lower housing 101b, the other part of the conductive spring is tightly embedded in the housing 101 and electrically connected to the internal circuitry or electrical components. Clearly, the connection terminal located inside the control structure 100 can be a conductive lead or a specific part of a circuitry or electrical component.

[0074] It should be noted that, in this embodiment of the invention, "tightly embedded" means that there is no gap between the electrical contacts and the housing 101, thereby achieving a seal on the interior of the control structure 100. The term "tightly embedded" will be used in the following text for the same purpose.

[0075] In another embodiment of the present invention, the first electrical contact 103 is a conductive spring, but it is not tightly embedded in the housing 101. Instead, a sealing element is provided around the area where the first electrical contact 103 is located. The sealing element is located in a groove to achieve sealing of the electrical connection position and the interior of the control structure 100.

[0076] In an embodiment of the present invention, the control structure 100 is further provided with a first engaging portion 102. The first engaging portion 102 is used to engage with the second engaging portion 112 of the infusion structure 110, so as to realize the mutual assembly of the control structure 100 and the infusion structure 110, thereby enabling the first electrical contact 103 and the second electrical contact 113 (e.g., Figure 3a and Figure 3b The electrical connections (as shown) will be described in detail below.

[0077] The first engaging part 102 and the second engaging part 112 include one or more of the following: hooks, blocks, holes, and slots that can engage with each other. Their positions can be flexibly designed according to the shape and structure of the control structure 100 and the infusion structure 110, such as being located inside or on the surface of the corresponding structure. No specific restrictions are imposed here.

[0078] In this embodiment of the invention, the control structure 100 is further provided with a recess 104 for mutual assembly with the protrusion 114 at the bottom of the infusion structure 110 housing, as will be described in detail below. Specifically, the first electrical contact 103 is disposed within the recess 104, such as... Figure 2b As shown.

[0079] In this embodiment of the invention, an alarm device is also included that is not enclosed and is disposed within the control structure 100. The housing 101 of the control structure 100 has at least one unenclosed area. In cases such as the start or end of infusion, malfunction of the infusion device, drug depletion, or the control structure 100 issuing or receiving erroneous commands or information, the alarm device emits light, sound, or vibration alarm signals to alert the user and allow for timely adjustments. The alarm device can be one or more of a light-emitting alarm, an audio alarm, or a vibration alarm; no specific limitation is made here.

[0080] In this embodiment of the invention, the non-enclosed area provided on the outer shell 101 of the control structure 100 is one or more through holes, and its shape can be circular, square, triangular, polygonal, irregular, or any other arbitrary shape; the arrangement can be single row, multiple rows, or random arrangement. The location of the non-enclosed area on the outer shell 101 of the control structure 100 is not limited. Specifically, it can be provided only on the upper shell 101a or the lower shell 101b, or simultaneously on both the upper shell 101a and the lower shell 101b. The location on the upper shell 101a or the lower shell 101b is also not limited. Specifically, it can be provided on the upper side, front side, left side, or right side of the upper shell 101a or the lower shell 101b. It can be provided on only one side, or simultaneously on multiple sides. The number, shape, and arrangement of the non-enclosed areas on each side are not limited; they can be the same or different. That is, the location, shape, size, number, and arrangement of the non-enclosed area on the outer shell 101 are not limited, as long as the alarm signal can be transmitted. Preferably, in this embodiment of the invention, the non-enclosed area is a through hole provided along each edge of the alarm, that is, the setting position of the non-enclosed area is adapted to the position of the alarm, which makes it easier for the alarm signal to be transmitted, so that the user can notice it, reduce the power consumption of the alarm, optimize the power consumption configuration of the infusion device, and save production costs.

[0081] Because the alarm is not enclosed within the control structure, compared to traditional enclosed alarm designs, when the alarm is an audio alarm, a low-volume sound is sufficient for the user to detect it, reducing energy consumption. When the alarm is a luminous alarm, the light emitted through the unenclosed area is more easily detected by the user, further reducing energy consumption. This is especially true when the outer shell 101 of the control structure 100 is made of a non-transparent material, where the light transmission effect is even more pronounced, further reducing energy consumption. When the alarm is a vibration alarm, the unenclosed area reduces the weight of the infusion device, requiring less power to generate vibration that the user can detect. Based on these reasons, when the alarm is a combination of audio, luminous, and vibration alarms, or a single alarm that combines multiple alarm signals such as light, sound, or vibration, the unenclosed design within the control structure 100 allows the alarm signals to pass through the unenclosed area, making them more easily detected by the user, further reducing power consumption, optimizing the power consumption configuration of the infusion device, and saving production costs.

