Injection pen with disinfection function

Abstract

The utility model provides an injection pen with a disinfection function, which comprises a shell, an injector is inserted in the shell, the bottom of the injector is fixedly connected with an injection needle, and the lower end of the shell is fixedly connected with a disinfection mechanism. During use, the limiting plate can be controlled to move by rotating the adjusting plate, the syringe can be quickly released or fixed, the syringe can only be inserted and pulled out from the top and can be stably clamped and fixed by being matched with the limiting mechanism, meanwhile, electronic components are integrated on the shell, the disposable syringe does not need to be integrated with an electronic structure, and the cost is reduced. The disposable syringe can be quickly replaced and mounted, so that the effects of simplifying the disassembly and assembly process of the syringe, ensuring the stability of the syringe in the injection process and reducing the use cost are achieved, and the problems of difficulty in combination with the disposable syringe and high use cost in the prior art are solved.

Description

Technical Field

[0001] This utility model relates to the field of injection pen technology, and in particular to an injection pen with disinfection function. Background Technology

[0002] Diabetes, a prevalent chronic metabolic disease, is widespread across all age groups. The persistent hyperglycemia and long-term metabolic disorders caused by this disease can have a progressive impact on all tissues and organs of the body. In severe cases, it can lead to functional damage in key areas such as the eyes, kidneys, nerves, heart, and blood vessels, not only reducing the patient's quality of life but also threatening their life and health. In the clinical treatment system for diabetes, GLP-1 liquid formulation injection is a common and important medical means of controlling blood sugar. It is usually necessary to use a GLP-1 liquid formulation injector to complete the daily administration. Therefore, the practicality, safety, and convenience of the injector are directly related to the patient's treatment effect and user experience.

[0003] Chinese patent CN213724150U discloses a diabetes insulin injection pen. The device includes a pen body, pen cap, electrical box, motor, threaded rod, voice announcer, pressure ring, and ultraviolet lamp. Its design highlights include a voice announcer that announces the injection scale adjustment value, which, combined with the pressure ring, assists blind patients in locating the injection site, solving the problem of inconvenience for blind users. Furthermore, when installing the pen body and cap before and after injection, the needle of a disposable injection needle can be placed in the needle slot of the ultraviolet lamp, which is powered by a button battery to disinfect the needle, thereby improving injection safety and providing a new approach to optimizing insulin injection devices.

[0004] The aforementioned injection device still has certain shortcomings: First, sterilization relies on continuous ultraviolet light irradiation, which users may forget to turn on in advance. Temporary activation requires waiting for the required time to be reached, extending the injection preparation time. Furthermore, it lacks an immediate sterilization structure, making it unable to meet emergency needs and resulting in low efficiency. Second, the drug cartridge is inconvenient to disassemble and assemble, and the integrated motor, electrical box, and other electronic structures lead to higher costs. Due to the large number of electronic components, it is difficult to adopt a disposable design, which cannot fully avoid the risk of cross-infection and is also difficult to adapt to disposable syringes, thus limiting its clinical promotion and daily application. In summary, the device fails to balance convenience, safety, and economy, and cannot meet the diverse needs of patients, thus requiring urgent improvement. Utility Model Content

[0005] To address the aforementioned problems, this invention proposes an injection pen with a disinfection function, which can more accurately solve the problems described above.

[0006] This utility model is achieved through the following technical solution:

[0007] This utility model proposes an injection pen with disinfection function, including a shell, a syringe inserted inside the shell, an injection needle fixedly connected to the bottom of the syringe, a disinfection mechanism fixedly connected to the lower end of the shell, and a limiting mechanism fixedly installed at the upper end of the shell, the limiting mechanism being engaged with the top of the syringe.

[0008] The limiting mechanism includes a side shell, which is fixedly connected to the upper end of one side of the housing. A torsion spring is fixedly connected inside the side shell. A turntable is fixedly installed on the top of the torsion spring. A fixing block is fixedly installed on the top of the turntable. A limiting plate is fixedly installed on the outer side of the fixing block.

