An insulin pen

Abstract

The utility model discloses an insulin pen, including pen body, pen core frame, pen core, needle and cap, this insulin pen still includes magnetic block, hall sensor, shell, singlechip module, set button, alarm module and power module, the magnetic block sets up in the piston, and the hall sensor sets up at the bottom of scale window of pen core frame, is used for detecting the change of magnetic field intensity, and produces voltage signal, the shell sets up at the lateral wall of pen core frame, and the singlechip module and power module set up in the shell, and set button and alarm module set up at the surface of shell, the singlechip module is connected with hall sensor, set button and alarm module electricity respectively, and set button is used for setting voltage threshold value, and the singlechip module is used for converting the voltage signal of hall sensor into voltage value, and when voltage value is greater than setting threshold value, controls alarm module and alarms. The utility model sends the alarm when the insulin residual amount in pen core is insufficient, to remind the user to replace the new pen core.

Description

Technical Field

[0001] This utility model relates to an insulin pen. Background Technology

[0002] As a core treatment tool for diabetic patients, the insulin pen's basic structure mainly includes the pen body, cartridge holder, cartridge, needle, and cap. The rear of the pen body integrates a dose adjustment device, injection button, and dose display window, while the front of the pen body has a screw rod. The rear of the cartridge holder connects to the front of the pen body. The cartridge, filled with insulin, is housed within the cartridge holder. A piston is located at the rear of the cartridge, and the screw rod moves the piston. A rubber membrane is located at the front of the cartridge. The needle is mounted at the front of the cartridge holder, with one end passing through the rubber membrane and communicating with the inside of the cartridge, and the other end used for skin puncture. A needle cap covers the needle. During use, the injection dose is adjusted using the dose adjustment device, and then the injection button is pressed. This causes the screw rod to move the piston forward, injecting the set insulin dose.

[0003] A graduated window is provided on the side wall of the cartridge holder to display the remaining insulin level in the cartridge. When the insulin level is low, a new cartridge needs to be replaced to avoid insufficient insulin for the next use, which would reduce the therapeutic effect. However, the insulin pen mentioned above lacks a level indicator, and users usually need to visually observe the remaining insulin level by observing the position of the piston inside the cartridge. However, visual observation is prone to errors, and the possibility of errors is even greater if the user has poor eyesight or blurred vision. This can easily lead to inaccurate judgment of the remaining insulin level, causing inconvenience to the user. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an insulin pen that issues an alarm when the insulin level in the cartridge is low, so as to remind the user to replace the cartridge.

[0005] To solve the above problems, the present invention adopts the following technical solution:

[0006] An insulin pen includes a pen body, a cartridge holder, a cartridge, a needle, and a cap. The pen body integrates a dose adjustment device, an injection button, and a dose display window at its rear end, and a screw rod at its front end. The rear end of the cartridge holder is connected to the front end of the pen body. The cartridge is filled with insulin and is housed within the cartridge holder. A piston is located at the rear end of the cartridge, and the screw rod moves the piston. A rubber membrane is located at the front end of the cartridge. A scale window is provided on the side wall of the cartridge holder to display the remaining insulin level in the cartridge. The needle is mounted at the front end of the cartridge holder, with one end passing through the rubber membrane and communicating with the inside of the cartridge, and the other end used for piercing the skin. A needle cap is fitted over the needle. The cap covers the needle cap. A distinguishing feature of this insulin pen is that it also... The device includes a magnetic block, a Hall sensor, a housing, a microcontroller module, a setting button, an alarm module, and a power supply module. The magnetic block is disposed inside the piston, and the Hall sensor is disposed at the bottom of the scale window of the pen refill holder to detect changes in magnetic field strength and generate a voltage signal. The housing is disposed on the side wall of the pen refill holder, and the microcontroller module and power supply module are disposed inside the housing. The setting button and alarm module are disposed on the surface of the housing. The microcontroller module is electrically connected to the Hall sensor, the setting button, and the alarm module respectively. The setting button is used to set the voltage threshold, and the microcontroller module is used to convert the voltage signal generated by the Hall sensor into a voltage value and control the alarm module to sound an alarm when the voltage value is greater than the set threshold. The power supply module is used to provide the operating voltage.

