Drug infusion device without half-press

Abstract

The invention discloses a drug infusion device without half-pressing, comprising: a drug storage barrel for containing drugs, a piston and a screw being arranged in the drug storage barrel; a driving wheel connected to the screw, and driving the piston forward by rotating the driving screw; an infusion needle unit, the infusion needle unit comprising an infusion needle and a needle seat, the needle seat being used to fix the infusion needle, the infusion needle unit being in a middle position when leaving the factory, and the infusion needle being connected to the drug storage barrel; an adhesive patch for sticking the infusion device to the skin surface; and a safety base being arranged below the adhesive patch, an infusion needle accommodating portion being arranged on the safety base, and the infusion needle accommodating portion being waterproof and breathable. The infusion needle unit of the drug infusion device is in a middle position when leaving the factory, and the user does not need to half-press the needle seat to the middle position before performing subsequent operations, thereby reducing the user's operation steps, and the filling can be completed during the drug filling process, thereby avoiding the waiting for filling, shortening the user's operation time, and greatly improving the user experience.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefits of and priority to the following patent applications: PCT application filed on September 10, 2021, with application number PCT / CN2021 / 117647, PCT application filed on August 6, 2021, with application number PCT / CN2021 / 111219, and PCT application filed on December 9, 2021, with application number PCT / CN2021 / 136632. Technical Field

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

[0004] The pancreas in a normal person's body can automatically monitor the glucose content in the human blood and automatically secrete the required insulin / glucagon. However, the pancreas of diabetic patients has abnormal function and cannot normally secrete the insulin required by the human body. Therefore, diabetes is a metabolic disease caused by abnormal pancreatic function in the human body, and diabetes is a lifelong disease. At present, medical technology cannot cure diabetes, and can only control the occurrence and development of diabetes and its complications by stabilizing blood sugar.

[0005] A drug infusion device is a medical device that continuously injects drugs into the patient's body to achieve the purpose of disease treatment. Drug infusion devices are widely used in the treatment of diabetes. They continuously infuse insulin into the patient's subcutaneous tissue according to the dosage required by the human body to simulate the secretion function of the pancreas and maintain the patient's blood sugar stability. The drug fluid is usually stored inside the infusion pump body. Existing drug infusion devices usually stick the pump body directly to the patient's body with medical tape, and the patient operates the remote device for infusion.

[0006] When the existing drug infusion device leaves the factory, the infusion needle is in the initial position. When the user gets the drug infusion device and completes the drug injection, he needs to half-press the needle seat to the middle state and then perform subsequent operations. The operation process is cumbersome and the user experience is not good.

[0007] Therefore, the prior art urgently needs a drug infusion device with good user experience and no need for half-pressing. Summary of the invention

[0008] The present invention discloses a drug infusion device without half-pressing. The drug infusion device is provided with a safety base, and an infusion needle accommodating portion is provided on the safety base. The infusion needle accommodating portion is waterproof and breathable, so that the infusion needle unit of the drug infusion device is in a middle position when leaving the factory. The user does not need to half-press the needle seat to the middle position first to perform subsequent operations, thereby reducing the user's operating steps and improving the user experience.

[0009] The invention discloses a drug infusion device without half-pressing, comprising: a drug storage cartridge for containing drugs, wherein a piston and a screw are arranged in the drug storage cartridge; a driving wheel connected to the screw, and driving the screw by rotating to push the piston forward; an infusion needle unit, wherein the infusion needle unit comprises an infusion needle and a needle seat, wherein the needle seat is used to fix the infusion needle, and the infusion needle unit is in a middle position when leaving the factory, and the infusion needle is connected with the drug storage cartridge; an adhesive patch, wherein the infusion device is adhered to the skin surface; and a safety base, which is arranged below the adhesive patch, wherein an infusion needle accommodating portion is arranged on the safety base, and the infusion needle accommodating portion has waterproof and breathable properties.

[0010] According to one aspect of the present invention, a safety base includes a safety base body, an elastic sealing member and a waterproof breathable membrane.

[0011] According to one aspect of the present invention, the safety base body and the elastic sealing member are integrally formed by injection molding.

[0012] According to one aspect of the present invention, the safety base body and the elastic seal are interference fit.

[0013] According to one aspect of the present invention, the safety base body and the waterproof breathable membrane are connected by ultrasonic welding or waterproof double-sided tape.

[0014] According to one aspect of the present invention, the safety base is a hollow elastic sealing body, and at least one side of the elastic sealing body is provided with a plurality of dense micro holes.

[0015] According to one aspect of the present invention, the thickness of the safety base gradually decreases from one end close to the adhesive patch toward the middle portion, forming a plane with the other end of the adhesive patch.

[0016] According to one aspect of the present invention, the thickness of the safety base is uniform.

[0017] According to one aspect of the present invention, the adhesive patch includes at least one layer of adhesive tape and a protective film, wherein the protective film is fixed around the outer edge of the at least one layer of adhesive tape.

[0018] According to one aspect of the present invention, the sexual patch comprises at least two layers of adhesive tape.

[0019] According to one aspect of the present invention, the adhesive patch further comprises at least one protective film.

[0020] According to one aspect of the present invention, the protective film has a higher Rockwell hardness than the adhesive tape.

[0021] According to one aspect of the present invention, the adhesive patch includes an adhesive tape and a release paper, and the surface of the adhesive tape is also provided with dense air holes.

[0022] According to one aspect of the present invention, a third through hole is further provided on the safety base.

[0023] According to one aspect of the present invention, the third through hole is a tapered hole.

[0024] According to one aspect of the present invention, an infusion device includes an infusion structure and a control structure, and a drug storage cartridge, a driving wheel, and an infusion needle unit are disposed on the infusion structure.

[0025] According to one aspect of the present invention, the infusion structure and the control structure are separate structures, and the control structure can be reused.

[0026] According to one aspect of the invention, the infusion structure and the control structure are electrically connected via a plurality of electrical contacts.

[0027] According to one aspect of the present invention, the infusion structure and the control structure are an integrated structure and are discarded as a whole after use.

[0028] Compared with the prior art, the technical solution of the present invention has the following advantages:

[0029] In the half-press-free drug infusion device disclosed by the present invention, a safety base is provided, which includes an infusion needle accommodating portion. The infusion needle accommodating portion is waterproof and breathable, so that the drug infusion device is in the middle position when leaving the factory. The user does not need to half-press the needle seat to the middle position before performing subsequent operations, which reduces the user's use operation steps, and the filling can be completed during the drug filling process, avoiding the filling waiting, shortening the user's operation waiting time, and greatly improving the user experience.

[0030] Furthermore, the infusion needle accommodating portion is composed of a safety base body, an elastic seal and a waterproof breathable membrane. The safety base body and the elastic seal can be integrally formed by injection molding or interference fit, and the waterproof breathable membrane and the safety base body can be connected by laser welding or waterproof double-sided tape. The process is simple, the production is convenient, and the production cost is reduced.

[0031] Furthermore, the safety base is a hollow elastic sealing body, the hollow part of which constitutes the infusion needle accommodating part, and at least one side of the elastic sealing body is provided with a plurality of dense micro holes for waterproof and breathable. The structure is simple and the waterproof and breathable effect is good.

[0032] Furthermore, the adhesive patch also includes adhesive tape and release paper. The surface of the adhesive tape is provided with evenly arranged dense air holes, which makes the adhesive tape breathable and can help the water vapor and sweat secreted by the patient's skin at the adhesion site to be discharged, thereby preventing the water vapor and sweat from soaking into the skin and causing wrinkles on the patient's skin.

[0033] Furthermore, the adhesive patch includes an adhesive tape and a protective film. The protective film can prevent or delay curling or warping of the edge of the adhesive tape, thereby preventing the infusion device from being displaced or falling off, affecting the user experience.

[0034] Furthermore, the adhesive patch includes at least two layers of adhesive tape, and through the relay effect of the adhesive tape, the infusion device can be adhered to the host skin surface for a long time, thereby extending the use time of the infusion device.

