Patch-type drug infusion device

Abstract

This invention discloses a patch-type drug infusion device, comprising: a control structure and an infusion structure, the control structure being connected to the infusion structure; the infusion structure comprising: a drug storage unit, a piston, and a screw, the piston being disposed in the drug storage unit; a drive unit, a rotating shaft and a drive component with a drive end, the drive component rotating around the rotating shaft to cause the drive end to advance or return to its original position; a drive wheel with teeth, the advancing drive end pushing the teeth to rotate the drive wheel, thereby driving the screw to advance; a linear actuator and a reset unit respectively connected to the drive component, the linear actuator and the reset unit respectively applying force to the drive component to cause the drive end to advance and return to its original position; and at least two baffles disposed on the same side of the drive unit to limit the forward position of the drive unit. Due to the baffles, the infusion device can precisely control the rotation amplitude of the drive component, improving the infusion accuracy of the infusion device.

Description

Technical Field

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

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

[0003] Diabetic patients need to have their blood glucose levels checked before insulin injection. Most current methods can continuously monitor blood glucose and transmit the data in real time to a remote device for user viewing; this method is called Continuous Glucose Monitoring (CGM). This method requires a device to be placed on the skin surface, with its probe inserted into the subcutaneous tissue fluid to complete the measurement. Based on the blood glucose level detected by CGM, the infusion device delivers the required amount of insulin subcutaneously, thus forming a closed-loop or semi-closed-loop artificial pancreas.

[0004] Currently, existing infusion devices have relatively low infusion accuracy. The highest infusion accuracy is limited to the unit infusion volume that can be determined by the minimum step length of the drive wheel. Users or closed-loop systems cannot flexibly select infusion modes to meet the body's actual needs for medication.

[0005] Therefore, there is an urgent need for a drug infusion device with high infusion accuracy in existing technologies. Summary of the Invention

[0006] This invention discloses a patch-type drug infusion device with at least two baffles, which can precisely control the rotation amplitude of the drive component, improve the infusion accuracy of the infusion device, and allow the user or closed-loop system to flexibly select different infusion modes to precisely control the body fluid level to meet the body's needs.

[0007] This invention discloses a patch-type drug infusion device, comprising: a control structure having a first engaging portion and a first electrical connection portion exposed on the surface of the control structure; and an infusion structure, the infusion structure including a housing having a second electrical connection portion exposed on the surface of the housing and a second engaging portion cooperating with the first engaging portion. When the control structure and the infusion structure are assembled together, the first engaging portion and the second engaging portion engage with each other, and the first electrical connection portion is electrically connected to the corresponding second electrical connection portion, thereby electrically connecting the control structure and the infusion structure. The infusion structure further includes: a drug storage unit. A piston and a screw, the piston being disposed in a drug storage unit and connected to the screw; a drive unit including a rotating shaft and a drive component with a drive end, the drive component rotating around the rotating shaft to cause the drive end to advance or reset; a drive wheel with teeth, the advancing drive end pushing the teeth to rotate the drive wheel, thereby driving the screw to advance; a linear actuator and a reset unit respectively connected to the drive component, the linear actuator and the reset unit respectively applying force to the drive component to cause the drive end to advance and reset respectively; and at least two baffles, the baffles being disposed on the same side of the drive unit to limit the advancing position of the drive unit.

[0008] According to one aspect of the invention, the retaining wall is an elastic conductive element.

[0009] According to one aspect of the present invention, the elastic conductive element includes a conductive spring, a conductive sheet, conductive rubber, or conductive silicone.

[0010] According to one aspect of the invention, the reset unit includes an electrically driven linear actuator, an electrically heated linear actuator, or an elastic element.

[0011] According to one aspect of the invention, it further includes at least one retaining wall disposed on the other side of the drive unit.

[0012] According to one aspect of the invention, a control unit is further included, which, together with at least one retaining wall disposed on the other side of the drive unit, controls the endpoint of the movement of the drive component.

[0013] According to one aspect of the invention, a buzzer is also included that is not enclosed and is disposed within the control structure.

[0014] According to one aspect of the invention, the housing of the control structure is provided with sound-permeable holes.

[0015] According to one aspect of the invention, the housing of the control structure includes an upper housing and a lower housing, with sound-permeable holes disposed on the lower housing.

[0016] According to one aspect of the invention, a waterproof and sound-permeable membrane is provided between the buzzer and the sound-permeable hole.

[0017] According to one aspect of the present invention, the first engaging portion and the second engaging portion include one or more of the following: a hook, a block, a hole, and a groove that cooperate with each other.

[0018] According to one aspect of the present invention, the first electrical connection portion and the second electrical connection portion are a plurality of first electrical contacts and a plurality of second electrical contacts.

[0019] According to one aspect of the invention, the first electrical contact or the second electrical contact is a rigid metal contact or an elastic conductive element.

[0020] According to one aspect of the invention, the type of elastic conductive element includes a conductive spring, a conductive sheet, conductive rubber, or conductive silicone.

[0021] According to one aspect of the present invention, the first electrical contact is a rigid metal contact, the second electrical contact is a conductive spring, and grooves are provided around the perimeter of a plurality of second electrical contact areas, with a sealing element disposed in the grooves.

[0022] According to one aspect of the invention, the infusion structure is provided with different connecting ends, and the compressed conductive springs are electrically connected to the corresponding connecting ends respectively.

[0023] According to one aspect of the present invention, a flexible circuit board is further provided within the infusion structure, and a connection end is disposed on the flexible circuit board.

[0024] According to one aspect of the invention, the housing includes an upper housing and a lower housing.

[0025] According to one aspect of the invention, the lower housing includes an outward extension, and a blocking block is provided on the outer side of the extension.

