Patch-type drug infusion device

Abstract

This invention discloses a patch-type drug infusion device, comprising: an infusion structure, which includes an infusion module and a circuit module; the circuit module includes: a circuit board or a three-dimensional circuit coated on a portion of the structure surface for supplying power to specific structural units; a drive unit for driving a drive wheel of the infusion structure to infuse drug; a conductive spring, including a small-diameter middle portion and large-diameter end portions in the axial direction, for fixing the drive unit and electrically connecting the drive unit to specific connection terminals on the circuit board or three-dimensional circuit; a control structure electrically connected to the infusion structure; and an adhesive patch for attaching the control structure and the infusion structure to the skin surface. The conductive spring's small middle portion and large end portions improve the stability of the drive unit and the high reliability of the electrical connection between the drive unit and the specific connection terminals on the circuit board or three-dimensional circuit.

Description

[0001] Cross-reference to related applications

[0002] This application claims the benefit of and priority of the following patent application: PCT patent application filed on January 5, 2021, application number PCT / CN2021 / 070207. Technical Field

[0003] This invention relates primarily to the field of medical devices, and in particular to a patch-type drug infusion device. Background Technology

[0004] 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 needed. Therefore, diabetes is a metabolic disease caused by abnormal pancreatic function and is a lifelong condition. Currently, medical technology cannot cure diabetes; it can only control the occurrence and development of diabetes and its complications by stabilizing blood sugar levels.

[0005] Diabetic patients need to have their blood glucose levels checked before insulin injection. Most current 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 placed on 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 device delivers the required amount of insulin subcutaneously, thus forming a closed-loop or semi-closed-loop artificial pancreas.

[0006] However, the drive unit structure of current drug infusion devices is not stable enough and may rotate due to accidental contact, affecting the accuracy of infusion. At the same time, the reliability of the electrical connection between the drive unit and specific connection terminals on the circuit board or three-dimensional circuit is poor, affecting the normal use of the infusion device.

[0007] Therefore, there is an urgent need in the existing technology for a drug infusion device with high stability of the drive unit and high reliability of the electrical connection between the drive unit and specific connection terminals on the circuit board or three-dimensional circuit. Summary of the Invention

[0008] This invention discloses a patch-type drug infusion device. The conductive tower spring of the infusion structure has a small diameter in the middle part and a large diameter at both ends in the axial direction. It is used to fix the drive unit and prevent the drive unit from rotating due to accidental contact, which would affect the accuracy of the infusion. At the same time, it electrically connects the drive unit and a specific connection terminal on the circuit board or three-dimensional circuit. When the conductive tower spring is compressed, multiple turns of spring at both ends are connected to the specific connection terminal on the drive unit and the circuit board or three-dimensional circuit, which can enhance the stability of the electrical connection between the conductive tower spring and the drive unit and the specific connection terminal on the circuit board or three-dimensional circuit, and improve the reliability of the electrical connection.

[0009] This invention discloses a patch-type drug infusion device, comprising: an infusion structure, the infusion structure including an infusion module and a circuit module, the circuit module including: a circuit board or a three-dimensional circuit coated on a portion of the structure surface, for supplying power to specific structural units; a drive unit for driving the drive wheel of the infusion structure to infuse drugs; a conductive tower spring including a middle portion with a small diameter and two end portions with a large diameter in the axial direction, for fixing the drive unit and electrically connecting the drive unit to specific connection terminals on the circuit board or three-dimensional circuit; a control structure electrically connected to the infusion structure; and an adhesive patch for attaching the control structure and the infusion structure to the skin surface.

[0010] According to one aspect of the invention, the infusion structure further includes a main frame for supporting the components of the infusion structure, and a rotating shaft is also provided on the main frame, with the drive unit sleeved on the rotating shaft and rotating around the rotating shaft.

[0011] According to one aspect of the invention, the diameter of the middle portion of the conductive tower spring remains constant, while the diameters of the two end portions gradually increase in a trumpet shape.

[0012] According to one aspect of the invention, the middle portion of the conductive tower spring is interference-fitted with the rotating shaft.

[0013] According to one aspect of the invention, the two ends of the conductive tower spring have a symmetrical structure.

[0014] According to one aspect of the invention, when the conductive tower spring is compressed, each of the two ends of the conductive tower spring has multiple turns of spring that make contact with a specific connection end on the drive unit and the circuit board or three-dimensional circuit.

[0015] According to one aspect of the invention, the driving unit includes a driving end, which may be one or two.

[0016] According to one aspect of the invention, the circuit board is a flexible circuit board.

[0017] According to one aspect of the invention, the infusion structure further includes a power source and a resilient conductive element with protrusions for electrically connecting the power source to specific connection terminals on a circuit board or three-dimensional circuit.

[0018] According to one aspect of the present invention, the elastic conductor includes one or more of a conductive spring, a conductive sheet, conductive rubber, or conductive silicone.

[0019] According to one aspect of the invention, the power supply has a dual-row structure.

[0020] According to one aspect of the invention, the control structure and the infusion structure are separate structures, and the control unit can be reused.

[0021] According to one aspect of the invention, the control structure and the infusion structure are an integrated structure, which is discarded as a whole after use.

[0022] According to one aspect of the present invention, a control structure is provided with a plurality of first electrical contacts exposed on the surface of the control structure, and an infusion structure is provided with a plurality of second electrical contacts electrically connected to the first electrical contacts.

[0023] 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.

[0024] According to one aspect of the invention, the infusion structure further includes a housing, on which an outward extension is provided, and a blocking block is provided on the outer side of the extension.

[0025] According to one aspect of the invention, the adhesive patch includes an adhesive tape and a protective film, a first side of the adhesive tape being fixedly connected to an infusion device, and a second side opposite to the first side of the adhesive tape being coated with an adhesive material; the protective film is fixedly surrounding the outer edge of the first side of the adhesive tape, the outer edge contour of the protective film conforming to the outer edge contour of the adhesive tape, and the Rockwell hardness of the protective film being higher than that of the adhesive tape.

[0026] Compared with the prior art, the technical solution of the present invention has the following advantages:

[0027] The conductive tower spring in the infusion structure of the patch-type drug infusion device disclosed in this invention has a small diameter in the middle part and a large diameter at both ends in the axial direction. It is used to fix the drive unit and prevent the drive unit from rotating due to accidental contact, which would affect the accuracy of infusion. At the same time, it electrically connects the drive unit and a specific connection end on the circuit board or three-dimensional circuit. When the conductive tower spring is compressed, multiple turns of spring at both ends are connected to the specific connection end on the drive unit and the circuit board or three-dimensional circuit, which can enhance the stability of the electrical connection between the conductive spring and the specific connection end on the drive unit and the circuit board or three-dimensional circuit, and improve the reliability of the electrical connection.

[0028] Furthermore, the diameter of the middle part of the conductive tower spring remains unchanged, and it is interference-fitted with the rotating shaft to further fix the drive unit and improve the stability of the drive unit.

[0029] Furthermore, the two ends of the conductive tower spring are symmetrically arranged, allowing for free assembly and avoiding assembly errors.

[0030] Furthermore, the infusion structure also includes a power source and a flexible conductive element with protrusions for electrically connecting the power source to specific connection terminals on the circuit board or three-dimensional circuit, thereby further improving the electrical connection reliability of the infusion device.

[0031] Furthermore, the power supply is configured with a dual-row structure. This dual-row power supply configuration fully utilizes the internal space of the infusion structure, improving the integration of the infusion device's internal structure.

[0032] Furthermore, a flexible circuit board is also installed within the infusion structure. The flexible circuit board can be flexibly shaped according to the internal characteristics of the infusion structure, thus optimizing the internal design of the infusion structure.

[0033] Furthermore, the control structure is equipped with a first electrical contact, and the infusion structure is equipped with a corresponding second electrical contact. The contact area of ​​the electrical contacts is small, allowing for flexible design and effectively reducing the volume of the control and infusion structures. Attached Figure Description

[0034] Figures 1a-1b These are top views of drug infusion systems according to two different embodiments of the present invention;

[0035] Figures 2a-2b This is a three-dimensional structural diagram of a control structure according to an embodiment of the present invention;

[0036] Figure 3a This is a three-dimensional structural diagram of an infusion structure according to an embodiment of the present invention;

[0037] 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;

[0038] Figure 3c This is a top view of the lower housing of the infusion structure according to an embodiment of the present invention;

[0039] Figure 3d This is a top view of the lower housing of the infusion structure according to another embodiment of the present invention;

[0040] Figures 4a-4b These are two perspective views illustrating the internal structure of an infusion structure according to an embodiment of the present invention.

[0041] Figure 4c This is a three-dimensional structural diagram of the internal structure of the infusion structure according to another embodiment of the present invention;

[0042] Figure 5 This is a three-dimensional structural diagram of an elastic conductor according to an embodiment of the present invention;

[0043] Figure 6A three-dimensional structural schematic diagram of a conductive spring according to an embodiment of the present invention;

[0044] Figure 7 for Figure 4a A magnified view of a portion of the image;

[0045] Figure 8a and Figure 8b These are schematic diagrams of the drive wheel assembly and the main frame 17 before and after assembly, respectively, according to an embodiment of the present invention.