[0009] Furthermore, a rotating shaft is fixedly connected to the bottom of the turntable, and an adjustment plate is fixedly installed at the bottom end of the rotating shaft through the side shell.

[0010] Furthermore, the limiting plate is generally arranged in a semi-circular shape, the limiting plate covers the top side of the syringe, and the bottom of the limiting plate is fitted and connected to the top side of the syringe sleeve.

[0011] Furthermore, the disinfection mechanism includes a box body, which is fixedly installed on the lower side of the housing. A storage battery is provided inside the box body, and a control switch is fixedly connected to one side of the box body. A supply component is provided on the outside of the box body, and a disinfection component is installed at the bottom of the supply component. The output end of the supply component is connected to the disinfection component, and the disinfection component covers the outside of the injection needle.

[0012] Furthermore, the supply component includes a tank body, which is fixedly connected to the outside of the box body. A micro pump is fixedly installed at the bottom of the tank body. The input end of the micro pump is connected to the inside of the tank body. A hose is fixedly connected to the output end of the micro pump. The disinfection component is fixedly connected to the outer end of the hose. A disinfectant addition tube is fixedly connected to the top of the tank body. A sealing cap is threadedly connected to the top of the disinfectant addition tube.

[0013] Furthermore, the disinfection assembly includes a disinfection cap and a first magnetic ring. The first magnetic ring is fixedly connected to the bottom of the housing, and the disinfection cap is fixedly connected to the lower end of the hose. A second magnetic ring is fixedly installed on the top of the disinfection cap, and the first magnetic ring is magnetically attracted to the bottom of the second magnetic ring. An annular tube is fixedly installed inside the upper part of the disinfection cap. The input end of the annular tube is connected to the output end of the hose. Disinfection nozzles are fixedly connected to the bottom of the annular tube in a ring at equal intervals. Disinfection nozzles are fixedly connected to the inner side of the disinfection nozzles in a linear arrangement at equal intervals.

[0014] Furthermore, the inner side of the disinfection cover is fixedly equipped with brackets arranged in a ring at equal intervals, and each bracket is fixedly connected to an ultraviolet disinfection lamp. Each bracket is located at the gap between each disinfection tube.

[0015] The beneficial effects of this utility model are:

[0016] 1. During the application of this technical solution, by setting a limiting mechanism and a detachable syringe structure, the movement of the limiting plate can be controlled by rotating the adjustment plate during use, so as to quickly release or fix the syringe. The syringe can only be inserted and removed from the top. With the help of the limiting mechanism, the syringe can be stably locked and fixed. At the same time, the electronic components are integrated on the box body. The disposable syringe does not need to integrate the electronic structure. It is only necessary to quickly replace and install the disposable syringe. Thus, the syringe disassembly and assembly process is simplified, the syringe stability is ensured during injection, and the use cost is reduced. This solves the problems of difficulty in combining with disposable syringes and high use cost in the existing technology.

[0017] 2. During the application of this technical solution, by setting up a disinfection mechanism and control switch, the disinfection method can be flexibly selected according to the needs during use. The ultraviolet disinfection lamp inside the disinfection cover can be turned on in advance to pre-treat and disinfect the injection needle. If it is forgotten to turn it on in advance, the micro pump can be started to spray the disinfectant in the tank through the hose, ring tube, disinfection drain tube and disinfectant nozzle onto the surface of the injection needle to achieve immediate chemical disinfection. The two disinfection methods work together without long waiting time, thereby meeting the needs of emergency injection, improving disinfection efficiency and flexibility, and solving the problem that ultraviolet disinfection in the existing technology requires continuous waiting and lacks a rapid and immediate disinfection method. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the overall disassembled structure of this utility model;

[0020] Figure 3 This is a top-view structural diagram of the disassembled disinfection mechanism of this utility model;

[0021] Figure 4 This is a top view of the disinfection mechanism of this utility model;

[0022] Figure 5 This utility model Figure 2 A magnified structural diagram at point A.