[0026] According to one aspect of the invention, a pressing part is provided at the outer end of the extension.

[0027] Compared with the prior art, the technical solution of the present invention has the following advantages:

[0028] In the patch-type drug infusion device disclosed in this invention, the infusion structure is provided with at least two baffles, which can precisely control the rotation amplitude of the drive component and improve the infusion accuracy of the infusion device. Users or closed-loop systems can arbitrarily select a suitable infusion mode to precisely control the body fluid level and meet user needs.

[0029] Furthermore, the reset unit includes an electrically driven linear actuator, an electrically heated linear actuator, or an elastic element. The output power of the linear actuator can be controlled by current, resulting in more stable power output and thus making the amplitude or speed of the driven component's movement stable and controllable. In addition, when the reset unit is an elastic element, the driven component can automatically reset without consuming electrical energy, thereby reducing the power consumption and cost of the infusion device.

[0030] Furthermore, the control structure includes a first engaging portion and multiple first electrical contacts exposed on its surface; the infusion structure has multiple second electrical contacts. The small contact area of ​​the electrical contacts allows for flexible design, effectively reducing the volume of the control structure. Secondly, the first and second engaging portions engage with each other, and the first and second electrical contacts press against each other, thereby electrically connecting the control structure and the infusion structure. The control structure and the infusion structure are electrically connected through these pressing electrical contacts, optimizing circuit design and improving the reliability of the electrical connection.

[0031] Furthermore, the types of elastic conductive components used as electrical contacts include conductive springs, conductive sheets, conductive rubber, or conductive silicone. Elastic conductive components can further increase the reliability of electrical connections.

[0032] Furthermore, the alarm is installed non-enclosed within the control structure, reducing the alarm's energy consumption, optimizing the power consumption configuration of the infusion device, and saving production costs.

[0033] Furthermore, a waterproof and sound-permeable membrane is installed between the buzzer and the sound-permeable hole, which can achieve a waterproof and dustproof rating of IP68.

[0034] Furthermore, a flexible circuit board is also installed within the infusion structure. The flexible circuit board can be flexibly shaped according to the internal characteristics of the infusion structure, thus optimizing the internal design of the infusion structure.

[0035] Furthermore, the lower housing includes an outward extension, and a blocking block is provided on the outer side of the extension. The blocking block can prevent the control structure from falling off the infusion structure. Attached Figure Description

[0036] Figure 1a This is a three-dimensional structural diagram of the front of the control structure according to an embodiment of the present invention;

[0037] Figure 1b This is a three-dimensional structural diagram of the bottom surface of the control structure according to an embodiment of the present invention;

[0038] Figure 1c This is a front perspective view of the control structure with the upper outer shell removed according to an embodiment of the present invention;

[0039] Figure 2a This is a three-dimensional structural diagram of an infusion structure according to an embodiment of the present invention;

[0040] Figure 2b This is a side view of the control structure and the infusion structure being assembled together according to an embodiment of the present invention;

[0041] Figure 2c This is a top view of the lower housing of the infusion structure according to an embodiment of the present invention;

[0042] Figure 2d This is a top view of the lower housing of the infusion structure according to another embodiment of the present invention;

[0043] Figures 3a-3b These are two perspective views illustrating the internal structure of an infusion structure according to an embodiment of the present invention.

[0044] Figure 4 This is a schematic diagram of the main internal structure of the infusion structure 110 according to an embodiment of the present invention;

[0045] Figures 5a-5c The diagrams show the drive component 139 in its initial, half-stroke, and full-stroke positions, respectively. Detailed Implementation

[0046] As mentioned earlier, existing infusion devices have relatively low infusion accuracy, with the highest infusion accuracy limited to the unit infusion volume determined by the minimum step length of the drive wheel. Users or closed-loop systems cannot flexibly select infusion modes to meet the body's actual needs for medication.

[0047] To address this problem, the present invention provides a drug infusion device with at least two baffles in the infusion structure, which can precisely control the rotation amplitude of the drive component, thereby improving the infusion accuracy of the infusion device. Users or closed-loop systems can arbitrarily select a suitable infusion mode to precisely control the body fluid level and meet user needs.

[0048] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be understood that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments should not be construed as limiting the scope of the invention.

[0049] Furthermore, it should be understood that, for ease of description, the dimensions of the various components shown in the accompanying drawings are not necessarily drawn to actual scale; for example, the thickness, width, length, or distance of some units may be enlarged relative to other structures.

[0050] The following description of exemplary embodiments is merely illustrative and is not intended to limit the invention or its application or use in any way. Techniques, methods, and apparatus known to those skilled in the art may not be discussed in detail herein, but where applicable, such techniques, methods, and apparatus should be considered part of this specification.

[0051] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined or described in a figure, it will not need to be discussed further in the subsequent description of the figures.

[0052] Figure 1a This is a three-dimensional structural diagram of the front of the control structure according to an embodiment of the present invention; Figure 1b This is a three-dimensional structural diagram of the bottom surface of the control structure according to an embodiment of the present invention; Figure 1c This is a front perspective view of the control structure after removing the upper outer shell 101a according to an embodiment of the present invention.

[0053] The patch-type drug infusion device of this invention comprises two parts: a control structure 100 and an infusion structure 110. These two structures will be described separately below. In other embodiments of this invention, the patch-type drug infusion device may include more parts, and no specific limitations are imposed here.

[0054] A patch-type drug infusion device refers to an infusion device that does not contain a long catheter, and the infusion device is made of a single piece of medical adhesive tape (e.g., 120). Figure 2a and Figure 2b (As shown) is adhered to the user's skin surface as a whole, and the medication is administered by the infusion needle unit 121 in the device (as shown). Figure 2a and Figure 2b (As shown) directly from the medicine storage cylinder 131 (as shown) Figure 3a and 3b (As shown) Infuse subcutaneously along the infusion needle.