[0082] Specifically, in this embodiment of the invention, the alarm is an audio alarm. Preferably, in this embodiment, the audio alarm is a buzzer 106, installed on a circuit board 107 within the control structure 100. The buzzer 106 emits sound and vibration alarm signals when the infusion begins or ends, when the infusion device malfunctions, when the medication is exhausted, or when the control structure 100 issues an erroneous command or receives an erroneous message, so that the user can be aware and make timely adjustments. More specifically, in this embodiment, the buzzer 106 is a piezoelectric buzzer. In this embodiment, the non-enclosed area on the housing 101 of the control structure 100 is at least one sound-permeable hole 105, facilitating the transmission of the sound alarm signal from the buzzer 106. As mentioned above, the shape, size, number, arrangement, and position of the sound-permeable holes 105 on the housing 101 are not limited and will not be described further here, as long as they allow sound to pass through. Preferably, in this embodiment, the sound-permeable holes 105 are a row of densely packed but separated small holes located on the side of the lower housing 101b. The diameter of the small hole is very small, smaller than the size of a typical water droplet, which prevents water droplets from entering the control structure 101. The position of the sound-transmitting hole 105 is adapted to the position of the buzzer 106, and its overall length span is slightly larger than the edge length of the buzzer 106, so that the audible alarm signal of the buzzer 106 can be transmitted more easily, reducing the power consumption of the buzzer, optimizing the power consumption configuration of the infusion device, and saving production costs.

[0083] To ensure a good seal and proper functioning of the buzzer, a waterproof and sound-permeable membrane 108 is provided between the sound-permeable hole 105 and the buzzer 106. Therefore, the waterproof and sound-permeable membrane needs a certain porosity to prevent water molecules from entering the buzzer while ensuring sound transmission. Specifically, in this embodiment of the invention, the waterproof and sound-permeable membrane 108 is composed of small pores with a diameter of 0.1-1 micrometer, achieving a waterproof and dustproof rating of IP68.

[0084] Compared with the traditional technical solution of enclosing the buzzer inside the control structure 100, the addition of the sound-permeable hole 105 and the waterproof sound-permeable membrane 108 allows the buzzer to be heard by the user with a smaller sound, reducing the energy consumption of the buzzer, optimizing the power consumption configuration of the infusion device, and saving production costs.

[0085] Figure 3a This is a three-dimensional structural diagram of the infusion structure 110 according to an embodiment of the present invention. Figure 3b This is a side view of the control structure 100 and the infusion structure 110 being assembled together according to an embodiment of the present invention. Figure 3c This is a top view of the lower housing of the infusion structure according to an embodiment of the present invention. Figure 3d This is a top view of the lower housing of the infusion structure according to another embodiment of the present invention. Figure 3e This is a schematic diagram of the infusion needle unit of an infusion structure according to an embodiment of the present invention. Figure 3f This is a schematic diagram of the drug reservoir and cavity of an infusion structure according to an embodiment of the present invention.

[0086] The patch-type drug infusion system also includes an infusion structure 110. Its housing houses mechanical units, electrical control units, and other auxiliary units for completing drug infusion, which will be described in detail below. The housing of the infusion structure 110 may include multiple parts. As in this embodiment of the invention, the housing of the infusion device includes an upper housing 111a and a lower housing 111b.

[0087] As described above, in this embodiment of the invention, the infusion structure 110 is provided with a second engaging portion 112. The second engaging portion 112 is used to engage with the first engaging portion 102. Therefore, the positions of the first engaging portion 102 and the second engaging portion 112 correspond to each other.

[0088] In this embodiment of the invention, the infusion structure 110 is provided with a second electrical connection portion 113, which is used to electrically connect with a corresponding first electrical connection portion 103 to achieve electrical connection between the control structure 100 and the infusion structure 110. Specifically, the second electrical connection portion 113 comprises multiple second electrical contacts 113. The technical advantages of electrical contacts apply to both the first electrical contacts 103 on the control structure 100 and the second electrical contacts 113 on the infusion structure 110, which will not be described in detail here. The second electrical contacts 113 are used to press against the corresponding first electrical contacts 103 to achieve electrical connection between the control structure 100 and the infusion structure 110. The pressing between two electrical contacts with different structures can improve the reliability of the electrical connection. Similar to the first electrical contacts 103, the second electrical contacts 113 can also be rigid metal contacts or elastic conductive elements. Specifically, in this embodiment of the invention, the second electrical contact 113 is a conductive spring. Similarly, a conductive spring can improve the electrical connection performance. A groove is provided around the area where the second electrical contact 113 is located, and a seal 115 is provided in the groove.

