Pre-charging type electronic injection device

Abstract

The utility model provides a pre-charging type electronic injection device which comprises an outer sleeve and a pen cap which are detachably connected, and further comprises an electronic injection module which is arranged in the outer sleeve and used for achieving the injection process. The grating feedback module is arranged in the outer sleeve, and the grating feedback module is fixedly connected with the electron injection module; according to the utility model, the motor is used as a power unit, the accuracy and stability of infusion are improved, user input is identified by adopting intelligent control, the misoperation rate of a user is reduced, and the accuracy and stability of infusion are improved. The real-time rotating speed and position are obtained through grating feedback, infusion precision is improved, a mechanical structure is replaced by electronic control, the problem of errors generated after repeated use is solved, infusion requirements of drugs with different viscosities can be met, and the intelligent degree and reliability of the intelligent infusion device are improved to a great extent.

Description

Technical Field

[0001] This utility model relates to the technical field of medical injection drug delivery, specifically to a pre-filled electronic injection device. Background Technology

[0002] In the field of modern medical injection drug delivery, mechanical pre-filled injection pens are widely used due to their portability and ease of operation. These devices typically consist of a medical-grade plastic pen body, a pre-filled cartridge, mechanical transmission components (such as a lead screw, gear set, or spring push rod), and a needle assembly. The pen body is ergonomically designed with a textured surface to enhance grip stability. The pre-filled cartridge, made of glass or polymer material, is pre-filled with a fixed dose of medication, and its two ends connect to the needle assembly and the mechanical transmission mechanism. The user triggers the mechanical transmission by rotating a knob or pressing a push rod, driving the cartridge piston to inject the medication. The needle assembly is usually equipped with a protective sleeve to ensure safe use.

[0003] However, existing mechanical pre-filled injection devices have significant drawbacks: mechanical transmission components are prone to idle strokes or transmission lag due to machining tolerances, assembly gaps, and long-term wear, leading to accumulated deviations between the injection stroke and the theoretical value. Especially after repeated use, the wear of mechanical components intensifies, further amplifying the injection error and making it difficult to meet the requirements of high-precision drug delivery; the injection process lacks real-time monitoring and feedback, and when the needle becomes blocked, the drug viscosity is abnormal, or there is a sudden change in resistance at the patient's injection site, the operator cannot detect the abnormal state, which can easily lead to insufficient injection dosage or tissue damage risk; the mechanical transmission mechanism uses a fixed injection force output mode and cannot dynamically adjust the injection pressure and speed according to the drug viscosity; mechanical components are prone to fatigue deformation or wear after frequent use, resulting in decreased transmission efficiency and uneven injection resistance, which seriously affects the service life of the device and the consistency of drug delivery.

[0004] Therefore, the existing technology still needs further development. Utility Model Content

[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and provide a pre-filled electronic injection device to solve the problems existing in the prior art.

[0006] To achieve the above-mentioned technical objectives, according to a first aspect of this utility model, a pre-filled electronic injection device is provided, comprising an outer casing and a pen cap, wherein the outer casing and the pen cap are detachably connected, and the device further comprises:

[0007] An electronic injection module, located inside the outer casing, is used to perform the injection of a drug solution.

[0008] A grating feedback module is disposed inside the outer casing, and the grating feedback module is fixedly connected to the electron injection module;

[0009] The control module is communicatively connected to both the electronic injection module and the grating feedback module, and is used to receive information from the grating feedback module.

[0010] Specifically, the electronic injection module includes a motor, a lead screw, and a push rod. The output shaft of the motor is connected to one end of the lead screw. When the motor rotates, the output shaft of the motor drives the lead screw to rotate.

[0011] The other end of the lead screw and one end of the push rod are connected by a thread. When the lead screw rotates, it drives the push rod to move in a straight line.

[0012] Specifically, the electronic injection module also includes a motor mounting bracket and a motor mounting bracket, both of which are located outside the motor. The motor mounting bracket is located at the end of the motor away from the lead screw, and the motor mounting bracket is located at the end of the motor closer to the lead screw.

[0013] Specifically, the grating feedback module includes a grating sensor and grating gears. The grating gears are located at the end of the motor away from the lead screw. When the motor rotates, it drives the grating gears to rotate.

[0014] The grating sensor is located at one end of the motor and is connected to the grating gear via infrared signal communication.