[0055] This invention relates to a patch-type drug infusion device, which includes a control structure 100. The control structure 100 receives signals or information from a remote device or a body fluid parameter detection device (such as a continuous glucose monitoring device), and then controls the infusion device to complete drug infusion. The housing 101 of the control structure 100 houses a program module for receiving signals or issuing control commands, a circuit board 107, and related electronic components, as well as other physical components or structures necessary for realizing the infusion function, which are not specifically limited here. The housing 101 includes an upper housing 101a and a lower housing 101b. In some embodiments of this invention, a power supply is also provided in the control structure. In this embodiment, the power supply 133 is located in the infusion structure 110, as described below.

[0056] The control structure 100 also includes a first electrical connection portion 103 exposed on the surface of the control structure 100. The first electrical connection portion 103 serves as a circuit connection terminal, used to electrically connect the internal circuits disposed in the control structure 100 and the infusion structure 110 respectively. The embodiments of the present invention do not impose specific limitations on the location of the first electrical connection portion 103. Specifically, in the embodiments of the present invention, the first electrical connection portion 103 is a plurality of first electrical contacts 103. Compared with the connection terminal disposed as a plug-in, the contact area of ​​the electrical contacts is smaller, allowing for flexible design and effectively reducing the volume of the control structure. Simultaneously, the electrical contacts can be directly electrically connected to internal circuits or electrical components, or can be directly soldered onto a circuit board, optimizing the design of the internal circuit and effectively reducing the complexity of the circuit, thus saving costs and reducing the volume of the infusion device. Furthermore, the electrical contacts being exposed on the surface of the control structure 100 facilitates mutual electrical connection with connection terminals on other structures.

[0057] The first electrical contact 103 may be a rigid metal contact or an elastic conductive element. Preferably, in this embodiment of the invention, the first electrical contact 103 is a rigid metal contact. One end of the first electrical contact 103 is electrically connected to a connection terminal disposed inside the control structure 100, and the other end is exposed on the surface of the lower housing 101b. The remaining portion of the first electrical contact 103 is tightly embedded in the housing 101b to isolate the interior of the control structure 100 from the outside.

[0058] Here, the elastic conductive element includes a conductive spring, conductive silicone, conductive rubber, or conductive sheet, etc. Clearly, one end of the elastic conductive element is used for electrical connection with a connection terminal inside the control structure 100, and the other end is used for electrical connection with other connection terminals. For example, in one embodiment of the invention, the first electrical contact 103 is a conductive spring. When the electrical contacts come into contact with each other, the elasticity of the conductive spring enhances the reliability of the electrical connection. Similar to rigid metal contacts, except for one end exposed on the surface of the lower housing 101b, the other part of the conductive spring is tightly embedded in the housing 101 and electrically connected to the internal circuitry or electrical components. Clearly, the connection terminal located inside the control structure 100 can be a conductive lead or a specific part of a circuitry or electrical component.

[0059] It should be noted that, in this embodiment of the invention, "tightly embedded" means that there is no gap between the electrical contacts and the housing 101, thereby achieving a seal on the interior of the control structure 100. The term "tightly embedded" will be used in the following text for the same purpose.

[0060] In another embodiment of the present invention, the first electrical contact 103 is a conductive spring, but it is not tightly embedded in the housing 101. Instead, a sealing element is provided around the area where the first electrical contact 103 is located. The sealing element is located in a groove to achieve sealing of the electrical connection position and the interior of the control structure 100.

[0061] In an embodiment of the present invention, the control structure 100 is further provided with a first engaging portion 102. The first engaging portion 102 is used to engage with the second engaging portion 112 of the infusion structure 110, so as to realize the mutual assembly of the control structure 100 and the infusion structure 110, thereby enabling the first electrical contact 103 and the second electrical contact 113 (e.g., Figure 2a and Figure 2b The electrical connections (as shown) will be described in detail below.

[0062] The first engaging part 102 and the second engaging part 112 include one or more of the following: hooks, blocks, holes, and slots that can engage with each other. Their positions can be flexibly designed according to the shape and structure of the control structure 100 and the infusion structure 110, such as being located inside or on the surface of the corresponding structure. No specific restrictions are imposed here.

[0063] In this embodiment of the invention, the control structure 100 is further provided with a recess 104 for mutual assembly with the protrusion 114 at the bottom of the infusion structure 110 housing, as will be described in detail below. Specifically, the first electrical contact 103 is disposed within the recess 104, such as... Figure 1b As shown.

[0064] In this embodiment of the invention, an alarm device is also included that is not enclosed and is disposed within the control structure 100. The housing 101 of the control structure 100 has at least one unenclosed area. In cases such as the start or end of infusion, malfunction of the infusion device, drug depletion, or the control structure 100 issuing or receiving erroneous commands or information, the alarm device emits light, sound, or vibration alarm signals to alert the user and allow for timely adjustments. The alarm device can be one or more of a light-emitting alarm, an audio alarm, or a vibration alarm; no specific limitation is made here.