[0007] Furthermore, the alarm module includes a flashing light and a voice module disposed on the surface of the housing.

[0008] Furthermore, the insulin pen also includes a communication module electrically connected to the microcontroller module, which is housed within the casing.

[0009] The beneficial effects of this utility model are:

[0010] The insulin pen provided by this invention allows the user or their family to input a voltage threshold into the microcontroller module via a setting button. The Hall sensor determines the remaining insulin level in the cartridge by detecting the strength of the magnetic field. Since the Hall sensor is located at the bottom of the scale window, the closer the piston is to the Hall sensor, the stronger the magnetic field generated by the magnetic block on the Hall sensor, indicating that the remaining insulin level in the cartridge is lower. At this time, the voltage value converted from the voltage signal output by the Hall sensor by the microcontroller module is also higher. When the voltage value exceeds the set threshold, the microcontroller module will control the alarm module to issue an alarm, thereby reminding the user to replace the cartridge in time. This eliminates the need for the user to judge the remaining insulin level by visual inspection and makes the detection more accurate. Attached Figure Description

[0011] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0012] Figure 2 This is an exploded view of an embodiment of this utility model.

[0013] Figure 3 This is a schematic diagram of an embodiment of the present utility model.

[0014] Figure 4 This is a circuit diagram of an embodiment of the present invention.

[0015] The following components are labeled in the diagram: 1. Pen body; 11. Dosage adjustment device; 12. Injection button; 13. Dosage display window; 14. Screw rod; 2. Pen refill holder; 21. Scale window; 3. Pen refill; 31. Piston; 4. Needle; 41. Needle cap; 5. Pen cap; 6. Magnetic block; 7. Hall sensor; 8. Housing; 9. Microcontroller module; 10. Setting button; 20. Alarm module; 30. Power module; 301. Power switch; 302. Power indicator light; 40. Reset switch; 50. Communication module; 60. Display screen. Detailed Implementation

[0016] The present invention will now be described in conjunction with the accompanying drawings. The specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention. Various modifications and improvements to the technical solutions of the present invention made by those skilled in the art without departing from the spirit of the present invention should fall within the protection scope of the present invention.

[0017] like Figures 1 to 4 As shown, the insulin pen of this embodiment includes a pen body 1, a cartridge holder 2, a cartridge 3, a needle 4, and a pen cap 5. The rear end of the pen body 1 integrates a dose adjustment device 11, an injection button 12, and a dose display window 13. A screw rod 14 is located at the front end of the pen body 1. The rear end of the cartridge holder 2 is connected to the front end of the pen body 1. The cartridge 3 is filled with insulin and is installed within the cartridge holder 2. A piston 31 is located at the rear end of the cartridge 3, and the screw rod 14 can move the piston 31. A rubber membrane is located at the front end of the cartridge 3. A scale window 21 is provided on the side wall of the cartridge holder 2 to display the remaining amount of insulin in the cartridge 3. The needle 4 is installed at the front end of the cartridge holder 2. One end of the needle 4 passes through the rubber membrane and communicates with the interior of the cartridge 3, while the other end is used to puncture the skin. A needle cap 41 is provided over the needle 4. The pen cap 5 is used to cover the needle cap 41. When in use, adjust the injection dose using the dose adjustment device 11, insert the needle into the body, and press the injection button 12 to cause the spiral rod 14 to push the piston 31 forward and inject the set insulin dose.

[0018] Based on the above structure, the insulin pen in this embodiment also includes a magnetic block 6, a Hall sensor 7, a housing 8, a microcontroller module 9, a setting button 10, an alarm module 20, and a power module 30. The magnetic block 6 is disposed inside the piston 31, and the Hall sensor 7 is disposed at the bottom of the scale window 21 of the pen cartridge holder 2, used to detect changes in magnetic field strength and generate a detection signal. The detection principle of the Hall sensor 7 is as follows: after the Hall sensor 7 conducts electricity, current flows through its internal semiconductor material, and the external magnetic field will generate a potential difference (Hall voltage) on both sides, thereby generating a voltage signal (i.e., the detection signal). The voltage magnitude is proportional to the magnetic field strength, and its calculation formula is: VH=K_H*I*△B*sinθ, where VH is the Hall voltage (unit: mV); K_H is the sensitivity coefficient of the Hall sensor 7 (unit: mV / (mA·T)); I is the control current inside the Hall sensor 7 (unit: mA); △B is the change in magnetic induction intensity (unit: T); and θ is the angle between the magnetic field and the plane of the Hall sensor 7. The output voltage of Hall sensor 7 is: Vout=Vo+VH, where Vo is the initial voltage.