[0046] Figure 8c This is a three-dimensional structural diagram of the cover according to an embodiment of the present invention;

[0047] Figures 9a-9d These are cross-sectional and three-dimensional structural schematic diagrams of the movable block in the open and closed states according to an embodiment of the present invention.

[0048] Figures 10a-10c This is a schematic diagram of the structure of an adhesive patch according to an embodiment of the present invention, including schematic diagrams of the structure of each layer and the stacking order.

[0049] Figure 11a and Figure 11b A three-dimensional structural schematic diagram of the control structure and infusion structure according to another embodiment of the present invention;

[0050] Figure 12a This is a schematic diagram of an in-situ detection module including a piezoresistive device according to another embodiment of the present invention;

[0051] Figure 12b This is a schematic diagram of an in-situ detection module including a magnetic component, according to another embodiment of the present invention;

[0052] Figure 12c This is a schematic diagram of an in-situ detection module including an inductor coil, according to another embodiment of the present invention;

[0053] Figure 12d This is a schematic diagram of another embodiment of the present invention, showing the in-situ detection module including the lower electrode of a capacitor;

[0054] Figure 13 This is a schematic diagram of the threshold range for normal in-situ signals;

[0055] Figure 14 This is a schematic diagram of the internal structure of an infusion structure containing a blockage detection module according to an embodiment of the present invention;

[0056] Figure 15a An exploded view of an infusion structure according to an embodiment of the present invention;

[0057] Figure 15b This is a schematic diagram of the main frame structure according to an embodiment of the present invention;

[0058] Figure 15c This is a schematic diagram of the structure of the lower housing according to an embodiment of the present invention. Detailed Implementation

[0059] As mentioned above, the drive unit structure of the existing infusion device is not stable enough and may rotate due to accidental contact, affecting the accuracy of infusion. At the same time, the reliability of the electrical connection between the drive unit and specific connection terminals on the circuit board or three-dimensional circuit is poor, affecting the normal use of the infusion device.

[0060] Research has revealed that the cause of the above problems is the simple electrical connection structure of the existing drive unit and specific connection terminals on the circuit board or 3D circuit, which affects the reliability of the electrical connection.

[0061] To address this problem, the present invention provides a drug infusion device. The conductive tower spring of the infusion structure has a small diameter in the middle part and a large diameter at both ends in the axial direction. It is used to fix the drive unit and prevent the drive unit from rotating due to accidental contact, which would affect the accuracy of the infusion. At the same time, it electrically connects the drive unit to a specific connection terminal on the circuit board or three-dimensional circuit. When the conductive tower spring is compressed, multiple turns of spring at both ends are connected to the specific connection terminal on the drive unit and the circuit board or three-dimensional circuit, which can enhance the stability of the electrical connection between the conductive spring and the specific connection terminal on the drive unit and the circuit board or three-dimensional circuit, and improve the reliability of the electrical connection.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] Figures 1a-1bThis is a top view of a drug infusion apparatus according to two different embodiments of the present invention.

[0067] The patch-type drug infusion device of this invention comprises two parts: a control structure 100, an infusion structure 110, and an adhesive patch 120. These structures will be described separately below. In other embodiments of this invention, the patch-type drug infusion device may include more parts, and no specific limitations are imposed here.

[0068] A patch-type drug infusion device refers to an infusion device that does not contain a long catheter, and the infusion device is made up of a single adhesive patch 120 that is adhered to the surface of the user's skin. The drug is directly infused from the drug reservoir 131 into the subcutaneous tissue through the infusion needle unit 121 in the device.

[0069] 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 wires, and housed inside the same housing 10. They are attached to a specific location on the user's skin using an adhesive patch 120, and are disposable after single use. Figure 1b As shown.

[0070] This invention relates to a patch-type drug infusion device, which includes a control structure 100. The control structure 100 receives signals or information from a remote device or a body fluid parameter detection device (such as a continuous glucose monitoring device), and then controls the infusion device to complete drug infusion. The housing 101 of the control structure 100 contains a program module, circuit board, and related electronic components for receiving signals or issuing control commands, as well as other physical components or structures necessary for realizing the infusion function, which are not specifically limited here. In some embodiments of this invention, a power supply is also provided in the control structure. In this embodiment, the power supply 133 is located in the infusion structure 110, as described below.

[0071] Figures 2a-2b This is a three-dimensional structural diagram of the control structure 100 according to an embodiment of the present invention.

[0072] The control structure 100 also includes a plurality of first electrical contacts 103 exposed on the surface of the control structure 100. The first electrical contacts 103 serve as circuit connection terminals, used to electrically connect the internal circuits disposed in the control structure 100 and the infusion structure 110 respectively. This embodiment of the invention does not impose specific limitations on the location of the first electrical contacts 103. Compared to connection terminals configured as plug-in connectors, electrical contacts have a smaller contact area, allowing for flexible design and effectively reducing the volume of the control structure. Simultaneously, 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 circuits and effectively reducing circuit complexity, 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. The above-mentioned technical advantages of the electrical contacts apply to 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 below.

[0073] 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 housing 101. The remaining portion of the first electrical contact 103 is tightly embedded in the housing 101 to isolate the interior of the control structure 100 from the outside.

[0074] 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 housing 101, 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.

[0075] 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.

[0076] 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.

[0077] 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 making the first electrical contact 103 and the second electrical contact 113 electrically connected, which will be described in detail below.

[0078] 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.

[0079] 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.

[0080] In this embodiment of the invention, a buzzer (not shown) is also provided within the control structure 100. The buzzer is used to emit sound, vibration, or other alarm signals in situations such as the start or end of infusion, malfunction of the infusion device, depletion of medication, issuance of erroneous commands by the control structure 100, or receipt of erroneous information, so that the user can be aware of the situation and make timely adjustments.

[0081] In this embodiment of the invention, the outer casing 101 of the control structure 100 is provided with a sound-permeable hole 105 to facilitate the transmission of the buzzer's audible alarm signal. To achieve a good sealing effect and ensure the normal operation of the buzzer, a waterproof and sound-permeable membrane (not shown) is provided between the sound-permeable hole 105 and the buzzer. Therefore, the waterproof and sound-permeable membrane needs to have a certain porosity to prevent water molecules from entering the buzzer while ensuring that the sound is transmitted.

[0082] Compared with the traditional technical solution of enclosing the buzzer inside the control structure 100, the sound-transmitting hole 105 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.

[0083] 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.

[0084] The patch-type drug infusion device also includes an infusion structure 110. Its housing contains an infusion module, a circuit module, and other auxiliary modules 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.

[0085] 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.

[0086] In this embodiment of the invention, the infusion structure 110 is provided with a second electrical contact 113. The second electrical contact 113 is used to press against the corresponding first electrical contact 103 to achieve electrical connection between the control structure 100 and the infusion structure 110. The pressing between two electrical contacts of different structures can improve the reliability of the electrical connection. Similar to the first electrical contact 103, the type of the second electrical contact 113 also includes a rigid metal contact or an elastic conductive element. Specifically, in this embodiment of the invention, the second electrical contact 113 is a conductive spring. Similarly, the conductive spring can improve the electrical connection performance. A groove is also provided around the area where the second electrical contact 113 is provided, and a sealing element 115 is provided in the groove.

[0087] 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.

[0088] 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.

[0089] 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.

[0090] 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.

[0091] 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.

[0092] 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.

[0093] 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.

[0094] This embodiment of the invention may also include an unlocking hole 119. The unlocking hole 119 is located inside 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, the unlocking hole 119 is square. The square unlocking hole 119 facilitates easy finger entry. In other embodiments of the invention, the unlocking hole 119 may also be of other shapes, and no specific limitation is made here.

[0095] 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.

[0096] 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.

[0097] The infusion structure 110 of this embodiment of the invention is further provided with an infusion needle unit 121 for infusing drugs subcutaneously.

[0098] The bottom of the lower housing 111b of the infusion structure 110 is also provided with an adhesive patch 120 for attaching the infusion device to the user's skin surface.

[0099] 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. Figure 4c This is a three-dimensional structural diagram of the internal structure 130 of the infusion structure 110 according to another embodiment of the present invention.

[0100] 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 outlet 132, a power supply 133, a drive wheel 134, a screw 135, a circuit board (not shown), and a drive unit 1310. The movement of the drive unit 1310 drives the drive wheel 134 to rotate, which in turn drives the screw 135 to push the piston 312 (e.g., in the drug reservoir 131) in the drug reservoir 131. Figure 14 (As shown) movement to achieve drug infusion.

[0101] 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 4b As 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.

[0102] In this embodiment of the invention, the infusion structure 110 also includes a circuit board or a three-dimensional circuit coated on part of the structural surface for supplying power to specific structural units. Depending on the internal structural characteristics of the infusion device, the shape and position of the three-dimensional circuit can be flexibly designed to fully utilize the internal space of the infusion structure, resulting in a more compact structure. 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 electrically connect with 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.

[0103] 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.

[0104] Figure 5 This is a three-dimensional structural diagram of the elastic conductor 136 according to an embodiment of the present invention.