[0065] In this embodiment of the invention, the non-enclosed area provided on the outer shell 101 of the control structure 100 is one or more through holes, and its shape can be circular, square, triangular, polygonal, irregular, or any other arbitrary shape; the arrangement can be single row, multiple rows, or random arrangement. The location of the non-enclosed area on the outer shell 101 of the control structure 100 is not limited. Specifically, it can be provided only on the upper shell 101a or the lower shell 101b, or simultaneously on both the upper shell 101a and the lower shell 101b. The location on the upper shell 101a or the lower shell 101b is also not limited. Specifically, it can be provided on the upper side, front side, left side, or right side of the upper shell 101a or the lower shell 101b. It can be provided on only one side, or simultaneously on multiple sides. The number, shape, and arrangement of the non-enclosed areas on each side are not limited; they can be the same or different. That is, the location, shape, size, number, and arrangement of the non-enclosed area on the outer shell 101 are not limited, as long as the alarm signal can be transmitted. Preferably, in this embodiment of the invention, the non-enclosed area is a through hole provided along each edge of the alarm, that is, the setting position of the non-enclosed area is adapted to the position of the alarm, which makes it easier for the alarm signal to be transmitted, so that the user can notice it, reduce the power consumption of the alarm, optimize the power consumption configuration of the infusion device, and save production costs.

[0066] Because the alarm is not enclosed within the control structure, compared to traditional enclosed alarm designs, when the alarm is an audio alarm, a low-volume sound is sufficient for the user to detect it, reducing energy consumption. When the alarm is a luminous alarm, the light emitted through the unenclosed area is more easily detected by the user, further reducing energy consumption. This is especially true when the outer shell 101 of the control structure 100 is made of a non-transparent material, where the light transmission effect is even more pronounced, further reducing energy consumption. When the alarm is a vibration alarm, the unenclosed area reduces the weight of the infusion device, requiring less power to generate vibration that the user can detect. Based on these reasons, when the alarm is a combination of audio, luminous, and vibration alarms, or a single alarm that combines multiple alarm signals such as light, sound, or vibration, the unenclosed design within the control structure 100 allows the alarm signals to pass through the unenclosed area, making them more easily detected by the user, further reducing power consumption, optimizing the power consumption configuration of the infusion device, and saving production costs.

[0067] Specifically, in this embodiment of the invention, the alarm is an audio alarm. Preferably, in this embodiment, the audio alarm is a buzzer 106, installed on a circuit board 107 within the control structure 100. The buzzer 106 emits sound and vibration alarm signals when the infusion begins or ends, when the infusion device malfunctions, when the medication is exhausted, or when the control structure 100 issues an erroneous command or receives an erroneous message, so that the user can be aware and make timely adjustments. More specifically, in this embodiment, the buzzer 106 is a piezoelectric buzzer. In this embodiment, the non-enclosed area on the housing 101 of the control structure 100 is at least one sound-permeable hole 105, facilitating the transmission of the sound alarm signal from the buzzer 106. As mentioned above, the shape, size, number, arrangement, and position of the sound-permeable holes 105 on the housing 101 are not limited and will not be described further here, as long as they allow sound to pass through. Preferably, in this embodiment, the sound-permeable holes 105 are a row of densely packed but separated small holes located on the side of the lower housing 101b. The diameter of the small hole is very small, smaller than the size of a typical water droplet, which prevents water droplets from entering the control structure 101. The position of the sound-transmitting hole 105 is adapted to the position of the buzzer 106, and its overall length span is slightly larger than the edge length of the buzzer 106, so that the audible alarm signal of the buzzer 106 can be transmitted more easily, reducing the power consumption of the buzzer, optimizing the power consumption configuration of the infusion device, and saving production costs.

[0068] To ensure a good seal and proper functioning of the buzzer, a waterproof and sound-permeable membrane 108 is provided between the sound-permeable hole 105 and the buzzer 106. Therefore, the waterproof and sound-permeable membrane needs a certain porosity to prevent water molecules from entering the buzzer while ensuring sound transmission. Specifically, in this embodiment of the invention, the waterproof and sound-permeable membrane 108 is composed of small pores with a diameter of 0.1-1 micrometer, achieving a waterproof and dustproof rating of IP68.

[0069] Compared with the traditional technical solution of enclosing the buzzer inside the control structure 100, the addition of the sound-permeable hole 105 and the waterproof sound-permeable membrane 108 allows the buzzer to be heard by the user with a smaller sound, reducing the energy consumption of the buzzer, optimizing the power consumption configuration of the infusion device, and saving production costs.

[0070] Figure 2a This is a three-dimensional structural diagram of the infusion structure 110 according to an embodiment of the present invention. Figure 2b This is a side view of the control structure 100 and the infusion structure 110 being assembled together according to an embodiment of the present invention. Figure 2c This is a top view of the lower housing of the infusion structure according to an embodiment of the present invention. Figure 2d This is a top view of the lower housing of the infusion structure according to another embodiment of the present invention.

[0071] The patch-type drug infusion device also includes an infusion structure 110. Its housing houses mechanical units, electrical control units, and other auxiliary units for completing drug infusion, which will be described in detail below. The housing of the infusion structure 110 may include multiple parts. As in this embodiment of the invention, the housing of the infusion device includes an upper housing 111a and a lower housing 111b.

[0072] As described above, in this embodiment of the invention, the infusion structure 110 is provided with a second engaging portion 112. The second engaging portion 112 is used to engage with the first engaging portion 102. Therefore, the positions of the first engaging portion 102 and the second engaging portion 112 correspond to each other.

[0073] In this embodiment of the invention, the infusion structure 110 is provided with a second electrical connection portion 113, which is used to electrically connect with a corresponding first electrical connection portion 103 to achieve electrical connection between the control structure 100 and the infusion structure 110. Specifically, the second electrical connection portion 113 comprises multiple second electrical contacts 113. The technical advantages of electrical contacts apply to both the first electrical contacts 103 on the control structure 100 and the second electrical contacts 113 on the infusion structure 110, which will not be described in detail here. The second electrical contacts 113 are used to press against the corresponding first electrical contacts 103 to achieve electrical connection between the control structure 100 and the infusion structure 110. The pressing between two electrical contacts with different structures can improve the reliability of the electrical connection. Similar to the first electrical contacts 103, the second electrical contacts 113 can also be rigid metal contacts or elastic conductive elements. Specifically, in this embodiment of the invention, the second electrical contact 113 is a conductive spring. Similarly, a conductive spring can improve the electrical connection performance. A groove is provided around the area where the second electrical contact 113 is located, and a seal 115 is provided in the groove.

