Patch-type insulin pump and insulin injection system

Abstract

The present application relates to the technical field of medical instruments, and discloses a patch-type insulin pump, and an insulin injection system and a method for using same. The patch-type insulin pump comprises an insulin injection module, a power module, and an injected insulin measurement module. The insulin injection module comprises an insulin storage tank, a push rod piston, and two conductive push rods. An insulin injection port is provided at the bottom of the insulin storage tank, and an opening is provided at the top of the insulin storage tank; the push rod piston sealingly covers the opening, and can move relative to the insulin storage tank in a first direction; and the two conductive push rods are separately connected to the push rod piston. The injected insulin measurement module comprises a control circuit board, two conductive elastic contact pieces, and a conductive module; the two conductive elastic contact pieces are separately electrically connected to the control circuit board; and the two conductive push rods are respectively in sliding contact with the two conductive elastic contact pieces. The power module is used for driving the conductive module to move in the first direction, and the control circuit board is used for measuring, on the basis of the distance the conductive module moves, the amount of an insulin injected into the insulin storage tank. The patch-type insulin pump can measure the amount of the insulin injected by the patch-type insulin pump.

Description

[0001] This application relates to the field of medical device technology, and particularly to a patch-type insulin pump and insulin injection system. Background Art Currently, patch-type insulin pumps can automatically inject and push medication. To ensure accurate dosage, users need to pre-fill the insulin reservoir from the standard vial according to the instructions before injection. However, due to human error, users may not follow the instructions when injecting medication into the reservoir, resulting in insufficient or excessive dosage (a / leakage at the needle, not fully injected; b / worn or missing syringe markings, insufficient dosage; c / accidental damage to the reservoir, leakage) or excessive dosage (injecting the standard dosage recommended by the doctor), thus adversely affecting treatment. Current patch-type insulin pumps lack the ability to detect the injected medication volume, impacting the user experience. This application provides a patch-type insulin pump and insulin injection system capable of detecting the injected medication volume, enabling users to administer medication accurately. In a first aspect, this application provides a patch-type insulin pump, including an infusion module, a power module, and an infusion detection module. The infusion module includes a drug reservoir, a piston rod, and two conductive push rods. The drug reservoir has an infusion port at its bottom and an opening at its top. The piston rod seals over the opening and is movable relative to the drug reservoir along a first direction to change the drug storage space within the reservoir. The first direction is the arrangement direction of the bottom and top of the drug reservoir. The two conductive push rods are respectively connected to the side of the piston rod away from the infusion port. Each conductive push rod extends along the first direction, and the two conductive push rods are parallel and spaced apart. The infusion detection module includes a control circuit board, two conductive contact springs, and a conductive module. The two conductive contact springs are spaced apart and electrically connected to the control circuit board. The two conductive push rods slide in contact with the two conductive contact springs. The power module drives the conductive module to move along the first direction. This ensures that both ends of the conductive module are in contact with the two conductive push rods respectively; the control circuit board is used to detect the amount of medication injected into the drug reservoir based on the distance the conductive block moves. The patch-type insulin pump provided in this application is equipped with a medication detection module for detecting the amount of medication injected into the drug reservoir.Specifically, firstly, two conductive contact springs connected to the control circuit board are positioned to contact two conductive push rods, and a conductive module is installed. The conductive push rods maintain contact with the conductive contact springs throughout their movement. When the two conductive push rods are not in contact with the conductive module, the circuit formed between the control circuit board, conductive contact springs, conductive push rods, and conductive module is open. When the conductive module moves to contact the conductive push rod, the circuit closes, generating a continuous electrical signal. When the user injects medication into the storage tank, the push rod piston and conductive push rod move towards the conductive module under the force of the medication. Then, the control circuit board controls the conductive module to move towards the conductive push rod until they contact each other, generating an electrical signal. The control circuit board can calculate the moving distance of the conductive module based on the time it takes for the electrical signal to be generated. Then, based on the moving distance of the conductive module from its initial state to when it contacts the conductive push rod, the control circuit board can calculate the moving distance of the push rod piston during medication injection, and thus calculate the amount of medication injected by the user. The patch-type insulin pump in this application, by setting up a drug injection detection module, can detect the amount of medication injected by the user, ensuring accurate medication administration and thus improving the user experience. In some possible implementations, the power module includes a lead screw, a slider, and a drive module; the lead screw extends along the first direction, and the drive module drives the lead screw to rotate around its own axis; the slider is drively connected to the lead screw, so that when the lead screw rotates around its own axis, it drives the slider to move along the first direction; the conductive module is fixed to the slider. In some possible implementations, the power module also includes a bracket, and the lead screw is rotatably mounted on the bracket relative to the bracket around its own axis; the bracket has guide holes corresponding to the two conductive push rods, each conductive push rod passing through the corresponding guide hole, and the lead screw is located between the two conductive push rods. In some possible implementations, the bracket is made of a non-conductive material, the conductive module is arranged circumferentially around the lead screw, and there is a gap between the conductive module and the lead screw. In some possible implementations, the drive module includes a stepper motor. In some possible implementations, the conductive module is a conductive cloth, or the conductive module is made of metal. In some possible implementations, the conductive push rod is made of metal, and the conductive contact spring is made of metal. In some possible implementations, the control circuit board is further configured to drive the conductive module to move along the first direction to a preset position according to a set dosage.In some possible implementations, a buzzer alert module is also included, which is used to issue a buzzer alarm when the conductive module moves to a preset position. Secondly, this application provides an insulin injection system, including an operating device and a patch insulin pump as described in any possible implementation of the first aspect, wherein the control circuit board is signal-connected to the operating device to receive signals sent by the operating device and control the power module to operate according to the signals sent by the operating device. Brief Description of the Drawings: Figure 1 is a schematic diagram of an overall structure of a patch insulin pump in an embodiment of this application; Figure 2 is a schematic diagram of an exploded structure of a patch insulin pump in an embodiment of this application; Figure 3 is a schematic diagram of a cross-sectional structure of a patch insulin pump in an embodiment of this application after the user has injected medication; Figure 4 is a schematic diagram of a cross-sectional structure of the patch insulin pump in Figure 3 when detecting the amount of medication injected; Figure 5 is a schematic diagram of a cross-sectional structure of the insulin pump in an embodiment of this application when performing medication dosage control. Reference Numerals:

