Pressurized multi-injection needle device and method for enhancing vaccine injection

Abstract

The invention relates to a pressurized multi-injection-needle device for enhancing vaccine injection and a method thereof.The device comprises a shell, a handle frame, a medicine feeding mechanism, a pneumatic propelling mechanism, a triggering mechanism and a medicine conveying mechanism, the handle frame and the shell are fixedly installed together, the medicine conveying mechanism is arranged in the shell, and the medicine feeding mechanism and the pneumatic propelling mechanism are installed on the shell; and the triggering mechanism is arranged on the shell and is communicated with the pneumatic mechanism. The device is not only an improvement on an existing method, but also a key progress in the technical field of veterinary vaccine administration, simplifies and improves the efficiency of large-scale vaccination activities, and ensures that animals are fully benefited from mRNA vaccines. The method has far-reaching influence on animal health, not only is hopeful to improve immune response and reduce the need of enhancing vaccination, but also is hopeful to reduce the overall vaccination cost.

Description

Technical Field

[0001] The present invention relates to a pressurized multi-needle injection device, and in particular to a pressurized multi-needle injection device and method for boosting vaccine injections, which is primarily used for intramuscular injections of drugs, including but not limited to vaccines. The device operates under gas pressure, in particular carbon dioxide gas, and has a unique valve and piston system for safely and efficiently injecting drugs. Background Art

[0002] The advent of mRNA vaccine technology represents a revolutionary development in veterinary medicine, offering unprecedented possibilities for the prevention of infectious diseases in animals. These vaccines induce cells to produce proteins that can trigger an immune response, thereby greatly improving disease management and prevention in livestock, domestic animals, and humans. However, the efficacy of mRNA vaccines depends largely on the efficiency of injection. Traditional methods often rely on traditional syringes, which have the disadvantage of not ensuring that the vaccine is effectively taken up by the most appropriate cells. Due to the lack of a precise and effective injection method, mRNA vaccines remain largely underdeveloped, especially in terms of addressing the challenges of large-scale vaccination in veterinary medicine and changes in animal physiology that complicate drug administration.

[0003] There are also high risks in animal health management, as poor immune responses due to inefficient vaccination can lead to large-scale outbreaks, which have an impact not only on animals but also on food security and public health. In particular, the agricultural sector faces major challenges due to the limitations of current vaccine administration technologies, as inefficiencies can lead to incomplete immunization coverage, necessitating repeated vaccinations or booster shots, which not only increases the burden on livestock managers and veterinarians, but also increases costs and complicates logistics, while also increasing the threat of infectious diseases. Summary of the invention

[0004] In view of the above-mentioned shortcomings of traditional syringes in the prior art that cannot ensure that the vaccine can be effectively acquired by the most suitable cells, in order to meet the current urgent needs, the present invention provides a pressurized multi-injection needle device and method for enhancing vaccine injection, the device includes a sophisticated internal mechanism for releasing pressurized gas to generate pressure, a sleeve for starting the mechanism, an inner cavity for directly placing the drug, a system for placing the drug into the device, and a sleeve mechanism surrounding the needle connection point. The device completely changes the administration method of mRNA vaccines in animals through the high-pressure injection system, significantly enhancing the cellular uptake efficiency of mRNA molecules, which is the key to activating the immune response required by animals. By optimizing the injection process, it ensures that the mRNA vaccine fully realizes its potential and provides a strong defense for livestock and domestic animals against infectious diseases.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a pressurized multi-injection needle device for enhancing vaccine injection, the device includes a shell, a handle frame, a drug delivery mechanism, a pneumatic propulsion mechanism, a trigger mechanism and a drug delivery mechanism, the handle frame is fixedly installed together with the shell, the drug delivery mechanism is arranged inside the shell, the drug delivery mechanism and the pneumatic mechanism are respectively installed on the shell and are arranged corresponding to the drug delivery mechanism, and the trigger mechanism is installed on the shell and is connected to the pneumatic mechanism.

[0006] The drug delivery device is a drug delivery device for rapid intramuscular injection using pressurized gas, which includes a delicate internal mechanism for releasing pressure generated by the pressurized gas, a sleeve for activating the mechanism, an inner cavity for directly placing the drug, a system for placing the drug into the device, and a sleeve mechanism surrounding the needle connection point.