[0074] Preferably, in this embodiment of the invention, the two ends of the conductive spring have different diameters, with a shorter diameter exposed outside the infusion structure 110 and a longer diameter inside the infusion structure 110. The longer diameter can keep the conductive spring inside the housing. Therefore, when the control structure 100 is not installed on the infusion structure 110, the longer diameter can prevent the conductive spring from falling off the infusion structure 110.

[0075] The embodiments of the present invention do not limit the position of the second electrical contact 113, as long as it can be electrically connected to the corresponding first electrical contact 103. Specifically, in the embodiments of the present invention, the bottom of the upper housing 111a of the infusion structure 110 includes a protrusion 114. The second electrical contact 113 is disposed on the protrusion 114, such as... Figure 2a As shown, the protrusion 114 corresponds to the recess 104 on the control structure 100, and the two can be assembled together so that the first electrical contact 103 and the corresponding second electrical contact 113 are pressed against each other, thereby realizing electrical connection.

[0076] In other embodiments of the present invention, the protrusion 114 may be disposed on the lower housing 111b, or when the housing of the infusion structure 110 is an integral unit, the protrusion 114 may be part of the integral housing, and no specific limitation is made here.

[0077] The control structure 100 and the infusion structure 110 are assembled in several ways, including pressing the control structure 100 onto the infusion structure 110 along its thickness direction, so that the first engaging portion 102 and the second engaging portion 112 engage with each other; or pressing the control structure 100 onto the infusion structure 110 along its length direction; or pressing the control structure 100 at any angle between the thickness direction and the length direction of the infusion structure 110, so that the first engaging portion 102 and the second engaging portion 112 engage with each other. Preferably, in this embodiment of the invention, the control structure 100 and the infusion structure 110 are assembled in such a way that the control structure 100 is pressed onto the infusion structure 110 along its thickness direction, so that the first engaging portion 102 and the second engaging portion 112 engage with each other, such as... Figure 2b The installation direction is shown.

[0078] In this embodiment of the invention, the lower housing 111b of the infusion structure 110 includes an outwardly extending portion 116, and a blocking block 117 is provided on the outer side of the extending portion 116, such as... Figure 2a As shown. As described above, when the control structure 100 is pressed to the engaged position along the thickness direction of the infusion structure 110, the blocking block 117 prevents the control structure 100 from falling off along the length direction of the infusion structure 110, ensuring the normal operation of the infusion device. Obviously, in other embodiments of the present invention, if the control structure 100 is pressed to the engaged position in other directions, adjusting the position of the blocking block 117 can also prevent the control structure 100 from falling off the infusion structure 110.

[0079] It should be noted here that "outward" and "outer side" are relative to the main body of the infusion structure 110, and are relative positional concepts. The positional relationship is as follows: Figure 2a or Figure 2b As shown. The meaning of "outer side" in the following text is the same as here.

[0080] In this embodiment of the invention, a pressing part 118 is also provided at the outer end of the extension 116 to release the blocking effect of the blocking block 117. When the user replaces the infusion structure 110, pressing the pressing part 118 with a finger will release the blocking block 117 from the control structure 100. The user can then use two fingers to remove the control structure 100 from the infusion structure 110.

[0081] This embodiment of the invention may also include an unlocking hole 119. The unlocking hole 119 is located on the inner side of the blocking block 117. While pressing the pressing part 118, the index finger can smoothly enter the unlocking hole 119, thereby pushing out the control structure 100 and separating the control structure 100 from the infusion structure 110. In this embodiment of the invention, the unlocking hole 119 is square. The square unlocking hole 119 facilitates the smooth entry of the finger. In other embodiments of the invention, the unlocking hole 119 may also be other shapes, and no specific limitation is made here.

[0082] The lower housing 111b of the infusion structure 110 is also provided with a crease groove 140. The crease groove 140 is located on both sides of the unlocking hole 119, such as... Figure 2c and Figure 2d As shown. After setting the crease groove 140, the thickness or width of the lower housing 111b at the position of the crease groove 140 (e.g.) Figure 2c and Figure 2d As indicated by the middle arrow, the lower housing 111b is thinned so that when the user presses the pressing part 118, it can be easily broken at the crease groove 140, thus more smoothly releasing the obstruction of the blocking block 117 on the control structure 100.

[0083] Preferably, in this embodiment of the invention, the crease grooves 140 are disposed at both ends of the blocking block 117, such as... Figure 2c As shown. In another embodiment of the invention, the crease groove 140 is provided on one side of the two corresponding sides of the unlocking hole 119, as shown. Figure 2d As shown.

[0084] The infusion structure 110 of this embodiment of the invention is further provided with an infusion needle unit 121 for infusing drugs subcutaneously.

[0085] The bottom of the lower housing 111b of the infusion structure 110 is also provided with medical tape 120 for attaching the infusion device to the user's skin surface.

[0086] Figures 3a-3b These are two perspective three-dimensional structural schematic diagrams of the internal structure 130 of the infusion structure 110 in an embodiment of the present invention.

[0087] In this embodiment of the invention, the internal structure 130 includes a mechanical unit and an electrical control unit for performing the infusion function, such as a drug storage cylinder 131, a drug outlet 132, a power supply 133, a drive wheel 134, a screw 135, and a circuit board 107 (e.g., ...). Figure 1c (as shown) and a drive unit (not shown), etc. The movement of the drive unit drives the drive wheel 134 to rotate, which in turn drives the screw 135 to push the piston 1313 (as shown) in the medicine storage cylinder 131. Figure 4 (As shown) movement to achieve drug infusion.