[0035] Furthermore, a conical hole is also provided on the safety base to facilitate guiding the external drug injection device to inject the drug into the drug storage cartridge. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1a-1b are top views of drug infusion systems according to two different embodiments of the present invention;

[0037] Figure 2a-2b is a schematic diagram of a three-dimensional structure of a control structure according to an embodiment of the present invention;

[0038] Figure 3a is a schematic diagram of the three-dimensional structure of an infusion structure according to an embodiment of the present invention;

[0039] 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;

[0040] Figure 3c It is a schematic diagram of a top view of the lower shell of the infusion structure part according to one embodiment of the present invention;

[0041] Figure 3d is a schematic diagram of a top view of the lower shell of the infusion structure part according to another embodiment of the present invention;

[0042] Figure 4a-4b They are three-dimensional structural schematic diagrams of the internal structure of an infusion structure according to one embodiment of the present invention from two perspectives;

[0043] Figure 4c is a three-dimensional structural schematic diagram of the internal structure of an infusion structure according to another embodiment of the present invention;

[0044] Figure 5 is a schematic diagram of a three-dimensional structure of an elastic conductor according to an embodiment of the present invention;

[0045] Figure 6 is a schematic diagram of a three-dimensional structure of a conductive spring according to an embodiment of the present invention;

[0046] Figure 7 for Figure 4a A local magnified view of the M region;

[0047] Figure 8a and Figure 8b They are schematic structural diagrams of the driving wheel assembly and the main frame before and after assembly according to an embodiment of the present invention;

[0048] Figure 8c is a schematic diagram of a three-dimensional structure of a cover according to an embodiment of the present invention;

[0049] Figure 9a-9d Schematic diagram of the cross-section structure and the schematic diagram of 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;

[0050] Figure 10a-Figure 10e 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, and schematic diagram of the structure of the layers of an adhesive patch including multiple layers of adhesive tape and a protective film and schematic diagram of the stacking sequence;

[0051] Fig.11a is a schematic diagram of the three-dimensional structure of an infusion device according to another embodiment of the present invention;

[0052] Fig.11b is a schematic structural diagram of an infusion needle unit according to an embodiment of the present invention;

[0053] Fig.11c It is a schematic diagram of the structure of the drug storage cartridge and the cavity according to an embodiment of the present invention;

[0054] Fig.11d is a schematic structural diagram of a safety base according to an embodiment of the present invention;

[0055] Fig.11e and Fig.11f Schematic diagram of the cross-sectional structure of a safety base according to other embodiments of the present invention. DETAILED DESCRIPTION

[0056] As mentioned above, when the drug infusion device leaves the factory, the infusion needle is in the initial position. After the user gets the drug infusion device and completes the drug injection, he needs to half-press the needle seat to the middle state and then perform subsequent operations. The operation process is cumbersome and the user experience is not good.

[0057] In order to solve this problem, the present invention provides a half-press-free drug infusion device, which is provided with a safety base. The safety base includes an infusion needle accommodating portion. The infusion needle accommodating portion is waterproof and breathable, so that the drug infusion device is in a middle position when leaving the factory. The user does not need to half-press the needle seat to the middle position before performing subsequent operations, thereby reducing the user's operating steps and improving the user experience.

[0058] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be understood that 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 unless otherwise specifically stated.

[0059] 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 proportions. For example, the thickness, width, length or distance of certain units may be enlarged relative to other structures.

[0060] The following description of the exemplary embodiments is merely illustrative and is not intended to limit the present invention and its application or use in any sense. Techniques, methods and devices known to ordinary technicians in the relevant field may not be discussed in detail here, but where applicable, these techniques, methods and devices should be considered as part of this specification.

[0061] It should be noted that like reference numerals and letters denote similar items in the following figures, and thus, once an item is defined or described in one figure, it will not require further discussion in the subsequent figure descriptions.

[0062] Figure 1a-1b 1 and 2 are top views of drug infusion devices according to two different embodiments of the present invention.

[0063] The patch-type drug infusion device of the embodiment of the present invention comprises two parts: a control structure 100, an infusion structure 110 and an adhesive patch 120. These structures will be described below. In other embodiments of the present invention, the patch-type drug infusion device may also comprise more parts, which are not specifically limited here.

[0064] The patch-type drug infusion device refers to an infusion device without a long catheter, and the infusion device is entirely attached to the user's skin surface with a single adhesive patch 120, and 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.

[0065] In the embodiment of the present invention, the control structure 100 and the infusion structure 110 are of split design, and the two are connected by a waterproof plug or directly snapped and electrically connected to form a whole. When the control structure 100 and the infusion structure 110 are directly snapped 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 of an integrated design, connected by a wire, arranged inside the same housing 10, and attached to a certain position of the user's skin through an adhesive patch 120, and are discarded as a whole after a single use. Figure 1b shown.

[0066] 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.

[0067] Figure 2a-2b Schematic diagram of the three-dimensional structure of the control structure 100 according to an embodiment of the present invention.

[0068] The control structure 100 also includes a plurality of first electrical contacts 103 exposed on the surface of the control structure 100. The first electrical contacts 103 are used as circuit connection terminals to electrically connect the internal circuits provided on the control structure 100 and the infusion structure 110, respectively. The embodiment of the present invention does not impose any specific restrictions on the position where the first electrical contacts 103 are provided. Compared with the connection terminals provided as connectors, the contact area of ​​the electrical contacts is smaller, and the design can be flexible, which effectively reduces the volume of the control structure. At the same time, the electrical contacts can be directly electrically connected to the internal circuits or electrical components, or can be directly soldered on the circuit board, which optimizes the design of the internal circuits, effectively reduces the complexity of the circuits, saves costs, and reduces the volume of the infusion device. Furthermore, the electrical contacts are exposed on the surface of the control structure 100, which can facilitate electrical connection with the connection terminals on other structures. The above technical advantages of the electrical contacts are applicable to the first electrical contacts 103 on the control structure 100 and the second electrical contacts 113 on the infusion structure 110, which will not be described in detail below.

[0069] The first electrical contact 103 may be a rigid metal contact or an elastic conductive member. Preferably, in the 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 end disposed inside the control structure 100, and the other end is exposed to the surface of the housing 101, and the rest of the first electrical contact 103 is tightly embedded in the housing 101 to isolate the interior of the control structure 100 from the outside.

[0070] 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 be electrically connected to the connection end inside the control structure 100, and the other end is used to be electrically connected to other connection ends. As 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 a circuit or electrical component.

[0071] 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. The "tightly embedded" hereinafter has the same meaning as here.

[0072] 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.

[0073] In the embodiment of the present invention, the control structure 100 is further provided with a first engaging portion 102. The first engaging portion 102 is used to engage with the second engaging portion 112 of the infusion structure 110, so that the control structure 100 and the infusion structure 110 are assembled with each other, and the first electrical contact 103 is electrically connected with the second electrical contact 113, which will be described in detail below.

[0074] 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, and their positions can be flexibly designed according to the shape structures of the control structure 100 and the infusion structure 110, such as being arranged inside or on the surface of the corresponding structure, and no specific restrictions are made here.

[0075] 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.

[0076] In the embodiment of the present invention, a buzzer (not shown) is also provided in the control structure 100. When the infusion starts or ends, the infusion device fails, the medicine is exhausted, the control structure 100 issues an erroneous instruction or receives an erroneous message, etc., the buzzer is used to send out an alarm signal such as sound or vibration, so that the user can be aware of it and make timely adjustments.

[0077] In the embodiment of the present invention, a sound-permeable hole 105 is provided on the housing 101 of the control structure 100 to facilitate the transmission of the sound alarm signal of the buzzer. In order to achieve a good sealing effect to 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 is transmitted.

[0078] Compared with the traditional technical solution of sealing the buzzer inside the control structure 100, after the sound-permeable hole 105 is provided, the buzzer can be perceived by the user with a relatively small sound, thereby reducing the energy consumption of the buzzer, optimizing the power consumption configuration of the infusion device, and saving production costs.

[0079] Figure 3a Schematic diagram of the three-dimensional structure of the infusion structure 110 according to an embodiment of the present invention. Figure 3b 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 The figure 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.

[0080] The drug infusion device also includes an infusion structure 110. The housing is provided with an infusion module, a circuit module and other auxiliary modules for completing drug infusion, which will be described in detail below. The housing of the infusion structure 110 may include multiple parts. For example, in an embodiment of the present invention, the housing of the infusion device includes an upper housing 111a and a lower housing 111b.

[0081] 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 cooperate and engage with the first engaging portion 102. Therefore, the first engaging portion 102 and the second engaging portion 112 are provided at corresponding positions.

[0082] 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 squeeze 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 squeezing between the two electrical contacts of different structures can improve the reliability of the electrical connection. Similar to the first electrical contact 103, the types of the second electrical contact 113 also include rigid metal contacts or elastic conductive parts. Specifically, in an embodiment of the present invention, the second electrical contact 113 is a conductive spring. Similarly, the conductive spring can improve the electrical connection performance. A groove is also provided around the area where the second electrical contact 113 is provided, and a sealing member 115 is provided in the groove.