[0019] Therefore, the closer the piston 31 is to the Hall sensor 7, the closer the corresponding magnetic block 6 is to the Hall sensor 7, the greater the magnetic field strength detected by the Hall sensor 7, and the greater the voltage value generated (or output).

[0020] The outer casing 8 is located on the side wall of the pen refill holder 2. The microcontroller module 9 and power supply module 30 are housed inside the outer casing 8. The setting button 10 and alarm module 20 are located on the surface of the outer casing 8. The microcontroller module 9 is electrically connected to the Hall sensor 7, the setting button 10, and the alarm module 20. The voltage signal generated by the Hall sensor 7 is sent to the microcontroller module 9, which converts the voltage signal into a voltage value. A voltage threshold is input to the microcontroller module 9 via the setting button 10. When the voltage value output by the Hall sensor 7 exceeds the set threshold, the microcontroller module 9 controls the alarm module 20 to sound an alarm. The power supply module 30 provides the operating voltage.

[0021] In this embodiment, the microcontroller module 9 uses an STM32F103C8T6 microcontroller as its core. A signal amplification circuit, including an INA128 chip, is provided between the microcontroller module 9 and the Hall sensor 7 to amplify the detection signal. The setting buttons 10 in this embodiment are represented by K3, K4, K5, etc., in the circuit. The alarm module 20 in this embodiment includes a flashing light and a voice module mounted on the surface of the housing 8. The flashing light is represented by D1 in the circuit. The voice module includes an ISD2560 voice chip and a speaker. The voice chip stores a voice message similar to "insufficient insulin levels." When the voltage detected by the Hall sensor 7 exceeds a set threshold, the microcontroller module 9 controls the flashing light to flash and simultaneously controls the voice chip to emit a voice message, which is then emitted by the speaker. A reset switch 40 is provided on the surface of the housing 8. The reset switch 40 is electrically connected to the microcontroller module 9 and is used to control the flashing light to stop flashing and the voice module to stop playing the voice message; it is represented by button K2 in the circuit.

[0022] The power module 30 uses a rechargeable battery. The surface of the housing 8 is provided with a charging port for charging the battery. The surface of the housing 8 is provided with a power switch 301 and a power indicator light 302. The power switch 301 is represented by button K1 in the circuit; the power indicator light 302 is represented by D2 in the circuit.

[0023] Therefore, with the insulin pen provided by this utility model, the user or their family member inputs a voltage threshold to the microcontroller module 9 via the setting button 10. The Hall sensor 7 determines the remaining amount of insulin in the pen cartridge 3 by detecting the magnitude of the magnetic field strength. Since the Hall sensor 7 is located at the bottom of the scale window 21, the closer the piston 31 is to the Hall sensor 7, the stronger the magnetic field strength generated by the magnetic block 6 on the Hall sensor 7, indicating that the remaining amount of insulin in the pen cartridge 3 is less. At the same time, the voltage value converted by the microcontroller module 9 from the voltage signal output by the Hall sensor 7 is also greater. When the voltage value is greater than the set threshold, the microcontroller module 9 will control the alarm module 20 to issue an alarm (the flashing light flashes and the voice module issues a voice), thereby reminding the user to replace the pen cartridge 3 in time. This eliminates the need for the user to judge the remaining amount of insulin by visual inspection and makes the detection more accurate.