[0088] In this embodiment of the invention, the power supply 133 is a conventional button cell battery. In other embodiments of the invention, the power supply 133 can also be other types of batteries, as long as they can meet the requirements of supplying power to the infusion device. Preferably, in this embodiment of the invention, the power supply 133 is a dual-row battery, that is, two rows of batteries are respectively arranged on both sides of the drive wheel 134, such as... Figure 3b As shown. Conventionally, button cells have low discharge capacity. Using a dual-row design reduces the discharge level of each cell, extending battery life. Furthermore, the dual-row design of the power supply 133 fully utilizes the internal space of the infusion device, improving the integration of the internal structure.

[0089] In this embodiment of the invention, the infusion structure 110 also includes a circuit board or a three-dimensional circuit coated on a portion of the structural surface for supplying power to specific structural units. The circuit board can be a rigid circuit board or a flexible circuit board. Preferably, in this embodiment of the invention, the circuit board is a flexible circuit board. The flexible circuit board is malleable and its shape can be flexibly designed according to the internal space of the infusion structure 110. Simultaneously, multiple connection terminals can be provided on the flexible circuit board to be electrically connected to different second electrical contacts 113, thereby connecting the control structure 100 and the infusion structure 110, enabling the infusion device to perform its normal infusion function.

[0090] The infusion structure 130 also contains an elastic conductor 136. The elastic conductor 136 is electrically connected to the power supply 133 and specific connection terminals on the circuit board (or three-dimensional circuit), thereby enabling power supply to specific structural units.

[0091] Similar to elastic conductors, the type of elastic conductor 136 includes conductive springs, conductive sheets, conductive rubber, or conductive silicone, etc., and there are no specific limitations here, as long as it can meet the condition of electrically connecting the power supply 133 to a specific connection terminal on the circuit board (or three-dimensional circuit). Preferably, in this embodiment of the invention, the elastic conductor 136 is a conductive sheet. Obviously, since the delivery structure 110 has a dual-row battery, the elastic conductor 136 is also designed as a dual-row structure, such as... Figure 3a As shown.

[0092] The elastic conductor 136 enables direct electrical connection between the power supply 133 and a specific structural unit, reducing the need for internal wiring design and lowering the complexity of the internal structure.

[0093] Figure 4 This is a schematic diagram of the main internal structure of the infusion structure 110 in an embodiment of the present invention.

[0094] The main internal structure of the infusion structure 110 includes a drug storage unit 131, a piston 1313, a screw 135, a drive wheel 134, a drive unit (not shown), a reset unit 137, and a linear actuator 138. The drive unit includes a drive component 139 and a rotating shaft 1310. In embodiments of the present invention, the drive component 139 is connected to both the reset unit 137 and the linear actuator 138 (here, the connection includes mechanical or electrical connections).

[0095] The drug storage unit 131 is used to store drugs. Drugs include, but are not limited to, insulin, glucagon, antibiotics, nutrient solutions, analgesics, morphine, anticoagulants, gene therapy drugs, cardiovascular drugs, or chemotherapy drugs.

[0096] Piston 1313 is used to infuse liquid drugs into the body.

[0097] The screw 135 is connected to both the piston 1313 and the drive wheel 134. In this embodiment of the invention, the drive wheel 134 drives the screw 135 forward via rotation in a threaded manner, thereby pushing the piston 1313, which is located in the drug storage unit 131, forward to achieve the purpose of drug infusion. The screw 135 can be a rigid screw or a flexible screw. When the screw 135 is a flexible screw, it can be designed to be curved. In one embodiment of the invention, the flexible screw is formed by multiple threaded sub-units connected movably.

[0098] The circumferential surface of the drive wheel 134 is provided with teeth 1341. The teeth 1341 are either gear teeth or ratchet teeth. Specifically, in this embodiment of the invention, the teeth 1341 are ratchet teeth. Ratchet teeth are easier to drive, improving driving efficiency.

[0099] The drive component 139 includes a drive end 1391 for driving the gear teeth 1341, thereby driving the drive wheel 134 to rotate. The drive component 139 is movably connected to the rotating shaft 1310.

[0100] The reset unit 137 and the linear driver 138 cooperate to cause the drive component 139 to reciprocate around the rotating shaft 1310, as shown below. Figure 4 As shown in the R direction, the drive end 1391 moves in the forward and reset directions. With one reciprocating rotation, the drive end 1391 pushes the drive wheel 134 forward by one tooth's distance, the drive wheel 134 drives the screw 135 forward by one step, and thus pushes the piston 1313 to complete one drug infusion.

[0101] It should be noted here that the forward direction of the drive end 1391 refers to the direction in which it pushes the gear tooth 1341 to move. The reset direction of the drive end 1391 is opposite to the forward direction. During reset, the drive end 1391 only slides on the surface of the gear tooth 1341 and does not push.

[0102] In some embodiments of the present invention, the reset unit 137 includes elastic elements such as springs, spring sheets, elastic plates, elastic rods, and elastic reset rubber. Here, springs include compression springs, tension springs, or torsion springs, and the term "spring" in the following text has the same meaning. Specifically, in this embodiment, the reset unit 137 is a torsion spring. Torsion springs are more conducive to the reset rotation of the driving component 139. In some embodiments of the present invention, the reset unit 137 can also be an elastic conductive element, such as a metal spring or conductive rubber. In other embodiments of the present invention, the reset unit 137 further includes an electrically driven linear actuator or an electrically heated linear actuator, such as a shape memory alloy. The embodiments of the present invention do not impose specific limitations on the type, material selection, or position of the reset unit 137, as long as it satisfies the condition of causing the driving component 139 to rotate in the reset direction.