[0105] In this embodiment of the invention, the elastic conductor 136 includes a first elastic conductive part 136a connected to the power supply 133 and a second elastic conductive part 136b connected to a specific connection end on the circuit board (or three-dimensional circuit). Both the first elastic conductive part 136a and the second elastic conductive part 136b are provided with at least one protrusion 1361 to facilitate point contact or line contact between the first elastic conductive part 136a and the power supply 133, and point contact or line contact between the second elastic conductive part 136b and the specific connection end on the circuit board (or three-dimensional circuit). This improves the reliability of the electrical connection between the elastic conductive part 136 and the power supply 133 and the specific connection end on the circuit board (or three-dimensional circuit). When both the elastic conductive part 136a and the second elastic conductive part 136b are planar, poor contact between the elastic conductor 136 and the power supply 133 and the specific connection end on the circuit board (or three-dimensional circuit) may occur during use, thus affecting the performance. In this embodiment of the invention, the protrusion 1361 may be a line protrusion formed by bending the first elastic conductive part 136a or the second elastic conductive part 136b, or it may be a plurality of point-like or other shaped protrusions formed by processing the first elastic conductive part 136a or the second elastic conductive part 136b by other means. The form and number of the protrusions 1361 on the first elastic conductive part 136a or the second elastic conductive part 136b may be the same or different. Here, the form, number and formation method of the protrusions 1361 are not specifically limited, as long as they can strengthen the point contact connection or line contact connection between the elastic conductor 136 and the power supply 133 and the specific connection end on the circuit board (or three-dimensional circuit) and improve the reliability of the electrical connection.

[0106] In this embodiment of the invention, the first elastic conductive portion 136a and the second elastic conductive portion 136b are approximately L-shaped. The first elastic conductive portion 136a is approximately parallel to the main frame 137, and the second elastic conductive portion 136b is approximately perpendicular to the main frame 137. In other embodiments of the invention, the first elastic conductive portion 136a and the second elastic conductive portion 136b can also be configured in other shapes. No specific limitations are imposed here, as long as the power supply 133 can be electrically connected to a specific connection terminal on the circuit board (or three-dimensional circuit). At the connection point of the first elastic conductive portion 136a and the second elastic conductive portion 136b (e.g., Figure 5 An insulating component 1362 (shown at point L) is also provided to prevent the power component 1311 from contacting the elastic conductor 136 during operation, causing a short circuit and stopping the infusion structure 130 from working. In this embodiment of the invention, the insulating component 1362 is formed by printing ink. In other embodiments of the invention, the insulating component 1362 can also be insulating adhesive, insulating varnish, or other insulating materials, without specific limitations.

[0107] In this embodiment of the invention, the elastic conductor 136 may be a metal sheet comprising a first elastic conductive portion 136a and a second elastic conductive portion 136b, or it may be an integrated unit formed by directly or indirectly connecting the first elastic conductive portion 136a and the second elastic conductive portion 136b through other conductive elements; no limitation is imposed here. When the elastic conductor 136 is a metal sheet comprising the first elastic conductive portion 136a and the second elastic conductive portion 136b, not only is the manufacturing process of the elastic conductor 136 simple, and the connection between the first elastic conductive portion 136a and the second elastic conductive portion 136b is firm, but the volume of the elastic conductor 138 can also be reduced, saving materials and reducing raw material costs and production costs. When the elastic conductor 136 is formed by directly or indirectly connecting the first elastic conductive portion 136a and the second elastic conductive portion 136b through other conductive elements, the elastic conductive portion can be flexibly selected according to the needs of the specific connecting components, optimizing the internal design of the infusion structure.

[0108] In this embodiment of the invention, a positioning post 138 is also provided on the main frame 137, and an opening adapted to the positioning post 138 is provided on the elastic conductor 136. The elastic conductor 136 is sleeved on the positioning post 138 through the opening, so that the elastic conductor 136 is fixed on the main frame 137. At the same time, the positioning post 138 is melted by heat fusion to further fix the elastic conductor 136, preventing the elastic conductor 136 from shaking due to long-term use or other reasons, which could cause poor connection between the elastic conductor 136 and the power supply 133 or the specific connection terminal on the circuit board (or three-dimensional circuit), thus affecting its use.

[0109] In this embodiment of the invention, a boss 139 is also provided on the main frame 137. The boss 139 is located below the first elastic conductive part 136a to prevent the protrusion 1361 of the first elastic conductive part 136a from being flattened or deformed during long-term use, which would lead to poor connection between the first elastic conductive part 136a and a specific connection terminal on the circuit board (or three-dimensional circuit) and cause a malfunction. Preferably, the position of the boss 139 is offset from the projection position of the protrusion 1361 on the main frame 137 and is close to the positioning post 138. On the one hand, this can prevent hard contact or solid pressure between the first elastic conductive part 136a and the specific connection terminal on the circuit board (or three-dimensional circuit) from damaging the circuit board, and on the other hand, it can ensure the elastic electrical contact between the first elastic conductive part 136a and the specific connection terminal on the circuit board (or three-dimensional circuit).

[0110] 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.

[0111] 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.

[0112] like Figure 4a As shown, the infusion structure 110 also includes a drive unit 1310 and a power component 1311, which are mounted on the main frame 137. The main frame 137 also has a rotating shaft 1313. The drive unit 1310 has a through hole, through which it is fixed to the rotating shaft 1313. The drive unit 1310 includes a drive end 1312. One end of the power component 1311 is connected to the drive unit 1310, and the other end is connected via a conductive platform 1314 to a specific electrical connection terminal on a circuit board or three-dimensional circuit, further enabling connection to the control module within the control structure 100. The control module within the control structure 100 applies power to the power component 1311, causing the drive unit 1310 to rotate around the rotating shaft 1313, driving the drive end 1312 forward to advance the teeth of the drive wheel 134, thus enabling the infusion device to infuse the drug. In this embodiment of the invention, there are two drive ends 1312 and two corresponding power components 1311. In another embodiment of the present invention, there is one drive end 1312 and one power component 1311, such as Figure 4c As shown.

[0113] The infusion structure 110 is also equipped with a conductive tower spring 1315, which is sleeved on the rotating shaft 1313. One end abuts against the drive unit 1310, and the other end is electrically connected to a specific electrical connection terminal on the circuit board or three-dimensional circuit. It is used to fix the drive unit 1310 and at the same time realize the electrical connection between the drive unit 1310 and the specific electrical connection terminal on the circuit board or three-dimensional circuit.

[0114] Figure 6 A three-dimensional structural schematic diagram of the conductive tower spring 1315 according to an embodiment of the present invention.

[0115] In this embodiment of the invention, the conductive tower spring 1315 includes a portion A with a small central diameter and portions B and C with large diameters at both ends in the axial direction. The diameter of portion A is the same, and it fixes the rotating shaft 1313 by interference fit, further fixing the drive unit 1310. At the same time, portion B abuts against the drive unit 1310 to prevent the drive unit 1310 from shaking due to unstable fixation when it is accidentally touched, which would cause the drive end 1312 to push the drive wheel 134 forward and affect the accuracy of infusion. The diameters of portions B and C gradually expand in a trumpet shape towards both ends. When portions B and C are electrically connected to the drive unit 1310 and specific electrical connection terminals on the circuit board or three-dimensional circuit, respectively, the conductive tower spring 1315 is compressed. Therefore, portions B and C have multiple turns, with at least 2-3 turns of spring simultaneously contacting the drive unit 1310 and specific electrical connection terminals on the circuit board or three-dimensional circuit, improving the electrical connection reliability of the infusion device.

[0116] Preferably, in this embodiment of the invention, the B and C parts of the conductive tower spring 1315 are symmetrical structures, and the two ends can be assembled arbitrarily to avoid assembly misalignment.

[0117] Figure 7 for Figure 4a A magnified view of a portion of the image.

[0118] In this embodiment of the invention, at least one conductive platform 1314 is provided inside the infusion structure 110. Specifically, when the drive unit 1310 includes two drive arms 1312, there are two corresponding power components 1311 and conductive platforms 1314. Figure 4a As shown; when the drive unit 1310 includes one driver 1312, there is one corresponding power component 1311 and one conductive platform, as shown. Figure 4c As shown. The conductive platform 1314 is electrically connected to the power component 1311 and specific connection terminals on the circuit board or three-dimensional circuit.

[0119] The conductive platform 1314 includes a conductive platform body 141 and a conductive arm 142. The conductive arm 142 is an elastic conductive element, and at least one conductive platform protrusion 1421 is provided on the conductive arm 142 to facilitate point contact or line contact with a specific connection terminal on the circuit board (or three-dimensional circuit), thereby improving the reliability of the electrical connection between the conductive platform 1314 and the specific connection terminal on the circuit board (or three-dimensional circuit). When the conductive arm of the conductive platform 1314 is a planar structure, poor contact between the conductive platform 1314 and the specific connection terminal on the circuit board (or three-dimensional circuit) may occur during use, thus affecting the performance. In this embodiment of the invention, the conductive platform protrusion 1421 can be a line protrusion formed by bending the conductive arm 142, or it can be multiple point-like or other shaped protrusions formed by processing the conductive arm 142 by other means. Here, the form, number, and formation method of the conductive platform protrusion 1421 are not specifically limited, as long as they can enhance the reliability of the electrical connection between the conductive platform 1314 and the specific connection terminal on the circuit board (or three-dimensional circuit). In this embodiment of the invention, the conductive stage body 141 further includes a conductive stage body end 1411. The power component 1311 is an electrically driven linear actuator or an electrically heated linear actuator, such as a shape memory alloy, and is connected to the conductive stage body 141 by die casting, resulting in a stable connection and high electrical connection reliability. Specifically, the power component 1311 is placed into the folded conductive stage body end 1411 and then connected to the conductive stage body end 1411 by die casting, further enhancing the high electrical connection reliability.