[0083] Preferably, in the embodiment of the present invention, the diameters of the two ends of the conductive spring are different, the diameter exposed to the outside of the infusion structure 110 is shorter, and the diameter of the portion located inside the infusion structure 110 is longer. The longer diameter can block the conductive spring in the housing. Therefore, when the control structure 100 is not mounted on the infusion structure 110, the longer diameter can prevent the conductive spring from falling off the infusion structure 110.

[0084] 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 disposed on the protrusion 114, such as Figure 3a The convex portion 114 corresponds to the concave portion 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.

[0085] In other embodiments of the present invention, the protrusion 114 may be disposed 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.

[0086] 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 implementation 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, such as Figure 3b Installation direction shown.

[0087] In the embodiment of the present invention, the lower shell 111b of the infusion structure 110 includes an outward extension portion 116, and a blocking block 117 is disposed on the outer side of the extension portion 116. Figure 3a As described above, the control structure 100 is pressed to the engaging position along the thickness direction of the infusion structure 110, and the blocking block 117 can prevent the control structure 100 from falling off along the length direction 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 to the engaging position along other directions, the position of the blocking block 117 can be adjusted to prevent the control structure 100 from falling off the infusion structure 110.

[0088] It should be noted that “outward” and “outside” are relative to the main part 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.

[0089] In the embodiment of the present invention, a pressing portion 118 is further provided at the outer end of the extension portion 116, which is used to release the blocking effect of the blocking block 117. When the user replaces the infusion structure 110, the user presses the pressing portion 118 with a finger to release the blocking effect of the blocking block 117 on the control structure 100. The user removes the control structure 100 from the infusion structure 110 with two fingers.

[0090] The embodiment of the present invention may also be provided with an unlocking hole 119. The unlocking hole 119 is provided on the inner side of the blocking block 117. While pressing the pressing portion 118, the index finger can enter the unlocking hole 119, thereby ejecting the control structure 100, and separating the control structure 100 from the infusion structure 110. In the embodiment of the present invention, the unlocking hole 119 is square. The square unlocking hole 119 can facilitate smooth entry of a finger. In other embodiments of the present invention, the unlocking hole 119 may also be other shapes, which are not specifically limited here.

[0091] 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 provided, the thickness or width (eg 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.

[0092] Preferably, in the embodiment of the present invention, the fold groove 140 is disposed at both ends of the blocking block 117, such as Figure 3c In another embodiment of the present invention, the fold groove 140 is disposed on one side of two corresponding sides of the unlocking hole 119, as shown in FIG. Figure 3d shown.

[0093] The infusion structure 110 of the embodiment of the present invention is further provided with an infusion needle unit 121 for infusing the drug subcutaneously.

[0094] The bottom of the lower shell 111b of the infusion structure 110 is also provided with an adhesive patch 120 for sticking the infusion device to the user's skin surface.

[0095] Figure 4a-4b They are schematic three-dimensional structural diagrams of the internal structure 130 of the infusion structure 110 according to an embodiment of the present invention from two perspectives. Figure 4c FIG. 1 is a schematic three-dimensional structural diagram of an internal structure 130 of an infusion structure 110 according to another embodiment of the present invention.

[0096] In the embodiment of the present invention, the internal structure 130 includes a mechanical unit and an electric control unit for completing the infusion function, such as a drug storage cartridge 131, a drug outlet 132, a power source 133, a driving wheel 134, a screw 135, a circuit board (not shown), and a driving unit 1310, etc. The movement of the driving unit 1310 drives the driving wheel 134 to rotate, and then drives the screw 135 to push the piston 312 in the drug storage cartridge 131 to move, thereby achieving drug infusion.

[0097] 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 supplying power to 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 As shown. Conventionally, the discharge capacity of button batteries is low. Providing double-row button batteries can reduce the discharge level of each battery and extend the battery life. Furthermore, the double-row design of the 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.

[0098] 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 part of the structural surface, which is used to supply power to a specific structural unit. According to the internal structural characteristics of the infusion device, the shape and position of the three-dimensional circuit can be flexibly designed, and the internal space of the infusion structure can be fully utilized to make the structure more compact. The circuit board is 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 shape of the flexible circuit board is plastic, and its shape can be flexibly designed according to the internal space of the infusion structure 110. At the same time, a plurality of connection terminals can be provided on the flexible circuit board to be electrically connected to different second electrical contacts 113, so as to conduct the circuit between the control structure 100 and the infusion structure 110, so that the infusion device can realize the normal infusion function.

[0099] An elastic conductor 136 is also provided inside the infusion structure 130. The elastic conductor 136 is electrically connected to the power source 133 and a specific connection terminal on the circuit board (or three-dimensional circuit) respectively, thereby realizing power supply to the specific structural unit.

[0100] Figure 5 FIG. 1 is a schematic diagram of a three-dimensional structure of an elastic conductor 136 according to an embodiment of the present invention.

[0101] In the embodiment of the present invention, the elastic conductor 136 includes a first elastic conductive part 136a connected to the power supply 133 and a second elastic conductive part 136b connected to a specific connection end on the circuit board (or three-dimensional circuit). At least one protrusion 1361 is provided on each of the first elastic conductive part 136a and the second elastic conductive part 136b, which facilitates the point contact connection or line contact connection between the first elastic conductive part 136a and the power supply 133, and the point contact connection or line contact connection between the second elastic conductive part 136b and the specific connection end on the circuit board (or three-dimensional circuit), thereby improving the electrical connection reliability between the elastic conductive sheet 136 and the power supply 133 and the specific connection end on the circuit board (or three-dimensional circuit). When the elastic conductive part 136a and the second elastic conductive part 136b are both planes, 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 may be a line protrusion formed by bending the first elastic conductive portion 136a or the second elastic conductive portion 136b, or may be a plurality of point-shaped or other shaped protrusions formed by processing the first elastic conductive portion 136a or the second elastic conductive portion 136b by other means. The form and quantity of the protrusions 1361 on the first elastic conductive portion 136a or the second elastic conductive portion 136b may be the same or different. Here, the form, quantity 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 ends on the power supply 133 and the circuit board (or three-dimensional circuit) can be strengthened to improve the reliability of the electrical connection.

[0102] 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 between the first elastic conductive portion 136a and the second elastic conductive portion 136b (such as Figure 5 The insulating component 1362 is also provided to prevent the power component 1311 from contacting the elastic conductor 136 during operation to cause a short circuit and stop the infusion structure 130 from working. In the embodiment of the present invention, the insulating component 1362 is formed by printing ink. In other embodiments of the present invention, the insulating component 1362 can also be insulating glue, insulating paint or other insulating materials, which are not specifically limited here.

[0103] In an embodiment of the present invention, the elastic conductor 136 may be a metal sheet including a first elastic conductive part 136a and a second elastic conductive part 136b, or may be an integrated body formed by directly or indirectly electrically connecting the first elastic conductive part 136a and the second elastic conductive part 136b separately, and no limitation is made here. When the elastic conductor 136 is a metal sheet including a first elastic conductive part 136a and a second elastic conductive part 136b, not only is the manufacturing process of the elastic conductor 136 simple, the connection between the first elastic conductive part 136a and the second elastic conductive part 136b is firm, and the volume of the elastic conductor 138 can be reduced, saving materials and reducing raw material costs and production costs. When the elastic conductor 136 is formed by directly or indirectly electrically connecting the first elastic conductive part 136a and the second elastic conductive part 136b through other conductive elements, the elastic conductive part can be flexibly selected according to the needs of the specific connecting parts to optimize the internal design of the infusion structure.

[0104] In the embodiment of the present invention, a positioning column 138 is further provided on the main frame 137, and an opening adapted to the positioning column 138 is provided on the elastic conductor 136. The elastic conductor 136 is sleeved on the positioning column 138 through the opening, so that the elastic conductor 136 is fixed on the main frame 137. At the same time, the positioning column 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 a poor connection with a specific connection end on the power supply 133 or the circuit board (or three-dimensional circuit), thereby affecting use.

[0105] In the embodiment of the present invention, a boss 139 is further provided on the main frame 137, and the boss 139 is located below the first elastic conductive part 136a to prevent the protrusion 1361 of the first elastic conductive part 136a from being flattened or deformed during long-term use, thereby causing poor connection and contact between the first elastic conductive part 136a and a specific connection end on the circuit board (or three-dimensional circuit), thereby causing a malfunction. Preferably, the setting position of the boss 139 deviates from the projection position of the protrusion 1361 on the main frame 137 and is close to the positioning column 138. On the one hand, it can prevent the first elastic conductive part 136a from being hard-contacted or pressed against the specific connection end on the circuit board (or three-dimensional circuit) to damage the circuit board, and on the other hand, it can ensure the elastic electrical contact between the first elastic conductive part 136a and the specific connection end on the circuit board (or three-dimensional circuit).