[0103] When energized, the physical state of linear actuators such as shape memory alloys changes; the shape memory alloy contracts and deforms, outputting power. The greater the current, the greater the contraction deformation of the shape memory alloy, and the greater the power. Clearly, when the current is constant, the power output of the shape memory alloy is constant. Therefore, linear actuators such as shape memory alloys can output stable and controllable power.

[0104] The linear actuator 138 is an electrically driven linear actuator or an electrically heated linear actuator. By alternately switching power on and off, the linear actuator 138 outputs or stops outputting power. Specifically, in this embodiment of the invention, the linear actuator 138 is a shape memory alloy.

[0105] Figures 5a-5c These are schematic diagrams showing the drive component 139 in its initial, half-stroke, and full-stroke positions, respectively.

[0106] In this embodiment of the invention, the infusion device is further provided with baffles 1311 and 1312 that can limit the forward position of the driving component 139. Baffle 1311 is a half-stroke baffle, and baffle 1312 is a full-stroke baffle. When the driving component 139 is in the initial position, the driving component 139 is not in contact with the baffle. When the driving component 139 is in the half-stroke position, the driving component 139 is in contact with the baffle 1311. When the driving component 139 is in the full-stroke position, the driving component 139 is in contact with the baffle 1312. When the driving component 139 is in contact with the baffle 1311 or 1312, the potential changes. The electrical signal generated by the potential change is transmitted to the control structure 100 through a wire. The control structure 100 determines whether the driving unit has reached the end point of the selected infusion mode. In this embodiment of the invention, the drive wheel 134 drives the screw 135 to advance one step, and the infusion unit completes the infusion of one unit of drug. In one reciprocating motion, when the end point of the drive unit's motion is the contact point between the drive unit and the half-length retaining wall 1311, the infusion of 1 / 2 unit of drug can be achieved. The rotation amplitude of the drive component 139 is precisely controlled, the infusion accuracy is improved, and the requirements of users or patients for different infusion accuracies can be met.

[0107] Specifically, when the linear actuator 138 pulls the drive component forward and contacts the half-stroke retaining wall 1311, a first electrical signal is triggered. The drive end 1391 pushes the drive wheel 134 forward by 1 / 2 tooth distance. The drive wheel 134 drives the screw 135 forward by 1 / 2 step length. The first electrical signal is transmitted to the control structure 100 to determine whether the drive unit has reached the end point of the selected infusion mode. When the highest accuracy requirement in the selected infusion mode is 1 / 2 unit infusion volume, the control structure 100 controls the linear actuator 138 to stop outputting power, and the drive unit is reset under the action of the reset unit. When the highest accuracy requirement in the selected infusion mode is 1 unit infusion volume, the control structure 100 controls the linear driver 138 to continue outputting power. When the linear driver 138 pulls the drive component forward, squeezes the half-length retaining wall 1311, and contacts the full-length retaining wall 1312, a second electrical signal is triggered. The drive end 1391 pushes the drive wheel 134 forward by another 1 / 2 tooth distance. The drive wheel 134 drives the screw 135 forward by another 1 / 2 step. The control structure 100 controls the linear driver 138 to stop outputting power, and the drive unit is reset under the action of the reset unit.

[0108] In this embodiment of the invention, when infusing insulin, if the unit infusion volume is 0.001U, then 0.0005U and 0.001U can be infused in one reciprocating motion. Correspondingly, when the selected infusion mode requires 0.0015U, the infusion can be completed by controlling one full reciprocating motion and one half reciprocating motion of the drive unit. Of course, when the selected infusion mode requires 0.001U*n+0.0005U, the infusion can be completed by controlling n full reciprocating motions and one half reciprocating motion of the drive unit.

[0109] In another embodiment of the invention, the number of baffles can be three, namely, a 1 / 3-stage baffle, a 2 / 3-stage baffle, and a full-stage baffle. This allows for the infusion of 1 / 3 of the infusion volume in a single infusion process, further precisely controlling the rotation amplitude of the drive component 139, improving infusion accuracy, and meeting the user's or patient's requirements for different infusion accuracies. Similarly, the number of baffles can be four or more (n≥4). Correspondingly, the infusion accuracy can be improved to 1 / n of the infusion volume. Theoretically, the larger n is, the higher the infusion accuracy, and the better it can meet the different user's or patient's requirements for different infusion accuracies. However, due to the requirement for miniaturization of the infusion device, too many baffles would increase the size of the infusion device and increase the design difficulty. Therefore, the number of baffles is preferably 2-3.

[0110] In this embodiment of the invention, the baffles 1311 and 1312 are arranged on the same side of the drive unit, the reset unit 137 is an elastic element or an elastic conductive element, the other side of the drive unit is not provided with a baffle, the rotation endpoint of the drive component 139 on the other side is determined by the reset unit, or one or two baffles can be provided on the other side of the drive unit, and the reset unit and the baffles jointly drive the movement endpoint of the component 139 on the other side.

[0111] In another embodiment of the present invention, the reset unit 137 is an electrically driven linear actuator or an electrically heated linear actuator, such as a shape memory alloy, etc. The baffles 1311 and 1312 are arranged on the same side of the drive unit, and two baffles are also arranged on the other side of the drive unit to restrict the rotation endpoint of the drive component 139 on the other side. Alternatively, only one baffle can be arranged on the other side of the drive unit, and the other rotation endpoint of the drive component 139 on the other side is controlled by the control structure 100. Alternatively, no baffle can be arranged on the other side of the drive unit, and the rotation endpoint of the drive component 139 on the other side is entirely controlled by the control structure 100.