[0002] 100 - Injection module; 110 - Storage tank; 111 - Injection port; 120 - Push rod piston; 130 - Conductive push rod; 200 - Power module; 210 - Stepper motor; 220 - Transmission module; 230 - Bracket; 231 - First support frame; 232 - Second support frame; 233 - Connecting plate; 240 - Lead screw; 250 - Slider; 300 - Injection detection module; 310 - Control circuit board; 320 - Conductive contact spring; 330 - Conductive module. Detailed Description The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. The insulin injection system provided in this application includes an operating device and a patch insulin pump. The operating device can be used to control the patch insulin pump to detect the amount of medication injected into the patch insulin pump and to achieve automatic injection. In practical applications, the operating device can be, for example, an operating program set on a smartphone. The user controls the patch insulin pump by clicking different options in the operating program. The patch insulin pump described above will be described in detail below with reference to specific embodiments. Referring to FIG1, the patch insulin pump in this embodiment may include a drug injection module 100, a power module 200, and a drug injection detection module 300. The user can inject the medication from the vial into the drug injection module 100, and then inject the medication into the body through the drug injection module 100. The power module 200 and the drug injection detection module 300 can be used to detect the amount of medication injected. The power module 200 can also be used to inject the medication in the drug injection module 100 into the user's body. Specifically, referring to Figure 2, the drug dispensing module 100 may include a drug storage tank 110, a pusher piston 120, and two conductive pushers 130. The bottom of the drug storage tank 110 is provided with a drug dispensing port 111 that communicates with the interior of the drug storage tank 110. The user can inject the medicine from the medicine bottle into the drug storage tank 110 through the drug dispensing port 111. The top of the drug storage tank 110 is provided with an opening, and the pusher piston 120 is sealed at the opening. At this time, the bottom of the pusher piston 120 cooperates with the space inside the drug storage tank 110 to form a drug storage space. The pusher piston 120 can also ensure that the medicine in the drug storage space will not flow out from the opening.Let the first direction be the arrangement direction from top to bottom of the medicine storage tank 110, and the second direction be the arrangement direction from bottom to top of the medicine storage tank 110. The push rod piston 120 can also move relative to the medicine storage tank 110 along the first direction to change the size of the medicine storage space. Two conductive push rods 130 can be respectively connected to the side of the push rod piston 120 away from the injection port 111. Each conductive push rod 130 can extend along the first direction, and the two conductive push rods 130 can be spaced apart. In the initial state, the bottom of the push rod piston 120 can contact the bottom wall. When the user injects the medicine into the medicine storage tank 110 through the injection port 111, the push rod piston 120 moves away from the injection port 111 under the push of the medicine, and at the same time, it drives the conductive push rod 130 to move away from the injection port 111. Referring again to Figure 2, the drug injection detection module 300 may include a control circuit board 310, two conductive contact springs 320, and a conductive module 330. The two conductive contact springs 320 are electrically connected to the control circuit board 310. For example, the conductive contact springs 320 can be fixed to the control circuit board 310 by welding, screw fastening, keying, laser welding, or by connecting through electrical connection elements. The two conductive contact springs 320 are spaced apart, and each of the two conductive contact springs 320 slides in contact with the two conductive push rods 130. That is, each conductive push rod 130 maintains contact with the conductive contact spring 320 during its movement in the first direction. The conductive contact springs 320 may have a certain elasticity. When the conductive push rod 130 moves relative to the conductive contact springs 320, the conductive contact springs 320 can deform and store force, thereby ensuring that the conductive contact springs 320 and the conductive push rods 130 remain in contact. The conductive module 330 is located on the