[0007] The device is not only an improvement over existing methods, but also a key advance in veterinary vaccine delivery technology, simplifying and increasing the efficiency of large-scale vaccination campaigns, ensuring that animals fully benefit from mRNA vaccines. The impact on animal health is profound, not only with the potential to improve immune responses and reduce the need for booster vaccinations, but also to reduce overall vaccination costs.

[0008] A method for using a pressurized multi-injection needle for booster vaccine injections, the method comprising the following operations: Operation 100 provides a device for administering a drug by intramuscular injection; Operation 102 operates a pressure source for supplementing a specific gas; Operation 104 provides a component in the device to prevent the simultaneous opening of two gas flows, the component consisting of two valves, one valve is responsible for starting the system to allow gas to enter a chamber, in which the gas and liquid are separated by a piston with a seal, and the second valve is used to retract the actuator from the chamber, using a piston connected to the same rod as the piston in the gas-liquid chamber to achieve the necessary separation of the rod seal, and the two valves cannot be opened at the same time; Operation 106 is a component of the device, which is safely separated by another component such as a seal, and the operation of the piston is controlled and adjusted to ensure accurate injection of liquid medicine, allowing the pressurized multi-needle injection device to safely and effectively inject a certain dose of medicine by ensuring the separation of gas and liquid; Operation 110 involves a safety feature covering the needle and the first poppet valve activated by contact, including a sleeve or protective cover for protecting the needle when not in use, when the sleeve contacts the patient's skin surface or injection surface, it triggers the opening of the first poppet valve, allowing pressurized gas to enter the gas-liquid chamber of the actuator, and then the gas pressure drives the piston sealed with an O-ring or other type of seal to inject the liquid drug through the dedicated needle; Operation 112 involves providing a safety feature within the pressurized multi-injection needle device, the mechanism automatically cooperating to stop the flow of gas when the pressure within the device reaches a predetermined limit; Operation 114 involves providing a component in the device responsible for quickly releasing gas pressure, and selecting a valve compatible with the gas pressure system when installing; Operation 118 provides a safety feature that automatically overrides manual operation once the action within the device is completed; Operation 120 involves providing a component within the device that ensures that once the liquid enters the gas-liquid chamber, it will not flow out of the inlet channel, and the component only allows the liquid to flow in one direction to prevent reverse flow; Operation 122 involves a process of transferring a liquid drug into a gas-liquid chamber of a pressurized multi-needle injection device by using a peristaltic pump; Operation 126 involves two configurations for use with the device, the first configuration being an extended handle for use in situations where a distance between the user and the person being injected is required, and the second configuration being optimized for close-range drug delivery, which configuration is suitable for use in situations where an administrator can safely interact with a patient or animal at close range; Operation 128 provides a safety mechanism for ensuring the integrity of the injection device during operation, involving a Luer lock mechanism for securely connecting the needle to a syringe or similar device; Operation 130 is the application scope of the multi-point injection drug administration configuration of the device, which covers the veterinary environment, expands to the human medical environment and other injection fields, and the device can inject multiple drugs.

[0009] The technical solution adopted by the present invention to solve the technical problem further includes: The shell comprises a first shell and a second shell. The first shell and the second shell are two left and right half shells. The first shell and the second shell are buckled together to form a whole shell.

[0010] The handle frame comprises a first handle frame and a second handle frame. The first handle frame and the second handle frame are two left and right halves. The first handle frame and the second handle frame are buckled together to form a handle frame as a whole. The handle frame is fixedly installed at the rear end of the shell.

[0011] A trigger slider is installed at the front end of the shell, a rubber pad is installed at the front end of the trigger slider, a trigger limit slider is buckled on the trigger slider, the trigger limit slider is fixedly installed on the osmotic regulator at the front end position, one or more adjustment holes are opened at corresponding positions on the trigger slider, a trigger is fixedly installed at the rear end position of the trigger limit slider, and the trigger and the trigger limit slider are fixedly installed together.

[0012] NdFeB magnets are fixedly mounted at corresponding positions inside the rubber pad and on the outer shell.

[0013] The shell is fixedly provided with a gas tank adapter frame for installing a compressed gas tank, the gas tank adapter frame is fixedly installed on the shell, and the gas tank adapter frame is fixedly installed below the shell and is correspondingly arranged with the bottle adapter.