[0106] Similar to the elastic conductive member, the types of the elastic conductor 136 include conductive springs, conductive springs, conductive rubber or conductive silicone, etc., which are not specifically limited here, as long as the conditions for electrically connecting the power source 133 to a specific connection terminal on the circuit board (or three-dimensional circuit) can be met. Preferably, in the 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 FIG4a.

[0107] 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.

[0108] like Figure 4a As shown, the infusion structure 110 also includes a driving unit 1310 and a power component 1311, which are arranged on the main frame 137. The main frame 137 is also provided with a rotating shaft 1313. The driving unit 1310 is provided with a through hole, and the driving unit 1310 is fixed on the rotating shaft 1313 through the through hole; the driving unit 1310 includes a driving end 1312, one end of the power component 1311 is connected to the driving unit 1310 to provide power for the driving unit 1310, and the other end is connected to a specific electrical connection end on a circuit board or a three-dimensional circuit through a conductive platform 1314, and further connected to the control module in the control structure 100. The control module in the control structure 100 applies power to the power component 1311, and the driving unit 1310 rotates around the rotating shaft 1313, driving the driving end 1312 forward to push the gear teeth of the driving wheel 134 forward, so that the infusion device performs drug infusion. In the embodiment of the present invention, there are two driving ends 1312, and correspondingly there are two power components 1311. In another embodiment of the present invention, there are one driving end 1312 and one power component 1311, respectively. Figure 4c shown.

[0109] 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 driving unit 1310 and the other end electrically connected to a specific electrical connection end on the circuit board or the three-dimensional circuit, so as to fix the driving unit 1310 and realize the electrical connection between the driving unit 1310 and the specific electrical connection end on the circuit board or the three-dimensional circuit.

[0110] Figure 6 A schematic diagram of a three-dimensional structure of a conductive tower spring 1315 according to an embodiment of the present invention.

[0111] 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 the rotating shaft 1313 is fixed by interference fit to further fix the drive unit 1310, while 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, affecting the accuracy of infusion; the diameters of portions B and C gradually expand in a trumpet shape toward both ends, and when portions B and C are electrically connected to the drive unit 1310 and specific electrical connection ends on a circuit board or a three-dimensional circuit, respectively, the conductive tower spring 1315 is compressed, so portions B and 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 the three-dimensional circuit at the same time, thereby improving the electrical connection reliability of the infusion device.

[0112] Preferably, in the embodiment of the present invention, the B part and the C part of the conductive tower spring 1315 are symmetrical structures, and the two ends can be assembled at will to avoid assembly misalignment.

[0113] Figure 7 for Figure 4a A local magnified view of the M region.

[0114] In the embodiment of the present invention, at least one conductive platform 1314 is disposed 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 three-dimensional circuit respectively.

[0115] The conductive platform 1314 includes a conductive platform body 141 and a conductive arm 142. The conductive arm 142 is an elastic conductive element. At least one conductive platform protrusion 1421 is provided on the conductive arm 142, which is convenient for point contact connection or line contact connection with a specific connection end on a circuit board (or a three-dimensional circuit), and improves the electrical connection reliability between the conductive platform 1314 and the specific connection end on the circuit board (or a three-dimensional circuit). When the conductive arm of the conductive platform 1314 is a planar structure, it is likely to cause poor connection between the conductive platform 1314 and the specific connection end on the circuit board (or a three-dimensional circuit) during use, thereby affecting the use effect. In the embodiment of the present invention, the conductive platform protrusion 1421 can be a line protrusion formed by bending the conductive arm 142, or it can be a plurality of point-shaped or other shaped protrusions formed by processing the conductive arm 142 by other means. Here, the form, number and formation method of the conductive platform protrusion 1421 are not specifically limited, as long as the electrical connection reliability between the conductive platform 1314 and the specific connection end on the circuit board (or a three-dimensional circuit) can be enhanced. In the embodiment of the present invention, the conductive platform body 141 further includes a conductive platform body end 1411, and 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 by die casting, so that the connection is stable and the electrical connection reliability is high. Specifically, the power component 1311 is placed in the conductive platform body end 1411 after being folded in half, and then connected to the conductive platform body end 1411 by die casting, so that the electrical connection reliability is further high.

[0116] In an embodiment of the present invention, the conductive platform 1314 may be a metal sheet including a conductive platform body 141 and a conductive arm 142, or the conductive platform body 141 and the conductive arm 142 may be directly or indirectly electrically connected to form an integrated body through other conductive elements, and no limitation is made here. When the conductive platform 1314 is a metal sheet including a conductive platform body 141 and a conductive arm 142, not only can the manufacturing process of the conductive platform 1314 be simplified, the connection between the conductive platform body 141 and the conductive arm 142 be firm, but also the volume of the conductive platform 1314 can be reduced, materials can be saved, and the cost of raw materials and production costs can be reduced. When the conductive platform 1314 is formed by the conductive platform body 141 and the conductive arm 142 being electrically connected directly or indirectly through other conductive elements, the elastic conductive part can be flexibly selected according to the needs of the specific connecting parts to optimize the internal design of the infusion structure.

[0117] Similarly, the conductive platform body 141 and the conductive platform body end 1411 may also be metal sheets, or may be directly or indirectly electrically connected and integrated through other conductive elements, and no specific limitation is made here. The conductive platform 1314 may be a metal sheet including the conductive platform body 141, the conductive arm 142 and the conductive platform body end 1411, or two of them may be metal sheets and then be directly or indirectly electrically connected and integrated with a third party through other conductive elements, or all three may be directly or indirectly electrically connected and integrated through other conductive elements, and no specific limitation is made here. The benefits of various molding methods are as described above and will not be repeated again. 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.

[0118] In the 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 column 1317 is also provided on the main frame 137. An opening adapted to the conductive platform positioning column 1317 is provided on the conductive platform 1314. The conductive platform 1314 is sleeved on the conductive platform positioning column 1317 through the opening, so that the conductive platform 1314 is fixed to the main frame 137. At the same time, the conductive platform positioning column 1317 is melted by hot melting to further fix the conductive platform 1314, so as to prevent the conductive platform 1314 from shaking due to long-term use or other reasons, thereby causing poor connection between the conductive platform 1314 and a specific connection end on the circuit board (or three-dimensional circuit), thereby affecting use.

[0119] In the embodiment of the present invention, a conductive platform boss (not shown in the figure) is also provided on the main frame 137, and 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 contact between the conductive platform 141 and the specific connection end on the circuit board (or three-dimensional circuit), thereby causing a malfunction. Preferably, the setting position of the conductive platform boss deviates from the projection position of the conductive platform protrusion 1421 on the main frame 137, and is close to the conductive platform positioning column 1317. On the one hand, it can prevent the conductive arm 142 from hard contact or solid pressure with the specific connection end on the circuit board (or three-dimensional circuit) to damage the circuit board, and on the other hand, it can ensure the elastic electrical contact between the conductive arm 142 and the specific connection end on the circuit board (or three-dimensional circuit).

[0120] Similar to the elastic conductor 136, the types of the conductive platform 1314 include conductive springs, conductive shrapnel, conductive rubber or conductive silicone, etc., and there is no specific limitation here, as long as the conditions for electrically connecting the power component 1310 to the specific connection terminal on the circuit board (or three-dimensional circuit) are met.

[0121] Figure 8a and Figure 8bThe figures are schematic diagrams of the structures before and after the assembly of the driving wheel assembly and the main frame 17 according to an embodiment of the present invention, respectively. Figure 8c FIG. 4 is a schematic diagram of a three-dimensional structure of a cover according to an embodiment of the present invention.

[0122] The driving wheel assembly includes a driving wheel body 16 and a movable block 18. The driving wheel body 16 includes a driving wheel 161, a driving tube 162, which is provided with a thread for accommodating a screw rod 135, and a connecting member 163 provided at the end of the driving wheel 161, and a connecting portion 1631 is provided on the connecting member 163 for operably connecting with the movable block 18. The movable block 18 is provided with a thread for accommodating the screw rod 135, and a movable block connecting rod 181 movably connected with the connecting portion 1631 is also provided on the movable block 18. After the connecting rod 181 is movably connected with the connecting portion 1631, the movable block 18 can rotate around the connecting rod 181, thereby opening or closing the movable block 18. When the movable block 18 is opened, the screw rod 135 can slide toward the driving wheel body 16 side, and when the movable block 18 is closed, the screw rod 135 cannot slide toward the driving wheel body 16 side, which will be described in detail below.