side of the conductive push rod 130 opposite to the push rod piston 120. The conductive module 330 is connected to the power module 200. The power module 200 can drive the conductive module 330 to move along a first direction until the conductive module 330 simultaneously contacts both conductive push rods 130. At this time, the control circuit board 310, the two conductive contact springs 320, the two conductive push rods 130, and the conductive module 330 form a closed loop, and the current in the loop can flow normally, thereby generating a continuous electrical signal. The control circuit board 310 is signal-connected to the power module 200. The control circuit board 310 can receive the electrical signal and generate a signal for controlling the working state of the power module 200, thereby driving the power module 200 to start or stop working.Referring again to Figure 2, the power module 200 includes a drive module (refer to reference 210 in Figure 2), a transmission module 220, a bracket 230, a lead screw 240, and a slider 250. The lead screw 240, drive module, and transmission module 220 can all be mounted on the bracket 230 to ensure the overall stability of the power module 200. Specifically, the bracket 230 may include a first support frame 231 and a second support frame 232 arranged in parallel, and a connecting plate 233 connecting the first support frame 231 and the second support frame 232, so that the bracket 230 has an overall U-shaped structure. The drive module can be fixed to the connecting plate 233. The transmission module 220 is fixed to the side of the first support frame 231 opposite to the second support frame 232. The lead screw 240 extends along the first direction, that is, the axial direction of the lead screw 240 is consistent with the first direction. Furthermore, the two ends of the lead screw 240 pass through the first support frame 231 and the second support frame 232 respectively. Further, the slider 250 can be sleeved on the lead screw 240 and is connected to the lead screw 240 in a transmission manner. In addition, the conductive module 330 can be fixed to the side of the slider 250 facing the conductive push rod 130. In this embodiment, the drive module and the transmission module 220 are connected in a transmission manner, and the transmission module 220 is connected to the end of the lead screw 240 that passes through the first support frame 231 in a transmission manner. Thus, the power output by the drive module can be transmitted to the lead screw 240 through the transmission module 220, thereby driving the lead screw 240 to rotate relative to the bracket 230 around its own axis. When the lead screw 240 rotates, it drives the slider 250 to move in the first direction, thereby causing the conductive module 330 to move in the first direction. The conductive module 330 is arranged circumferentially around the lead screw 240, and there is a gap between the conductive module 330 and the lead screw 240 to ensure that there is no contact between the conductive module 330 and the lead screw 240. For example, the conductive module 330 can be in the shape of a "U" or a U-shape so that the lead screw 240 can pass through the hollow part of the conductive module 330 and make a transmission connection with the slider 250. The second support frame 232 is provided with guide holes (not shown in the figure) corresponding to the two conductive push rods 130 one by one. Each conductive push rod 130 can be inserted into the corresponding guide hole. At this time, the lead screw 240 is located between the two conductive push rods 130, and the lead screw 240 is spaced apart from each conductive push rod 130. When the conductive module 330 moves along the first direction, it can avoid the lead screw 240 and contact the two conductive push rods 130, thereby forming a closed circuit.In this embodiment, the conductive module 330 may be, for example, but not limited to, conductive cloth, or the conductive module 330 may be made of metal to ensure good conductivity. Similarly, the conductive push rod 130 may be made of metal, which not only ensures good conductivity but also increases its strength, preventing deformation during movement and ensuring proper contact with the conductive module 330. Likewise, the conductive contact spring 320 may also be made of metal to ensure good conductivity between the conductive push rod 130 and the conductive contact spring 320. It is worth noting that the bracket 230 and slider 250 in this embodiment may both be made of non-conductive materials. When the conductive push rod 130 moves along the first direction, it will not generate an