Patch-type drug infusion device

Abstract

The application discloses a patch type medicine infusion device, which comprises an infusion structure, a control structure and an adhesive patch. The infusion structure comprises a medicine storage cartridge for containing medicine to be infused, an internal screw rod and a piston connected with the screw rod. A driving wheel assembly is threadedly connected with the screw rod, and comprises a driving wheel body and a movable block. The driving wheel body and the movable block are operatively connected. When the movable block is in an open state, the screw rod is not engaged with the driving wheel assembly. When the movable block is in a closed state, the screw rod is engaged with the driving rod. The control structure is electrically connected with the infusion structure. The adhesive patch is used for pasting the control structure and the infusion structure to the skin surface. The connection between the driving wheel of the infusion structure and the screw rod is simple, low in cost, small in size and good in user experience.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

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

[0003] The present invention mainly relates to the field of medical devices, and in particular to a patch-type drug infusion device. Background Art

[0004] In a healthy individual, the pancreas automatically monitors blood glucose levels and secretes the necessary insulin and glucagon. However, in diabetics, the pancreas malfunctions, preventing it from producing the necessary insulin. Therefore, diabetes is a metabolic disease caused by abnormal pancreatic function and is a lifelong condition. Currently, medical technology cannot cure diabetes; the only approach is to control the onset and progression of diabetes and its complications by stabilizing blood sugar levels.

[0005] Diabetic patients need to test their blood sugar before injecting insulin. Currently, most detection methods can continuously detect blood sugar and send blood sugar data to remote devices in real time for users to view. This detection method is called continuous glucose monitoring (CGM). This method requires the detection device to be attached to the surface of the skin, and the probe it carries is inserted into the subcutaneous tissue fluid to complete the detection. According to the blood sugar value detected by CGM, the infusion device will inject the currently required insulin into the subcutaneous tissue, thereby forming a closed-loop or semi-closed-loop artificial pancreas.

[0006] However, the connection structure between the driving wheel and the screw of the current drug infusion device is complex, resulting in a relatively large size of the infusion device, high cost, and poor user experience.

[0007] Therefore, the prior art urgently needs a drug infusion device with a simple connection between the driving wheel and the screw, high integration, small size, low cost, and good user experience. Summary of the Invention

[0008] The present invention discloses a patch-type drug infusion device, wherein a movable block is provided on a driving wheel assembly of an infusion structure, and when the movable block is in an open state, the screw and the driving wheel assembly do not mesh, and the screw can slide in the driving wheel assembly, and the drug filling can be completed by utilizing the thrust generated during the drug filling process, without the assistance of other components, and has a simple structure, low cost, and a small size of the infusion device; when the movable block is in a closed state, the screw and the driving rod mesh, and the screw can only slide under the pushing force generated by the rotation of the driving wheel and will not slide freely, so that the infusion effect is good and the user experience is high.

[0009] The present invention discloses a patch-type drug infusion device, comprising: an infusion structure, the infusion structure comprising: a drug storage cartridge for accommodating the drug to be infused, with a screw and a piston connected to the screw arranged inside; a drive wheel assembly threadedly connected to the screw, the drive wheel assembly comprising a drive wheel body and a movable block, the drive wheel body and the movable block being operably connected, when the movable block is in an open state, the screw and the drive wheel assembly are not engaged, and when the movable block is in a closed state, the screw and the drive rod are engaged; a control structure electrically connected to the infusion structure; and an adhesive patch for adhering the control structure and the infusion structure to the skin surface.

[0010] According to one aspect of the present invention, the infusion device also includes a main frame for supporting the various components of the infusion structure. An arc-shaped blocking member is provided on the main frame. When the movable block is located on the outside of the arc-shaped blocking member, the movable block is in an open state. When the movable block is located on the inside of the arc-shaped blocking member, the movable block is in a closed state.

[0011] According to one aspect of the present invention, the driving wheel assembly further comprises a cover, which is provided with a plurality of cover engaging portions, and the main frame is provided with a plurality of main frame engaging portions engaged with the plurality of cover engaging portions.

[0012] According to one aspect of the present invention, the cover is further provided with at least one elastic arm for abutting against the driving wheel body.

[0013] According to one aspect of the present invention, a card slot is further provided on the main frame, and a stop bar is provided in the card slot.

[0014] According to one aspect of the present invention, a baffle is further provided on the cover, and a groove is provided on the baffle. The baffle bar abuts against the baffle to form a through hole for accommodating the screw.

[0015] According to one aspect of the present invention, the cover is an integral injection molded part.

[0016] According to one aspect of the present invention, the movable block includes an upper movable block and a lower movable block, the lower movable block includes a lower movable block end portion, and the arc-shaped blocking member defines the position of the lower movable block through the lower movable block end portion.

[0017] According to one aspect of the present invention, a notch is provided on the driving wheel body, the shape of which is adapted to the lower movable block and is used to accommodate the lower movable block.

[0018] According to one aspect of the present invention, a connecting rod is provided on the movable block, and is movably connected to the driving wheel body via the connecting rod.

[0019] According to one aspect of the present invention, the conductive platform includes one or more of a conductive spring, a conductive elastic sheet, a conductive rubber or a conductive silicone.

[0020] According to one aspect of the present invention, the control structure and the infusion structure are separate structures, and the control unit is reusable.

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

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

[0023] According to one aspect of the present invention, the first electrical contact or the second electrical contact is a rigid metal contact or an elastic conductive member.

[0024] According to one aspect of the present invention, the infusion structure further comprises a shell, the shell is provided with an outward extending portion, and a blocking block is provided on the outer side of the extending portion.

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

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

[0027] The patch-type drug infusion device disclosed in the present invention is provided with a movable block on the driving wheel assembly of the infusion structure. When the movable block is in an open state, the screw and the driving wheel assembly do not engage, and the screw can slide in the driving wheel assembly. The drug infusion can be completed by utilizing the thrust generated during the drug infusion process, and no other components are required for assistance. The structure is simple, the cost is low, and the infusion device is small in size. When the movable block is in a closed state, the screw and the driving rod engage, and the screw can only slide due to the pushing force generated by the rotation of the driving wheel and will not slide freely, so the infusion effect is good and the user experience is high.

[0028] Furthermore, an arc-shaped blocking member is provided on the main frame, and the position or state of the movable block is limited by the arc-shaped blocking member, which has a simple structure, is easy to set up, and has low cost.

[0029] Furthermore, the cover is provided with a plurality of cover engaging parts, and the main frame is provided with a plurality of main frame engaging parts that engage with the plurality of cover engaging parts, thereby restricting the driving wheel assembly within the cover frame, thereby stabilizing the driving wheel assembly and preventing the driving wheel from shaking and affecting the infusion effect.

[0030] Furthermore, the cover is provided with at least one elastic arm, which is arranged on both sides of the driving wheel and elastically abuts against the driving wheel body to further fix the driving wheel body.

[0031] Furthermore, a stop bar is provided on the main frame, and a stop plate is provided on the cover. The stop bar and the stop plate abut against each other to form a through hole for accommodating the screw to prevent the screw from shaking, while restricting the drive wheel assembly within the cover to further stabilize the drive wheel assembly.

[0032] Furthermore, the cover is an integral injection molded part, which has a simple process, a small size, a firm connection, saves materials and reduces costs.

[0033] Furthermore, a recess is provided on the driving wheel body, the shape of which is adapted to the lower movable block for accommodating the lower movable block, thereby making full use of the space of the driving wheel body, optimizing the internal design of the infusion structure, and reducing the volume of the infusion device.

[0034] Furthermore, the control structure is provided with a first electrical contact, and the infusion structure is provided with a corresponding second electrical contact. The contact area of ​​the electrical contacts is small, which can be flexibly designed and effectively reduce the volume of the control structure and the infusion structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1a-Figure 1b are top views of drug delivery systems according to two different embodiments of the present invention;

[0036] Figure 2a-2b is a schematic diagram of the three-dimensional structure of a control structure according to an embodiment of the present invention;

[0037] Figure 3a is a schematic diagram of the three-dimensional structure of an infusion structure according to one embodiment of the present invention;

[0038] Figure 3b A side view of a control structure and an infusion structure assembled with each other according to one embodiment of the present invention;

[0039] Figure 3c Schematic diagram of the top view of the lower shell of the infusion structure according to one embodiment of the present invention;

[0040] Figure 3d is a schematic top view of the lower housing of the infusion structure according to another embodiment of the present invention;

[0041] Figure 4a-4b They are schematic diagrams of three-dimensional structures from two perspectives of the internal structure of an infusion structure according to one embodiment of the present invention;

[0042] Figure 4c is a schematic diagram of the three-dimensional structure of the internal structure of an infusion structure according to another embodiment of the present invention;

[0043] Figure 5 is a schematic diagram of the three-dimensional structure of an elastic conductor according to an embodiment of the present invention;