[0015] Specifically, the device also includes a power supply module, which is located at the end of the motor away from the lead screw. The power supply module includes a battery and a battery holder, with the battery located inside the battery holder.

[0016] The power supply module also includes a flexible plate, which has a positive electrode and a negative electrode, and the positive electrode and the negative electrode of the flexible plate are respectively connected to the positive electrode and the negative electrode of the battery.

[0017] Specifically, the device also includes a dose input module, which is disposed at one end of the power supply module. The dose input module is fixedly connected to the power supply module and is used to set the dose of the drug solution to be injected.

[0018] Specifically, the dose input module includes a dose setting knob and a potentiometer, with the dose setting knob and the potentiometer fixedly connected.

[0019] Specifically, the device also includes an injection button disposed on the surface of the outer casing for receiving button operations from the user;

[0020] The injection button is communicatively connected to the control module.

[0021] Specifically, the device also includes a medicine bottle and a pen refill holder, both of which are disposed inside the pen cap. One end of the medicine bottle is connected to the other end of the push rod, and the other end of the medicine bottle is connected to the pen refill holder. The medicine bottle is used to hold injectable medication, and the pen refill holder is used to fix and support the medicine bottle.

[0022] Specifically, the medicine bottle is equipped with a piston, which is fixedly connected to the push rod. When the push rod moves in a straight line, it pushes the piston forward to infuse the medicine.

[0023] Beneficial effects:

[0024] This invention provides a pre-filled electronic injection device, including an electronic injection module. A lead screw converts the rotational motion of a geared motor into the linear motion of a push rod, driving a piston to deliver the medication, ensuring the smoothness of the injection process. A grating feedback module is also included, equipped with a grating sensor and a grating gear. The motor rotation drives the grating gear rotation, and the control module obtains the real-time speed and rotational position of the motor by collecting changes in the grating's voltage level, significantly improving injection accuracy. Compared with existing technologies, this invention uses a motor as the power unit, improving the accuracy and stability of infusion. Intelligent control identifies user input, reducing the user's error rate. Grating feedback obtains real-time speed and position, further improving infusion accuracy. Electronic control replaces mechanical structures, solving the error problem that arises after repeated use. Furthermore, the intelligent control system can adapt to the infusion needs of drugs with different viscosities, greatly improving the intelligence, usability, and reliability of this invention. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the internal structure of the pre-charged electronic injection device provided in a specific embodiment of this utility model;

[0026] Figure 2 This is a schematic diagram of the pre-charged electronic injection device provided in a specific embodiment of this utility model.

[0027] Figure 3 This is a schematic diagram of the battery installation position provided in a specific embodiment of this utility model;

[0028] Figure 4 This is a schematic diagram of the battery power supply circuit provided in a specific embodiment of this utility model;

[0029] Figure 5 This is a schematic diagram of the internal components of the pre-charged electronic injection device provided in a specific embodiment of this utility model.

[0030] Figure 6 This is a schematic diagram of the dosage setting knob structure provided in a specific embodiment of this utility model;

[0031] Figure 7 This is a schematic diagram of the dosage setting knob circuit structure provided in a specific embodiment of this utility model.

[0032] Figure 8 This is a schematic diagram of the components of the electronic injection module provided in a specific embodiment of this utility model;

[0033] Figure 9 This is a schematic diagram of the components of the grating feedback module provided in a specific embodiment of this utility model;

[0034] Figure 10 This is a schematic diagram of the grating feedback principle provided in a specific embodiment of this utility model;

[0035] Figure 11 This is a schematic diagram showing the position of the injection button provided in a specific embodiment of this utility model;

[0036] Figure 12 This is a schematic diagram of the injection button circuit provided in a specific embodiment of this utility model;

[0037] The reference numerals in the above figures are as follows:

[0038] 1. Outer casing; 2. Pen cap; 3. Motor; 4. Lead screw; 5. Push rod; 6. Upper motor mounting bracket; 7. Lower motor mounting bracket; 8. Grating sensor; 9. Grating gear; 10. Battery; 11. Battery holder; 12. Flexible board; 13. Dosage setting knob; 14. Potentiometer; 15. Injection button; 16. Medicine bottle; 17. Pen refill holder. Detailed Implementation

[0039] To enable those skilled in the art to better understand the technical solution of this utility model, the technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Based on the embodiments in this application, other similar embodiments obtained by those skilled in the art without creative effort should all fall within the scope of protection of this application. Furthermore, the directional terms mentioned in the following embodiments, such as "up," "down," "left," and "right," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for illustrative purposes and not for limiting the creation of this utility model.