[0123] The driving wheel assembly also includes a cover 15, on which a plurality of cover engaging portions 151 are provided for engaging with the main frame 17. The main frame 17 is provided with a main frame groove 171 for accommodating the driving 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 driving wheel body 16 and the movable block 18 are connected, they are placed in the main frame groove 171, and then the cover 15 is assembled to the main frame 17. Through the engagement of the main frame engaging portion 173 and the cover engaging portion 151, the driving wheel body 16 and the movable block 18 can be fixed in the main frame 17, so as to prevent the shaking of the driving wheel body 16 from affecting the accuracy of drug infusion.

[0124] The main frame engaging portion 172 and the cover engaging portion 151 include one or more of hooks, blocks, holes, and slots that can be engaged with each other, and their positions can be flexibly designed according to the shape and structure of the main frame 17 and the cover 15, and are not specifically limited here. Preferably, the structural body formed by the plurality of main frame engaging portions 173 and the plurality of cover engaging portions 151 can just accommodate the driving wheel body 16 and the movable block 18 to prevent the driving wheel body 16 from shaking.

[0125] In the embodiment of the present invention, the cover 15 is further provided with at least one elastic arm 152 for elastically abutting the driving tube 162, which can further fix the driving 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 driving wheels 161, respectively abutting the driving tube 162, such as Figure 8b As shown, the driving wheel body 16 is fixed at multiple points.

[0126] The cover 15 is also provided with a baffle 153, and a groove is provided on the baffle 153. A slot 173 is also provided on the side of the main frame 17 near the drug storage cartridge 131, which is used to accommodate a baffle bar (not shown in the figure). The baffle bar abuts against the baffle 153 to form a through hole, which is used to accommodate the screw rod 135, and at the same time, the driving wheel body 16 and the movable block 18 are confined in the main frame 17. Preferably, the baffle 153 has a semicircular groove, and its diameter is adapted to the diameter of the screw rod 135, so as to better accommodate the screw rod 135 and prevent the screw rod 135 from shaking significantly under the action of external force.

[0127] Preferably, in the embodiment of the present invention, the cover is an integrally formed structure, which has simple process, small volume, firm connection, material saving and cost reduction.

[0128] Figure 9a-9d 1 is a schematic cross-sectional structural diagram and a schematic three-dimensional structural diagram of the movable block 18 in an open state and a closed state, respectively, according to an embodiment of the present invention.

[0129] The movable block 18 further includes an upper movable block 182 and a lower movable block 183, and the lower movable block 183 is further provided with a lower movable block end 1831. The movable block 18 is opened when the upper movable block 182 is close to the driving wheel 161, the lower movable block 183 is away from the driving wheel 161, the thread in the movable block 18 is not engaged with the screw 135, and the screw 135 can slide smoothly in the movable block 18 and the driving tube 162. The movable block 18 is closed when the upper movable block 182 is away from the driving wheel 161, and the lower movable block 183 is close to the driving wheel 161. At this time, the thread in the movable block 18 is engaged with the screw 135, and the screw 135 cannot slide in the movable block 18 and the driving tube 162.

[0130] In the embodiment of the present invention, an arc-shaped blocking member 174 is further provided on the main frame 17 to limit the position of the lower movable block 183. When the movable block 18 is opened, that is, the upper movable block 182 is close to the driving wheel 161, and the lower movable block 183 is away from the driving wheel 161, the lower movable block end 1831 of the lower movable block 183 is located outside the arc-shaped blocking member 174, so that the movable block 183 is kept in the open state. At this time, the thread in the movable block 18 does not bite with the screw 135, and the screw 135 can slide smoothly in the movable block 18 and the driving tube 162. When the movable block 18 is in the open state, the drug storage cartridge 131 can be filled with drugs. In the process of filling the drug storage cartridge 131, the screw 135 can smoothly move to the end of the driving wheel 161 under the driving action generated during the filling process until the filling is completed without the assistance of other components. The structure is simple, the integration is high, the cost is saved, the volume of the infusion structure 110 is reduced, and the actual drug storage space of the drug storage cartridge 131 is utilized to the maximum extent.

[0131] 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 is engaged with the screw 135, and the screw 135 cannot slide in the movable block 18 and the driving tube 162. When the drug injection is completed, when the infusion device 110 implements drug infusion, the driving end 1312 of the driving unit 1310 pushes the driving wheel 161 forward, and the movable block 18 rotates with the driving wheel 161. During the rotation, after the end 1831 of the lower movable block bypasses 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 a closed state, the screw 135 can only move in a direction away from the driving wheel 161 under the driving action generated by the rotation of the driving wheel 161 to perform drug infusion, without worrying about the screw 135 moving freely due to the failure of the engagement of the screw 135 with the movable block 18 or the thread in the driving tube 162, affecting the infusion effect or even causing the infusion device to fail.

[0132] In the embodiment of the present invention, the end surface of the driving wheel 16 close to the drug storage cartridge 131 is provided with a notch 1611, the shape of which is adapted to the lower movable block 183, for accommodating the lower movable block 183. When the end 1831 of the lower movable block bypasses the arc-shaped blocking member 174 and falls into the inner side of the arc-shaped blocking member 174, the lower movable block 183 is accommodated in the notch 1611 of the driving wheel 161, 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.

[0133] It should be noted here that “inside” and “outside” are relative to the arc-shaped blocking member 174 and are relative position concepts. Figure 9b or Figure 9d shown.

[0134] Fig.10a Schematic diagram of the structure of the adhesive patch 120 in an embodiment of the present invention. Fig.10b Schematic diagram of the structure of each layer of the adhesive patch 120. Fig.10c Schematic diagram of the stacking sequence of the adhesive patch 120. Fig.10d Schematic diagram of the structure of the adhesive patch 120 having multiple layers of adhesive tape. Fig.10e FIG. 1 is a schematic diagram of the stacking sequence of the adhesive patch 120 having multiple layers of adhesive tape.

[0135] The adhesive patch 120 includes an adhesive tape 1201. The first surface α of the adhesive tape 1201 is fixedly connected to the lower shell 110b of the infusion structure 110, and the second surface β is coated with an adhesive material for pasting the infusion device on the host skin surface. The adhesive tape 1201 is selected from one of polyethylene, polypropylene, non-woven fabric or pure cotton. The adhesive tape 1201 is in direct contact with the host skin. According to the actual use environment, the above materials can be selected to avoid adverse reactions caused by long-term contact between the adhesive tape 1201 and the skin. In order to adapt to the movement of the host skin, such as bending, stretching, etc., the thickness of the adhesive tape 1201 is very thin, for example, about 1um to 500um. Such a thin adhesive tape will cause other problems, such as static electricity of the host skin. Before being installed on the skin surface, the static electricity of the skin causes the adhesive tape to curl or warp, so that it cannot be laid flat on the skin surface, or after being installed on the skin surface, due to the violent movement of the skin, the edge of the adhesive tape will 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.

[0136] 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.

[0137] In a preferred embodiment of the present invention, the protective film 1202 is one of polycarbonate, polyamide, polyoxymethylene, polyphenylene ether, polyester, polyphenylene sulfide, and polyarylate.

[0138] 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 to 95 HRM.

[0139] 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 .

[0140] In a preferred embodiment of the present invention, the thickness of the protective film is 10-500 um.

[0141] 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 of the protective film of the annular structure is consistent with the outer edge contour, which is more beautiful and enhances the user experience.

[0142] In the embodiment of the present invention, a first through hole 12011 is formed on the adhesive tape 1201, and the position of the first through hole 12011 corresponds to the portion where the infusion needle penetrates into the body. Fig.10b As shown, it is used to pass the infusion needle to penetrate the host's skin.

[0143] At least one layer of release paper 1203 is also 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.

[0144] In a preferred embodiment of the present invention, the release paper 1203 is a single silicon release paper, and its peeling force is 30-50g.

[0145] In the embodiment of the present invention, a second through hole 12031 is formed 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 can pass through the first through hole 12011 and the second through hole 12031 in sequence to pierce the host skin.