[0023] In the diagram: 1. Shell; 2. Syringe; 3. Injection needle; 4. Sterilization mechanism; 41. Box; 42. Control switch; 43. Supply assembly; 431. Tank; 432. Micro pump; 433. Hoses; 434. Sterilizer addition tube; 435. Sealing cap; 44. Sterilization assembly; 441. Sterilization cap; 442. First magnetic ring; 443. Second magnetic ring; 444. Ring tube; 445. Sterilization manifold; 446. Sterilizer nozzle; 447. Fixing frame; 448. Ultraviolet sterilization lamp; 5. Limiting mechanism; 51. Side shell; 52. Torsion spring; 53. Turntable; 54. Fixing block; 55. Limiting plate; 56. Rotating shaft; 57. Adjusting plate. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1

[0026] An injection pen with disinfection function includes a housing 1, a syringe 2 inserted inside the housing 1, an injection needle 3 fixedly connected to the bottom of the syringe 2, a disinfection mechanism 4 fixedly connected to the lower end of the housing 1, and a limiting mechanism 5 fixedly installed at the upper end of the housing 1, the limiting mechanism 5 being engaged with the top of the syringe 2.

[0027] The limiting mechanism 5 includes a side shell 51, which is fixedly connected to the upper side of the housing 1. A torsion spring 52 is fixedly connected inside the side shell 51. A turntable 53 is fixedly installed on the top of the torsion spring 52. A fixing block 54 is fixedly installed on the top of the turntable 53. A limiting plate 55 is fixedly installed on the outer side of the fixing block 54. During the application of this device, by setting up the housing 1, syringe 2, injection needle 3, sterilization mechanism 4, and limiting mechanism 5, the syringe 2 is first inserted into the housing 1. Then, the limiting mechanism 5 is operated. Utilizing the characteristics of the torsion spring 52 inside the side shell 51, the turntable 53 is driven to rotate. The turntable 53 drives the limiting plate 55 to move through the fixing block 54 until the limiting plate 55 engages with the top of the syringe 2, thereby fixing the syringe 2 and preventing the syringe 2 from being injected during the injection process. After repositioning, GLP-1 liquid formulation can be injected through the injection needle 3 at the bottom of the syringe 2. Before and after injection, the injection needle 3 can be disinfected by the sterilization mechanism 4 at the lower end of the housing 1. This design makes the fixing operation of the syringe 2 simple and convenient. The limiting mechanism 5, through the cooperation of the torsion spring 52, the turntable 53 and the fixing block 54, can stably lock the syringe 2 to ensure the stability during injection and reduce the impact of injection effect due to the loosening of the syringe 2. At the same time, the setting of the sterilization mechanism 4 can sterilize the injection needle 3, reducing the safety hazards caused by the exposure of the injection needle 3. The overall structure is tightly fitted, which not only meets the basic requirements of injection operation, but also improves the safety and reliability of use through the basic functions of limiting and sterilization, making it suitable for daily GLP-1 liquid formulation injection scenarios.

[0028] Combination Figures 1-5 As shown, a rotating shaft 56 is fixedly connected to the bottom of the turntable 53. An adjusting plate 57 is fixedly installed through the side shell 51 at the bottom end of the rotating shaft 56. The limiting plate 55 is set in a semi-arc shape. The limiting plate 55 covers the top side of the syringe 2. The bottom of the limiting plate 55 is attached to the top side of the syringe 2 sleeve.