[0040] The present invention will be further described below with reference to the accompanying drawings and preferred embodiments.

[0041] Please see Figure 1 This embodiment provides a pre-filled electronic injection device, including an outer casing 1 and a pen cap 2, which are detachably connected. The device also includes an electronic injection module, a grating feedback module, and a control module.

[0042] See Figure 1 In the pre-filled electronic injection device of this embodiment, the electronic injection module is disposed inside the outer casing 1 to realize the injection process of the drug solution; the electronic injection module includes a motor 3, a lead screw 4 and a push rod 5. The output shaft of the motor 3 is connected to one end of the lead screw 4. When the motor 3 rotates, the output shaft of the motor 3 drives the lead screw 4 to rotate. The other end of the lead screw 4 and one end of the push rod 5 are connected by a thread. When the lead screw 4 rotates, it drives the push rod 5 to move linearly.

[0043] Further, see Figure 5 , Figure 5 This is a schematic diagram showing all internal components assembled. Figure 5 The direction of movement of push rod 5 and the internal structure of other working modules can be seen. In this embodiment, the infusion function of the pre-filled electronic injection device is realized through the electronic injection module. The working process includes: converting the rotational motion of the reduction motor 3 into the linear motion of push rod 5 through lead screw 4, thereby pushing the piston forward to push the liquid medicine, such as... Figure 8 As shown, when the geared motor 3 rotates, since the motor 3 is fixed in the injection pen, the rotation of the gear of the motor 3 will drive the lead screw 4 to rotate. During the rotation of the lead screw 4, since the lead screw 4 and the push rod 5 are connected by threads, the rotation is converted into linear motion through the thread structure.

[0044] See Figure 1 The electronic injection module also includes a motor mounting bracket 6 and a motor mounting bracket 7. Both the upper and lower brackets are located outside the motor 3. The upper bracket 6 is located at the end of the motor 3 furthest from the lead screw 4, and the lower bracket 7 is located at the end of the motor 3 closest to the lead screw 4. The design of the upper and lower brackets effectively secures the motor 3, preventing displacement during operation and ensuring stable operation.

[0045] Preferably, the upper motor mounting bracket 6 and the lower motor mounting bracket 7 can be made of high-strength engineering plastic, which has good wear resistance and stability, and can effectively fix the motor 3 and prevent the motor 3 from shifting during operation.

[0046] See Figure 1 and Figure 9In the pre-charged electronic injection device of this embodiment, the grating feedback module is disposed inside the outer casing 1, and the grating feedback module is fixedly connected to the electronic injection module. The grating feedback module includes a grating sensor 8 and a grating gear 9. The grating gear 9 is disposed at the end of the motor 3 away from the lead screw 4. When the motor 3 rotates, it drives the grating gear 9 to rotate. The grating sensor 8 is disposed at the end of the motor 3 away from the lead screw 4 and is connected to the grating gear 9 through infrared signal communication. The grating sensor 8 can detect the rotation of the grating gear 9, thereby obtaining the rotation information of the motor 3 and providing feedback data to the control module.

[0047] Further, see Figure 9 Because a grating gear 9 is installed at the tail end of motor 3, motor 3 will drive the gear to rotate during rotation. The grating sensor 8 is equipped with an infrared transmitter and an infrared receiver. Its specific working process includes: the infrared transmitter emits an infrared signal; when the infrared receiver receives the infrared signal, the voltage level at both ends of the infrared receiver is pulled low; when the infrared receiver does not receive an infrared signal, the voltage level at both ends of the infrared receiver is pulled high. During the rotation of motor 3, the grating gear 9 at the tail end is shaped as follows... Figure 10 As shown on the left, the grating is intermittently switched between on and off states. The control system collects the changes in the grating's voltage level to obtain the real-time speed and rotational position of motor 3. Figure 10 The working principle of the grating sensor 8 is shown on the right, as follows:

[0048] Infrared transmitter ① is used to emit infrared signals, and infrared receiver ② is used to receive infrared signals. When an infrared signal is received, the voltage level at both ends of the infrared receiver is pulled low; when no infrared signal is received, the voltage level at both ends of the infrared receiver is pulled high. Due to the intermittent blocking by the grating gear 9, the infrared receiver will continuously be in a conducting and turning-off state. The control system obtains the real-time speed and rotational position of motor 3 by collecting the voltage level changes at both ends of the infrared receiver. The diode end represents the infrared transmitter, used to emit infrared signals, and the transistor end represents the infrared receiver, with its base connected to the transmitter and its collector and emitter connected to the power supply and ground, respectively. Resistors ③ and ④ are used for current limiting and voltage division to ensure normal circuit operation. Therefore, when motor 3 rotates, the grating gear 9 will intermittently block the infrared signal, causing the voltage level at both ends of the infrared receiver to change periodically. By collecting these voltage level changes, the control system can accurately determine the real-time speed and rotational position of motor 3, thereby achieving precise control of the dose input.

[0049] Preferably, the grating sensor 8 can be a high-precision infrared sensor, which can accurately detect the rotation of the grating gear 9 and provide accurate feedback data to the control module.

[0050] Furthermore, in the pre-filled electronic injection device of this embodiment, a control module is also included. The control module is communicatively connected to both the electronic injection module and the grating feedback module. It is used to receive information from the grating feedback module and control the electronic injection module. The control module adopts a microprocessor design and has high-speed processing capabilities. It can process the data provided by the grating feedback module in real time and accurately control the operation of the motor 3. The control module can calculate the displacement of the push rod 5 based on the rotation information of the motor 3 provided by the grating feedback module, thereby accurately controlling the injection dose.

[0051] See Figure 1 and Figure 3 In this embodiment of the pre-charged electronic injection device, the device also includes a power supply module. The power supply module is located at the end of the motor 3 away from the lead screw 4. The power supply module includes a battery 10 and a battery holder 11. The battery 10 is located inside the battery holder 11. The power supply module also includes a flexible plate 12. The flexible plate 12 includes a positive electrode and a negative electrode. The positive electrode and the negative electrode of the flexible plate 12 are respectively connected to the positive electrode and the negative electrode of the battery 10. The design of the flexible plate 12 makes the circuit connection more flexible and adapts to the limitations of the internal space of the device. The battery 10 is a rechargeable lithium battery 10, which has a long service life and a stable output voltage, and can provide a stable power supply for the device.

[0052] Further, see Figure 3 and Figure 4 The power supply module includes two batteries 10 connected in series. These batteries 10 are mechanically fixed in a battery holder 11, providing power to the motor 3. The batteries are directly connected to the motor 3 via wires to drive its operation. The flexible board 12 has two electrodes, positive and negative, which conduct voltage to the circuit board. The voltage is then transmitted to the motor 3 and the internal control circuit through the circuit board's internal voltage regulator and divider circuits. The specific working process is as follows:

[0053] The voltage from the series-connected battery 10 is input to the IC chip through the DC_IN interface. The IC chip (integrated chip) has multiple pins (such as labeled 1, 2, 3, 4) responsible for functions such as voltage regulation, voltage division, or signal processing to ensure the stability and accuracy of the output voltage. The voltage after processing by the IC chip is output through the DC_OUT interface. This power supply module provides power support to the entire system through two series-connected batteries 10. The voltage generated by the battery 10 is conducted to the circuit board through the electrode plates on the flexible board 12, and after voltage regulation and division on the circuit board, it is finally supplied to the motor 3 and the internal control circuit respectively.

[0054] See Figure 1 and Figure 2In this embodiment of the pre-charged electronic injection device, the device further includes a dose input module, which is disposed at one end of the power supply module and is fixedly connected to the power supply module. The dose input module is used to set the dose of the drug solution to be injected. The dose input module includes a dose setting knob 13 and a potentiometer 14. The dose setting knob 13 and the potentiometer 14 are fixedly connected. Its working process includes: when the dose setting knob 13 is rotated, it will drive the potentiometer 14 to rotate synchronously. By rotating the dose setting knob 13, the user can easily adjust the injection dose. The potentiometer 14 converts the rotation angle into an electrical signal and transmits it to the control module. The dose setting knob 13 adopts an ergonomic design, is comfortable to hold, and has moderate rotation damping, enabling the user to accurately set the dose.