[0120] In this embodiment of the invention, the conductive platform 1314 can be a metal sheet comprising a conductive platform body 141 and a conductive arm 142, or it can be an integrated structure formed by directly or indirectly electrically connecting the conductive platform body 141 and the conductive arm 142 through other conductive elements; no limitation is made here. When the conductive platform 1314 is a metal sheet comprising a conductive platform body 141 and a conductive arm 142, not only is the manufacturing process of the conductive platform 1314 simple, and the connection between the conductive platform body 141 and the conductive arm 142 is firm, but the volume of the conductive platform 1314 can also be reduced, saving materials and reducing raw material costs and production costs. When the conductive platform 1314 is formed by directly or indirectly electrically connecting the conductive platform body 141 and the conductive arm 142 through other conductive elements, the elastic conductive part can be flexibly selected according to the requirements of the specific connecting components, optimizing the internal design of the infusion structure.

[0121] Similarly, the conductive platform body 141 and the conductive platform body end 1411 can also be metal sheets, or be integrated directly or indirectly through electrical connection with other conductive elements, without limitation. The conductive platform 1314 can be a metal sheet including the conductive platform body 141, the conductive arm 142, and the conductive platform body end 1411, or two of them can be metal sheets integrated with a third party directly or indirectly through other conductive elements, or all three can be integrated directly or indirectly through other conductive elements, without specific limitation. The advantages of various molding methods have been described above and will not be repeated here. Preferably, in the embodiment of the present invention, the conductive platform body 141, the conductive arm 142, and the conductive platform body end 1411 are integrally molded.

[0122] In this embodiment of the invention, the main frame 137 is provided with a plurality of stops 1316 for accommodating and defining the position of the conductive platform 1314. The main frame 137 is also provided with a conductive platform positioning post 1317. The conductive platform 1314 is provided with an opening adapted to the conductive platform positioning post 1317. The conductive platform 1314 is fitted onto the conductive platform positioning post 1317 through the opening, so that the conductive platform 1314 is fixed on the main frame 137. At the same time, the conductive platform positioning post 1317 is melted by heat fusion to further fix the conductive platform 1314 and prevent the conductive platform 1314 from shaking due to long-term use or other reasons, which would cause poor contact between the conductive platform 1314 and the specific connection terminal on the circuit board (or three-dimensional circuit) and affect its use.

[0123] In this embodiment of the invention, a conductive platform protrusion (not shown in the figure) is also provided on the main frame 137. The conductive platform protrusion is located below the conductive arm 142 to prevent the conductive platform protrusion 1421 of the conductive arm 142 from being flattened or deformed during long-term use, which would lead to poor contact between the conductive platform 141 and a specific connection end on the circuit board (or three-dimensional circuit) and cause a malfunction. Preferably, the conductive platform protrusion is positioned off-center from the projection position of the conductive platform protrusion 1421 on the main frame 137 and closer to the conductive platform positioning post 1317. This can prevent hard contact or solid pressure between the conductive arm 142 and the specific connection end on the circuit board (or three-dimensional circuit) from damaging the circuit board, and ensure elastic electrical contact between the conductive arm 142 and the specific connection end on the circuit board (or three-dimensional circuit).

[0124] Similar to the elastic conductor 136, the conductive platform 1314 can be of the type of conductive spring, conductive sheet, conductive rubber or conductive silicone, etc. There are no specific restrictions here, as long as it can meet the condition of electrically connecting the power component 1310 to a specific connection terminal on the circuit board (or three-dimensional circuit).

[0125] Figure 8a and Figure 8bThese are schematic diagrams of the drive wheel assembly and the main frame 17 before and after assembly, respectively, according to an embodiment of the present invention. Figure 8c This is a three-dimensional structural diagram of the cover according to an embodiment of the present invention.

[0126] The drive wheel assembly includes a drive wheel body 16 and a movable block 18. The drive wheel body 16 includes a drive wheel 161, a drive tube 162 with internal threads for accommodating a screw 135, and a connector 163 located at the end of the drive wheel 161. The connector 163 has a connecting portion 1631 for operably connecting to the movable block 18. The movable block 18 has internal threads for accommodating the screw 135 and also has a movable block connecting rod 181 movably connected to the connecting portion 1631. After the connecting rod 181 is movably connected to the connecting portion 1631, the movable block 18 can rotate around the connecting rod 181, thereby opening or closing the movable block 18. When the movable block 18 is open, the screw 135 can slide towards the drive wheel body 16; when the movable block 18 is closed, the screw 135 cannot slide towards the drive wheel body 16, as will be described in detail below.

[0127] The drive wheel assembly also includes a cover 15, which has multiple cover engaging portions 151 for engaging with the main frame 17. The main frame 17 has a main frame groove 171 for accommodating the drive wheel body 16, and also has multiple main frame engaging portions 172 that engage with the cover engaging portions 151. After the drive wheel body 16 and the movable block 18 are connected and placed into the main frame groove 171, the cover 15 is then assembled onto the main frame 17. Through the engagement of the main frame engaging portions 173 and the cover engaging portions 151, the drive wheel body 16 and the movable block 18 can be fixed in the main frame 17, preventing the drive wheel body 16 from shaking and affecting the accuracy of drug infusion.

[0128] The main frame engaging portion 172 and the cover engaging portion 151 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 main frame 17 and the cover 15, and are not specifically limited here. Preferably, the main body of the structure formed by the multiple main frame engaging portions 173 and the multiple cover engaging portions 151 can just accommodate the drive wheel body 16 and the movable block 18, preventing the drive wheel body 16 from shaking.

[0129] In this embodiment of the invention, the cover 15 is further provided with at least one elastic arm 152 for elastically abutting against the drive tube 162, which can further fix the drive wheel body 16, improve the stability of the infusion structure 110 and the accuracy of drug infusion. Preferably, there are two elastic arms 152, arranged on both sides of one of the drive wheels 161, respectively abutting against the drive tube 162, such as... Figure 8b As shown, the multi-point fixed drive wheel body 16.

[0130] The cover 15 is also provided with a baffle 153, which has a bevel. A slot 173 is also provided on the side of the main frame 17 near the medicine storage cylinder 131 to accommodate a baffle bar (not shown in the figure). The baffle bar abuts against the baffle 153 to form a through hole for accommodating the screw 135, while simultaneously confining the drive wheel body 16 and the movable block 18 within the main frame 17. Preferably, the bevel of the baffle 153 is semi-circular, with a diameter adapted to the diameter of the screw 135, to better accommodate the screw 135 and prevent the screw 135 from wobbling significantly under external force.

[0131] Preferably, in this embodiment of the invention, the cover is an integrally molded structure, which is simple to manufacture, small in size, firmly connected, saves materials, and reduces costs.

[0132] Figures 9a-9d These are cross-sectional and three-dimensional structural schematic diagrams of the movable block 18 in the open and closed states according to an embodiment of the present invention.

[0133] The movable block 18 also includes an upper movable block 182 and a lower movable block 183, with the lower movable block 183 further having a lower movable block end 1831. When the movable block 18 is open, the upper movable block 182 is close to the drive wheel 161, and the lower movable block 183 is away from the drive wheel 161. The threads inside the movable block 18 do not engage with the screw 135, allowing the screw 135 to slide smoothly within the movable block 18 and the drive tube 162. When the movable block 18 is closed, the upper movable block 182 is away from the drive wheel 161, and the lower movable block 183 is close to the drive wheel 161. In this case, the threads inside the movable block 18 engage with the screw 135, preventing the screw 135 from sliding within the movable block 18 and the drive tube 162.

[0134] In this embodiment of the invention, an arc-shaped blocking member 174 is also provided on the main frame 17 to limit the position of the lower movable block 183. When the movable block 18 is open, i.e., the upper movable block 182 is close to the drive wheel 161 and the lower movable block 183 is away from the drive wheel 161, the lower movable block end 1831 of the lower movable block 183 is located outside the arc-shaped blocking member 174, so that the movable block 183 is kept in the open state. At this time, the thread in the movable block 18 does not engage with the screw 135, and the screw 135 can slide smoothly in the movable block 18 and the drive tube 162. When the movable block 18 is in the open state, medicine can be poured into the medicine storage cylinder 131. During the process of pouring medicine into the medicine storage cylinder 131, the screw 135 can move smoothly towards the end of the drive wheel 161 under the pushing action generated during the pouring process until the pouring is completed, without the assistance of other components. The structure is simple, highly integrated, cost-saving, and reduces the volume of the infusion structure 110, while maximizing the utilization of the actual medicine storage space of the medicine storage cylinder 131.