[0029] The technical solution described in the above-described embodiments of this application, during the application of this device, is achieved by setting up a housing 1, a syringe 2, an injection needle 3, a sterilization mechanism 4, a limiting mechanism 5, a rotating shaft 56, and an adjusting plate 57. In use, the syringe 2 is first inserted into the housing 1, then the adjusting plate 57, which penetrates the side housing 51, is rotated. The adjusting plate 57 drives the rotating shaft 56 at the bottom of the turntable 53 to rotate, and the rotating shaft 56 drives the turntable 53 to rotate synchronously. During the rotation of the turntable 53, the characteristics of the torsion spring 52 inside the side housing 51 are utilized, and simultaneously, the semi-circular limiting plate 55 is moved through the fixing block 54 at the top until the limiting plate 55 covers the top side of the syringe 2 and its bottom is in contact with the top side of the syringe 2 sleeve, thus achieving a snap-fit ​​fixation of the syringe 2 and preventing displacement of the syringe 2 during injection. Then, the syringe can be used... GLP-1 liquid formulation is injected through the injection needle 3 at the bottom of the syringe 2. The injection needle 3 can be disinfected before and after injection using the sterilization mechanism 4 at the lower end of the housing 1. This design makes the fixing operation of the syringe 2 easier to control. The setting of the adjustment plate 57 makes the rotation operation more convenient. The semi-circular limiting plate 55 can better fit the top contour of the syringe 2, improve the locking stability, and reduce the situation where the injection effect is affected by the loosening of the syringe 2. At the same time, the sterilization mechanism 4 can disinfect the injection needle 3, reducing the safety hazards caused by the exposure of the injection needle 3. The overall structure fits tightly, which not only meets the basic requirements of injection operation, but also further improves the stability and convenience of use through a more suitable limiting structure and convenient adjustment method, making it suitable for daily GLP-1 liquid formulation injection scenarios.

[0030] Example 2

[0031] Combination Figures 1-4As shown, the disinfection mechanism 4 includes a housing 41, which is fixedly installed on the lower side of the housing 1. A battery is installed inside the housing 41. A control switch 42 is fixedly connected to one side of the housing 41. A supply component 43 is provided on the outside of the housing 41. A disinfection component 44 is installed at the bottom of the supply component 43. The output end of the supply component 43 is connected to the disinfection component 44. The disinfection component 44 covers the outside of the injection needle 3. The supply component 43 includes a tank 431, which is fixedly connected to the outside of the housing 41. A micro pump 432 is fixedly installed at the bottom of the tank 431. The input end of the micro pump 432 is connected to the inside of the tank 431. A hose 433 is fixedly connected to the output end of the micro pump 432. The disinfection component 44 is fixedly connected to the outer end of the hose 433. A disinfectant addition tube 434 is fixedly connected to the top of the tank 431. A sealing cap 435 is threadedly connected to the top of the disinfectant addition tube 434. The disinfection assembly 44 includes a disinfection cap 441 and a first magnetic ring 442. The first magnetic ring 442 is fixedly connected to the bottom of the housing 1. The disinfection cap 441 is fixedly connected to the lower end of the hose 433. A second magnetic ring 443 is fixedly installed on the top of the disinfection cap 441. The first magnetic ring 442 is magnetically attracted to the bottom of the second magnetic ring 443. An annular tube 444 is fixedly installed inside the upper part of the disinfection cap 441. The input end of the annular tube 444 is connected to the output end of the hose 433. Disinfection pipes 445 are fixedly connected to the bottom of the annular tubes 444 in a ring at equal intervals. Disinfection nozzles 446 are fixedly connected to the inner side of the disinfection pipes 445 in a linear arrangement at equal intervals. Fixing brackets 447 are fixedly installed to the inner side of the disinfection cap 441 in a ring at equal intervals. Ultraviolet disinfection lamps 448 are fixedly connected to the inner side of each fixing bracket 447. Each fixing bracket 447 is located at the gap between each disinfection pipe 445.