[0055] See Figure 6 and Figure 7 The dosage input process of a pre-filled electronic injection pen includes: the user rotates the dosage setting knob 13, which moves the potentiometer 14 below the dosage setting knob 13, such as... Figure 7 As shown, the circuit works by rotating potentiometer AD, which changes the resistance corresponding to potentiometer AD. R1 represents a fixed resistor, used as part of the voltage divider circuit. RS is the sliding terminal on potentiometer 14. As potentiometer 14 rotates, this terminal moves across the resistor, thereby changing the output voltage. DC is the DC power supply, providing a stable DC voltage for the entire circuit. Due to the voltage division by the resistor, different voltages are input to the control module. That is, potentiometer 14 changes its effective resistance value as the dose setting knob 13 rotates, thereby changing the voltage at the sliding terminal through the principle of voltage division by the resistor. The control module detects this voltage change and ultimately determines the dose input by the user. This makes dose adjustment more intuitive and accurate, improving the convenience and accuracy of the electronic injection device of this invention.

[0056] See Figure 11 In this embodiment of the pre-filled electronic injection device, the device also includes an injection button 15, which is disposed on the surface of the outer casing 1 and is used to receive user button operations. The injection button 15 is communicatively connected to the control module, and its specific working process is as follows: when the control module receives the user's button operation, it converts the button operation into a change in level signal. After the user presses the injection button 15, the control module receives the signal, starts the motor 3, and begins the injection process. An indicator light is provided above the injection button 15, and the dosage setting knob 13 is provided with four positions. During the rotation process, if a position change occurs, the indicator light will flash once. After adjusting the position, the user presses the injection button 15 to perform the infusion operation. At this time, the indicator light will flash frequently, thereby indicating that it is in the infusion state.

[0057] Further, see Figure 11 and Figure 12In the pre-filled electronic injection device of this embodiment, the specific working process of the injection button, i.e., the input button, is as follows:

[0058] like Figure 12 As shown, when the user presses motor 3 for the first time, the EN port will be at a high level, and the KEY port will be at a low level due to the conduction of the MOSFET. At this time, the control module will continuously output a high level to the PWR port, so that the EN port will remain at a high level even after the user releases the button. After that, when the user presses the button again, the control system detects whether the user has pressed the button by detecting the level change of the KEY port. If the KEY port is at a low level, it means that the button has been pressed; if the KEY port is at a high level, it means that the button has not been pressed.

[0059] See Figure 1 and Figure 2 In this embodiment of the pre-filled electronic injection device, the device also includes a medicine bottle 16 and a pen holder 17. Both the medicine bottle 16 and the pen holder 17 are disposed inside the pen cap 2. One end of the medicine bottle 16 is connected to the other end of the push rod 5, and the other end of the medicine bottle 16 is connected to the pen holder 17. The medicine bottle 16 is used to load the injection liquid, and the pen holder 17 is used to fix and support the medicine bottle 16. A piston is provided in the medicine bottle 16, and the piston is fixedly connected to the push rod 5. When the push rod 5 moves linearly, it pushes the piston forward to infuse the liquid.

[0060] Preferably, the medicine bottle 16 is made of a transparent material, making it easy for the user to observe the remaining amount and state of the medicine. The pen refill holder 17 is made of a high-strength material, which can stably support the medicine bottle 16 and prevent the medicine bottle 16 from shifting during use. The piston is made of medical-grade silicone material, which has good sealing and biocompatibility, and can ensure the sterility of the medicine and the safety of injection.

[0061] During use, the user first sets the desired dosage of the injected medication using the dosage setting knob 13, then presses the injection button 15. Upon receiving the signal, the control module starts the motor 3, which drives the lead screw 4 to rotate. The lead screw 4, through a threaded connection, drives the push rod 5 in a linear motion. The push rod 5 pushes the piston forward in the vial 16, ejecting the medication and completing the injection process. During injection, the grating feedback module monitors the rotation of the motor 3 in real time and feeds the information back to the control module. The control module adjusts the operation of the motor 3 based on the feedback information to ensure the accuracy of the injection dosage.

[0062] It is understood that the pre-filled electronic injection device in this embodiment has a compact structure and is easy to operate. Precise injection is achieved through electronic control, improving injection accuracy and safety. The design of the grating feedback module allows the device to monitor the injection process in real time, ensuring the accuracy of the injection dosage. The design of the dosage input module and injection button allows users to easily set the dosage and perform the injection operation. The design of the medicine bottle and refill holder makes it easier to replace the medication, improving the efficiency of the device.