[0044] Figure 6 is a schematic diagram of the three-dimensional structure of a conductive spring according to an embodiment of the present invention;

[0045] Figure 7 for Figure 4a A partial enlarged view of

[0046] Figure 8a and Figure 8b They are schematic structural diagrams of the driving wheel assembly and the main frame 17 before and after assembly according to an embodiment of the present invention;

[0047] Figure 8c is a schematic diagram of the three-dimensional structure of a cover according to an embodiment of the present invention;

[0048] Figure 9a-9d Schematic diagrams of the cross-section structure and the three-dimensional structure of the movable block in the embodiment of the present invention when they are in the open and closed states respectively;

[0049] Figure 10a-Figure 10c Schematic diagram of the structure of an adhesive patch according to an embodiment of the present invention, schematic diagram of the structure of each layer and schematic diagram of the stacking sequence;

[0050] Figure 11a and Figure 11b A schematic diagram of the three-dimensional structure of a control structure and an infusion structure according to another embodiment of the present invention;

[0051] Figure 12a Schematic diagram of a presence detection module including a voltage-variable resistor device according to another embodiment of the present invention;

[0052] Figure 12b A schematic diagram of an in-situ detection module including a magnetic component according to another embodiment of the present invention;

[0053] Figure 12c A schematic diagram of a presence detection module including an inductive coil according to another embodiment of the present invention;

[0054] Figure 12d Schematic diagram of a presence detection module including a lower plate of a capacitor according to another embodiment of the present invention;

[0055] Figure 13 Schematic diagram of the threshold range of the normal presence signal;

[0056] Figure 14 is a schematic diagram of the internal structure of an infusion structure including a blockage detection module according to one embodiment of the present invention;

[0057] Figure 15a is an exploded view of an infusion structure according to one embodiment of the present invention;

[0058] Figure 15bA schematic structural diagram of a main frame according to an embodiment of the present invention;

[0059] Figure 15c Schematic diagram of the structure of the main frame according to one embodiment of the present invention. DETAILED DESCRIPTION

[0060] As mentioned above, the connection structure between the driving wheel and the screw of the prior art drug infusion device is complex, resulting in a relatively large size of the infusion device, high cost, and poor user experience.

[0061] In order to solve this problem, the present invention provides a drug infusion device, in which a movable block is provided on the driving wheel assembly of the infusion structure. When the movable block is in an open state, the screw and the driving wheel assembly do not engage, and the screw can slide in the driving wheel assembly. The drug filling can be completed by utilizing the thrust generated during the drug filling process, and no other components are required to assist. The structure is simple, the cost is low, and the infusion device is small in size; when the movable block is in a closed state, the screw and the driving rod engage, and the screw can only slide under the pushing force generated by the rotation of the driving wheel and will not slide freely, resulting in good infusion effect and high user experience.

[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 of components and steps, numerical expressions and numerical values ​​set forth in these embodiments should not be construed as limiting the scope of the present invention.

[0063] In addition, it should be understood that for ease of description, the sizes of the various components shown in the drawings are not necessarily drawn according to actual proportional relationships. For example, the thickness, width, length or distance of certain 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 present invention, its application, or use in any sense. Technologies, methods, and apparatus known to those skilled in the art may not be discussed in detail herein, but to the extent applicable, such technologies, methods, and apparatuses should be considered part of this specification.

[0065] It should be noted that like reference numerals and letters denote like items in the following figures, and thus, once an item is defined or described in one figure, it will not need to be further discussed in the subsequent figure descriptions.

[0066] Figure 1a-Figure 1b 1 and 2 are top views of drug infusion devices according to two different embodiments of the present invention.

[0067] The patch-type drug infusion device of the embodiment of the present invention includes 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 the present invention, the patch-type drug infusion device may also include more parts, which are not specifically limited here.

[0068] The patch-type drug infusion device refers to an infusion device that does not contain a long catheter, and the infusion device is entirely adhered to the user's skin surface with a single adhesive patch 120. The drug is infused directly from the drug storage cartridge 131 along the infusion needle into the subcutaneous tissue by the infusion needle unit 121 in the device.

[0069] In the embodiment of the present invention, the control structure 100 and the infusion structure 110 are of separate design, and the two are connected by a waterproof plug or directly snapped together and electrically connected to form a whole. When the control structure 100 and the infusion structure 110 are directly snapped together and electrically connected to form a whole, the reliability of the electrical connection can be improved, which will be described in detail below. The control structure 100 can be reused, and the infusion structure 110 can be discarded after a single use. Figure 1a In another embodiment of the present invention, the infusion structure 110 and the control structure 100 are designed as an integrated whole. The two are connected by a wire and are arranged inside the same housing 10. The adhesive patch 120 is attached to a certain position of the user's skin and is discarded as a whole after a single use. Figure 1b shown.

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

[0071] Figure 2a-2b FIG. 1 is a schematic diagram of the three-dimensional structure 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. These first electrical contacts 103 serve as circuit connection terminals, electrically connecting the internal circuitry of the control structure 100 and the infusion structure 110, respectively. The embodiments of the present invention do not impose specific limitations on the location of the first electrical contacts 103. Compared to terminals configured as connectors, the electrical contacts have a smaller contact area, allowing for flexible design and effectively reducing the size of the control structure. Furthermore, the electrical contacts can be directly electrically connected to internal circuitry or electrical components, or can be directly soldered to a circuit board, optimizing internal circuit design and effectively reducing circuit complexity, thereby saving costs and reducing the size of the infusion device. Furthermore, the electrical contacts' exposure on the surface of the control structure 100 facilitates electrical connection with terminals on other structures. The aforementioned technical advantages of the electrical contacts apply to both the first electrical contacts 103 on the control structure 100 and the second electrical contacts 113 on the infusion structure 110, and will not be further described below.

[0073] The first electrical contact 103 can be a rigid metal contact or a resilient conductive member. Preferably, in this embodiment of the present 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 within the control structure 100, while the other end is exposed on the surface of the housing 101. The remainder of the first electrical contact 103 is tightly embedded in the housing 101, thereby isolating the interior of the control structure 100 from the outside world.

[0074] Here, the elastic conductive member includes a conductive spring, conductive silicone, conductive rubber or conductive shrapnel, etc. Obviously, one end of the elastic conductive member is used to electrically connect to the connection end inside the control structure 100, and the other end is used to electrically connect to other connection ends. For example, in one embodiment of the present invention, the first electrical contact 103 is a conductive spring. When the electrical contacts are in contact with each other, the elasticity of the conductive spring can enhance the reliability of the electrical connection. Similar to a rigid metal contact, except that one end is exposed to the surface of the housing 101, the other part of the conductive spring is tightly embedded in the housing 101 and is electrically connected to the internal circuit or electrical component. Obviously, the connection end located inside the control structure 100 can be a conductive lead, or it can be a specific part of the circuit or electrical component.

[0075] It should be noted that "tightly embedded" in the embodiment of the present invention means that there is no gap between the electrical contacts and the housing 101, thereby achieving sealing of the interior of the control structure 100. "Tightly embedded" hereinafter has the same meaning as here.

[0076] In another embodiment of the present invention, the first electrical contact 103 is a conductive spring, but is not tightly embedded in the housing 101. Instead, a seal is provided around the area where the first electrical contact 103 is provided. The seal is provided 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 configured to engage with the second engaging portion 112 of the infusion structure 110, thereby assembling the control structure 100 and the infusion structure 110, thereby electrically connecting the first electrical contact 103 and the second electrical contact 113, as will be described in detail below.

[0078] The first engaging portion 102 and the second engaging portion 112 include one or more of 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. For example, they can be set inside or on the surface of the corresponding structure, etc., and there is no specific limitation here.

[0079] In the embodiment of the present invention, the control structure 100 is further provided with a recess 104 for assembling with the protrusion 114 at the bottom of the housing of the infusion structure 110, which will be described in detail below. Specifically, the first electrical contact 103 is provided in the recess 104, such as Figure 2b shown.

[0080] In this embodiment of the present invention, a buzzer (not shown) is also provided within the control structure 100. The buzzer is used to emit an alarm signal, such as sound or vibration, when an infusion begins or ends, when the infusion device malfunctions, when the drug is depleted, when the control structure 100 issues an erroneous instruction, or when it receives an error message, so that the user can be aware of the situation and make timely adjustments.

[0081] In this embodiment of the present invention, the housing 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 sound-permeable membrane (not shown) is provided between the sound-permeable hole 105 and the buzzer. Therefore, the waterproof sound-permeable membrane needs to have a certain porosity to prevent water molecules from entering the buzzer while ensuring that the sound can be transmitted.

[0082] Compared with the traditional technical solution of enclosing the buzzer inside the control structure 100, after providing the sound-permeable hole 105, the buzzer can emit a relatively small sound that can be perceived by the user, reducing the energy consumption of the buzzer, optimizing the power consumption configuration of the infusion device, and saving production costs.