[0032] The technical solution described in the above-described embodiments of this application, during the application of this device, is achieved by setting up a housing 1, a syringe 2, an injection needle 3, a limiting mechanism 5, and a disinfection mechanism 4 including a box 41, a storage battery, a control switch 42, a supply component 43, and a disinfection component 44. This allows the syringe 2 to be fixed in place by the limiting mechanism 5 according to the previous operation. Then, if disinfection is required, the storage battery inside the box 41 can power the disinfection-related components. The supply component 43 is activated by the control switch 42, and the supply component 44... The tank 431 of the injection needle 3 stores disinfectant. Opening the sealing cap 435 on the disinfectant addition tube 434 replenishes the disinfectant. Activating the micro pump 432 at the bottom of the tank 431 draws out the disinfectant, which is then transported via a hose 433 to the annular tube 444 of the disinfection assembly 44. The annular tube 444 then distributes the disinfectant to the disinfection drain tube 445, and finally sprays it onto the surface of the injection needle 3 through the disinfectant nozzle 446 inside the disinfection drain tube 445. Simultaneously, the disinfection cap 441 of the disinfection assembly 44 can be accessed through the first... The magnetic ring 442 and the second magnetic ring 443 cooperate to cover the outside of the injection needle 3. The ultraviolet disinfection lamp 448 on the fixing bracket 447 inside the disinfection cap 441 can also be turned on to irradiate and disinfect the injection needle 3. The fixing bracket 447 is located in the gap of the disinfection tube 445 and will not affect the disinfection operation. After the injection, the above steps can be repeated to disinfect the injection needle 3. This design makes the disinfection operation more comprehensive and flexible. The supply component 43 can stably provide disinfectant to achieve chemical disinfection, and the ultraviolet disinfection lamp 448 can assist in physical disinfection. The combination of the two disinfection methods can improve the disinfection effect. The magnetic cooperation makes it easier to install and remove the disinfection cap 441. The sealing cap 435 can prevent disinfectant leakage or contamination. The battery and control switch 42 make the disinfection operation easier to control. The whole system not only meets the disinfection needs of the injection needle 3 before and after injection, but also improves the convenience and reliability of disinfection through the cooperation of multiple components, further reducing the safety hazards caused by the exposure of the injection needle 3. It is suitable for daily GLP-1 liquid preparation injection scenarios.

[0033] The working principle and advantages of this utility model are as follows: Before using this device, first confirm that the battery inside the device housing 41 has sufficient power. The battery provides power support for all electrical components of the device. The operation of the disinfection-related components can be controlled by the control switch 42 on the housing 41, ensuring controllable operation. Then, open the sealing cap 435 on the disinfectant addition tube 434 at the top of the tank 431, inject an appropriate amount of disinfectant into the tank 431, and then tighten the sealing cap 435. The sealing cap 435 can prevent disinfectant leakage or contamination. The tank 431 is used to store the disinfectant for later use. After sterilization, the raw materials are provided, and then the syringe 2 is inserted into the shell 1. The adjusting plate 57 at the bottom of the rotating shaft 56 is rotated. The adjusting plate 57 drives the rotating shaft 56 and the turntable 53 to rotate. The turntable 53 twists the torsion spring 52 inside the side shell 51 and drives the limiting plate 55 to move through the fixing block 54. When the limiting plate 55 covers the top side of the syringe 2 and the bottom is in contact with the sleeve of the syringe 2, the rotation of the adjusting plate 57 is stopped. The elastic potential energy of the torsion spring 52 keeps the limiting plate 55 in a squeezing state to fix the syringe 2 and prevent it from shifting during injection. This process can be completed by manual operation only.

[0034] During pre-injection disinfection, the disinfection cap 441 is moved to the outside of the injection needle 3, so that the second magnetic ring 443 at the top of the disinfection cap 441 and the first magnetic ring 442 at the bottom of the housing 1 are magnetically attracted and fixed. The magnetic attraction facilitates the quick installation and removal of the disinfection cap 441. At the same time, the disinfection cap 441 stably covers the injection needle 3, providing a closed space for disinfection. The micro pump 432 is started by the control switch 42. The micro pump 432 draws out the disinfectant from the tank 431 and delivers it through the hose 433 to the annular tube 444 inside the disinfection cap 441. The annular tube 444 diverts the disinfectant to the disinfection chamber. The disinfection tube 445 is used to spray disinfectant solution evenly onto the surface of the injection needle 3 through the disinfection nozzle 446 inside the disinfection tube 445 to achieve chemical disinfection. During use, the ultraviolet disinfection lamp 448 on the fixing bracket 447 inside the disinfection cover 441 can be opened in advance. The fixing bracket 447 fixes the ultraviolet disinfection lamp 448 and is located in the gap of the disinfection tube 445 to avoid obstructing the disinfection operation. At this time, the ultraviolet disinfection lamp 448 is used for pre-disinfection. If it is forgotten to be turned on in advance, immediate disinfection can be performed. At this time, the micro pump 432 is started for disinfection. During use, the selection can be flexibly selected according to the needs.