electrical signal upon contact with the bracket 230 or slider 250, thus preventing interference with the operation of the control circuit board 310. Therefore, the patch-type insulin pump in this embodiment can not only detect the dosage but also improve the accuracy of the dosage detection. To facilitate the calculation of the dosage injected into the storage tank 110, as shown in Figure 2, the drive module can be a stepper motor 210. In this case, the moving distance of the conductive module 330 can be calculated by the total number of rotations of the output shaft of the stepper motor 210 (e.g., when the total moving distance of the conductive module 330 is 10.00mm, the stepper motor 210 needs to rotate 8000 times, so the displacement of the conductive module 330 is 0.00125mm for one rotation of the stepper motor 210. After the drive module detects the number of rotations C of the stepper motor 210, the total displacement L of the conductive module 330 is L = C * 0.00125mm), which is simple and convenient. Furthermore, the internal storage space of the medicine storage tank 110 has a regular three-dimensional shape, such as a square or cylindrical structure, so that the amount of medicine injected into the medicine storage tank 110 can be calculated from the movement distance of the push rod piston 120. Specifically, when both the injection module 100 and the injection detection module 300 are in the initial state, the bottom of the push rod piston 120 is in contact with the inner wall of the medicine storage tank 110, indicating that there is no medicine in the medicine storage tank 110 and the amount of medicine stored in the medicine storage tank 110 is 0. At this time, the conductive module 330 and the conductive push rod 130 are out of contact, and the conductive push rod 130 is at the position furthest from the conductive module 330.Then, the conductive module 330 is driven to move towards the conductive push rod 130 until it contacts the conductive push rod 130. The total moving distance of the conductive module 330 along the first direction is Lo. When the piston push rod is in the middle position inside the medicine storage tank 110, it indicates that there is a certain amount of medicine in the medicine storage tank 110. At this time, when the conductive module 330 moves towards the conductive push rod 130 until it contacts the conductive push rod 130, the distance that the conductive module 330 moves along the first direction is L1. Then, the moving distance of the push rod piston 120 inside the medicine storage tank 110 is L2. That is to say, the height of the injected medicine is h=L2=L-Ll. At this time, the amount of medicine injected can be calculated according to the shape of the medicine storage tank 110 by using the formula (e.g., if the cross-sectional area of ​​the medicine storage tank 110 is S and the height of the injected medicine is L2, the total volume V of the injected medicine can be obtained by using the volume formula V=S*h=S*L2). In specific implementation, when the user downloads the corresponding operating program on the smartphone... The operating program and the control circuit board 310 can be connected via wired or wireless means (e.g., via Bluetooth). Referring to Figures 3 and 4, with both the injection module 100 and the injection detection module 300 in their initial states, the user injects the medicine from the medicine bottle into the storage tank 110 through the injection port 111. The pusher piston 120 moves away from the injection port 111 along direction A in Figure 3 under the force of the medicine, until the user completes the injection, at which point the pusher piston 120 stops moving and remains stationary. At this point, the user can click the "Injection Complete" option in the operating program. The operating program sends the corresponding signal M to the control circuit board 310. The control circuit board 310 generates a signal N based on the received signal M, which drives the conductive module 330 to move towards the conductive pusher 130 using the power module, and sends this signal N to the stepper motor 210. After receiving signal N, stepper motor 210 starts working, driving slider 250 and conductive module 330 to move towards conductive push rod 130 along direction B in Figure 4 until both ends of conductive module 330 contact the two conductive push rods 130 respectively. At this time, the current at point a in Figure 4 flows along conductive push rod 130 and conductive module 330 to point b, generating a continuous electrical signal P. Control circuit board 310 receives electrical signal P and generates signal Q to control