[0083] Figure 3a Schematic diagram of the three-dimensional structure of the infusion structure 110 according to an embodiment of the present invention. Figure 3b FIG. 1 is a side view of the control structure 100 and the infusion structure 110 assembled with each other according to an embodiment of the present invention. Figure 3c This is a schematic top view of the lower shell of the infusion structure part according to one embodiment of the present invention. Figure 3d This is a schematic top view of the lower shell of the infusion structure part of another embodiment of the present invention.

[0084] The patch-type drug infusion device also includes an infusion structure 110. Within its housing are located an infusion module, a circuit module, and other auxiliary modules for drug infusion, which will be described in detail below. The housing of the infusion structure 110 may comprise multiple parts. In this embodiment of the present invention, the housing of the infusion device includes an upper housing 111a and a lower housing 111b.

[0085] As mentioned above, in the embodiment of the present 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 first engaging portion 102 and the second engaging portion 112 are provided at corresponding positions.

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

[0087] Preferably, in this embodiment of the present invention, the conductive spring has different diameters at both ends: the portion exposed to the outside of the infusion structure 110 has a shorter diameter, while the portion located within the infusion structure 110 has a longer diameter. The longer diameter can retain the conductive spring within the housing. Therefore, when the control structure 100 is not attached to the infusion structure 110, the longer diameter can prevent the conductive spring from falling off the infusion structure 110.

[0088] The embodiment of the present invention does not limit the location of the second electrical contact 113, as long as it can be electrically connected to the corresponding first electrical contact 103. Specifically, in the embodiment of the present invention, the bottom of the upper shell 111a of the infusion structure 110 includes a protrusion 114. The second electrical contact 113 is provided on the protrusion 114, such as Figure 3aThe protrusion 114 corresponds to the recess 104 on the control structure 100, and the two can be assembled with each other so that the first electrical contact 103 and the corresponding second electrical contact 113 are pressed against each other, thereby achieving electrical connection.

[0089] In other embodiments of the present invention, the protrusion 114 may be provided on the lower shell 111b, or when the shell of the infusion structure 110 is an integral body, the protrusion 114 is a part of the integral shell, which is not specifically limited here.

[0090] The manner in which the control structure 100 and the infusion structure 110 are assembled to each other includes pressing the control structure 100 onto the infusion structure 110 along the thickness direction of the infusion structure 110 so that the first engaging portion 102 and the second engaging portion 112 engage with each other. Alternatively, the control structure 100 is pressed onto the infusion structure 110 along the length direction of the infusion structure 110. Alternatively, the control structure 100 is pressed along 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 the embodiment of the present invention, the manner in which the control structure 100 and the infusion structure 110 are assembled to each other includes pressing the control structure 100 onto the infusion structure 110 along the thickness direction of the infusion structure 110 so that the first engaging portion 102 and the second engaging portion 112 engage with each other, as shown in FIG. Figure 3b Installation direction shown.

[0091] In the embodiment of the present invention, the lower shell 111b of the infusion structure 110 includes an outward extension 116, and a blocking block 117 is provided on the outer side of the extension 116. Figure 3a As previously described, when the control structure 100 is pressed into 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 of the infusion structure 110, thereby ensuring the normal operation of the infusion device. Obviously, in other embodiments of the present invention, if the control structure 100 is pressed into the engaged position along other directions, the position of the blocking block 117 can be adjusted to similarly prevent the control structure 100 from falling off the infusion structure 110.

[0092] It should be noted that “outward” and “outside” are relative to the main body of the infusion structure 110 and are relative position concepts. Figure 3a or Figure 3b The “outside” in the following text has the same meaning as here.

[0093] In this embodiment of the present invention, a pressing portion 118 is further provided at the outer end of the extension portion 116 for releasing the blocking effect of the blocking block 117. When the user is replacing the infusion structure 110, the user can press the pressing portion 118 with a finger to release the blocking effect of the blocking block 117 on the control structure 100. The user then removes the control structure 100 from the infusion structure 110 using two fingers.

[0094] This embodiment of the present invention may also be provided with an unlocking hole 119. The unlocking hole 119 is disposed on the inner side of the blocking block 117. While pressing the pressing portion 118, the index finger can smoothly enter the unlocking hole 119, thereby ejecting the control structure 100 and separating the control structure 100 from the infusion structure 110. In this embodiment of the present invention, the unlocking hole 119 is square. The square unlocking hole 119 facilitates smooth finger entry. In other embodiments of the present invention, the unlocking hole 119 may also have other shapes, which are not specifically limited here.

[0095] The lower shell 111b of the infusion structure 110 is also provided with a folding groove 140. The folding groove 140 is provided on both sides of the unlocking hole 119. Figure 3c and Figure 3d After the crease groove 140 is set, the thickness or width of the lower shell 111b at the crease groove 140 position (as shown in FIG. Figure 3c and Figure 3d When the user presses the pressing portion 118, the lower shell 111b is easily broken at the crease groove 140, thereby more smoothly releasing the blocking block 117 from blocking the control structure 100.

[0096] Preferably, in the embodiment of the present invention, the crease groove 140 is provided at both ends of the blocking block 117, such as Figure 3c In another embodiment of the present invention, the crease groove 140 is provided on one side of two corresponding sides of the unlocking hole 119, as shown in FIG. Figure 3d shown.

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

[0098] An adhesive patch 120 is also provided at the bottom of the lower shell 111b of the infusion structure 110 for adhering the infusion device to the user's skin surface.

[0099] Figure 4a-4b Schematic diagrams of the three-dimensional structure of the internal structure 130 of the infusion structure 110 according to the embodiment of the present invention are shown from two perspectives. Figure 4c FIG. 1 is a schematic three-dimensional structural diagram of the internal structure 130 of the infusion structure 110 according to another embodiment of the present invention.

[0100] In the embodiment of the present invention, the internal structure 130 includes a mechanical unit and an electronic control unit for completing the infusion function, such as a drug storage cartridge 131, a drug outlet 132, a power supply 133, a driving wheel 134, a screw 135, a circuit board (not shown), and a driving unit 1310. The movement of the driving unit 1310 drives the driving wheel 134 to rotate, thereby driving the screw 135 to push the piston 312 (e.g., Figure 14 as shown) movement to achieve drug infusion.

[0101] In the embodiment of the present invention, the power source 133 is a conventional button battery. In other embodiments of the present invention, the power source 133 may also be other types of batteries, as long as they can meet the conditions for powering the infusion device. Preferably, in the embodiment of the present invention, the power source 133 is a double-row battery, that is, two rows of batteries are respectively arranged on both sides of the driving wheel 134, such as Figure 4b Conventional button batteries have a low discharge capacity. Providing a double row of button batteries can reduce the discharge level of each battery, extending the battery life. Furthermore, the double row design of power supply 133 can fully utilize the internal space of the infusion device and improve the integration of the internal structure of the infusion device.

[0102] The infusion structure 110 in the embodiment of the present invention is also provided with a circuit board or a three-dimensional circuit coated on a portion of the surface of the structure, which is used to supply power to specific structural units. The shape and position of the three-dimensional circuit can be flexibly designed based on the internal structural characteristics of the infusion device, fully utilizing the internal space of the infusion structure and making the structure more compact. The circuit board can be a rigid circuit board or a flexible circuit board. Preferably, in the embodiment of the present invention, the circuit board is a flexible circuit board. The flexible circuit board is shaped in a flexible manner and can be flexibly designed to suit the internal space of the infusion structure 110. Furthermore, the flexible circuit board can be provided with multiple connection terminals that are electrically connected to different second electrical contacts 113, thereby establishing electrical continuity between the control structure 100 and the infusion structure 110, enabling the infusion device to function normally.

[0103] An elastic conductor 136 is further provided inside the infusion structure 130. The elastic conductor 136 is electrically connected to the power source 133 and specific connection terminals on the circuit board (or three-dimensional circuit) respectively, thereby realizing power supply to the specific structural unit.

[0104] Figure 5 FIG. 1 is a schematic diagram of the three-dimensional structure of the elastic conductor 136 according to an embodiment of the present invention.

[0105] In an embodiment of the present invention, the elastic conductor 136 includes a first elastic conductive portion 136a connected to the power supply 133 and a second elastic conductive portion 136b connected to a specific connection end on the circuit board (or three-dimensional circuit). Both the first elastic conductive portion 136a and the second elastic conductive portion 136b are provided with at least one protrusion 1361, which facilitates point contact or line contact connection between the first elastic conductive portion 136a and the power supply 133, and point contact or line contact connection between the second elastic conductive portion 136b and the specific connection end on the circuit board (or three-dimensional circuit), thereby improving the electrical connection reliability between the elastic conductive piece 136 and the power supply 133 and the specific connection end on the circuit board (or three-dimensional circuit). When the elastic conductive piece 136a and the second elastic conductive portion 136b are both flat, it is very likely that the connection between the elastic conductor 136 and the power supply 133 and the specific connection end on the circuit board (or three-dimensional circuit) will be poor during use, thereby affecting the use effect. In an embodiment of the present invention, the protrusion 1361 can be a line protrusion formed by bending the first elastic conductive part 136a or the second elastic conductive part 136b, or it can be a plurality of point-shaped 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 can be the same or different. Here, the form, number and formation method of the protrusion 1361 are not specifically limited, as long as the point contact connection or line contact connection between the elastic conductor 136 and the specific connection end on the power supply 133 and the circuit board (or three-dimensional circuit) can be strengthened to improve the electrical connection reliability.