[0035] After disinfection, manually separate the first magnetic ring 442 and the second magnetic ring 443, remove the disinfection cap 441 to expose the injection needle 3, and then perform the GLP-1 liquid preparation injection operation. During the injection process, the limiting plate 55 continuously limits the syringe 2 to ensure injection stability and avoid the injection effect being affected by the displacement of the syringe 2. This technical solution ensures a smooth injection process through the stable limiting mechanism 5.

[0036] After injection, syringe 2 can be replaced. By rotating the adjusting plate 57 in the reverse direction, the turntable 53 twists the torsion spring 52, causing the limiting plate 55 to move away from the top of syringe 2. After releasing the limiting plate, the old syringe 2 is pulled out and the new syringe 2 is inserted. During disassembly, the rotating shaft 56 is twisted to rotate the turntable 53, causing the torsion spring 52 to be in a compressed state. After replacing syringe 2, the adjusting plate 57 is released. At this time, the torsion spring 52 returns to its original position, which can then move the limiting plate 55 back to cover the top of syringe 2 and fix it again. During use, the ultraviolet lamp can be turned on in advance for sterilization. If the ultraviolet lamp is forgotten to be turned on, the micro pump 432 can be started to pump disinfectant. The disinfectant is sprayed quickly through the hose 433, the ring tube 444, the disinfection tube 445, and the disinfectant nozzle 446 to disinfect the needle. If skin disinfection is required, the ultraviolet lamp can be turned off, the disinfection cap 441 can be flipped over and placed over the skin area to be injected, and the micro pump 432 can be started to pump disinfectant and spray it onto the skin, which can also achieve good disinfection. The effect is that, by setting up the above-mentioned structures, the device can combine ultraviolet disinfection and chemical disinfection during use, solving the problem of continuous waiting for ultraviolet disinfection in existing devices, meeting the needs of emergency injection, and improving the efficiency of use; the syringe 2 can be quickly disassembled and assembled through the limiting mechanism 5, and can be used with disposable syringe 2. Moreover, the electronic components are integrated on the housing 41, and the disposable syringe 2 does not need to integrate electronic structures, which greatly reduces the cost of use. During use, only the disposable syringe 2 needs to be quickly replaced and installed, solving the problem that existing devices are difficult to combine with disposable syringe 2 and have high operating costs, balancing safety and economy; at the same time, the hose 433 can flexibly adapt to the installation position of the disinfection cap 441 to ensure stable delivery of disinfectant. The coordinated work of all structures further improves the practicality of the device. The bottom of the syringe 2 is closely connected to the bottom of the housing 1, and the syringe 2 can only be inserted or pulled out from the top, not pulled out from the bottom. With the help of the limiting mechanism 5, the syringe 2 can be stably locked and fixed.

[0037] The controller used in this technical solution is an STM32F030C8T6 microcontroller, which is installed inside the housing 41 near the control switch 42. The battery is a 3.7V / 800mAh-1500mAh lithium polymer battery to power the entire circuit system.

[0038] The control switch 42 is a single-pole double-throw push-button switch (operating voltage 0-30V, rated current 1A). Its input terminal is connected to the positive terminal of the battery, and its output terminal is connected to the controller, the micro pump 432, and the ultraviolet disinfection lamp 448 respectively. The micro pump 432 is a DC30E type DC micro liquid pump (operating voltage 3V-6V, rated flow 100mL / min-300mL / min, rated current 0.5A-1A). Its power supply pin is connected to the GPIO pin (PA0) of the controller through a wire, and its control pin is connected to the PWM pin (PB1) of the controller.

[0039] In the circuit connection, the positive terminal of the battery is first regulated by an AMS1117-3.3V voltage regulator chip (output voltage 3.3V±1%, output current 0-1A) to power the controller. The controller outputs high and low level signals through GPIO pins to control the start and stop of the micro pump 432 and the on and off of the ultraviolet disinfection lamp 448. It outputs pulse signals through PWM pins to adjust the speed of the micro pump 432 to control the output of disinfectant. The electronic components are connected by wire soldering, and the interfaces are reinforced with terminal plugs to ensure stable circuit connection.