[0089] Preferably, in this embodiment of the invention, the two ends of the conductive spring have different diameters, with a shorter diameter exposed outside the infusion structure 110 and a longer diameter inside the infusion structure 110. The longer diameter can keep the conductive spring inside the housing. Therefore, when the control structure 100 is not installed on the infusion structure 110, the longer diameter can prevent the conductive spring from falling off the infusion structure 110.

[0090] The embodiments of the present invention do not limit the position of the second electrical contact 113, as long as it can be electrically connected to the corresponding first electrical contact 103. Specifically, in the embodiments of the present invention, the bottom of the upper housing 111a of the infusion structure 110 includes a protrusion 114. The second electrical contact 113 is disposed on the protrusion 114, such as... Figure 3a As shown, the protrusion 114 corresponds to the recess 104 on the control structure 100, and the two can be assembled together so that the first electrical contact 103 and the corresponding second electrical contact 113 are pressed against each other, thereby realizing electrical connection.

[0091] In other embodiments of the present invention, the protrusion 114 may be disposed on the lower housing 111b, or when the housing of the infusion structure 110 is an integral unit, the protrusion 114 may be part of the integral housing, and no specific limitation is made here.

[0092] The control structure 100 and the infusion structure 110 are assembled in several ways, including pressing the control structure 100 onto the infusion structure 110 along its thickness direction, so that the first engaging portion 102 and the second engaging portion 112 engage with each other; or pressing the control structure 100 onto the infusion structure 110 along its length direction; or pressing the control structure 100 at any angle between the thickness direction and the length direction of the infusion structure 110, so that the first engaging portion 102 and the second engaging portion 112 engage with each other. Preferably, in this embodiment of the invention, the control structure 100 and the infusion structure 110 are assembled in such a way that the control structure 100 is pressed onto the infusion structure 110 along its thickness direction, so that the first engaging portion 102 and the second engaging portion 112 engage with each other, such as... Figure 3b The installation direction is shown.

[0093] In this embodiment of the invention, the lower housing 111b of the infusion structure 110 includes an outwardly extending portion 116, and a blocking block 117 is provided on the outer side of the extending portion 116, such as... Figure 3a As shown. As described above, when the control structure 100 is pressed to the engaged position along the thickness direction of the infusion structure 110, the blocking block 117 prevents the control structure 100 from falling off along the length direction of the infusion structure 110, ensuring the normal operation of the infusion device. Obviously, in other embodiments of the present invention, if the control structure 100 is pressed to the engaged position in other directions, adjusting the position of the blocking block 117 can also prevent the control structure 100 from falling off the infusion structure 110.

[0094] It should be noted here that "outward" and "outer side" are relative to the main body of the infusion structure 110, and are relative positional concepts. The positional relationship is as follows: Figure 3a or Figure 3b As shown. The meaning of "outer side" in the following text is the same as here.

[0095] In this embodiment of the invention, a pressing part 118 is also provided at the outer end of the extension 116 to release the blocking effect of the blocking block 117. When the user replaces the infusion structure 110, pressing the pressing part 118 with a finger will release the blocking block 117 from the control structure 100. The user can then use two fingers to remove the control structure 100 from the infusion structure 110.

[0096] This embodiment of the invention may also include an unlocking hole 119. The unlocking hole 119 is located on the inner side of the blocking block 117. While pressing the pressing part 118, the index finger can smoothly enter the unlocking hole 119, thereby pushing out the control structure 100 and separating the control structure 100 from the infusion structure 110. In this embodiment of the invention, the unlocking hole 119 is square. The square unlocking hole 119 facilitates the smooth entry of the finger. In other embodiments of the invention, the unlocking hole 119 may also be other shapes, and no specific limitation is made here.