[0135] When the movable block 18 is closed, i.e., the movable block 182 is away from the drive wheel 161 and the lower movable block 183 is close to the drive wheel 161, the lower movable block end 1831 of the lower movable block 183 is located inside the arc-shaped blocking member 174, and the movable block 18 remains in the closed state. At this time, the thread inside the movable block 18 engages with the screw 135, and the screw 135 cannot slide between the movable block 18 and the drive tube 162. When the drug infusion is completed and the infusion device 110 performs drug infusion, the drive end 1312 of the drive unit 1310 pushes the drive wheel 161 forward. The movable block 18 rotates with the drive wheel 161. During the rotation, the lower movable block end 1831 passes around the arc-shaped blocking member 174. Since there is no longer any obstruction from the arc-shaped blocking member 174, the lower movable block end 1831 falls into the inner side of the arc-shaped blocking member 174. At the same time, since the movable block 18 remains in the closed state, the screw 135 can only move away from the drive wheel 161 under the pushing action generated by the rotation of the drive wheel 161 to perform drug infusion. There is no need to worry that the screw 135 will move freely due to the failure of the thread engagement between the screw 135 and the movable block 18 or the drive tube 162, which would affect the infusion effect or even cause the infusion device to fail.

[0136] In this embodiment of the invention, a notch 1611 is provided on the end face of the drive wheel 16 near the drug storage cylinder 131. The notch is shaped to fit the lower movable block 183 and is used to accommodate the lower movable block 183. When the end 1831 of the lower movable block passes around the arc-shaped blocking member 174 and falls into the inner side of the arc-shaped blocking member 174, the lower movable block 183 is accommodated in the notch 1611 of the drive wheel 161, making full use of the space of the drive wheel body, optimizing the internal design of the infusion structure, and reducing the volume of the infusion device.

[0137] It should be noted here that "inner side" and "outer side" are relative to the arc-shaped blocking component 174, and are relative positional concepts. The positional relationship is as follows: Figure 9b or Figure 9d As shown.

[0138] Figure 10a This is a schematic diagram of the structure of the adhesive patch 120 in an embodiment of the present invention. Figure 10b This is a schematic diagram of the structure of each layer of the adhesive patch 120. Figure 10c This is a schematic diagram of the stacking order of the adhesive patch 120.

[0139] The adhesive patch 120 includes an adhesive tape 1201. The first α side of the adhesive tape 1201 is fixedly connected to the lower housing 110b of the infusion structure 110, and the second β side is coated with an adhesive material for attaching the infusion device to the host's skin surface. The adhesive tape 1201 is made of polyethylene, polypropylene, non-woven fabric, or pure cotton. The adhesive tape 1201 is in direct contact with the host's skin. Choosing these materials, depending on the actual usage environment, can avoid adverse reactions caused by prolonged contact between the adhesive tape 1201 and the skin. To accommodate the movement of the host's skin, such as bending and stretching, the adhesive tape 1201 is very thin, for example, approximately 0.001µm to 1µm. Such a thin adhesive tape can cause other problems, such as static electricity on the host's skin. Before installation on the skin surface, static electricity can cause the tape to curl or peel, preventing it from lying flat on the skin surface. Alternatively, after installation, vigorous skin movement can cause the edges of the tape to curl or peel. Once the edge of the adhesive tape curls or peels up, the area of ​​curled or peeling edges will gradually increase with the increase of usage time, resulting in a decrease in the adhesion between the adhesive tape 1201 and the skin. This may cause the infusion device to shift or fall off, affecting the user experience.

[0140] A protective film 1202 is added to the outer edge of the first α side of the adhesive tape 1201. The Rockwell hardness of the protective film 1202 is greater than that of the adhesive tape 1201. In a preferred embodiment of the present invention, the Rockwell hardness of the protective film 1202 is 80-100 HRM.

[0141] In a preferred embodiment of the present invention, the protective film 1202 is one of polycarbonate, polyamide, polyoxymethylene, polyphenylene ether, polyester, polyphenylene sulfide, and polyarylate.

[0142] In a more preferred embodiment of the present invention, the protective film 1202 is polyethylene terephthalate (PET) with a Rockwell hardness of 90-95 HRM.

[0143] The outer contour of the protective film 1202 is adapted to the outer contour of the adhesive tape 1201. Here, adaptation means that the outer contour dimensions, bending radius, shape and other parameters of the protective film 1202 are consistent with the outer contour parameters of the adhesive tape 1201, so that every part of the outer edge of the adhesive tape 1201 can adhere to the protective film 1202.

[0144] In a preferred embodiment of the present invention, the thickness of the protective film is 0.01 to 100 μm.

[0145] In another preferred embodiment of the present invention, the protective film 1202 has a ring-shaped structure. The hollow structure of the ring-shaped structure allows the protective film to adhere to the first α side of the adhesive tape 1201 without interfering with the infusion device. Furthermore, the inner and outer contours of the protective film of the ring-shaped structure are consistent, which is more aesthetically pleasing and enhances the user experience.

[0146] In this embodiment of the invention, a first through hole 12011 is provided on the adhesive tape 1201, and the position of the first through hole 12011 corresponds to the part of the infusion needle 121 that is inserted into the body, such as... Figure 10b As shown, it is used to pass the infusion needle 121 through to pierce the host's skin.

[0147] At least one layer of release paper 1203 is also provided on the second β side of the adhesive tape 1201. The release paper 1203 can prevent the adhesive material on the second β side of the adhesive tape 1201 from sticking together and can also protect the adhesive material from contamination.

[0148] In a preferred embodiment of the present invention, the release paper 1203 is a single-silicone release paper with a peel strength of 30-50g.

[0149] In this embodiment of the invention, a second through hole 12031 is provided on the release paper 1203. The position of the second through hole 12031 corresponds to the first through hole 12011, so that the infusion needle 121 can pass through the first through hole 12011 and the second through hole 12031 in sequence to pierce the host skin.

[0150] To facilitate the user's peeling of the release paper 1203 and adhesive tape 1201 and to save space, the release paper 1203 is preferably two layers with their peeling edges facing inwards towards each other. One peeling edge of one layer is bent outwards and covered by the peeling edge of the other layer. As described above, the adhesive patch 120 consists of a protective film 1202, adhesive tape 1201, and release paper 1203 sequentially from the α-side to the β-side.

[0151] Figure 11a and Figure 11b A three-dimensional structural schematic diagram of the control structure 200 and the infusion structure 210 according to another embodiment of the present invention.

[0152] In this embodiment of the invention, the main structural difference between the control structure 200 and the infusion structure 210 and the control structure 100 and the infusion structure 110 in the previous embodiments (as shown in Figures 2 and 3) is that the control structure 200 includes a first electrical contact point 203 and a first physical component 223, and the infusion structure 210 includes a second electrical contact point 213 and an in-situ detection module 222, which will be described in detail below. Other structures are consistent with the aforementioned control structure 100 and infusion structure 110, and will not be repeated here.

[0153] The second electrical contact 213 and the presence detection module 222 are both disposed on the boss 214 of the upper housing 211a of the infusion structure 210, which can make full use of the internal space of the infusion device and optimize the circuit structure of the circuit board or three-dimensional circuit. In other embodiments of the invention, the second electrical contact 213 and the presence detection module 222 may also be disposed at other locations of the infusion structure 210, which is not limited here.

[0154] The in-situ detection module 222 includes a second physical component 2221, such as a piezoresistive device, a magnetic component, an inductor, a capacitor, etc. Those skilled in the art will understand that the above-mentioned physical components can also be used in combination, and the physical components that can be used in the in-situ detection module 223 are not limited to these; other physical components capable of triggering position signals can also be used here. The first physical component 223 and the second physical component 2221 are operably electrically connected. Here, "operable" electrical connection means that, depending on the type of the first physical component 223 and the second physical component 2221, they have different electrical connection methods.

[0155] Figure 12a This is a schematic diagram of an in-situ detection module including a piezoresistive device, according to another embodiment of the present invention.

[0156] In this embodiment of the invention, the second physical component 2221 of the in-situ detection module 222 is a piezoresistive device. The piezoresistive device is sensitive to pressure; changes in pressure exerted on it by external devices can cause changes in its resistance value. These changes can be linear or nonlinear. This principle can be used to detect the degree of bonding between the control structure 200 and the infusion structure 210.

[0157] The second physical component 2221 is a piezoresistive device located on the protrusion 214 of the infusion structure 210. Correspondingly, the first physical component 223 on the control structure is a rigid electrical contact. When the control structure is installed on the infusion structure, the rigid electrical contact contacts the piezoresistive device. As those skilled in the art will know, in order to form a closed-loop circuit, there are two rigid electrical contacts, namely the first rigid electrical contact 223a and the second rigid electrical contact 223b.