[0106] In the embodiment of the present invention, the first elastic conductive portion 136a and the second elastic conductive portion 136b are approximately arranged in an "L" shape, 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 present invention, the first elastic conductive portion 136a and the second elastic conductive portion 136b can also be arranged in other shapes, which are not specifically limited here, as long as the power supply 133 can be electrically connected to a specific connection end 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 (such as Figure 5 L) is also provided with an insulating component 1362 to prevent the power component 1311 from contacting the elastic conductor 136 during operation, causing a short circuit and halting operation of the infusion structure 130. In this embodiment of the present invention, the insulating component 1362 is formed of printing ink. In other embodiments of the present invention, the insulating component 1362 may also be insulating glue, insulating varnish, or other insulating materials, without specific limitation herein.

[0107] In an embodiment of the present invention, the elastic conductor 136 can be a metal sheet including a first elastic conductive portion 136a and a second elastic conductive portion 136b, or it can be an integrated body formed by directly or indirectly electrically connecting the first and second elastic conductive portions 136a, 136b via other conductive elements, without limitation. When the elastic conductor 136 is a metal sheet including the first and second elastic conductive portions 136a, 136b, not only is the manufacturing process of the elastic conductor 136 simple, the connection between the first and second elastic conductive portions 136a, 136b is secure, and the volume of the elastic conductor 138 can be reduced, saving material and reducing raw material and production costs. When the elastic conductor 136 is formed by directly or indirectly electrically connecting the first and second elastic conductive portions 136a, 136b via other conductive elements, the elastic conductive portion can be flexibly selected according to the requirements of the specific connecting components, thereby optimizing the internal design of the infusion structure.

[0108] In an embodiment of the present invention, a positioning post 138 is further 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 to the main frame 137. At the same time, the positioning post 138 is melted by hot melting to further fix the elastic conductor 136, thereby preventing the elastic conductor 136 from shaking due to long-term use or other reasons, thereby preventing the elastic conductor 136 from having poor contact with a specific connection end on the power supply 133 or the circuit board (or three-dimensional circuit), thereby affecting use.

[0109] In an embodiment of the present invention, a boss 139 is further provided on the main frame 137. Boss 139 is located below the first elastic conductive portion 136a to prevent the protrusion 1361 of the first elastic conductive portion 136a from being flattened or deformed during long-term use, which could lead to poor contact between the first elastic conductive portion 136a and a specific connection terminal on the circuit board (or three-dimensional circuit), potentially causing a malfunction. Preferably, boss 139 is positioned offset from the projection of protrusion 1361 on the main frame 137 and closer to positioning post 138. This prevents hard contact or pressure between the first elastic conductive portion 136a and the specific connection terminal on the circuit board (or three-dimensional circuit), which could damage the circuit board, while ensuring elastic electrical contact between the first elastic conductive portion 136a and the specific connection terminal on the circuit board (or three-dimensional circuit).

[0110] Similar to the elastic conductive member, the types of elastic conductor 136 include conductive springs, conductive springs, conductive rubber, or conductive silicone, and are not specifically limited herein, as long as they can electrically connect the power source 133 to a specific connection terminal on the circuit board (or three-dimensional circuit). Preferably, in this embodiment of the present invention, the elastic conductor 136 is a conductive spring. Obviously, since the infusion structure 110 has a double-row battery, the elastic conductor 136 is also designed as a double-row structure, as shown in Figure 4a.

[0111] The elastic conductor 136 can realize direct electrical connection between the power source 133 and a specific structural unit, thereby reducing the circuit design inside the structure and reducing 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 a main frame 137. The main frame 137 also includes a rotating shaft 1313. The drive unit 1310 is provided with a through-hole, through which the drive unit 1310 is mounted and secured 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, while the other end is connected to a specific electrical connection on a circuit board or a three-dimensional circuit via a conductive platform 1314, further connecting 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 about the rotating shaft 1313, driving the drive end 1312 forward, thereby pushing the teeth of the drive wheel 134 forward, causing the infusion device to deliver medication. In this embodiment of the present invention, there are two drive ends 1312, corresponding to two power components 1311. In another embodiment of the present invention, the driving end 1312 and the power component 1311 are each one, such as Figure 4c shown.

[0113] A conductive tower spring 1315 is also provided inside the infusion structure 110, which is sleeved on the rotating shaft 1313, with one end abutting the drive unit 1310 and the other end electrically connected to a specific electrical connection end on the circuit board or the three-dimensional circuit, and 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 end on the circuit board or the three-dimensional circuit.

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

[0115] In an embodiment of the present invention, the conductive tower spring 1315 includes a portion A with a small diameter in the center portion in the axial direction, and portions B and C with large diameters at both ends, wherein the diameters of portion A are consistent and are fixed to the rotating shaft 1313 by interference fit, thereby 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, causing the drive end 1312 to push the drive wheel 134 forward, thereby affecting the accuracy of infusion; the diameters of portion B and portion C gradually expand in a trumpet shape toward both ends, and when portion B and portion C are electrically connected to the drive unit 1310 and specific electrical connection ends on the circuit board or three-dimensional circuit respectively, the conductive tower spring 1315 is compressed, so portion B and portion C have multiple turns, and at least 2-3 turns of the spring are in contact with the drive unit 1310 and specific electrical connection ends on the circuit board or three-dimensional circuit at the same time, thereby improving the electrical connection reliability of the infusion device.

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

[0117] Figure 7 for Figure 4a A partial enlarged view of .

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

[0119] Conductive platform 1314 includes a conductive platform body 141 and a conductive arm 142. Conductive arm 142 is a resilient conductive element. Conductive arm 142 is provided with at least one conductive platform protrusion 1421, which facilitates point-contact or line-contact connection with a specific connection terminal on a circuit board (or three-dimensional circuit), thereby improving the reliability of the electrical connection between conductive platform 1314 and the specific connection terminal on the circuit board (or three-dimensional circuit). If the conductive arm of conductive platform 1314 is a planar structure, poor contact between conductive platform 1314 and the specific connection terminal on the circuit board (or three-dimensional circuit) may occur during use, thereby affecting the user experience. In embodiments of the present invention, conductive platform protrusion 1421 can be a linear protrusion formed by bending conductive arm 142, or can be a plurality of point-shaped or other shaped protrusions formed by processing conductive arm 142 through other means. The form, number, and formation method of conductive platform protrusion 1421 are not specifically limited, as long as they can enhance the reliability of the electrical connection between conductive platform 1314 and the specific connection terminal on the circuit board (or three-dimensional circuit). In this embodiment of the present invention, the conductive platform body 141 further includes a conductive platform end portion 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 platform body 141 via die-casting, resulting in a stable connection and high electrical connection reliability. Specifically, the power component 1311 is placed within the folded conductive platform end portion 1411 and then connected to the conductive platform end portion 1411 via die-casting, further enhancing electrical connection reliability.

[0120] In an embodiment of the present invention, the conductive platform 1314 can be a metal sheet comprising a conductive platform body 141 and a conductive arm 142, or the conductive platform body 141 and the conductive arm 142 can be integrated by being directly or indirectly electrically connected via other conductive elements, without limitation. When the conductive platform 1314 is a metal sheet comprising the conductive platform body 141 and the conductive arm 142, not only can the manufacturing process of the conductive platform 1314 be simplified and the connection between the conductive platform body 141 and the conductive arm 142 be secure, but the volume of the conductive platform 1314 can also be reduced, saving materials and reducing raw material and production costs. When the conductive platform 1314 is formed by the conductive platform body 141 and the conductive arm 142 being directly or indirectly electrically connected via other conductive elements, the elastic conductive portion can be flexibly selected according to the requirements of the specific connecting components, thereby 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 directly or indirectly electrically connected through other conductive elements to form an integrated whole, and there is no limitation here. The conductive platform 1314 can be a metal sheet comprising the conductive platform body 141, the conductive arm 142 and the conductive platform body end 1411, or two of them can be metal sheets and then electrically connected to a third party directly or indirectly through other conductive elements to form an integrated whole, or all three can be electrically connected directly or indirectly through other conductive elements to form an integrated whole, and there is no specific limitation here. The benefits of various molding methods are as described above and will not be repeated here. Preferably, in an 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 an embodiment of the present invention, a plurality of blocks 1316 are provided on the main frame 137 for accommodating and limiting the position of the conductive platform 1314. A conductive platform positioning post 1317 is also provided on the main frame 137. An opening adapted for the conductive platform positioning post 1317 is provided on the conductive platform 1314. The conductive platform 1314 is sleeved on the conductive platform positioning post 1317 through the opening, thereby fixing the conductive platform 1314 on the main frame 137. At the same time, the conductive platform positioning post 1317 is melted by hot melting to further fix the conductive platform 1314, thereby preventing the conductive platform 1314 from shaking due to long-term use or other reasons, which may cause poor contact between the conductive platform 1314 and a specific connection end on the circuit board (or three-dimensional circuit), thereby affecting use.