[0146] In order to facilitate the user to peel off the release paper 1203 and the adhesive tape 1201 and save space, the release paper 1203 is preferably two layers, and the peeling openings thereof are inwardly facing each other, and the peeling opening of one layer is bent outward and covered by the peeling opening of the other layer. In combination with the above, the adhesive patch 120 is composed of the protective film 1202, the adhesive tape 1201 and the release paper 1203 from the α surface to the β surface.

[0147] In another embodiment of the present invention, the adhesive patch includes at least two layers of adhesive tape. Except for the first layer of adhesive tape that is fixedly connected to the lower shell of the infusion device, the other layers of adhesive tape are stacked and sleeved on the infusion device. Through the relay effect of the adhesive tape, the infusion device is adhered to the host skin surface for a long time, thereby extending the use time of the infusion device. The outer edge contour of the outer layer (away from the skin side) of the adhesive tape completely covers the outer edge contour of the inner layer (close to the skin side). It should be noted that the complete coverage mentioned here includes that the outer edge contours of the outer layer and the inner layer are completely overlapped, that is, the areas of the inner and outer layers are equal, and also includes that the outer edge contour of the outer layer extends outward along the outer edge contour of the inner layer, that is, the area of ​​the outer layer is larger than the area of ​​the inner layer.

[0148] It should be further explained that, except for the first layer of tape, the remaining layers are stacked on the infusion device. Therefore, in the embodiments of the present invention, unless otherwise specified, the "coverage" or "area" mentioned in the specification refers to the relationship or area between the inner and outer layers of tape protruding from the infusion device.

[0149] When the outer layer of adhesive tape completely covers the inner layer of adhesive tape adjacent to it, after the outer layer of adhesive tape is torn off, the exposed inner layer of adhesive tape is in a brand new state without dirt, thereby improving the user experience. Preferably, the area of ​​the outer layer of adhesive tape is larger than the area of ​​the inner layer of adhesive tape adjacent to it. Since the outer layer of adhesive tape first curls, warps or is contaminated, after the outer layer of adhesive tape is torn off, it can be ensured that the exposed inner layer of adhesive tape is in a brand new state, thereby further improving the user experience.

[0150] In another embodiment of the present invention, the outer layer of adhesive tape at least partially covers the inner layer of adhesive tape. The at least partial covering mentioned here includes that the outer edge contour of the inner layer of adhesive tape completely protrudes from the outer edge contour of the outer layer of adhesive tape. At this time, although the outer edge of the inner layer of adhesive tape will first curl or warp to a certain extent, when the position of the warping or curling extends to the position where the outer layer of adhesive tape overlaps, due to the protective effect of the outer layer of adhesive tape, the inner layer of adhesive tape will stop or pause curling or curling, thereby extending the use time of the infusion device.

[0151] At least partial coverage also includes that parts of the outer edge contours of the inner and outer layers of tape protrude from each other. As mentioned above, the portion of the outer edge contour of the outer layer of tape that protrudes from the outer edge contour of the inner layer of tape curls or warps first. After the outer layer of tape is torn off, the portion of the inner layer of tape corresponding to the outer layer is in a brand new state. When the portion of the outer edge contour of the inner layer of tape that protrudes from the outer edge contour of the outer layer of tape curls or warps and extends to the position overlapping with the outer layer of tape, the inner layer of tape will stop or pause warping or curling, which can extend the use time of the infusion device to a certain extent.

[0152] The adhesive patch also includes a protective film, which is arranged on the outermost layer of the adhesive tape, and the outer edge contour is adapted to the outer edge contour of the outermost layer of the adhesive tape to prevent the outermost layer of the adhesive tape from curling or warping, thereby further extending the use time of the infusion device.

[0153] In another embodiment of the present invention, the adhesive patch 120 includes multiple layers of adhesive tape and multiple layers of protective film, and each two layers of adhesive tape are separated by a layer of protective film to prevent the adjacent adhesive tapes from sticking to each other and facilitate the separation of the adhesive tapes. Fig.10d and Fig.10e As shown, the outer contours of the third layer of adhesive tape 1205 and the third layer of protective film 1206 are adapted to each other and have the same area; the outer contours of the second layer of adhesive tape 1203 and the second layer of protective film 1204 are adapted to each other and have the same area. Adaptation here means that the outer contour size, bending radius, shape and other parameters of the protective film are consistent with the outer contour parameters of the adhesive tape, so that every part of the outer edge of the adhesive tape can be attached to the protective film.

[0154] During use, when the outermost protective film, i.e., the third protective film 1206, loses its protective function due to falling off or other reasons, the third protective film 1206 is torn off; after continued use for a period of time, when the outermost adhesive tape curls or warps, i.e., when the third adhesive tape 1205 curls or warps, the third adhesive tape 1205 is torn off together with the second protective film 1204 to expose the second adhesive tape 1203. After continued use for a period of time, when the second adhesive tape 1203 curls or warps, the second adhesive tape 1203 is torn off together with the first protective film 1202 to expose the first adhesive tape 1201, and the time that the infusion device is stably attached to the host skin surface is continued to be extended, while improving the user experience. Through the relay of layers of adhesive tape and the protection of the protective film, the infusion device is attached to the host skin surface for a long time, and the use time of the infusion device is extended.

[0155] It should be noted that in the embodiment of the present invention, the multi-layer adhesive tape and the multi-layer protective film are not limited to three layers, and may be two layers or more layers, which can be selected according to the time the infusion device needs to be attached to the host surface. The outermost layer may not be provided with a protective film, and the use time of the infusion device can be extended by layer-by-layer relay of adhesive tape. Preferably, the outermost layer is provided with a protective film, which can prevent the curling or warping of the outermost layer of adhesive tape, and further extend the use time of the infusion device.

[0156] It should also be noted that the position and size relationship of the adjacent inner and outer layers of tape and protective film are consistent with the aforementioned multi-layer tape without protective film, that is, the outer edge contour of the outer layer of tape and protective film can completely cover the outer edge contour of the inner layer of tape and protective film, and can also at least partially cover the outer edge contour of the inner layer of tape and protective film. The corresponding beneficial effects are also as described above. At the same time, since a protective film is also arranged between every two layers of tape, when the areas of the inner and outer layers of tape and protective films are not equal, when tearing off the outer layer of tape through the inner layer of protective film, the area difference between the inner and outer layers of protective film and tape can be utilized to easily tear off the outer layer of tape while tearing off the inner layer of protective film without affecting the inner layer of tape.

[0157] In the embodiment of the present invention, the protective film is further provided with at least one tearing portion, such as Fig.10dAs shown in 12021, 12041 and 12061, notches, perforated tear lines, or disconnected seams are provided to facilitate separation of the protective film from the inner layer of tape and tearing off the outer layer of tape. Preferably, 2-3 tearing portions are provided on the inner protective film to facilitate tearing off the protective film and the adjacent outer layer of tape from different positions to avoid affecting the inner layer of tape. Only one tearing portion is provided on the outermost protective film, which facilitates tearing off the outermost layer of tape while preventing the outermost layer of tape from curling or warping to the greatest extent, thereby extending the use time of the infusion device. It should be noted that the specific form of the tearing portion is not limited in the embodiments of the present invention, as long as it is convenient to tear off the outer layer of tape.

[0158] In another embodiment of the present invention, no tearing portion is provided on the outermost protective film to prevent the user from tearing the outermost protective film habitually, or causing the outermost protective film to open due to accidental touch, or even falling off from the outermost tape, thereby losing the protective effect of the outermost tape.

[0159] In the embodiment of the present invention, except that the first layer of adhesive tape is attached to the lower shell of the infusion device, and the area is adapted to the area of ​​the lower shell of the infusion device, the adaptation here means that the area of ​​the first layer of adhesive tape can cover the area of ​​the lower shell, and at the same time extend to a certain distance to the periphery, so that the infusion device can be better attached to the skin. The other adhesive tapes and protective films are all annular structures, which are stacked layer by layer and do not interfere with the infusion device. The inner edge of the annular structure is consistent with the outer edge contour, which is more beautiful and enhances the user experience.

[0160] In the embodiment of the present invention, the materials of each layer of adhesive tape and the protective film are as described above and will not be repeated here. The materials of each layer of adhesive tape and the protective film can be the same or different and can be selected according to actual needs.

[0161] Fig.11a FIG. 4 is a schematic diagram of the three-dimensional structure of an infusion device according to another embodiment of the present invention. Fig.11b Schematic diagram of the structure of an infusion needle unit according to an embodiment of the present invention. Fig.11c Schematic diagram of the structure of the drug storage cartridge and the cavity according to an embodiment of the present invention. Fig.11d Schematic diagram of the structure of a safety base according to an embodiment of the present invention. Fig.11e FIG. 4 is a schematic cross-sectional structural diagram of a safety base according to another embodiment of the present invention.