[0024] For example, in this embodiment, KH = 120mV / (mA·T), I = 0.2mA, ΔB = 0.5T / unit (the change in magnetic induction intensity is 0.5T for each unit of insulin used), and θ is close to 90°, then sinθ≈1. A new pen cartridge 3 contains 100 units of insulin. The initial voltage Vo of the Hall sensor 7 is 0.25V. Therefore, for each unit of insulin used, the change in Hall voltage VH is: 120 * 0.2 * 0.5 = 12mV. The output voltage of the Hall sensor 7 increases by 12mV, becoming Vout = 0.25V + 12mV. So, after using 90 units of insulin, the output voltage of the Hall sensor 7 is Vout = 0.25V + 12mV * 90. At this time, there are 10 units of insulin remaining. Therefore, if we need to set the remaining insulin amount to 10 units, we can input the voltage threshold as 0.25V + 12mV * 90 through the setting button 10. In actual use, the input voltage threshold still needs to be calculated by the user, which is very troublesome. Therefore, the setting button 10 of this utility model can directly set the remaining amount of insulin. The microcontroller module 9 is equipped with a computer program that directly converts the input remaining amount into the corresponding voltage value to improve the convenience of the user.

[0025] Furthermore, the insulin pen in this embodiment also includes a communication module 50 electrically connected to the microcontroller module 9. The communication module 50 is located inside the casing 8. When the remaining insulin level is low, the microcontroller module 9 sends a low-level information message to the caregiver's mobile phone via the communication module 50. The caregiver can then remind the user to replace the pen cartridge 3, providing dual protection. The communication module 50 in this embodiment is a GSM module, specifically a GSM_SIM800A module. It integrates a GSM RF chip, baseband processing chip, memory, power amplifier, etc., onto a single circuit board. It has an independent operating system, GSM RF processing, baseband processing, and provides standard interfaces. The GSM module has all the basic functions for communication based on the GSM network, such as sending SMS messages, making voice calls, and transmitting GPRS data. The RXD and TXD pins of the GSM module are electrically connected to the PA2 and PA3 pins of the microcontroller module 9, respectively, to transmit information about insufficient insulin levels. A GSM network is established between the communication module 50 and the guardian's mobile terminal. A SIM card slot is provided on the surface of the housing 8. After inserting a SIM card with GSM network enabled, the communication module 50 can communicate with the GSM network. The information about insufficient insulin levels is sent from the output of the microcontroller module 9 to the GSM module, and then sent to the guardian's mobile terminal by the radio frequency chip of the GSM module and the GSM network.

[0026] A display screen 60 is also provided on the surface of the outer casing 8. The display screen 60 is electrically connected to the microcontroller module 9 and is used to display the insulin balance input by the setting button 10. In this embodiment, the display screen 60 is an LED liquid crystal display screen.

Claims

1. An insulin pen, comprising a pen body, a cartridge holder, a cartridge, a needle, and a cap, wherein, The pen body integrates a dose adjustment device, injection button, and dose display window at its rear end, and a screw rod at its front end. The rear end of the pen cartridge holder is connected to the front end of the pen body. The cartridge is filled with insulin and is installed in the cartridge holder. A piston is located at the rear end of the cartridge, and the screw rod can push the piston to move. A rubber membrane is located at the front end of the cartridge. A scale window is provided on the side wall of the cartridge holder to display the remaining amount of insulin in the cartridge. A needle is installed at the front end of the cartridge holder, with one end of the needle passing through the rubber membrane and communicating with the inside of the cartridge, and the other end used to puncture the skin. A needle cap is provided over the needle. The pen cap is used to cover the needle cap. The device is characterized by further including a magnetic block, a Hall sensor, a housing, and a microcontroller. The system comprises a module, a setting button, an alarm module, and a power module. The magnetic block is housed within the piston, and the Hall sensor is located at the bottom of the scale window on the pen refill holder to detect changes in magnetic field strength and generate a voltage signal. A housing is located on the side wall of the pen refill holder, with the microcontroller module and power module housed within it. The setting button and alarm module are located on the surface of the housing. The microcontroller module is electrically connected to the Hall sensor, setting button, and alarm module, respectively. The setting button is used to set a voltage threshold, and the microcontroller module converts the voltage signal generated by the Hall sensor into a voltage value, controlling the alarm module to sound an alarm when the voltage value exceeds the set threshold. The power module provides the operating voltage.

2. The insulin pen according to claim 1, characterized in that: The alarm module includes a flashing light and a voice module mounted on the surface of the housing.

3. The insulin pen according to claim 1, characterized in that: It also includes a communication module that is electrically connected to the microcontroller module, and the communication module is located inside the housing.

4. The insulin pen according to claim 1, characterized in that: It also includes a display screen mounted on the surface of the housing, which is electrically connected to the microcontroller module.

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