[0123] In an embodiment of the present invention, a conductive platform boss (not shown) is further provided on the main frame 137. The conductive platform boss 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, thereby causing poor connection between the conductive platform 141 and a specific connection terminal on the circuit board (or three-dimensional circuit) and causing a malfunction. Preferably, the conductive platform boss is positioned away from the projection of the conductive platform protrusion 1421 on the main frame 137 and closer to the conductive platform positioning post 1317. This prevents the conductive arm 142 from damaging the specific connection terminal on the circuit board (or three-dimensional circuit) by hard contact or pressure, while ensuring elastic electrical contact between the conductive arm 142 and the specific connection terminal on the circuit board (or three-dimensional circuit).

[0124] Similar to the elastic conductor 136, the types of the conductive platform 1314 include conductive springs, conductive springs, conductive rubber or conductive silicone, etc., and there is no specific restriction here, as long as the conditions for electrically connecting the power component 1310 to the specific connection end on the circuit board (or three-dimensional circuit) are met.

[0125] Figure 8a and Figure 8b 1 and 2 are structural schematic diagrams of the driving wheel assembly and the main frame 17 before and after assembly according to an embodiment of the present invention. Figure 8c FIG. 4 is a schematic diagram of the three-dimensional structure of a 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, and a connector 163 disposed at the end of the drive wheel 161. The connector 163 includes a connecting portion 1631 for operative connection with the movable block 18. The movable block 18 also includes a threaded portion for accommodating the screw 135. The movable block 18 also includes a movable block connecting rod 181 that flexibly connects to the connecting portion 1631. When the connecting rod 181 flexibly connects to the connecting portion 1631, the movable block 18 can rotate about the connecting rod 181, thereby opening or closing the movable block 18. When the movable block 18 is open, the screw 135 can slide toward the drive wheel body 16. When the movable block 18 is closed, the screw 135 cannot slide toward the drive wheel body 16, as will be described in detail below.

[0127] The drive wheel assembly also includes a cover 15, which is provided with a plurality of cover engaging portions 151 for engaging with the main frame 17. The main frame 17 is provided with a main frame groove 171 for accommodating the drive wheel body 16, and is also provided with a plurality of main frame engaging portions 172 for engaging with the cover engaging portions 151. After the drive wheel body 16 and the movable block 18 are connected, they are placed into the main frame groove 171, and then the cover 15 is assembled to the main frame 17. The engagement of the main frame engaging portions 173 and the cover engaging portions 151 secures the drive wheel body 16 and the movable block 18 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 a plurality of interlocking hooks, blocks, holes, and slots. Their positions can be flexibly designed based on the shapes and structures of the main frame 17 and the cover 15, and are not specifically limited herein. Preferably, the structural body formed by the plurality of main frame engaging portions 173 and the plurality of cover engaging portions 151 can precisely accommodate the drive wheel body 16 and the movable block 18, thereby preventing the drive wheel body 16 from shaking.

[0129] In the embodiment of the present invention, the cover 15 is further provided with at least one elastic arm 152 for elastically abutting the drive tube 162, which can further fix the drive wheel body 16, thereby improving the stability of the infusion structure 110 and the accuracy of drug infusion. Preferably, there are two elastic arms 152, which are arranged on both sides of one of the drive wheels 161 and abut the drive tube 162 respectively. Figure 8bAs shown, the driving wheel body 16 is fixed at multiple points.

[0130] The cover 15 is further provided with a baffle 153, which has a groove. The main frame 17 is further provided with a slot 173 on the side near the drug storage cartridge 131 for accommodating 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 confining the drive wheel body 16 and the movable block 18 in the main frame 17. Preferably, the groove of the baffle 153 is semicircular, with a diameter adapted to the diameter of the screw 135, to better accommodate the screw 135 and prevent the screw 135 from shaking significantly under the action of external force.

[0131] Preferably, in the embodiment of the present invention, the cover is an integrally formed structure, which has a simple process, a small volume, a firm connection, saves materials and reduces costs.

[0132] Figure 9a-9d 1 and 2 are schematic cross-sectional and three-dimensional structural diagrams of the movable block 18 in an embodiment of the present invention when the movable block 18 is in an open state and a closed state, respectively.

[0133] The movable block 18 also includes an upper movable block 182 and a lower movable block 183. The lower movable block 183 is further provided with a lower movable block end 1831. When the movable block 18 is open, the upper movable block 182 is positioned close to the drive wheel 161, while the lower movable block 183 is positioned away from the drive wheel 161. The threads within 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 positioned away from the drive wheel 161, while the lower movable block 183 is positioned close to the drive wheel 161. At this point, the threads within 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 present invention, the main frame 17 is further provided with an arcuate stopper 174 for limiting the position of the lower movable block 183. When the movable block 18 is open, that is, when 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 arcuate stopper 174, thereby maintaining the movable block 183 in the open position. At this time, the threads within the movable block 18 are not engaged 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 in the open position, the drug storage cartridge 131 can be filled with drugs. During the process of filling the drug storage cartridge 131, the screw 135, under the driving force generated during the filling process, can smoothly move toward the drive wheel 161 until the filling is completed without the assistance of other components. This simple structure, high integration, cost savings, and a reduced volume of the infusion structure 110 are achieved while maximizing the actual drug storage space of the drug storage cartridge 131.

[0135] When the movable block 18 is closed, that is, the movable block 182 is away from the driving wheel 161 and the lower movable block 183 is close to the driving wheel 161, the lower movable block end 1831 of the lower movable block 183 is located on the inner side of the arc-shaped blocking member 174, and the movable block 18 remains in the closed state. At this time, the thread in the movable block 18 engages with the screw 135, and the screw 135 cannot slide in the movable block 18 and the drive tube 162. When the drug filling is completed and the infusion device 110 implements drug infusion, the driving end 1312 of the drive unit 1310 pushes the drive wheel 161 forward, and the movable block 18 rotates with the drive wheel 161. During the rotation, after the end 1831 of the lower movable block passes by the arc-shaped blocking member 174, since there is no longer any obstruction from the arc-shaped blocking member 174, the end 1831 of the lower movable block 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 in the direction away from the drive wheel 161 under the pushing action generated by the rotation of the drive wheel 161 to carry out drug infusion. There is no need to worry about the screw 135 moving freely due to the failure of the thread engagement between the screw 135 and the movable block 18 or the drive tube 162, which affects the infusion effect or even causes the infusion device to fail.

[0136] In this embodiment of the present invention, a recess 1611 is provided on the end surface of the driving wheel 16 near the drug storage cartridge 131. The recess 1611 is shaped to accommodate the lower movable block 183. When the end 1831 of the lower movable block passes around the arcuate stopper 174 and falls inside the arcuate stopper 174, the lower movable block 183 is accommodated in the recess 1611 of the driving wheel 161, fully utilizing the space in the driving wheel body, optimizing the internal design of the infusion structure, and reducing the volume of the infusion device.

[0137] It should be noted that the terms "inside" and "outside" are relative to the arc-shaped blocking member 174 and are relative position concepts. Figure 9b or Figure 9d shown.

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

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

[0140] A protective film 1202 is provided on the outer edge of the first surface α 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 made of 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 made of polyethylene terephthalate (PET) with a Rockwell hardness of 90-95 HRM.

[0143] The outer edge contour of the protective film 1202 is adapted to the outer edge contour of the tape 1201. Adaptation here means that the outer edge contour size, bending radius, shape and other parameters of the protective film 1202 are consistent with the outer edge contour parameters of the tape 1201, so that every part of the outer edge of the tape 1201 can fit with the protective film 1202.

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

[0145] In another preferred embodiment of the present invention, the protective film 1202 is an annular structure. The hollow structure of the annular structure allows the protective film to be attached to the first surface α of the tape 1201 without interfering with the infusion device. Secondly, the inner edge and outer edge contours of the annular structure protective film are consistent, which is more beautiful and enhances the user experience.

[0146] In the embodiment of the present invention, a first through hole 12011 is formed on the adhesive tape 1201. The position of the first through hole 12011 corresponds to the portion where the infusion needle 121 penetrates the body. Figure 10b As shown, it is used to pass the infusion needle 121 to penetrate the host's skin.