[0097] The lower housing 111b of the infusion structure 110 is also provided with a crease groove 140. The crease groove 140 is located on both sides of the unlocking hole 119, such as... Figure 3c and Figure 3d As shown. After setting the crease groove 140, the thickness or width of the lower housing 111b at the position of the crease groove 140 (e.g.) Figure 3c and Figure 3d As indicated by the middle arrow, the lower housing 111b is thinned so that when the user presses the pressing part 118, it can be easily broken at the crease groove 140, thus more smoothly releasing the obstruction of the blocking block 117 on the control structure 100.

[0098] Preferably, in this embodiment of the invention, the crease grooves 140 are disposed at both ends of the blocking block 117, such as... Figure 3c As shown. In another embodiment of the invention, the crease groove 140 is provided on one side of the two corresponding sides of the unlocking hole 119, as shown. Figure 3d As shown.

[0099] The infusion structure 110 of this embodiment of the invention is further provided with an infusion needle unit 121 for infusing drugs subcutaneously. For example... Figure 3e As shown, the infusion needle structure includes an infusion needle 1211 and a base 1212. The infusion needle 1211 is fixedly mounted on the base 1212. The infusion needle 1211 includes a front end 1211a and a subcutaneous end 1211b. Both the front end 1211a and the subcutaneous end 1211b extend out of the base 1212. The front end 1211a is used to communicate with the opening 20 of the drug storage unit 131. The subcutaneous end 1211b is used to insert subcutaneously.

[0100] like Figure 3f As shown, the infusion structure 110 is also provided with a first outlet 31 and a second outlet, namely a drug outlet 132b (e.g., Figure 4bThe cavity 30 (shown) has a first outlet 31 that is sealed and connected to the opening 20 of the drug storage unit 131. Here, "sealed and connected" means that the cavity 30 and the drug storage unit 131 are connected to the first outlet 31 through the opening 20, and that no leakage occurs when the drug flows through this point. The second outlet 132b is sealed by an elastic seal 40. When the tip 1211a of the infusion needle pierces the elastic seal 40, the infusion needle 1211, cavity 30, opening 20, and drug storage unit 131 are connected, allowing the drug to enter the infusion needle 1211 from the drug storage unit 131 and reach the subcutaneous end 1211b or be infused subcutaneously.

[0101] In this embodiment of the invention, the volume of the drug reservoir 131 is 1mL-5mL, preferably 1mL-2mL, depending on the actual needs of the user or patient. If the volume of the drug reservoir 131 is too large, it will affect the volume of the entire infusion structure 110, thereby affecting the user experience. If the volume is too small, it will fail to meet the user's requirements, requiring frequent drug filling and replacement of the infusion structure 110, which will also affect the user experience.

[0102] The bottom of the lower housing 111b of the infusion structure 110 is also provided with an adhesive patch 150 for attaching the infusion device to the user's skin surface.

[0103] The patch-type drug delivery system also includes an injection structure 120. In this embodiment of the invention, the injection structure 120 is a syringe 120, used to draw insulin from a drug storage bottle, such as an insulin vial, and then insert it into a drug inlet 132a (e.g., ...). Figure 4a As shown), vent the air from the drug pipeline and then pour the drug into the storage cylinder 131. Figure 3f As shown, the infusion structure 110 also has a third outlet, namely a drug inlet 132a, which is sealed by an elastic seal 50. In this embodiment of the invention, the elastic seals 40 and 50 can be the same or different; no specific limitation is made here, as long as they can seal. During the drug infusion process, the needle of the syringe 120 pierces the elastic seal 50, connecting the syringe 120, cavity 30, opening 20, and drug reservoir 131. Air in the tubing is drawn into the syringe by the negative pressure generated when the syringe plunger is pulled back, expelling the air from the syringe 120. After this, the drug can be infused from the syringe 120 into the drug reservoir 131. Due to the elastic seal 50, after the syringe 120 draws out the air from the tubing or the drug is infused from the syringe 120 into the drug reservoir 131 and the syringe 120 is pulled out, the drug inlet 132a can automatically seal, preventing the drug from leaking from the drug reservoir 131 and preventing air from entering.

[0104] In this embodiment of the invention, the volume of the injection structure 120 is intentionally set to be larger than the volume of the drug to be infused. After the injection structure absorbs a predetermined amount of drug, there is still enough space to generate negative pressure, which draws the air in the drug pipeline into the injection structure 120 and then discharges it. Finally, the drug is injected into the drug storage cylinder 131.