[0112] Similarly, in this embodiment of the invention, when there are more than two retaining walls on one side of the drive unit, the number of retaining walls on the other side of the drive unit is not specifically limited, as long as the movement endpoint of the drive component 139 on the other side can be controlled.

[0113] In this embodiment of the invention, the baffle is an elastic conductive component, such as a conductive spring, conductive sheet, conductive rubber, or conductive silicone. Preferably, in this embodiment, the baffle is a pogo pin. Baffle 1311 is arranged horizontally (in the direction of the drive screw 135), and baffle 1312 is arranged vertically (perpendicular to the bottom surface of the infusion device). This fully utilizes the internal space of the infusion device and optimizes its structural layout. The end of baffle 1311 is closer to the drive unit than the end of baffle 1312 so that it can smoothly contact the drive unit sequentially to determine the endpoint of the drive component 139's movement and trigger an electrical signal to achieve high-precision infusion. In other embodiments of the invention, the structure, material, and arrangement of the baffles are not specifically limited, as long as they can contact the drive unit to determine the endpoint of the drive component 139's movement and trigger an electrical signal to achieve high-precision infusion.

[0114] In summary, this invention discloses a patch-type drug infusion device. The infusion structure is equipped with at least two baffles, which can precisely control the rotation amplitude of the drive component, improve the infusion accuracy of the infusion device, and allow the user or closed-loop system to arbitrarily select a suitable infusion mode to precisely control the body fluid level, meet user needs, and improve the user experience.

[0115] While specific embodiments of the invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. A patch-type drug infusion device, characterized in that, include: A control structure, wherein the control structure is provided with a first engaging portion and a first electrical connection portion exposed on the surface of the control structure; and The infusion structure includes a housing, and is provided with a second electrical connection portion exposed on the surface of the housing and a second engagement portion cooperating with a first engagement portion. When the control structure and the infusion structure are assembled together, the first engagement portion and the second engagement portion engage with each other, and the first electrical connection portion is electrically connected to the corresponding second electrical connection portion, thereby electrically connecting the control structure and the infusion structure; the infusion structure further includes: A drug storage unit, a piston, and a screw, wherein the piston is disposed in the drug storage unit and the piston is connected to the screw; A drive unit, comprising a rotating shaft and a drive component with a drive end, wherein the drive component rotates about the rotating shaft to cause the drive end to advance or return to its original position; The drive wheel is provided with teeth, and the forward-moving drive end pushes the teeth to rotate the drive wheel, thereby driving the screw forward; A linear driver and a reset unit are respectively connected to the driving component, the linear driver and the reset unit respectively applying forces to the driving component to cause the driving end to advance and reset respectively; and At least two retaining walls are provided on the same side of the drive unit to limit the forward position of the drive unit and control the rotation amplitude of the drive component.

2. The patch-type drug infusion device according to claim 1, characterized in that, The retaining wall is an elastic conductive component.

3. The patch-type drug infusion device according to claim 2, characterized in that, The elastic conductive component includes a conductive spring, a conductive sheet, conductive rubber, or conductive silicone.

4. The patch-type drug infusion device according to claim 1, characterized in that, The reset unit includes an electrically driven linear actuator, an electrically heated linear actuator, or an elastic element.

5. The patch-type drug infusion device according to claim 4, characterized in that, It also includes at least one retaining wall disposed on the other side of the drive unit.

6. The patch-type drug infusion device according to claim 5, characterized in that, It also includes a control unit, which, together with at least one retaining wall disposed on the other side of the drive unit, controls the endpoint of the movement of the drive component.

7. The patch-type drug infusion device according to claim 1, characterized in that, It also includes a non-enclosed buzzer disposed within the control structure.

8. The patch-type drug infusion device according to claim 7, characterized in that, The outer casing of the control structure is provided with sound-permeable holes.

9. The patch-type drug infusion device according to claim 8, characterized in that, The housing of the control structure includes an upper housing and a lower housing, and the sound-permeable hole is disposed on the lower housing.

10. The patch-type drug infusion device according to claim 9, characterized in that, A waterproof and sound-permeable membrane is provided between the buzzer and the sound-permeable hole.

11. The patch-type drug infusion device according to claim 1, characterized in that, The first engaging part and the second engaging part are one or more of the following: a hook, a block, a hole, and a slot that cooperate with each other.

12. The patch-type drug infusion device according to claim 11, characterized in that, The first electrical connection portion and the second electrical connection portion are a plurality of first electrical contacts and a plurality of second electrical contacts.

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

14. The patch-type drug infusion device according to claim 13, characterized in that, The types of elastic conductive components include conductive springs, conductive sheets, conductive rubber, or conductive silicone.

15. The patch-type drug infusion device according to claim 14, characterized in that, The first electrical contact is a rigid metal contact, the second electrical contact is a conductive spring, and grooves are provided around the perimeter of the multiple second electrical contact areas, with a sealing element provided in the groove.

16. The patch-type drug infusion device according to claim 15, characterized in that, The infusion structure is provided with different connection ends, and the compressed conductive springs are electrically connected to the corresponding connection ends.

17. The patch-type drug infusion device according to claim 16, characterized in that, The infusion structure also includes a flexible circuit board, and the connection end is disposed on the flexible circuit board.

18. The patch-type drug infusion device according to claim 1, characterized in that, The housing includes an upper housing and a lower housing.

19. The patch-type drug infusion device according to claim 18, characterized in that, The lower housing includes an outward extension, and a blocking block is provided on the outer side of the extension.

20. The patch-type drug infusion device according to claim 19, characterized in that, A pressing part is provided at the outer end of the extension.

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