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

[0148] In a preferred embodiment of the present invention, the release paper 1203 is a single silicon release paper, and its peeling force is 30-50 g.

[0149] In the embodiment of the present invention, a second through hole 12031 is opened on the release paper 1203, and 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 penetrate the host skin.

[0150] To facilitate peeling of the release paper 1203 from the adhesive tape 1201 and to save space, the release paper 1203 is preferably comprised of two layers, with the release openings facing inward. The release opening of one layer is bent outward and covered by the release opening of the other layer. As previously described, the adhesive patch 120 comprises, from surface α to surface β, the protective film 1202, the adhesive tape 1201, and the release paper 1203.

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

[0152] In the embodiment of the present invention, the main structural differences between the control structure 200 and the infusion structure 210 and the control structure 100 and the infusion structure 110 in the aforementioned embodiment (as shown in Figures 2 and 3) are 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 a presence detection module 222, which will be described in detail below. The 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 located on the boss 214 of the upper housing 211a of the infusion structure 210. This fully utilizes the internal space of the infusion device and optimizes the circuit structure of the circuit board or three-dimensional circuit. In other embodiments, the second electrical contact 213 and the presence detection module 222 may also be located elsewhere on the infusion structure 210, which is not limited here.

[0154] The presence detection module 222 includes a second physical component 2221, such as a voltage-variable resistor, a magnetic element, an inductor, a capacitor, or the like. Those skilled in the art will appreciate that any combination of these physical components may be used, and the physical components used in the presence detection module 223 are not limited thereto; any other physical component capable of triggering a position signal may be used. The first physical component 223 and the second physical component 2221 are operably electrically connected. "Operably electrically connected" here means that different electrical connection methods may be used depending on the type of the first physical component 223 and the second physical component 2221.

[0155] Figure 12a FIG. 1 is a schematic diagram of a presence detection module including a voltage-variable resistor device according to another embodiment of the present invention.

[0156] In this embodiment of the present invention, the second physical component 2221 of the presence detection module 222 is a pressure-sensitive resistor. Pressure changes applied by an external device can cause a change in the resistance of the resistor. This change can be linear or nonlinear. This principle can be used to detect the secure connection between the control structure 200 and the infusion structure 210.

[0157] The second physical component 2221 is a piezoelectric resistor 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 mounted on the infusion structure, the rigid electrical contact contacts the piezoelectric resistor. Those skilled in the art will appreciate that to form a closed-loop circuit, two rigid electrical contacts are required: a first rigid electrical contact 223a and a second rigid electrical contact 223b.

[0158] In an embodiment of the present invention, when the control structure and the infusion structure are properly connected, the rigid electrical contact points contact the pressure-variable resistor device, generating a base pressure F1. Corresponding to this base pressure, the pressure-variable resistor device generates a base resistance R1. When the connection between the control structure and the infusion structure becomes loose and out of position, the pressure generated by the rigid electrical contact points contacting the pressure-variable resistor device decreases, for example, to F2. Obviously, F2 < F1. The corresponding resistance value of the pressure-variable resistor device becomes R2. If the pressure-variable resistor device is a positive feedback device, then R2 < R1. Conversely, if the pressure-variable resistor device is a negative feedback device, then R2 > R1. When the connection between the control structure and the infusion structure becomes tighter, the pressure generated by the rigid electrical contact points contacting the pressure-variable resistor device increases, for example, to F3. Obviously, F3 > F1. The corresponding resistance value of the pressure-variable resistor device becomes R3. If the pressure-variable resistor device is a positive feedback device, then R3 > R1. Conversely, if the pressure-variable resistor device is a negative feedback device, then R3 < R1.

[0159] Regardless of whether the voltage-variable resistor device is a positive feedback device or a negative feedback device, there is a unique corresponding relationship between its resistance value and the pressure it is subjected to, and the pressure it is subjected to is positively correlated with the firmness of the combination of the control structure and the infusion structure. Therefore, the resistance value of the voltage-variable resistor device indirectly represents the firmness of the combination of the control structure and the infusion structure.

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

[0161] In a preferred embodiment of the present invention, the voltage-variable resistor device is a voltage-variable resistor conductive rubber strip. The voltage-variable resistor conductive rubber 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 FIG. 1 is a schematic diagram of a presence detection module including a magnetic component according to another embodiment of the present invention.

[0163] In this embodiment of the present invention, the second physical component 3221 of the presence detection module is a magnetic element that provides a stable magnetic field. The magnetic element exhibits different magnetic field directions and intensities at different effective distances. This principle can be used to detect the secure connection between the control structure and the infusion structure.

[0164] Second physical component 3221 is a magnetic component, and correspondingly, first physical component 323 on the infusion structure is a magnetic sensing element. When the control structure is mounted on the infusion structure, the magnetic sensing element senses the direction or intensity of the magnetic field of the magnetic component, or both. The sensed magnetic field direction or intensity 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 an embodiment of the present invention, when the infusion structure and the control structure are properly connected, the distance between the magnetic sensing element and the magnetic component is O1, and the magnetic sensing element senses a base magnetic field strength of H1. When the connection between the infusion structure and the control structure becomes loose and out of position, the distance between the magnetic sensing element and the magnetic component increases, for example, to O2, where O2 > O1, and the magnetic field strength sensed by the magnetic component becomes H2, where H2 < H1. When the connection between the infusion structure and the control structure becomes tighter, the distance between the magnetic sensing element and the magnetic component decreases, for example, to O3, where O3 < O1, and the magnetic field strength sensed by the magnetic component becomes H3, where H3 > H1.

[0166] Regardless of how the distance O between the magnetic sensing element and the magnetic part changes, there is a unique corresponding relationship between the distance O and the magnetic field strength H. The distance between the magnetic sensing element and the magnetic part is related to the firmness of the combination of the infusion structure and the control structure. Therefore, the magnetic field strength H of the magnetic part sensed by the magnetic sensing element indirectly represents the firmness of the combination of the infusion structure and the control structure.

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

[0168] Figure 12c FIG. 1 is a schematic diagram of a presence detection module including an inductive coil according to another embodiment of the present invention.

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

[0170]

[0171] Where,

[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 of the inductor coil.

[0175] For the same inductor coil, its diameter D and number of turns N remain constant, but its length l can change with the squeezing or stretching force 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 4221a and a conductive boss 4221b. The conductive boss 4221b is located on the boss 411 and is electrically connected to the inductor 4221a. Correspondingly, the first physical component 423 of the infusion structure includes a pressing member 423a that contacts one end of the inductor and an elastic electrical contact 423b that is electrically connected to the other end of the inductor via the conductive boss 3142b. Those skilled in the art will appreciate that, in order to obtain the inductance value L of the inductor, the conductive boss 4221b, pressing member 423a, and elastic electrical contact 423b are all made of conductive materials.

[0177] In this embodiment of the present invention, when the infusion structure and the control structure are properly 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, allowing the internal circuit within the infusion structure to obtain the inductor coil's inductance value, L. At this point, 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, the inductor coil's base inductance value is L1. When the connection between the infusion structure and the control structure becomes loose and out of position, the distance between the infusion structure and the control structure becomes s2, and the pressing member 423a moves with the infusion structure, causing the length of the inductor coil to become l2. With s2 > s1 and l2 > l1, the inductance value of the inductor coil now becomes L2, and L2 < L1. When the connection between the infusion structure and the control structure is tightened, the distance between them becomes s3. The pressing member 423a moves with the infusion structure, and the length of the inductor coil becomes l3. S3 < s1, l3 > l1. At this point, the inductor coil's inductance becomes L3, clearly L3 > L1. Regardless of how the distance between the infusion structure and the control structure changes, the elastic electrical contact 423b, made of an elastic material, maintains good electrical contact with the inductor coil unless the infusion structure is completely separated from the control structure.

[0178] Regardless of how the length l of the inductor coil changes, there is a unique corresponding relationship between the length l and the inductance value L, and the length l of the inductor coil is related to the firmness of the combination of the infusion structure and the control structure. Therefore, the inductance value L of the inductor coil indirectly represents the firmness of the combination of the infusion 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 calculated by a relevant algorithm, and then wirelessly transmitted by the control structure 200 to a remote device, such as a PDM (Personal Diabetes Manager), a mobile terminal, etc., so that the user can understand the installation tightness of the infusion structure in real time.

[0180] Figure 12d FIG. 1 is a schematic diagram of a presence detection module including a lower plate of a capacitor according to another embodiment of the present invention.

[0181] In an embodiment of the present invention, the second physical component 5221 of the presence detection module includes a lower plate of a capacitor. Correspondingly, the first physical component 523 includes an upper plate 523a and an elastic electrical contact 523b of the capacitor. The upper plate 523a and the lower plate are combined to form a complete capacitor. The elastic electrical contact 523b is used to make electrical contact with the lower plate 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] Where: ε is a constant;

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

[0185] k is the electrostatic force 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 force constant ε are fixed and do not change. However, the distance d between the upper and lower plates can vary with the firmness of the connection between the infusion structure and the control structure. When this distance d changes, the capacitance value C also changes. This principle can be used to detect the firmness of the connection between the infusion structure and the control structure.