[0105] Preferably, the volume of the injection structure 120 is intentionally set to be larger than the volume of the drug reservoir 131. During the drug filling process, the maximum amount of drug, i.e., the maximum volume of drug in the drug reservoir 131, can be filled in while venting air. This increases the drug's usage time, reduces the frequency of drug infusion system replacement, improves user experience, and improves the accuracy of the actual volume of drug filled into the drug reservoir, thereby providing accurate drug infusion.

[0106] Preferably, in this embodiment of the invention, the volume of the injection structure 120 is 1 mL-2 mL larger than the volume of the drug reservoir 131. For example, when the volume of the drug reservoir 131 is 1 mL, the volume of the injection structure 120 can be 2 mL-3 mL; when the volume of the drug reservoir 131 is 2 mL, the volume of the injection structure 120 can be 3 mL-4 mL; and when the volume of the drug reservoir 131 is 5 mL, the volume of the injection structure 120 can be 6 mL-7 mL. The specific volumes of the injection structure 120 and the drug reservoir 131 are not specifically limited here. In another embodiment of the invention, the volume of the injection structure 120 is at least 20% larger than the volume of the drug reservoir 131, and can be 30%, 50%, or 100%, which is not specifically limited here.

[0107] Figures 4a-4b These are two perspective three-dimensional structural schematic diagrams of the internal structure 130 of the infusion structure 110 in an embodiment of the present invention.

[0108] In this embodiment of the invention, the internal structure 130 includes mechanical units and electrical control units for performing the infusion function, such as a drug reservoir 131, a drug inlet 132a, a drug outlet 132b, a power supply 133, a drive wheel 134, a screw 135, a circuit board 107, and a drive unit (not shown). The movement of the drive unit drives the drive wheel 134 to rotate, which in turn drives the screw 135 to push the piston (not shown) in the drug reservoir 131 to move, thereby realizing drug infusion.

[0109] In this embodiment of the invention, the power supply 133 is a conventional button cell battery. In other embodiments of the invention, the power supply 133 can also be other types of batteries, as long as they can meet the requirements of supplying power to the infusion device. Preferably, in this embodiment of the invention, the power supply 133 is a dual-row battery, that is, two rows of batteries are respectively arranged on both sides of the drive wheel 134, such as... Figure 4bAs shown. Conventionally, button cells have low discharge capacity. Using a dual-row design reduces the discharge level of each cell, extending battery life. Furthermore, the dual-row design of the power supply 133 fully utilizes the internal space of the infusion device, improving the integration of the internal structure.

[0110] In this embodiment of the invention, the infusion structure 110 also includes a circuit board or a three-dimensional circuit coated on a portion of the structural surface for supplying power to specific structural units. The circuit board can be a rigid circuit board or a flexible circuit board. Preferably, in this embodiment of the invention, the circuit board is a flexible circuit board. The flexible circuit board is malleable and its shape can be flexibly designed according to the internal space of the infusion structure 110. Simultaneously, multiple connection terminals can be provided on the flexible circuit board to be electrically connected to different second electrical contacts 113, thereby connecting the control structure 100 and the infusion structure 110, enabling the infusion device to perform its normal infusion function.

[0111] The infusion structure 130 also contains an elastic conductor 136. The elastic conductor 136 is electrically connected to the power supply 133 and specific connection terminals on the circuit board (or three-dimensional circuit), thereby enabling power supply to specific structural units.

[0112] Similar to elastic conductors, the type of elastic conductor 136 includes conductive springs, conductive sheets, conductive rubber, or conductive silicone, etc., and there are no specific limitations here, as long as it can meet the condition of electrically connecting the power supply 133 to a specific connection terminal on the circuit board (or three-dimensional circuit). Preferably, in this embodiment of the invention, the elastic conductor 136 is a conductive sheet. Obviously, since the delivery structure 110 has a dual-row battery, the elastic conductor 136 is also designed as a dual-row structure, such as... Figure 4a As shown.

[0113] The elastic conductor 136 enables direct electrical connection between the power supply 133 and a specific structural unit, reducing the need for internal wiring design and lowering the complexity of the internal structure.

[0114] Figure 5 This is a flowchart of a method for administering medication in one embodiment of the present invention.

[0115] In this embodiment of the invention, the drug infusion method applied to the patch-type drug infusion system is mainly used to draw the drug to be infused, such as insulin, from the storage bottle and fill it into the storage cylinder 131 of the infusion structure 110. The drug infusion method may include:

[0116] Step S410: The drug to be infused is drawn into the injection structure 120, wherein the volume of the injection structure 120 is intentionally set to be larger than the volume of the drug to be infused.