[0158] In this embodiment of the invention, when the control structure and the infusion structure are normally connected, the rigid electrical contact point contacts the piezoresistive device, generating a base pressure F1. Corresponding to this base pressure, the piezoresistive device generates a base resistance R1. When the connection between the control structure and the infusion structure becomes loose and misaligned, the pressure generated by the contact between the rigid electrical contact point and the piezoresistive device decreases, for example, becoming F2. Obviously, F2 < F1, and the corresponding resistance value of the piezoresistive device becomes R2. If the piezoresistive device is a positive feedback device, then R2 < R1; conversely, if the piezoresistive device is a negative feedback device, then R2 > R1. When the connection between the control structure and the infusion structure becomes tight, the pressure generated by the contact between the rigid electrical contact point and the piezoresistive device increases, for example, becoming F3. Obviously, F3 > F1, and the corresponding resistance value of the piezoresistive device becomes R3. If the piezoresistive device is a positive feedback device, then R3 > R1; conversely, if the piezoresistive device is a negative feedback device, then R3 < R1.

[0159] Regardless of whether the voltage-varistor device is a positive feedback device or a negative feedback device, its resistance value has a unique correspondence with the pressure it receives. The pressure it receives is positively correlated with the strength of the connection between the control structure and the injection structure. Therefore, the resistance value of the voltage-varistor device indirectly characterizes the strength of the connection between the control structure and the injection structure.

[0160] In a preferred embodiment of the present invention, the resistance value R of the voltage transformer device is converted into relative position data between the control structure and the infusion structure after being processed by a relevant algorithm. This data is then wirelessly transmitted by the control structure to a remote device, such as a PDM (Personal Diabetes Manager) or a mobile terminal, so that users can understand the tightness of the control structure in real time.

[0161] In a preferred embodiment of the present invention, the voltage-transformer device is a voltage-transformer conductive adhesive strip. The voltage-transformer conductive adhesive strip is easy to cut and can be processed into any shape to meet the structural design requirements of the detection device.

[0162] Figure 12b This is a schematic diagram of an in-situ detection module including a magnetic component, according to another embodiment of the present invention.

[0163] In this embodiment of the invention, the second physical component 3221 of the in-situ detection module is a magnetic element that provides a stable magnetic field. At different effective distances, the magnetic element has different magnetic field directions and intensities. This principle can be used to detect the degree of bonding between the control structure and the infusion structure.

[0164] The second physical component 3221 is a magnetic component, and correspondingly, the first physical component 323 on the infusion structure is a magnetic sensing element. When the control structure is installed on the infusion structure, the magnetic sensing element senses the direction or intensity of the magnetic field of the magnetic component, or simultaneously senses both the direction and intensity of the magnetic field. The direction or intensity of the sensed magnetic field varies depending on the distance O between the magnetic sensing element and the magnetic component. Preferably, the magnetic sensing element senses the magnetic field intensity H of the magnetic component.

[0165] In this embodiment of the invention, when the infusion structure and the control structure are normally connected, the distance between the magnetic sensing element and the magnetic component is O1, and the magnetic sensing element senses the basic magnetic field strength H1 of the magnetic component. When the connection between the infusion structure and the control structure becomes loose and misaligned, the distance between the magnetic sensing element and the magnetic component increases, for example, to O2, where O2 > O1, and the corresponding magnetic field strength sensed by the magnetic sensing element becomes H2, which is obviously H2 < H1. When the connection between the infusion structure and the control structure becomes tight, the distance between the magnetic sensing element and the magnetic component decreases, for example, to O3, where O3 < O1, and the corresponding magnetic field strength sensed by the magnetic sensing element becomes H3, which is obviously H3 > H1.

[0166] Regardless of how the distance O between the magnetic sensing element and the magnetic component changes, there is a unique correspondence between the distance O and the magnetic field strength H. The distance between the magnetic sensing element and the magnetic component is related to the degree of bonding between the infusion structure and the control structure. Therefore, the magnetic field strength H of the magnetic component sensed by the magnetic sensing element indirectly characterizes the degree of bonding between the infusion structure and the control structure.

[0167] In a preferred embodiment of the present invention, the magnetic field strength H of the magnetic component sensed by the magnetic sensing element is converted into relative position data of the infusion structure and the control structure after being processed by a relevant algorithm. This data is then wirelessly transmitted by the control structure 200 to a remote device, such as a PDM (Personal Diabetes Manager) or a mobile terminal, so that users can understand the installation tightness of the infusion structure and the control structure in real time.

[0168] Figure 12c This is a schematic diagram of an in-situ detection module including an inductor coil, according to another embodiment of the present invention.

[0169] In this embodiment of the invention, the second physical component 4221 of the in-situ detection module is an inductor coil, and the inductance value L of the inductor coil can be calculated by the following formula:

[0170]

[0171] In the formula,

[0172] D is the diameter of the inductor coil;

[0173] l is the length of the inductor coil;

[0174] N is the number of turns in the inductor.

[0175] For the same inductor coil, its diameter D and number of turns N remain unchanged, while its length l can change with the compressive or tensile forces at both ends. When its length l changes, its inductance value L also changes. This principle can be used to detect the firmness of the connection between the infusion structure and the control structure.

[0176] The second physical component 4221 includes an inductor coil 4221a and a conductive boss 4221b. The conductive boss 4221b is located on the boss 411, and the inductor coil 4221a is electrically connected to the conductive boss 4221b. Correspondingly, the first physical component 423 on the infusion structure includes a pressing member 423a that contacts one end of the inductor coil and an elastic electrical contact point 423b that is electrically connected to the other end of the inductor coil through the conductive boss 3142b. As those skilled in the art will know, in order to obtain the inductance value L of the inductor coil, the conductive boss 4221b, the pressing member 423a, and the elastic electrical contact point 423b are all made of conductive materials.

[0177] In this embodiment of the invention, when the infusion structure and the control structure are normally connected, the pressing member 423a contacts one end of the inductor coil, and the elastic electrical contact 423b contacts the other end of the inductor coil. The pressing member 423a, the inductor coil, and the elastic electrical contact 423b form a closed circuit. The internal circuit within the infusion structure can obtain the inductance value L of the inductor coil. At this time, the distance between the infusion structure and the control structure is s1, and the length of the inductor coil is l1. Corresponding to this length of the inductor coil, the basic inductance value of the inductor coil is L1. When the connection between the infusion structure and the control structure becomes loose and misaligned, the distance between the infusion structure and the control structure becomes s2. The pressing member 423a moves with the infusion structure, and the length of the inductor coil becomes l2. Since s2 > s1 and l2 > l1, the inductance value of the inductor coil becomes L2. Obviously, L2 < L1. When the connection between the infusion structure and the control structure becomes tighter, the distance between them becomes s3. The pressing element 423a moves with the infusion structure, and the length of the inductor coil becomes l3, where s3 < s1 and l3 > l1. At this time, the inductance of the inductor coil becomes L3, which is obviously greater than L1. Regardless of how the distance between the infusion structure and the control structure changes, since the elastic electrical contact 423b is made of elastic material, it can maintain good electrical contact with the inductor coil unless the infusion structure is completely detached from the control structure.

[0178] Regardless of how the length l of the inductor coil changes, there is a unique correspondence between the length l and the inductance value L. The length l of the inductor coil is related to the strength of the connection between the inductance structure and the control structure. Therefore, the inductance value L of the inductor coil indirectly characterizes the strength of the connection between the inductance structure and the control structure.

[0179] In a preferred embodiment of the present invention, the inductance value L of the inductor coil is converted into relative position data between the infusion structure and the control structure after being processed by a relevant algorithm. This data is then wirelessly transmitted by the control structure 200 to a remote device, such as a PDM (Personal Diabetes Manager) or a mobile terminal, so that the user can understand the tightness of the infusion structure installation in real time.

[0180] Figure 12d This is a schematic diagram of an in-situ detection module including the lower electrode of a capacitor, according to another embodiment of the present invention.

[0181] In this embodiment of the invention, the second physical component 5221 of the in-situ detection module includes the lower electrode of a capacitor. Correspondingly, the first physical component 523 includes the upper electrode 523a and an elastic electrical contact 523b of the capacitor. The upper electrode 523a and the lower electrode combine to form a complete capacitor. The elastic electrical contact 523b is used to make electrical contact with the lower electrode to form a closed circuit. The internal circuit in the infusion structure can measure the capacitance value C of the capacitor. The capacitance value C of the capacitor can be determined by the following formula:

[0182]

[0183] In the formula: ε is a constant;

[0184] S is the area of ​​the upper and lower plates of the capacitor facing each other;

[0185] k is the electrostatic constant;

[0186] d is the distance between the upper and lower plates of the capacitor.

[0187] For a capacitor composed of upper and lower plates, its facing area S and electrostatic constant ε are constant and will not change. However, the distance d between the upper and lower plates can vary depending on the strength of the connection between the infusion structure and the control structure. When the distance d changes, the capacitance C will also change. This principle can be used to detect the strength of the connection between the infusion structure and the control structure.

[0188] As previously described, the first physical component 523 includes an upper electrode 523a and a flexible electrical contact 523b of a capacitor. The upper electrode 523a and the lower electrode together form a complete capacitor, and the flexible electrical contact 523b is used to make electrical contact with the lower electrode to form a closed circuit. Those skilled in the art will understand that the flexible electrical contact 523b is made of a conductive material in order to obtain the capacitance value.