[0162] like Fig.11aAs shown, in the embodiment of the present invention, the infusion device includes a control structure (not shown in the figure), an infusion structure 510, an adhesive patch 520 and a safety base 522. The infusion structure 510 includes the mechanical unit, the electronic control unit, etc., such as a drug storage cartridge, a driving wheel, etc., as described above, and also includes an infusion needle unit 521, which is arranged on the infusion upper housing 511a, the adhesive patch 520 is arranged at the bottom of the lower housing 511b, and the safety base 522 is arranged below the adhesive patch 520. The infusion needle unit includes an infusion needle base 5211 and an infusion needle 5212. The infusion needle base 5211 is used to fix the infusion needle 5212 so that the drug flows subcutaneously.

[0163] Specifically, Fig.11b As shown, the infusion needle 5212 is fixedly arranged on the needle seat 5211. The infusion needle 5212 is a U-shaped steel needle, including a front end 5212a and a rear end 5212b. The front end 5212a and the rear end 5212b both extend out of the needle seat 5211. The front end 5212a is used to communicate with the opening 20 of the drug storage cartridge 5131. The rear end 5212b is used to pierce the subcutaneous tissue. Fig.11c As shown, the upper housing 511a is also provided with a cavity 30 including a first outlet 31 and a second outlet 32. The first outlet 31 is in sealed communication with the opening 20 of the drug storage cartridge 5131. Here, sealed communication means that the cavity 30 and the drug storage cartridge 5131 are connected to the first outlet 31 through the opening 20, and the drug flows through this without leakage. The second outlet 32 ​​is sealed by an elastic seal 40. When the front end 5212a of the infusion needle pierces the elastic seal 40, the infusion needle 5212, the cavity 30, the opening 20 and the drug storage cartridge 5131 are in communication, and the drug can enter the infusion needle 5212 from the drug storage cartridge 5131 and reach the rear end 5212b or be infused subcutaneously.

[0164] Please continue to refer to Fig.11a , Fig.11b and Fig.11c In the embodiment of the present invention, on the infusion device, the needle seat 5211 has three positions: an initial position, an intermediate position, and a working position. Among them, the intermediate position is between the initial position and the working position. Since the infusion needle 5212 is fixed on the needle seat 5211, in the embodiment of the present invention, the infusion needle structure also has the above three positions.

[0165] Specifically, in the embodiment of the present invention, when the needle seat 5211 is located at the initial position, the front end 5212a of the infusion needle does not pierce the elastic seal 40, and the front end 5212a of the infusion needle is not connected to the second outlet 32. When the needle seat 5211 reaches the middle position or the working position, the front end 5212a of the infusion needle pierces the elastic seal 40 and is connected to the second outlet 32. At this time, along the cavity 30 and the infusion needle 5212, the drug flows from the drug storage cartridge 5131 to the rear end 5212b of the infusion needle.

[0166] Obviously, initially, the needle seat 5211 is in the initial position, and the infusion needle 5212 is not connected to the drug storage cartridge 5131, so the infusion needle 5212 is filled with air. When leaving the factory, the infusion needle 5212 is not connected to the drug storage cartridge 5131, which can improve the flexibility of setting the infusion needle structure position and optimize the structural design of the infusion device.

[0167] After the injection is completed, the needle seat 5211 is sent to the middle position, that is, when the needle seat 5211 is in a half-pressed state, the front end 5212a of the infusion needle pierces the elastic seal 40, thereby connecting the infusion needle 5212 with the drug storage cylinder 5131 to balance the internal and external pressures. At this time, when the infusion unit is started, the drug can flow along the infusion needle 5212 to the rear end 5212b of the infusion needle, so that the pipeline is filled and the air in the infusion needle 5212 is discharged. When the needle seat 5211 is in the middle position, the rear end 5212b of the infusion needle will protrude from the adhesive patch 520. When the pipeline is filled, in order to completely exclude the air in the infusion needle 5212, a small amount of drug will flow out from the rear end 5212b of the infusion needle. Fig.11d As shown, the safety base 522 is provided with an infusion needle accommodating portion 5220, which is located at a position corresponding to the rear end 5212b of the infusion needle, and is used to accommodate the rear end 5212b of the infusion needle protruding from the adhesive patch 520 to prevent the rear end 5212b of the infusion needle from stabbing the user, and to accommodate the drug flowing out of the rear end 5212b of the infusion needle when the pipeline is filled, to prevent the rear end 5212b of the infusion needle from being contaminated by the drug flowing out and being exposed to the air before the rear end 5212b of the infusion needle is inserted into the subcutaneous tissue. If the contaminated drug is injected into the body, it may cause safety risks.

[0168] As mentioned above, the adhesive patch includes a protective film, adhesive tape and release paper, and the adhesive tape and the release paper are respectively provided with a first through hole and a second through hole for the infusion needle to pass through. In the embodiment of the present invention, the diameter of the first through hole and the second through hole is smaller than the opening diameter of the infusion needle accommodating part 5220, so as to prevent the medicine contained in the infusion needle accommodating part 5220 from overflowing from the opening of the infusion needle accommodating part 5220 due to shaking and the like and infiltrating into the adhesive tape, so that the adhesiveness of the adhesive tape becomes worse, thereby making the infusion device easy to fall off from the skin, affecting the user experience. The surface of the adhesive tape is also provided with densely arranged air holes evenly arranged, so that the adhesive tape has air permeability, which can help the water vapor and sweat secreted by the skin of the patient at the contact part to be discharged, and avoid the water vapor and sweat from soaking the skin, causing wrinkles on the patient's skin.

[0169] When the infusion device is filled, the release paper of the adhesive patch 520 is torn off, and the safety base 522 is removed at the same time. The infusion device is adhered to the user's skin, and then the needle seat 5211 is sent to the working position. The rear end 5212b of the infusion needle is inserted into the subcutaneous tissue to inject the drug into the body.

[0170] The safety base 522 is also provided with a third through hole 5222 for injecting medicine into the medicine storage cartridge 5131, and the position thereof corresponds to the medicine inlet 50. Fig.11c As shown. Preferably, the third through hole 5222 is conical, which is convenient for guiding an external drug injection device, such as a syringe, to be vertically inserted into the drug storage cartridge 5131. The bottom opening (the end with a larger opening diameter) of the conical hole has a diameter that is adapted to the smallest diameter portion of the syringe (except for the syringe needle), which is used to limit the syringe to prevent the syringe from being inserted too deep or too shallow, thereby affecting the effect of drug injection. Correspondingly, a corresponding fourth through hole (not shown) is provided on the adhesive tape and release paper of the adhesive patch 520, so that the syringe needle third through hole 5222 and the fourth through hole can be injected with drugs.

[0171] like Fig.11a As shown, the thickness of the safety base 522 is gradually reduced from one end close to the adhesive patch 520 to the middle part, that is, from the F end to the E end, and forms a plane with the other end R end of the adhesive patch 520, so that the infusion device can be stably placed on the desktop or other places when filling. Compared with using a safety base with an area similar to that of the lower shell 511b, using a trapezoidal safety base 522 with a thickness change can reduce the weight and volume of the entire infusion device, which is conducive to the miniaturization of the infusion device; compared with only setting a safety base with uniform thickness at the corresponding position of the rear end 5212b of the infusion needle, since the two ends of the infusion device have the same height difference relative to the safety base, it cannot be stably placed on the desktop, and may cause the infusion device to shake due to accidental contact, thereby causing the drug in the drug storage cartridge 5131 or the infusion needle accommodating part 5220 to shake and affect the use effect, while using a safety base 522 with a thickness change can form a plane with the lower shell 511b of the infusion device, so that it can be stably placed on the desktop.

[0172] Continue to refer Fig.11d The safety base 522 is trapezoidal, that is, the bonding surface with the adhesive patch 520 is trapezoidal, the short side of the trapezoid is the thicker end F, the long side of the trapezoid is the thinner end E, and the F end corresponds to the unlocking hole of the infusion device (such as Figure 3a 119), the length is less than the length of the unlocking hole, and the length of the E end is less than the width of the infusion device. Preferably, the safety base 522 is an equilateral trapezoid, which makes the infusion device as small as possible and allows the infusion device to be placed more stably on the desktop.