[0117] Step S420: Insert the injection structure 120 into the drug inlet 132a of the infusion structure 110 and extract the air from the drug tubing of the infusion structure 110.

[0118] Step S430: Remove the injection structure 120 and vent air;

[0119] In step S440, the injection structure 120 is inserted again into the drug inlet 132a of the infusion structure 120 and poured into the drug reservoir 131.

[0120] In this way, the volume of the injection structure 120 is deliberately set to be larger than the volume of the drug to be infused. The negative pressure generated by the extra space of the injection structure 120 can be used to expel the air in the drug pipeline of the infusion structure 110 before the drug to be infused is poured into the drug reservoir 131, thereby reducing the risk of air being injected into the body, reducing safety hazards, and improving the user experience.

[0121] Specifically, in this embodiment of the invention, the injection structure 120 is a syringe 120. In step S410, the push rod of the syringe 120 is pulled to draw a certain amount of air into the syringe and inject it into the drug storage bottle so that the positive pressure generated causes the drug to be infused to be drawn into the syringe 120. Since the volume of the injection structure 120 is designed to be larger than the volume of the drug to be infused, the drug does not fill the syringe at this time, and there is always extra space in the syringe 120.

[0122] In step S420, the syringe needle is inserted vertically into the drug inlet 132a of the infusion structure 110. As previously described, after the syringe needle pierces the elastic seal 50 and is inserted into the drug inlet 132a, the syringe 120, cavity 30, opening 20, and drug reservoir 131 are connected. Pulling the plunger of the syringe 120 to its highest position creates negative pressure due to the unfilled space within the syringe 120. This pressure draws out air from the drug tubing, generating bubbles that rise into the syringe 120. Releasing the plunger causes it to automatically return to its initial position under pressure, but the bubbles are not pushed into the drug reservoir 131.

[0123] In this embodiment of the invention, an air venting step may be included between steps S410 and S420. Specifically, the syringe is lightly tapped to allow air bubbles to rise to the top of the syringe, and the push rod is slowly pushed to expel the air. This air venting process can occur in the drug reservoir or after the syringe 120 is withdrawn from the drug reservoir; it is not limited here.

[0124] In step S430, the needle of syringe 120 is pulled out of the drug inlet 132a of infusion structure 110. At this time, due to the presence of elastic seal 50, the drug inlet 132a will automatically seal after the needle is pulled out. The syringe is then gently tapped again to allow air bubbles to rise to the top of the syringe, and the push rod is slowly pushed to expel the air.

[0125] In step S440, the injection structure 120 is inserted into the drug inlet 132a of the infusion structure 110 again and the push rod is slowly pushed to allow the drug to be poured into the drug reservoir 131. The syringe 120 is then pulled out, and the drug inlet 132a is automatically sealed by the elastic seal 50, thus completing the drug filling.

[0126] In this embodiment of the invention, the volume of the injection structure 120 is intentionally set to be larger than the volume of the drug reservoir 131. After the injection structure 120 draws in a predetermined amount of drug, such as the maximum volume of the drug reservoir 131, there is still enough space to generate negative pressure, drawing air from the drug tubing into the injection structure 120 and then expelling it. Finally, the drug is injected into the drug reservoir 131, filling it completely. This increases the drug's usage time, reduces the frequency of drug infusion system replacement, improves user experience, and simultaneously improves the accuracy of the actual volume of drug injected into the drug reservoir, thereby providing accurate drug infusion.

[0127] Preferably, in this embodiment of the invention, the volume of the injection structure is 1-2 mL larger than the volume of the drug reservoir 131. For example, when the volume of the drug reservoir 131 is 1 mL, the volume of the injection structure can be 2-3 mL; when the volume of the drug reservoir 131 is 2 mL, the volume of the injection structure can be 3-4 mL; and when the volume of the drug reservoir 131 is 5 mL, the volume of the injection structure can be 6-7 mL. The specific volumes of the injection structure and the drug reservoir 131 are not specifically limited here. In another embodiment of the invention, the volume of the injection structure is at least 20% larger than the volume of the drug reservoir 131, and can be 30%, 50%, or 100%, which is not specifically limited here.

[0128] In this embodiment of the invention, the drug infusion process of the drug infusion system can be performed before or after the infusion structure 110 and the control structure 100 are electrically connected. No specific limitation is made here. Users can operate according to their personal habits and preferences to improve the diversity and convenience of operation.