[0188] As previously described, first physical component 523 includes an upper plate 523a and a resilient electrical contact 523b of the capacitor. The upper plate 523a and the lower plate together form a complete capacitor, and the resilient electrical contact 523b is configured to electrically contact the lower plate, forming a closed circuit. Those skilled in the art will appreciate that, in order to obtain the capacitance value, the resilient electrical contact 523b is made of a conductive material.

[0189] In an embodiment of the present invention, when the infusion structure and the control structure are properly connected, the upper plate 523a and the lower plate form a capacitor. The elastic electrical contact 523b contacts the lower plate, providing the lower plate with a charge opposite to that of the upper plate 523a. At this point, the distance between the upper plate 523a and the lower plate is d1. Corresponding to this distance, the capacitance of the capacitor is C1. When the connection between the infusion structure and the control structure becomes loose and out of position, the distance between the infusion structure and the control structure changes to d2, where d2 > d1. At this point, the capacitance of the capacitor becomes C2, and C2 < C1. Clearly, C2 < C1. When the connection between the infusion structure and the control structure becomes tighter, the distance between the infusion structure and the control structure changes to d3, where d3 < d1. At this point, the capacitance of the capacitor becomes C3, and C3 > C1. Regardless of how the distance between the infusion structure and the control structure changes, because the elastic electrical contact 523b is made of an elastic material, it can maintain good electrical contact with the inductor coil unless the infusion structure is completely separated from the control structure.

[0190] No matter how the distance d between the upper and lower plates of the capacitor changes, there is a unique corresponding relationship between the distance d and the capacitance value C. The distance d between the upper and lower plates is related to the firmness of the combination of the infusion structure and the control structure. Therefore, the capacitance value C of the capacitor indirectly represents the firmness of the combination of 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 of the infusion structure and the control structure after being calculated by a relevant algorithm, and then wirelessly transmitted by the control structure 200 to a remote device, such as a PDM (Personal Diabetes Manager), a mobile terminal, etc., so that the user can understand the installation tightness of the infusion structure in real time.

[0192] In the above embodiment, the internal circuit of the control structure 200 is further provided with a signal threshold range indicating that the control structure is in a normal position. Figure 13 Figure 1 is a schematic diagram of the threshold range for a normal in-place signal. The in-place detection module may be a voltage-variable resistor, an inductor, a magnetic component, or a capacitor, or a combination thereof. The relationship between the parameter signal and the bond strength between the infusion structure and the control structure may be linear or nonlinear, with either positive or negative feedback. Regardless of the relationship, the parameter signal and the bond strength between the infusion structure and the control structure are uniquely correlated. Therefore, the parameter signal has a unique maximum threshold and a unique minimum threshold. The interval between these maximum and minimum thresholds represents the normal in-place threshold range, within which the control structure is properly secured to the infusion structure.

[0193] If the parameter signal exceeds the normal in-place threshold range, it indicates that the control structure has loosened, or the control structure is too tightly combined with the infusion structure due to external compression. At this time, the internal circuit of the control structure sends an alarm signal, prompting the user to press the control structure, or 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 expressed as one or a combination of light signals, vibration signals, and sound signals.

[0195] Figure 14 FIG. 1 is a schematic diagram of the internal structure of an infusion structure including a blockage detection module according to an embodiment of the present invention.

[0196] In an embodiment of the present invention, the infusion device is also provided with a blockage detection module, operably connected to the control structure, for sensing and measuring relevant physical parameters during the drug filling or infusion process to confirm whether a blockage has occurred. The blockage detection module includes a detection circuit (not shown) 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 corresponding signals, data, or information required for analysis and processing for the purpose of blockage detection. The detection circuit also stores preset thresholds for various relevant physical parameters and a comparator for comparing the sensed relevant physical parameters with the preset thresholds. When the sensed relevant physical parameters are greater than or less than the corresponding preset thresholds, the detection circuit issues an alarm signal, alerting the user to a blockage, stopping the infusion, replacing the infusion structure, or performing 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. Preferably, the power component 313 is an electrically driven linear actuator or an electrically heated linear actuator, such as a shape memory alloy. The detection circuit is provided with a timer to record the time it takes for the power component 313 to pull the driving end 314, thereby driving the driving wheel 315 to rotate, thereby pushing the piston 312 forward one step. When the time it takes 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 present invention, the detection element 311 is a component other than the infusion device itself, such as one or more of a force sensor, an acceleration sensor, and a position detection element. Figure 14As shown, the detection element 311 is arranged in the storage piston 312. In other embodiments of the present invention, the detection element 311 can also be arranged in other components of the infusion structure 310, such as the screw 316, one or more connections between the screw 316 and the piston 312, etc., which is not limited here and can be flexibly arranged 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, the force sensor is a tension sensor. During the process of drug injection or infusion, the tension sensor is used to sense the magnitude of the force applied by the power component 313 to the screw 316 or the piston 312. When the sensed force is greater than a preset threshold, the detection circuit sends 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, the force sensor is a pressure sensor. During the process of drug injection or infusion, the pressure sensor senses and measures the pressure applied by the piston to the drug. When the sensed pressure is greater than a preset threshold, the detection circuit sends 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 process of drug injection or infusion, the acceleration sensor can sense and measure the speed or acceleration of the screw 315 or the piston 312 moving in the drug storage cartridge 313. The detection circuit converts it into a change value of speed and acceleration per unit time. When the detected change value is less than a preset threshold, the detection circuit sends 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 process of drug injection or infusion, the axial (along the direction of movement of the screw 136) position change of the piston 312 or the end of the screw 136 in the drug storage cartridge 317 is detected by the position detection element. The detection circuit converts the axial position information of the end of the piston 312 or the screw 136 in unit time into the speed or acceleration of the end of the piston 312 or the screw 136 in the drug storage cartridge 317, and further calculates the change value of the speed or acceleration of the end of the piston 312 or the screw 136. When the change value is less than a preset threshold value, the detection circuit sends an alarm signal to remind the user that a blockage has occurred.

[0203] Preferably, in an embodiment of the present invention, the position detection element detects the position of the end of the piston 312 or the screw 136 by a non-contact detection method. The position detection element is a magnetic element for providing a magnetic field. A magnetic sensing element is provided in the detection circuit. The magnetic field strength induced by the magnetic sensing element will change with the position change of the magnetic element, that is, the end of the piston 312 or the screw 136. Therefore, through the induced magnetic field change, the detection circuit can calculate the position change of the end of the piston 312 or the screw 136, as described above, and further detect whether blockage occurs.

[0204] Preferably, in an embodiment of the present invention, the detection element 311 is arranged in the piston 312, and at least one recess 3121 is provided in the piston 312 for accommodating the detection element 311. A plurality of protrusions 3122 are also provided on the inner side of the recess 3121 for fixing the detection element 311. A positioning portion 3123 is also provided in the middle of the recess 3121 to further fix the detection element 311 and prevent the detection element 311 from shaking, which may cause deviations in the sensing information and affect the detection results.

[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, the alarm signal can be designed to be one or a combination of light signals, vibration signals, and sound signals. Different forms of signal presentation make it easier for users to obtain alarm signals in a timely manner according to their needs and take corresponding measures to enhance user experience.

[0207] Figure 15a FIG. 4 is an exploded view of an infusion structure 410 according to an embodiment of the present invention. Figure 15b FIG. 4 is a schematic structural diagram of a lower shell according to an embodiment of the present invention. Figure 15c Schematic diagram of the structure of the main frame according to one embodiment of the present invention.

[0208] The infusion structure 410 comprises an upper shell 411, a lower shell 412 and a main frame 417 arranged between the upper shell 411 and the lower shell 412. The upper shell 411 is provided with a plurality of upper shell first clamping portions 4111 and upper shell second clamping portions 4112, the lower shell 412 is provided with a plurality of lower shell first clamping portions 4121 and lower shell second clamping portions 4122, and the main frame 417 is provided with a main frame first clamping portion 4171 which simultaneously clamps the upper shell first clamping portions 4111 and the lower shell first clamping portions 4121, thereby increasing the stability of the longitudinal clamping of the main frame 417 with the upper shell 411 and the lower shell 412 and reducing the complexity of the clamping design. The upper shell second clamping portions 4112 and the lower shell second clamping portions 4122 clamp the side edges of the main frame, thereby preventing the main frame 417 from moving laterally after clamping and increasing the stability of the lateral clamping of the main frame 417 with the upper shell 411 and the lower shell 412. Here, "longitudinal" refers to the thickness direction of the infusion device, and "lateral" refers to the length direction of the infusion device, as shown. Figure 3a The clamping portions each comprise one or more of a clamping hook, a clamping block, a clamping hole and a clamping slot which can be clamped with each other, and the positions thereof can be flexibly designed according to the shape and structure of the upper shell 411, the lower shell 412 and the main frame 417, which are not specifically limited herein as long as the lateral and longitudinal clamping stability of the upper shell 411, the lower shell 412 and the main frame 417 can be achieved.