[0189] In this embodiment of the invention, when the infusion structure and the control structure are normally connected, the upper electrode 523a and the lower electrode form a capacitor, and the elastic contact 523b contacts the lower electrode to provide the lower electrode with a charge opposite to that of the upper electrode 523a. At this time, the distance between the upper electrode 523a and the lower electrode is d1, and the capacitance value of the capacitor is C1 corresponding to this distance. When the connection between the infusion structure and the control structure becomes loose and misaligned, the distance between the infusion structure and the control structure becomes d2, where d2 > d1, and the capacitance value of the capacitor becomes C2, which is obviously C2 < C1. When the connection between the infusion structure and the control structure becomes tight, the distance between the infusion structure and the control structure becomes d3, where d3 < d1, and the capacitance value of the capacitor becomes C3, which is obviously C3 > C1. Regardless of how the distance between the infusion structure and the control structure changes, since the elastic contact 523b is made of elastic material, it can maintain good electrical contact with the inductor coil unless the infusion structure is completely detached from the control structure.

[0190] Regardless of how the distance d between the upper and lower plates of the capacitor changes, there is a unique correspondence between the distance d and the capacitance value C. The distance d between the upper and lower plates is related to the strength of the connection between the infusion structure and the control structure. Therefore, the capacitance value C of the capacitor indirectly characterizes the strength of the connection between the infusion structure and the control structure.

[0191] In a preferred embodiment of the present invention, the capacitance value of the capacitor is converted into relative position data between the infusion structure and the control structure after being processed by a relevant algorithm. This data is then wirelessly transmitted by the control structure 200 to a remote device, such as a PDM (Personal Diabetes Manager) or a mobile terminal, so that the user can understand the tightness of the infusion structure in real time.

[0192] In the above embodiments, the internal circuit of the control structure 200 is also provided with a signal threshold range for normal operation of the control structure. Figure 13 This diagram illustrates the normal in-situ signal threshold range. The in-situ detection module may be one or a combination of several of the following: a piezoresistive device, an inductor, a magnetic component, or a capacitor. The strength of the connection between its parameter signal and the infusion structure and control structure may be linear or nonlinear, and may be a positive or negative feedback relationship. Regardless of the relationship, the strength of the connection between the parameter signal and the infusion structure and control structure is uniquely matched. Therefore, the parameter signal has a unique maximum threshold and a unique minimum threshold. The interval between these maximum and minimum thresholds is the normal in-situ threshold range, within which the control structure is normally fixed to the infusion structure.

[0193] If the parameter signal exceeds the normal in-situ threshold range, it indicates that the control structure has become loose, or that the control structure is too tightly connected to the infusion structure due to external pressure. At this time, the internal circuit of the control structure will issue an alarm signal, prompting the user to press the control structure, replace the infusion structure, or cancel the external pressure.

[0194] To meet the needs of different users, the alarm signal can be designed to be one or a combination of light, vibration, and sound signals.

[0195] Figure 14 This is a schematic diagram of the internal structure of an infusion structure containing a blockage detection module according to an embodiment of the present invention.

[0196] In this embodiment of the invention, the infusion device is further provided with a blockage detection module, which is operably connected to the control structure. This module is used to sense and measure relevant physical parameters during the drug infusion process to confirm whether a blockage has occurred. The blockage detection module includes a detection circuit (not shown in the figure) and at least one detection element 311. The detection circuit is disposed in the control structure, and the detection element 311 is disposed in the infusion structure 310. The detection circuit and the at least one detection element 311 cooperate to provide the corresponding signals, data, or information that need to be analyzed and processed for the purpose of blockage detection. The detection circuit also stores preset thresholds for each relevant physical parameter, and a comparator that compares the sensed relevant physical parameters with the preset thresholds. When the sensed relevant physical parameter is greater than or less than the corresponding preset threshold, the detection circuit issues an alarm signal to remind the user that a blockage has occurred, to stop the infusion, and to replace the infusion structure or perform other operations to avoid safety hazards.

[0197] In one embodiment of the present invention, the detection element 311 is a component of the infusion device itself. The power component 313 is preferably an electrically driven linear actuator or an electrically heated linear actuator, such as a shape memory alloy. A timer is included in the detection circuit to record the time taken for the power component 313 to pull the drive end 314, causing the drive wheel 315 to rotate, and subsequently pushing the piston 312 forward one step. When the time for the piston 312 to advance one step exceeds a preset threshold, the detection circuit issues an alarm signal to alert the user of a blockage. In this embodiment of the present invention, the power component is a component of the infusion device itself. Using this component as a detection element can optimize the internal structure of the infusion device and reduce costs.

[0198] In other embodiments of the invention, the detection element 311 is a component not part of the infusion device itself, such as one or more of a force sensor, an acceleration sensor, and a position detection element. Figure 14 As shown, the detection element 311 is disposed in the storage piston 312. In other embodiments of the present invention, the detection element 311 may also be disposed in other components of the infusion structure 310, such as the screw 316, the connection between the screw 316 and the piston 312, etc., at one or more locations. No limitation is made here, and it can be flexibly disposed according to the actual structure to optimize the internal design of the infusion structure.

[0199] In another embodiment of the present invention, the detection element 311 is a force sensor, specifically a tension sensor. During the drug infusion or infusion process, the tension sensor is used to sense the magnitude of the force exerted by the power component 313 on the screw 316 or piston 312. When the sensed force is greater than a certain preset threshold, the detection circuit issues an alarm signal to remind the user that a blockage has occurred.

[0200] In one embodiment of the present invention, the detection element 311 is a force sensor, specifically a pressure sensor. During the drug infusion or administration process, the pressure sensor senses and measures the pressure applied to the drug by the piston. When the sensed pressure is greater than a certain preset threshold, the detection circuit issues an alarm signal to remind the user that a blockage has occurred.

[0201] In another embodiment of the present invention, the detection element 311 is an acceleration sensor. During the drug filling or infusion process, the acceleration sensor can sense and measure the speed or acceleration of the screw 315 or piston 312 moving in the drug storage cylinder 313. The detection circuit converts it into the change value of speed and acceleration per unit time. When the detected change value is less than a certain preset threshold, the detection circuit issues an alarm signal to remind the user that a blockage has occurred.

[0202] In another embodiment of the present invention, the detection element 311 is a position detection element. During the drug filling or infusion process, the position detection element detects the axial (along the direction of movement of the screw 136) position change of the piston 312 or screw 136 end in the drug storage cylinder 317. The detection circuit converts the axial position information of the piston 312 or screw 136 end in a unit time into the speed or acceleration of the piston 312 or screw 136 end moving in the drug storage cylinder 317, and further calculates the change value of the speed or acceleration of the piston 312 or screw 136 end moving. When the change value is less than a certain preset threshold, the detection circuit issues an alarm signal to remind the user that a blockage has occurred.

[0203] Preferably, in this embodiment of the invention, the position detection element detects the position of the piston 312 or the end of the screw 136 in a non-contact detection method. The position detection element is a magnetic element used to provide a magnetic field. The detection circuit is provided with a magnetic sensing element. The magnetic field strength sensed by the magnetic sensing element changes with the position of the magnetic element, i.e., the end of the piston 312 or the screw 136. Therefore, by sensing the change in the magnetic field, the detection circuit can calculate the position change of the end of the piston 312 or the screw 136, and further detect whether a blockage has occurred, as mentioned above.

[0204] Preferably, in this embodiment of the invention, the detection element 311 is disposed in the piston 312, and the piston 312 is provided with at least one recess 3121 for accommodating the detection element 311. The inner side of the recess 3121 is also provided with a plurality of protrusions 3122 for fixing the detection element 311. The middle of the recess 3121 is also provided with a positioning part 3123 to further fix the detection element 311 and prevent the detection element 311 from shaking and causing deviation in the sensing information, thus affecting the detection result.

[0205] In another embodiment of the present invention, the detection element 311 is a combination of a force sensor, a pressure sensor, an acceleration sensor, a position detection element, and a power component, which can achieve more accurate blockage detection and improve user experience.

[0206] To meet the needs of different users, alarm signals can be designed as one or a combination of light, vibration, and sound signals. Different signal formats allow users to obtain alarm signals in a timely manner as needed and take corresponding measures, thereby enhancing the user experience.

[0207] Figure 15a This is an exploded view of the infusion structure 410 according to an embodiment of the present invention. Figure 15b This is a schematic diagram of the structure of the lower housing according to an embodiment of the present invention. Figure 15c This is a schematic diagram of the main frame according to an embodiment of the present invention.