[0129] Figure 6 This is a flowchart of a method for administering medication in another embodiment of the present invention.

[0130] In this embodiment of the invention, the drug infusion method applied to the patch-type drug infusion system is mainly used to draw the drug to be infused, such as insulin, from the storage bottle and fill it into the storage cylinder 131 of the infusion structure. The drug infusion method may include:

[0131] Step S510: The drug to be infused is drawn from the storage bottle into the injection structure 120;

[0132] Step S520: Insert the injection structure 120 into the drug inlet 132a of the infusion structure and fill it with the drug to be infused;

[0133] Step S530: Pull the push rod of the injection structure to extract the air from the drug tubing of the infusion structure.

[0134] In this way, after the drug is poured into the drug storage cylinder 131, the air in the drug pipeline is extracted and discharged by the injection structure 120, reducing the risk of air being injected into the body and reducing safety hazards.

[0135] Specifically, in this embodiment of the invention, the injection structure is a syringe. In step S510, the syringe plunger is pulled to draw a certain amount of air into the syringe and inject it into the drug storage bottle so that the positive pressure generated causes the drug to be infused to be drawn into the syringe.

[0136] In step S520, the syringe needle is inserted vertically into the drug inlet 132a of the infusion structure 110, and the push rod is slowly pushed to allow the drug to be poured into the drug reservoir 131.

[0137] In this embodiment of the invention, an air venting step may be included between steps S410 and S420. Specifically, the syringe is lightly tapped to allow air bubbles to rise to the top of the syringe, and the push rod is slowly pushed to expel the air. This air venting process can occur in the drug reservoir or after the syringe 120 is withdrawn from the drug reservoir; it is not limited here.

[0138] In step S530, the push rod of the injection structure 120 is pulled to extract the air from the drug tubing of the infusion structure 110, and the syringe 120 is pulled out. At this time, the air in the drug tubing is expelled, reducing the risk of air being injected into the body, reducing safety hazards, and improving user experience.

[0139] In this embodiment of the invention, the drug infusion process of the drug infusion system can be performed before or after the infusion structure 110 and the control structure 120 are electrically connected. No specific limitation is made here. Users can operate according to their personal habits and preferences to improve the diversity and convenience of operation.

[0140] In summary, this invention discloses a patch-type drug infusion system and a method for administering the drug to the patch-type drug infusion system. Because the volume of the injection structure is intentionally set to be larger than the volume of the drug to be infused, negative pressure can be generated using the extra space in the injection structure during the infusion process to extract air from the drug tubing, reducing the risk of air being injected into the body, minimizing safety hazards, and improving the user experience. This invention also discloses another method for administering the drug to the patch-type drug infusion system, in which, after the drug is injected into the reservoir, the injection structure is used to extract air from the drug tubing, further reducing the risk of air being injected into the body and minimizing safety hazards.

[0141] While specific embodiments of the invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. A patch-type drug infusion system, characterized in that, include: Infusion structure, the infusion structure comprising: A drug storage container is used to hold drugs to be infused, and it is equipped with a drug inlet and a drug outlet. An infusion needle, one end of which is connected to the drug outlet of the drug reservoir, and the other end is inserted subcutaneously to achieve drug infusion; A control structure connected to the infusion structure to control drug infusion; An adhesive patch that can adhere the infusion structure and / or the control structure to the skin surface; and The injection structure injects the drug to be infused into the drug reservoir through the drug inlet. The volume of the injection structure is intentionally set to be larger than the volume of the drug to be infused, so that after the injection structure absorbs a predetermined amount of drug, there is still enough space to generate negative pressure. The extra space in the injection structure is used to generate negative pressure to extract air from the drug pipeline. During the infusion process, the drug to be infused is drawn from the drug reservoir into the injection structure, the injection structure is inserted into the drug inlet of the infusion structure, and the negative pressure generated by the extra space in the injection structure is used to draw air from the drug tubing of the infusion structure into the injection structure. The injection structure is then pulled out and the air is vented. The injection structure is then inserted back into the drug inlet of the infusion structure and the drug is infused into the drug reservoir of the infusion structure.

2. The patch-type drug infusion system according to claim 1, characterized in that, The volume of the injection structure is intentionally set to be larger than the volume of the drug reservoir.

3. The patch-type drug infusion system according to claim 2, characterized in that, The volume of the injection structure is 1 mL to 2 mL larger than the volume of the drug reservoir.