[0173] In the aforementioned embodiment, the drug infusion device is in the initial position when it leaves the factory. After the user completes the injection, he needs to first half-press the needle seat to the middle position before performing subsequent operations, which results in a low user experience. If the drug infusion device is half-pressed to the middle position when it leaves the factory, at this time, the front end 5212a of the infusion needle pierces the elastic seal 40, thereby connecting the infusion needle 5212 with the drug storage cartridge 5131. When the user starts to inject the drug, due to the resistance of the piston at the end of the drug storage cartridge, the drug will first enter the infusion needle 5212, along the infusion needle 5212 to the rear end 5212b of the infusion needle, and then reach the infusion needle accommodating portion 5220. After the infusion needle accommodating portion 5220 is filled, the drug will be poured into the drug storage cartridge again. However, since the infusion needle accommodating portion 5220 is not waterproof and breathable, exhaust cannot be completed during the injection process. In addition, since the safety base 522 is disposed below the adhesive patch 520, the infusion needle accommodating portion 5220 is not waterproof and breathable. The sealing between the lower shell 511b is not good. Therefore, after the drug fills the infusion needle accommodating portion 5220, some of the drug will overflow from the infusion needle accommodating portion 5220 during the process of injecting it into the drug storage again. On the one hand, it will cause waste of the drug. On the other hand, the overflowed drug will infiltrate the adhesive patch 520, affecting the use effect of the adhesive patch 520, thereby affecting the service life of the drug infusion device.

[0174] Therefore, another embodiment of the present invention discloses a drug infusion device that can make the infusion needle in the middle position when leaving the factory, such as Fig.11e As shown, the safety base 523 includes an elastic seal 5231, a waterproof breathable membrane 5232 and a safety base body 5234, which together constitute an infusion needle accommodating portion 5230. When the infusion needle is in the middle position, the rear end 5121b of the infusion needle passes through the elastic seal 5231, and the elastic seal 5231 wraps the rear end 5121b of the infusion needle, which can prevent the drug from overflowing from the infusion needle accommodating portion 5230, thereby avoiding drug waste or affecting the adhesive patch. In addition, the gas in the pipeline can also be discharged from the waterproof breathable membrane 5232 to avoid safety hazards. In the embodiment of the present invention, since the infusion needle unit is in the middle position when leaving the factory, the infusion needle 5212 is connected to the drug storage cartridge 5131. When the user starts to inject the medicine, due to the resistance of the piston at the end of the drug storage cartridge, the medicine will first enter the infusion needle 5212, along the infusion needle 5212 to the rear end 5212b of the infusion needle, and then reach the infusion needle accommodating portion 5230. After the infusion needle accommodating portion 5230 is filled, due to the sealing effect of the elastic seal 5231, the waterproof breathable membrane 5232 and the safety base body 5234, the pressure at the end of the infusion needle accommodating portion 5230 will gradually be greater than the pressure at the piston end. Therefore, the medicine is injected into the drug storage cartridge again and will not overflow from the infusion needle accommodating portion 5230. At the same time, the gas in the pipeline can also be discharged from the waterproof breathable membrane 5232, that is, the filling process can be completed while the user is injecting the medicine, thereby shortening the user's waiting time and further improving the user experience.

[0175] In an embodiment of the present invention, the elastic seal 5231 is made of silicone, rubber, resin, etc., the safety base body 5234 is made of PP, PC, or PE, etc., the elastic seal 5231 and the safety base body 5234 are integrally formed by injection molding, and the waterproof breathable membrane 5232 is fixedly sealed and connected to the safety base body 5234 by ultrasonic welding or waterproof double-sided tape. In another embodiment of the present invention, the elastic seal 5231 and the safety base body 5234 are sealed and connected by interference fit.

[0176] In another embodiment of the present invention, the safety base 523 is a hollow elastic sealing body, such as Fig.11f As shown, the elastic sealing body is a cube, a rectangular parallelepiped, a cylinder or other structures, including a special-shaped structure, one side 5236 of which is used to wrap the rear end 5121b of the infusion needle, and at least one other side 5237 is provided with a plurality of dense micro holes 5238, the diameter of the micro holes 5238 is much smaller than the diameter of a general water droplet, which can prevent the drug from flowing out but allow the gas to be discharged, and the hollow part is the infusion needle accommodating part 5230, which is used to accommodate the infusion needle and the drug.

[0177] In the embodiment of the present invention, the thickness of the safety base 523 can be gradually changed like the safety base 522, or a structure with equal thickness or a structure with arbitrarily variable thickness. Since the user can complete the filling process during the drug filling process, it does not need to be stably placed on a desktop or other place for filling. Moreover, due to the sealing effect of the infusion needle accommodating portion 5230, when the infusion needle is in the middle position, that is, before the safety base 523 is removed, the infusion needle accommodating portion 5230 is always full of drugs, and there is no need to worry about the drugs shaking or spilling out due to shaking.

[0178] In summary, the present invention discloses a half-press-free drug infusion device, which is provided with a safety base, on which an infusion needle accommodating portion is provided, and the infusion needle accommodating portion is waterproof and breathable, so that the drug infusion device can be in the middle position when leaving the factory, and the user does not need to half-press the needle seat to the middle position before performing subsequent operations, thereby reducing the user's operating steps, and filling can be completed during the drug filling process, avoiding the filling wait, shortening the user's operation waiting time, and greatly improving the user experience.

[0179] Although some specific embodiments of the present invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A drug infusion device without half-pressing, characterized in that: include: A drug storage cartridge, used to contain drugs, wherein a piston and a screw are arranged in the drug storage cartridge; A driving wheel connected to the screw rod, driving the screw rod to push the piston forward by rotating; An infusion needle unit, the infusion needle unit comprising an infusion needle and a needle seat, the needle seat being used to fix the infusion needle, the infusion needle unit being in a middle position when leaving the factory, and the infusion needle being connected to the drug storage cartridge when leaving the factory; an adhesive patch for adhering the infusion device to the skin surface; and A safety base is arranged below the adhesive patch, and an infusion needle accommodating portion is arranged on the safety base, and the infusion needle accommodating portion has waterproof and breathable properties; The safety base comprises a safety base body, an elastic sealing member and a waterproof breathable membrane; Alternatively, the safety base is a hollow elastic sealing body, and a plurality of densely packed micro holes are arranged on at least one side of the elastic sealing body.

2. The drug infusion device without half-pressing according to claim 1, characterized in that: The safety base body and the elastic sealing component are integrally formed by injection molding.

3. The drug infusion device without half-pressing according to claim 1, characterized in that: The safety base body and the elastic sealing member are interference fit.

4. The drug infusion device without half-pressing according to claim 2 or 3, characterized in that: The safety base body and the waterproof breathable membrane are connected by ultrasonic welding or waterproof double-sided adhesive.

5. The drug infusion device without half-pressing according to claim 1, characterized in that: The thickness of the safety base gradually decreases from one end close to the adhesive patch to the middle part, and forms a plane with the other end of the adhesive patch.

6. The drug infusion device without half-pressing according to claim 1, characterized in that: The safety base has a uniform thickness.

7. The drug infusion device without half-pressing according to claim 1, characterized in that: The adhesive patch comprises at least one layer of adhesive tape and a protective film, wherein the protective film is fixed around the outer edge of the at least one layer of adhesive tape.

8. The drug infusion device without half-pressing according to claim 1, characterized in that: The adhesive patch includes at least two layers of adhesive tape.

9. The drug infusion device without half-pressing according to claim 8, characterized in that: The adhesive patch also includes at least one protective film.

10. The drug infusion device without half-pressing according to claim 7 or 9, characterized in that: The Rockwell hardness of the protective film is higher than that of the adhesive tape.

11. The drug infusion device without half-pressing according to claim 1, characterized in that: The adhesive patch also includes adhesive tape and release paper, and the surface of the adhesive tape is also provided with dense air holes.

12. The drug infusion device without half-pressing according to claim 1, characterized in that: The safety base is also provided with a third through hole.

13. The drug infusion device without half-pressing according to claim 12, characterized in that: The third through hole is a tapered hole.

14. The drug infusion device without half-pressing according to claim 1, characterized in that: The infusion device comprises an infusion structure and a control structure, and the drug storage cartridge, the driving wheel, and the infusion needle unit are arranged on the infusion structure.

15. The drug infusion device without half-pressing according to claim 14, characterized in that: The infusion structure and the control structure are separate structures, and the control structure can be reused.

16. The drug infusion device without half-pressing according to claim 15, characterized in that: The infusion structure and the control structure are electrically connected via a plurality of electrical contacts.

17. The drug infusion device without half-pressing according to claim 14, characterized in that: The infusion structure and the control structure are an integrated structure and can be discarded as a whole after use.

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