[0063] It should be noted that the pre-filled electronic injection device in this embodiment adopts a modular design, with each module closely connected and working collaboratively to achieve automation and precision in drug injection. The application of the electronic control system makes the injection process safer and more reliable, the design of the grating feedback module improves the accuracy of the injection dosage, and the design of the dosage input module and injection button makes operation simpler and more intuitive. It is suitable for patients who need long-term, regular drug injections, and can effectively improve the convenience and safety of injection.

[0064] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0065] The technical features described above can be combined arbitrarily. Although not all possible combinations of these technical features are described, any combination of these technical features should be considered to be covered by this specification, provided that such combination does not contain contradictions.

[0066] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A pre-filled electronic injection device, comprising an outer casing (1) and a pen cap (2), wherein the outer casing (1) and the pen cap (2) are detachably connected, characterized in that, The device further includes: An electronic injection module is located inside the outer casing (1) and is used to realize the injection process of the drug solution; A grating feedback module is disposed inside the outer casing (1), and the grating feedback module is fixedly connected to the electron injection module; The control module is communicatively connected to both the electronic injection module and the grating feedback module, and is used to receive information from the grating feedback module.

2. The pre-charged electro-injection device according to claim 1, characterized in that, The electronic injection module includes a motor (3), a lead screw (4) and a push rod (5). The output shaft of the motor (3) is connected to one end of the lead screw (4). When the motor (3) rotates, the output shaft of the motor (3) drives the lead screw (4) to rotate. The other end of the lead screw (4) and one end of the push rod (5) are connected by a thread. When the lead screw (4) rotates, it drives the push rod (5) to move in a straight line.

3. The pre-charged electronic injection device according to claim 2, characterized in that, The electronic injection module also includes a motor mounting bracket (6) and a motor mounting bracket (7). Both the motor mounting bracket (6) and the motor mounting bracket (7) are located outside the motor (3). The motor mounting bracket (6) is located at the end of the motor (3) away from the lead screw (4), and the motor mounting bracket (7) is located at the end of the motor (3) close to the lead screw (4).

4. The pre-charged electronic injection device according to claim 3, characterized in that, The grating feedback module includes a grating sensor (8) and a grating gear (9). The grating gear (9) is located at the end of the motor (3) away from the lead screw (4). When the motor (3) rotates, it drives the grating gear (9) to rotate. The grating sensor (8) is located at one end of the motor (3) and is connected to the grating gear (9) via infrared signal communication.

5. The pre-charged electro-injection device according to claim 2, characterized in that, The device also includes a power supply module, which is located at the end of the motor (3) away from the lead screw (4). The power supply module includes a battery (10) and a battery holder (11), with the battery (10) located inside the battery holder (11). The power supply module also includes a flexible plate (12), which includes a positive electrode and a negative electrode. The positive electrode and the negative electrode of the flexible plate (12) are respectively connected to the positive electrode and the negative electrode of the battery (10).

6. The pre-charged electro-injection device according to claim 5, characterized in that, The device also includes a dosage input module, which is disposed at one end of the power supply module. The dosage input module is fixedly connected to the power supply module and is used to set the dosage of the drug solution to be injected.

7. The pre-charged electronic injection device according to claim 6, characterized in that, The dose input module includes a dose setting knob (13) and a potentiometer (14), with the dose setting knob (13) and the potentiometer (14) fixedly connected.

8. The pre-charged electronic injection device according to claim 1, characterized in that, The device also includes an injection button (15) disposed on the surface of the outer casing (1) for receiving button operations from the user; The injection button (15) is communicatively connected to the control module.

9. The pre-charged electronic injection device according to claim 2, characterized in that, The device also includes a medicine bottle (16) and a pen holder (17), both of which are located inside the pen cap (2). One end of the medicine bottle (16) is connected to the other end of the push rod (5), and the other end of the medicine bottle (16) is connected to the pen holder (17). The medicine bottle (16) is used to hold the injection liquid, and the pen holder (17) is used to fix and support the medicine bottle (16).

10. The pre-charged electronic injection device according to claim 9, characterized in that, The medicine bottle (16) is equipped with a piston, which is fixedly connected to the push rod (5). When the push rod (5) moves in a straight line, it pushes the piston forward to infuse the medicine.

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