[0014] The drug delivery mechanism comprises a bottle adapter, a container, a peristaltic pump and a liquid tube. The bottle adapter is arranged on the shell, the container is mounted on the bottle adapter, the bottle adapter is fixedly mounted above the shell, and the liquid inlet of the peristaltic pump is connected to the bottle adapter through a pipeline.

[0015] The liquid pipe is connected to the medicine liquid inlet of the medicine delivery mechanism through a pagoda joint, and a check valve is connected to the liquid pipe.

[0016] The pneumatic propulsion mechanism includes an air tank adapter frame, a compressed air tank, an air pipe, an airflow directional control valve and an airflow control valve. The air inlet of the airflow directional control valve is connected to the air tank adapter frame through the air pipe. The airflow directional control valve is provided with two air outlets. The two air outlets are respectively connected to the air inlet of the drug delivery mechanism through an air pipe. The airflow control valve is connected to one of the air pipes connected to the air outlet of the airflow directional control valve. The airflow control valve is fixedly installed inside the shell by a fixing screw, and the adjustment knob of the airflow control valve extends to the outside of the shell.

[0017] The trigger mechanism includes a trigger, an airflow directional control valve and an electronic control part. The trigger button of the airflow directional control valve is arranged on the motion track of the trigger. The electronic control part includes a relay, a control circuit board and a battery. The relay and the control circuit board are respectively fixedly installed in the shell. The battery is fixedly installed in the shell through a battery rack. A battery cover is installed on the shell at a position corresponding to the battery position. A battery charging module is installed on the shell, and the battery charging module is connected to the control circuit board.

[0018] The control circuit board is equipped with a display screen, which is installed in the housing through display screen mounting screws, and buttons are installed on the control circuit board.

[0019] The drug delivery mechanism comprises a cylinder, an actuating gas rod, a first piston, a second piston, a rubber stopper, a front end cover adapter and a needle adapter. A front chamber and a rear chamber are arranged inside the cylinder. The first piston is arranged in the rear chamber, and the second piston is arranged in the front chamber. The first piston and the second piston are fixedly connected together through the actuating gas rod, and the rubber stopper is fixedly installed on the second piston. A front end cover adapter is fixedly installed at the front end of the cylinder, a second O-ring is arranged between the front end cover adapter and the cylinder, and a needle adapter is fixedly installed on the front end cover adapter. A small sealing ring is sleeved on the actuating gas rod, and the small sealing ring is arranged at the dividing part of the front chamber and the rear chamber. The front chamber is divided into a liquid chamber and a first gas chamber by the second piston, and the rear chamber is the second gas chamber. A large sealing ring is arranged between the second piston and the cylinder, and a large sealing ring is arranged between the first piston and the cylinder. The liquid pipe is connected to the liquid chamber in the front chamber, an air pipe with an airflow control valve is connected to the second gas chamber, and another air pipe is connected to the first gas chamber.

[0020] A cylinder end cover is installed at the rear end of the cylinder, a first O-ring is arranged between the cylinder end cover and the cylinder, and a flat head nut is installed on the cylinder, and the cylinder end cover is locked by the flat head nut.

[0021] The multi-port needle includes a connector, a main liquid tube and one or more liquid dispensing tubes. The rear end of the main liquid tube is connected to the connector, and the one or more liquid dispensing tubes are respectively connected to the front end of the main liquid tube in a circular arrangement. The front end of the liquid dispensing tube is a needle tip, and a front liquid outlet hole is opened at the needle tip.

[0022] One innovation of the present invention is that multiple needles are integrated into one unit, and each needle has multiple side holes instead of just one end hole. The specific technical solution is as follows: According to the embodiment, the device provided by the present invention is uniquely designed, integrating multiple needles into one assembly. Unlike the traditional single needle design, each needle in the assembly is provided with multiple side holes along its length direction, instead of only a single hole at the tip. This design cooperates with the pressurized gas mechanism to more disperse and effectively inject drugs into the muscle. Once started, the device releases pressurized gas, which cooperates with the internal mechanical device to quickly push the liquid drug through these side holes to ensure that the drug is evenly distributed in the muscle tissue. Moreover, regardless of the position of the sleeve, the device will automatically turn off the gas and reset to the initial state to prepare for subsequent use. This needle assembly has a wider drug dispersion ability during injection, which may improve the absorption rate and therapeutic effect.