4. The drug infusion system according to claim 3, characterized in that, The volume of the medicine storage cylinder is 1-5 mL.

5. The drug infusion system according to claim 4, characterized in that, The volume of the medicine storage cylinder is 1-2 mL.

6. The patch-type drug infusion system according to claim 2, characterized in that, The volume of the injection structure is at least 20% larger than the volume of the drug reservoir.

7. The drug infusion system according to any one of claims 1-6, characterized in that, The drug inlet also includes an elastic seal that can automatically seal the drug inlet to prevent drug leakage after the drug is poured into the drug storage cylinder.

8. The patch-type drug infusion system according to claim 1, characterized in that, The control structure and the infusion structure are separate structures, and the control structure can be reused.

9. The patch-type drug infusion system according to claim 1, characterized in that, The control structure and the infusion structure are an integrated structure, which is discarded after single use.

10. The patch-type drug infusion system according to claim 8, characterized in that, The control structure is provided with a plurality of first electrical contacts exposed on its surface, and the infusion structure is provided with second electrical contacts corresponding to the first electrical contacts. The first electrical contacts and the second electrical contacts press against each other, thereby electrically connecting the control structure and the infusion structure.

11. The patch-type drug infusion system according to claim 10, characterized in that, The first electrical contact or the second electrical contact is a rigid metal contact or an elastic conductive element.

12. The patch-type drug infusion system according to claim 11, characterized in that, It also includes a buzzer, which is set within the control structure in a non-enclosed manner.

13. The patch-type drug infusion system according to claim 12, characterized in that, The infusion structure also contains a flexible circuit board.

14. The patch-type drug infusion system according to claim 13, characterized in that, The infusion structure also includes a housing, which comprises an upper housing and a lower housing. The lower housing includes an outward extension, and a blocking block is provided on the outer side of the extension.

15. A method for administering medication into a patch-type drug infusion system, used to infuse the drug to be infused into the infusion structure, characterized in that, The patch-type drug infusion system applied to any one of claims 1 to 14, wherein the drug infusion method comprises: Step 1: The drug to be infused is drawn from the storage bottle into the injection structure of the infusion structure. The volume of the injection structure is intentionally set to be larger than the volume of the drug to be infused, so that after the injection structure absorbs a predetermined amount of drug, there is still enough space to generate negative pressure. Step 2: Insert the injection structure into the drug inlet of the infusion structure, and use the negative pressure generated by the extra space in the injection structure to draw the air in the drug tubing of the infusion structure into the injection structure; Step 3: Remove the injection structure and vent air; Step 4: Insert the injection structure back into the drug inlet of the infusion structure and pour the drug into the drug reservoir of the infusion structure.

16. The method for administering medication using the drug infusion system according to claim 15, characterized in that, An exhaust step is also included between step one and step two.

17. The method for administering medication using the drug infusion system according to claim 16, characterized in that, The venting step occurs in the reservoir or after the injection structure is removed from the reservoir.

18. The method for administering medication using the drug infusion system according to claim 15, characterized in that, The volume of the injection structure is intentionally set to be larger than the volume of the drug reservoir.

19. The method for administering medication using the drug infusion system according to claim 18, characterized in that, The infusion structure and control structure are electrically connected before or after the drug delivery process.

20. A method for administering medication into a patch-type drug infusion system, used to infuse the drug to be infused into the infusion structure, characterized in that, The patch-type drug infusion system applied to any one of claims 1 to 14, wherein the drug infusion method comprises: Step 1: The drug to be infused is drawn from the storage bottle into the injection structure. The volume of the injection structure is intentionally set to be larger than the volume of the drug to be infused, so that after the injection structure draws in a predetermined amount of drug, there is still enough space to generate negative pressure. Step 2: Insert the injection structure into the drug inlet of the infusion structure and fill it with the drug to be infused; Step 3: Pull the push rod of the injection structure to use the negative pressure generated by the extra space in the injection structure to extract the air from the drug tubing of the infusion structure.

21. The method for administering medication to the drug infusion system according to claim 20, characterized in that, An exhaust step is also included between step one and step two.

22. The method for administering medication to the drug infusion system according to claim 21, characterized in that, The venting step occurs in the reservoir or after the injection structure is removed from the reservoir.

23. The method for administering medication using the drug infusion system according to claim 20, characterized in that, The infusion structure and control structure are electrically connected before or after the drug delivery process.

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