[0208] The infusion structure 410 includes an upper shell 411, a lower shell 412, and a main frame 417 disposed between the upper shell 411 and the lower shell 412. The upper shell 411 is provided with multiple upper shell first engaging portions 4111 and upper shell second engaging portions 4112, and the lower shell 412 is provided with multiple lower shell first engaging portions 4121 and lower shell second engaging portions 4122. The main frame 417 is provided with a main frame first engaging portion 4171 that engages simultaneously with the upper shell first engaging portions 4111 and lower shell first engaging portions 4121, thereby increasing the stability of the longitudinal engagement between the main frame 417 and the upper shell 411 and lower shell 412, while reducing the complexity of the engagement design. The second engaging portion 4112 of the upper housing and the second engaging portion 4122 of the lower housing engage on the side of the main frame. After engagement, they prevent the main frame 417 from moving laterally, increasing the stability of the lateral engagement between the main frame 417 and the upper housing 411 and the lower housing 412. Here, "longitudinal" refers to the thickness direction of the infusion device, and "lateral" refers to the length direction of the infusion device. Figure 3a As shown. Each engaging part includes 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 upper housing 411, lower housing 412, and main frame 417. There are no specific restrictions here, as long as the lateral and longitudinal engagement stability of the upper housing 411, lower housing 412, and main frame 417 can be achieved.

[0209] A circuit board is provided on the lower housing 412 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 410. At the same time, multiple connection terminals can be provided on the flexible circuit board to electrically connect with the electrical connection terminals on the main frame 417, optimizing the circuit structure, thereby realizing the circuit conduction inside the infusion structure 410 and improving the electrical connection stability of each structure.

[0210] The main frame 417 supports the various structures inside the infusion structure 410. Here, the side of the main frame 417 facing the upper shell 411 is called the upper side, and the side facing the lower shell 412 is called the lower side. With the opening end of the drug reservoir as the boundary, the side used to accommodate the drug reservoir is called the right side, and the other side is called the left side. It should be noted that "upper side," "lower side," "left side," and "right side" are relative positional concepts, and their positional relationships are as follows: Figure 15a As shown. The right side of the main frame 417 is provided with a medicine storage cylinder receiving cavity for accommodating the medicine storage cylinder. The shape is adapted to the medicine storage cylinder. The lower side of the main frame 417 is provided with multiple protrusions 4173 for supporting the medicine storage cylinder. The right side of the main frame 417 is also provided with multiple main frame second engaging parts 4172. The outside of the medicine storage cylinder is provided with multiple medicine storage cylinder engaging parts (not shown), which engage with the main frame second engaging parts 4172 to make the medicine storage cylinder and the main frame 417 stably connected.

[0211] A drive wheel assembly and a power supply are located on the upper left side of the main frame 417. The power supply consists of dual-row batteries, located on either side of the drive wheel assembly. All electrical connection elements in the infusion structure 410 are located on the lower left side of the main frame 417. The power supply provides power to the components connected to the circuit board via an approximately "L"-shaped elastic conductive element, thus enabling circuit conduction within the infusion structure 410. For example... Figure 4a and Figure 4c As shown, the main frame 417 is provided with multiple positioning posts 138 for the elastic conductors 136, the positions of which are adapted to the power supply positions, for fixing the elastic conductors 136; the main frame 417 is also provided with through holes 4174 (e.g., Figure 15aAs shown, the elastic conductor 136 achieves electrical connection between the power supply and the circuit board on the upper and lower sides of the main frame 137 through the through hole 4174, thereby enabling power supply to various components; a rotating shaft 1315 is also provided to sleeve the drive unit 1310 and provide a fulcrum for the rotation of the drive unit 1310, and is located between the drive wheels 134; a conductive baffle 1318 is also provided at the end of the drive unit 1310 to limit the end point of the drive unit's movement; a conductive spring 1315 is also provided on the drive unit 1310 to connect the drive unit 1310 and the circuit board, providing electrical conductivity. The tower spring 1315, being smaller in the middle and larger at both ends, can improve the electrical connection stability with the circuit board while fixing the drive unit 1310. Multiple positioning platforms 1319 for the power components 1311 are also provided between the conductive platform 1314 and the elastic conductor 1316, ensuring that the power components 1311 can only be arranged along the straight line defined between the positioning platforms 1319, preventing short circuits caused by the power components 1311 touching other conductive elements, thus preventing the infusion device from malfunctioning. A conductive platform positioning post 1317 and a stop block 1316 are also provided at the end for fixing the conductive platform 134, such as... Figure 7 As shown. The specific structure of each component is as described above and will not be repeated here. Through the above-mentioned main frame 417, all components of the infusion structure 410 can be integrated on the main frame 417, making full use of the internal space of the infusion structure 410, improving the integration of the internal structure, effectively reducing the volume of the infusion structure 410, while ensuring the structural stability and electrical connection stability of each component, and improving the electrical connection reliability of the internal structure of the infusion structure 410.

[0212] In this embodiment of the invention, the main frame 417 can be an integral injection-molded part including its upper, lower, left, and right side structures, or it can be formed by splicing various structures together, such as some integral injection-molded parts being spliced ​​with other structures, or various structures being spliced ​​together to form a whole. The internal components of each structure can also be selected as either integral parts or spliced ​​together according to actual needs, without specific limitations. When the main frame 417 is an integral part, the process is simple, the size is small, the connection is strong, materials are saved, and costs are reduced. When the main frame 417 is a spliced ​​integral part, the selection can be flexible according to the requirements of the components that the main frame needs to support, optimizing the internal design of the injection structure.

[0213] In summary, this invention discloses a patch-type drug infusion device. The conductive tower spring of the infusion structure has a small diameter in the middle part and a large diameter at both ends in the axial direction. It is used to fix the drive unit and prevent the drive unit from rotating due to accidental contact, which would affect the accuracy of the infusion. At the same time, it electrically connects the drive unit to a specific connection terminal on the circuit board or three-dimensional circuit. When the conductive tower spring is compressed, multiple turns of spring at both ends are connected to the specific connection terminal on the drive unit and the circuit board or three-dimensional circuit, which can enhance the stability of the electrical connection between the conductive spring and the specific connection terminal on the drive unit and the circuit board or three-dimensional circuit, and improve the reliability of the electrical connection.

[0214] 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 device, characterized by, The infusion structure comprises an infusion module and a circuit module, the circuit module comprises: a three-dimensional circuit coated on part of the surface of the structure, for supplying power to the structural units; a driving unit for driving the driving wheel of the infusion structure to infuse medicine; a conductive coil spring comprising an A section with a small diameter in the central part in the axial direction, B and C sections with large diameters at both ends, and the diameters of the B and C sections gradually expand like a horn towards both ends; a main frame for bearing the components of the infusion structure, the main frame is further provided with a rotating shaft, the driving unit is sleeved on the rotating shaft and rotates around the rotating shaft; the conductive coil spring is sleeved on the rotating shaft; wherein the diameter of the A section of the conductive coil spring is uniform, and it is fixed on the rotating shaft by interference fit, further fixing the driving unit, at the same time, the B section is electrically connected with the driving unit, and the C section is electrically connected with the electrical connection end on the three-dimensional circuit, when the B section and the C section are respectively electrically connected with the driving unit and the electrical connection end, the conductive coil spring is compressed; a control structure electrically connected with the infusion structure, the control structure and the infusion structure are separate structures, and the control structure is reusable; and an adhesive patch for adhering the control structure and the infusion structure to the skin surface; The infusion structure further comprises a shell, the shell comprises an upper shell and a lower shell, the lower shell is provided with an outwardly extending portion, the outer side of the extending portion is provided with a blocking block and a pressing portion, the inner side of the blocking block is provided with an unlocking hole, when the pressing portion is pressed, the user's index finger can enter the unlocking hole, and then the control structure is ejected, realizing the separation of the control structure from the infusion structure; The lower shell is further provided with a crease groove, and the thickness or width of the lower shell at the position of the crease groove is thinned. The two end parts of the conductive coil spring are symmetrical structures.

2. The patch-type drug infusion device according to claim 1, characterized in that, When the conductive coil spring is compressed, the two end parts of the conductive coil spring are respectively in contact with the driving unit and the connection end on the three-dimensional circuit through multiple turns of springs.

3. The patch-type drug infusion device according to claim 2, wherein The driving unit comprises a driving end, and the driving end is one or two.

4. The patch-type drug infusion device according to claim 1, wherein The infusion structure further comprises a power supply and an elastic conductive body with a protrusion, for electrically connecting the power supply and the connection end on the three-dimensional circuit.

5. The patch-type drug infusion device according to claim 1, wherein The elastic conductive body comprises one or more of conductive springs, conductive spring sheets, conductive rubber or conductive silicone.

6. The patch-type drug infusion device according to claim 5, wherein The power supply is a double-row structure.

7. The patch-type drug infusion device according to claim 5, wherein 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 a plurality of second electrical contacts electrically connected with the first electrical contacts.

8. The patch-type drug infusion device according to claim 1, wherein The first electrical contacts or the second electrical contacts are rigid metal contacts or elastic conductive parts.

9. The patch-type drug infusion device according to claim 8, wherein ​ 10. The patch-type drug infusion device according to claim 1, wherein The adhesive patch comprises an adhesive tape and a protective film, the first surface of the adhesive tape is fixedly connected with the infusion device, the second surface opposite to the first surface of the adhesive tape is coated with an adhesive material; the protective film is fixedly connected around the outer edge of the first surface of the adhesive tape, the outer edge contour of the protective film is adapted to the outer edge contour of the adhesive tape, and the Rockwell hardness of the protective film is higher than that of the adhesive tape.

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