stepper motor 210 to stop working based on electrical signal P. Signal Q is then sent back to stepper motor 210 to stop stepper motor 210 working.The control circuit board 310 can calculate the moving distance of the conductive module 330 along the B direction based on the total number of rotations of the output shaft during the time interval from sending the N signal to the stepper motor 210 to the stepper motor 210 receiving the P signal and stopping, thereby detecting the amount of medicine injected into the medicine tank 110. Finally, the control circuit board 310 sends the injected medicine amount generation signal to the operating program and displays it on a smartphone, making it convenient for the user to view the injected medicine amount. In some embodiments, the control circuit board 310 in this embodiment can also perform medicine dosage control, that is, control the amount of medicine injected by the user, so that the user can use the medicine accurately. Specifically, as shown in Figure 5, the control circuit board 310 can calculate the total number of rotations of the stepper motor 210, C = L / 0.00125, based on the preset dosage V ml, the known cross-sectional area of ​​the medicine storage tank 110 is S, and the required displacement L = V / S for the conductive module 330. At this point, the pusher piston 120 is in its initial state. When injecting a fixed amount of medicine into the medicine storage tank 110, the pusher piston 120 moves a distance h1 within the medicine storage tank 110. Then, based on the distance h2 that the conductive module 330 moves towards the conductive pusher 130 to contact it when both the injection module 100 and the injection detection module 300 are in their initial states, the distance h = h2 - h1 is calculated to move the conductive module 330 from its initial position to the preset position. In other words, in this embodiment, the conductive module 330 can be moved towards the conductive pusher 130 to the preset position first. Then, medication is injected into the storage tank 110. Under the pushing force of the medication, the conductive push rod 130 moves until it contacts the conductive module 330. At this point, the conductive push rod 130 cannot move further, and the injection stops, thus ensuring that the amount of medication injected into the storage tank 110 is constant. Based on this, the patch insulin pump in this embodiment can also be equipped with a buzzer reminder module (not shown in the figure). The buzzer reminder module is connected to the control circuit board 310. When the conductive module 330 contacts the conductive push rod 130, the control circuit board 310 can generate a signal T. After receiving the signal T, the buzzer reminder module can sound an alarm, thereby reminding the user that the injection is complete. In specific implementation, referring to Figure 5, the user can first input the preset amount of medication in the operation program. The operation program generates a corresponding signal U for the preset amount of medication and sends the signal U to the control circuit board 310.The control circuit board 310 calculates the distance h that the conductive module 330 needs to move based on the preset dosage, generates a signal V, and sends signal V to the stepper motor 210 to drive the stepper motor 210 to move the conductive module 330 to the preset position h along direction C in Figure 5. At this point, the stepper motor 210 stops working. Then, the user injects the medicine into the medicine storage tank 110 through the injection port 111. The medicine pushes the push rod piston 120 towards the conductive module 330 until it contacts the conductive module 330. At this time, the current at point a flows along the conductive push rod 130 and the conductive module 330 to point b, generating a continuous electrical signal W. The control circuit board 310 receives this electrical signal W and generates a signal T based on the electrical signal W, causing the buzzer reminder module to sound an alarm, reminding the user that the required volume of medicine has been injected. At the same time, the user cannot push the conductive module 330 to move, thus ensuring that the user injects the accurate required dosage. Obviously, those skilled in the art can make various modifications and variations to the embodiments of the present invention without departing from the spirit and scope of the invention. Therefore, if these modifications and variations fall within the scope of the claims of the present invention and their equivalents, the present invention also intends to include these modifications and variations.