[0040] The scope of protection of this application does not involve improvements to the electronic components of the device or equipment. Therefore, the working principles of each electronic component are not described in detail here. The electronic components in this application are all conventional electronic components used in the prior art. They are all conventional technical means in the prior art, and the application of the prior art is very mature. Therefore, they will not be elaborated here.

[0041] Of course, there may be other implementations of this utility model. Based on this implementation, other implementations obtained by those skilled in the art without any creative effort are all within the scope of protection of this utility model.

Claims

1. An injection pen with disinfection function, characterized in that, Includes a housing (1), a syringe (2) is inserted inside the housing (1), an injection needle (3) is fixedly connected to the bottom of the syringe (2), a sterilization mechanism (4) is fixedly connected to the lower end of the housing (1), and a limiting mechanism (5) is fixedly installed at the upper end of the housing (1), with the limiting mechanism (5) and the top of the syringe (2) engaging. The limiting mechanism (5) includes a side shell (51), which is fixedly connected to the upper side of the housing (1). A torsion spring (52) is fixedly connected inside the side shell (51). A turntable (53) is fixedly installed on the top of the torsion spring (52). A fixing block (54) is fixedly installed on the top of the turntable (53). A limiting plate (55) is fixedly installed on the outside of the fixing block (54). The disinfection mechanism (4) includes a box (41), which is fixedly installed on the lower side of the shell (1). The box (41) is equipped with a storage battery inside. A control switch (42) is fixedly connected to one side of the box (41). A supply component (43) is provided on the outside of the box (41). A disinfection component (44) is installed at the bottom of the supply component (43). The supply component (43) includes a tank (431), which is fixedly connected to the outside of the box (41). A micro pump (432) is fixedly installed at the bottom of the tank (431). A hose (433) is fixedly connected to the output end of the micro pump (432). The disinfection component (44) is fixedly connected to the outer end of the hose (433). The disinfection assembly (44) includes a disinfection cap (441) and a first magnetic ring (442). The first magnetic ring (442) is fixedly connected to the bottom of the housing (1). The disinfection cap (441) is fixedly connected to the lower end of the hose (433). A second magnetic ring (443) is fixedly installed on the top of the disinfection cap (441). An annular tube (444) is fixedly installed on the upper inner end of the disinfection cap (441). The input end of the annular tube (444) is connected to the output end of the hose (433). Disinfection pipes (445) are fixedly connected to the bottom of the annular tube (444) in a ring-shaped arrangement at equal intervals. Disinfection nozzles (446) are fixedly connected to the inner side of the disinfection pipes (445) in a linear arrangement at equal intervals.

2. The injection pen with disinfection function according to claim 1, characterized in that, The bottom of the turntable (53) is fixedly connected to a rotating shaft (56), and the bottom end of the rotating shaft (56) passes through the side shell (51) and is fixedly installed with an adjusting plate (57).

3. The injection pen with disinfection function according to claim 1, characterized in that, The limiting plate (55) is generally arranged in a semi-circular shape. The limiting plate (55) covers the top side of the syringe (2). The bottom of the limiting plate (55) and the top side of the syringe (2) sleeve are fitted together.

4. The injection pen with disinfection function according to claim 3, characterized in that, The input end of the micro pump (432) is connected to the inside of the tank (431), and a disinfectant addition tube (434) is fixedly connected to the top of the tank (431). A sealing cap (435) is threadedly connected to the top of the disinfectant addition tube (434).

5. An injection pen with disinfection function according to claim 4, characterized in that, The inner side of the disinfection cover (441) is fixedly installed with a fixed bracket (447) arranged in a ring at equal intervals. The inner side of each fixed bracket (447) is fixedly connected with an ultraviolet disinfection lamp (448). Each fixed bracket (447) is set at the gap of each disinfection pipe (445).

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