[0209] The lower shell 412 is provided with a circuit board for supplying power to specific structural units, and the circuit board can be a rigid circuit board or a flexible circuit board. Preferably, in the embodiment of the present application, the circuit board is a flexible circuit board. The flexible circuit board is shapeable and can be flexibly designed in shape according to the internal space of the infusion structure 410. Meanwhile, a plurality of connection terminals can be arranged on the flexible circuit board and electrically connected with the electrical connection terminals on the main frame 417, thereby optimizing the circuit structure and realizing the conduction of the circuit inside the infusion structure 410 and improving the electrical connection stability of the structures.

[0210] The main frame 417 is used for bearing the structures inside the infusion structure 410. Here, the side of the main frame 417 facing the upper shell 411 is the upper side, the side facing the lower shell 412 is the lower side, the side for accommodating the cartridge with the opening end of the cartridge as the boundary is the right side, and the other side is the left side. It should be noted that "upper side", "lower side", "left side" and "right side" are relative positional concepts, and the positional relationship is as shown in Figure 15aA cartridge accommodating cavity is provided on the right side of the main frame 417 for accommodating the cartridge. The cavity has a shape adapted to the cartridge. A plurality of protrusions 4173 are provided on the lower side of the main frame 417 for supporting the cartridge. A plurality of second main frame engaging portions 4172 are also provided on the right side of the main frame 417. A plurality of cartridge engaging portions (not shown) are provided on the outside of the cartridge to engage with the second main frame engaging portions 4172, thereby stably connecting the cartridge and the main frame 417.

[0211] The driving wheel assembly and power supply are located on the left side of the upper side of the main frame 417. The power supply is a double-row battery, which is located on both sides of the driving wheel assembly. The electrical connection elements in the infusion structure 410 are all located on the left side of the lower side of the main frame 417. The power supply supplies power to the components connected to the circuit board through an approximately "L"-shaped elastic conductive member, thus achieving circuit conduction within the infusion structure 410. Figure 4a and Figure 4c As shown, the main frame 417 is provided with a plurality of positioning posts 138 of the elastic conductor 136, the position of which is adapted to the position of the power supply, for fixing the elastic conductor 136; the main frame 417 is also provided with through holes 4174 (such as Figure 15a As shown), the elastic conductor 136 realizes the 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 realizing power supply to various components; a rotating shaft 1315 is also provided for sleeve-mounting the drive unit 1310 and providing a fulcrum for the rotation of the drive unit 1310, and is arranged between the drive wheels 134; a conductive retaining wall 1318 is also provided at the end of the drive unit 1310 for defining the end point of the movement of the drive unit; a conductive tower spring 1315 is also provided on the drive unit 1310 for connecting the drive unit 1310 and the circuit board, The conductive tower spring 1315 is small in the middle and large at both ends, which can improve the stability of the electrical connection with the circuit board while fixing the drive unit 1310; a plurality of positioning platforms 1319 for the power components 1311 are also provided between the conductive platform 1314 and the elastic conductor 1316, so that the power components 1311 can only be arranged along the linear position defined between the positioning platforms 1319, preventing the power components 1311 from touching other conductive elements and causing a short circuit, thereby rendering the infusion device ineffective; a conductive platform positioning column 1317 and a stopper 1316 are also provided at the end for fixing the conductive platform 134, such as Figure 7 As shown. The specific structures of each component are as described above and will not be described again here. Through the arrangement of the main frame 417, each component of the infusion structure 410 can be integrated on the main frame 417, fully utilizing the internal space of the infusion structure 410, improving the integration of the internal structure, and effectively reducing the volume of the infusion structure 410. At the same time, the structural stability and electrical connection stability of each component can be ensured, thereby improving the reliability of the electrical connection of the internal structure of the infusion structure 410.

[0212] In the embodiment of the present application, the main frame 417 can be an integral injection molding piece including its upper side, lower side, left side and right side structure, or can be integrated by splicing each structure, such as splicing a partially integrated injection molding piece with other structures to form, or splicing each structure to form. The interior of each structure can also be selected as an integral piece or integrated by splicing according to actual needs, which is not specifically limited here. When the main frame 417 is an integral piece, the process is simple, the volume is small, the connection is firm, the material is saved, and the cost is reduced; when the main frame 417 is integrated by splicing, it can be flexibly selected according to the requirements of the components to be carried by the main frame, and the internal design of the infusion structure is optimized.

[0213] In summary, the present application discloses a patch type drug infusion device, the drive wheel assembly of the infusion structure is provided with an activity block, when the activity block is in the open state, the screw rod is not engaged with the drive wheel assembly, the screw rod can slide in the drive wheel assembly, and the infusion can be completed by using the thrust generated during the infusion process, without the assistance of other components, the structure is simple, the cost is low, the volume of the infusion device is small; when the activity block is in the closed state, the screw rod is engaged with the drive rod, and the screw rod can only slide under the pushing action generated by the rotation of the drive wheel and cannot slide freely, the infusion effect is good, and the user experience is high.

[0214] Although some specific embodiments of the present application have been described in detail through examples, those skilled in the art should understand that the above examples are only for illustration, not for limiting the scope of the present application. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. A patch-type drug infusion device, characterized in that: include: An infusion structure, comprising: The drug storage cartridge is used to contain the drug to be infused, and is internally provided with a screw and a piston connected to the screw; a driving wheel assembly, threadedly connected to the screw, the driving wheel assembly comprising a driving wheel body and a movable block, the driving wheel body and the movable block being operably connected, the screw not being engaged with the driving wheel assembly when the movable block is in an open state, and being engaged with the driving wheel assembly when the movable block is in a closed state; a control structure, the control structure and the infusion structure being a separate structure, the control structure being reusable, and the control structure being electrically connected to the infusion structure; and an adhesive patch for adhering the control structure and the infusion structure to the skin surface; The infusion structure further includes a housing, the housing including an upper housing and a lower housing, the lower housing being provided with an outwardly extending portion, a blocking block and a pressing portion being provided on the outer side of the extending portion, and an unlocking hole being provided on the inner side of the blocking block. When pressing the pressing portion, the user's index finger can smoothly enter the unlocking hole, thereby ejecting the control structure, thereby separating 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 reduced.

2. The patch-type drug infusion device according to claim 1, characterized in that: The infusion device also includes a main frame for supporting the various components of the infusion structure. An arc-shaped blocking member is provided on the main frame. When the movable block is located on the outside of the arc-shaped blocking member, the movable block is in an open state; when the movable block is located on the inside of the arc-shaped blocking member, the movable block is in a closed state.

3. The patch-type drug infusion device according to claim 2, characterized in that: The driving wheel assembly further comprises a cover, wherein the cover is provided with a plurality of cover engaging portions, and the main frame is provided with a plurality of main frame engaging portions engaged with the plurality of cover engaging portions.

4. The patch-type drug infusion device according to claim 3, characterized in that: The cover is further provided with at least one elastic arm for abutting against the driving wheel body.

5. The patch-type drug infusion device according to claim 4, characterized in that: The main frame is also provided with a card slot, and a stop bar is provided in the card slot.

6. The patch-type drug infusion device according to claim 5, characterized in that: The cover is further provided with a blocking piece, which is provided with a groove. The blocking bar abuts against the blocking piece to form a through hole for accommodating the screw.

7. The patch-type drug infusion device according to claim 6, characterized in that: The cover is an integral injection molded part.

8. The patch-type drug infusion device according to claim 2, characterized in that: The movable block includes an upper movable block and a lower movable block, the lower movable block includes a lower movable block end portion, and the arc-shaped blocking member defines the position of the lower movable block through the lower movable block end portion.

9. The patch-type drug infusion device according to claim 8, characterized in that: The driving wheel body is provided with a notch, the shape of which is adapted to the lower movable block and is used to accommodate the lower movable block.

10. The patch-type drug infusion device according to claim 1, characterized in that: The movable block is provided with a connecting rod, and is movably connected to the driving wheel body through the connecting rod.

11. The patch-type drug infusion device according to claim 1, characterized in that: 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 to the first electrical contacts.

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

13. The patch-type drug infusion device according to claim 1, characterized in that: The adhesive patch includes a tape and a protective film, the first side of the tape is fixedly connected to the infusion structure, and the second side opposite to the first side of the tape is coated with an adhesive material; the protective film is fixed around the outer edge of the first side of the tape, the outer edge contour of the protective film is adapted to the outer edge contour of the tape, and the Rockwell hardness of the protective film is higher than that of the tape.

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