Claims

Claims 1. A patch-type insulin pump, characterized by, The system includes a drug injection module, a power module, and a drug injection detection module. The drug injection module comprises a drug storage tank, a pusher piston, and two conductive pushers. The drug storage tank has a drug injection port at its bottom and an opening at its top. The pusher piston is sealed to the opening and can move relative to the drug storage tank along a first direction to change the drug storage space within the tank. The first direction refers to the arrangement of the bottom and top of the drug storage tank. The two conductive pushers are respectively connected to the side of the pusher piston away from the drug injection port. Each conductive pusher extends along the first direction, and the two conductive pushers are parallel and spaced apart. The drug injection detection module includes a control circuit board, two conductive contact springs, and a conductive module. The two conductive contact springs are spaced apart and electrically connected to the control circuit board. The two conductive pushers slide in contact with the two conductive contact springs. The power module drives the conductive module to move along the first direction, so that both ends of the conductive module contact the two conductive pushers. The control circuit board is used to detect the amount of medicine injected into the medicine storage tank based on the distance the conductive block moves.

2. The patch pump according to claim 1, characterized in that The power module includes a lead screw, a slider, and a drive module; the lead screw extends along the first direction, and the drive module is used to drive the lead screw to rotate around its own axis; the slider is connected to the lead screw so that when the lead screw rotates around its own axis, it drives the slider to move along the first direction; the conductive module is fixed to the slider.

3. The patch pump according to claim 2, characterized in that The power module also includes a bracket, and the lead screw is rotatably mounted on the bracket about its own axis relative to the bracket; the bracket is provided with guide holes corresponding one-to-one with the two conductive push rods, each of the conductive push rods... The rod passes through the corresponding guide hole, and the lead screw is located between the two conductive push rods.

4. The patch pump according to claim 3, characterized in that The bracket is made of a non-conductive material, the conductive module is arranged around the circumference of the lead screw, and there is a gap between the conductive module and the lead screw.

5. The patch pump of claim 2, wherein The drive module includes a stepper motor.

6. The patch pump of claim 1, wherein The conductive module is made of conductive cloth, or the conductive module is made of metal.

7. The patch pump of claim 1, wherein The conductive push rod is made of metal, and the conductive contact spring is made of metal.

8. The patch pump of claim 1, wherein The control circuit board is also used to drive the conductive module to move along the first direction to a preset position according to the set injection volume.

9. The patch pump of claim 8, wherein the housing is configured to be worn on the abdomen of the user. It also includes a buzzer alert module, which is used to issue a buzzer alarm when the conductive module moves to a preset position.

10. An insulin injection system, characterised in that The device includes an operating device and a patch-type insulin pump according to any one of claims 1 to 9, wherein the control circuit board is signal-connected to the operating device for receiving signals sent by the operating device and controlling the power module to operate according to the signals sent by the operating device.

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