[0023] The side surface of the liquid dispensing tube is provided with more than one side liquid outlet hole.

[0024] The connector is a Luer lock connector.

[0025] The operation 100 includes a sub-operation 100-a, which is performed using a pressurized gas source, which is used as a propellant for injectable drugs, and a method for replenishing the gas source uses a sub-operation 100-b box or gas tank.

[0026] The method also includes operation 108 involving a safety feature, which automatically stops the gas supply once the driving action in the device is completed. The mechanism of operation 108 includes a system for detecting the completion of the actuator action. When the driving end point is reached, the system cooperates to stop the gas flow, which is achieved by mechanical methods or performed by electrical methods.

[0027] The method further includes operation 124 involving setting up a sterilization system in the pressurized multi-needle injection device, wherein a sterilant in the system enters through a check valve and is also used to introduce a drug into the gas-liquid chamber, and the sterilant typically includes isopropyl alcohol and distilled water.

[0028] The beneficial effects of the present invention are: the device in the present invention completely changes the way mRNA vaccines are administered in animals through a high-pressure injection system, significantly enhancing the cellular uptake efficiency of mRNA molecules, which is the key to activating the immune response required by animals, and by optimizing the injection process, ensuring that mRNA vaccines fully realize their potential, providing a strong defense against infectious diseases in livestock and domestic animals.

[0029] The device is not only an improvement over existing methods, but also a key advance in veterinary vaccine delivery technology, simplifying and increasing the efficiency of large-scale vaccination campaigns, ensuring that animals fully benefit from mRNA vaccines. The impact on animal health is profound, not only with the potential to improve immune responses and reduce the need for booster vaccinations, but also to reduce overall vaccination costs.

[0030] Therefore, the invention provides a critical solution for the effective administration of mRNA vaccines to address the most pressing challenges in veterinary medicine. This marks a major step forward in ensuring that the revolutionary potential of mRNA vaccine technology is fully realized in animal populations, thereby enhancing disease prevention, improving animal welfare, and ensuring the safety of the food supply chain. This breakthrough device is initially focused on transforming vaccine administration in veterinary medicine, but also has great potential for future human medical applications, which can completely change the way mRNA vaccines are administered in the human population.

[0031] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the three-dimensional structure of the pressurized multiple injection needle device used for boosting vaccine injection in the present invention.

[0033] Figure 2 This is a schematic diagram of the internal structure of the front end portion of the pressurized multiple injection needle device used for boosting vaccine injection in the present invention.

[0034] Figure 3 This is a schematic diagram of the internal structure of the middle part of the pressurized multiple injection needle device used for booster vaccine injection in the present invention.

[0035] Figure 4 It is a schematic diagram of the internal structure of the injection needle part in the present invention.

[0036] Figure 5 It is a schematic diagram of the internal structure of part of the injection needle propulsion device in the present invention.

[0037] Figure 6 It is a schematic diagram of the front view structure of the injection needle part in the present invention.

[0038] Figure 7 It is a partial cross-sectional structural schematic diagram of the injection needle in the present invention.

[0039] Figure 8 It is a schematic diagram of the three-dimensional structure of the needle head of the injection needle in the present invention.

[0040] Fig. 9 It is a schematic diagram of the top view of the needle part of the injection needle in the present invention.

[0041] Fig.10 It is a schematic diagram of the front view structure of the needle head of the injection needle in the present invention.

[0042] Fig.11 It is a schematic diagram of the side view of the needle part of the injection needle in the present invention.

[0043] Fig.12 It is a schematic diagram of the left view of the structure of the pressurized multiple injection needle device used for booster vaccine injection in the present invention.

[0044] Fig.13 It is a schematic diagram of the front view of the structure of the pressurized multiple injection needle device used for boosting vaccine injection in the present invention.

[0045] Fig.14 It is a schematic diagram of the rear view structure of the pressurized multiple injection needle device used for booster vaccine injection in the present invention.

[0046] Fig.15 It is a bottom view structural schematic diagram of the pressurized multiple injection needle device for booster vaccine injection in the present invention.

[0047] Fig.16 It is a schematic diagram of the top view of the structure of the pressurized multiple injection needle device used for booster vaccine injection in the present invention.

[0048] Fig.17It is a schematic diagram of the right side structure of the pressurized multiple injection needle device used for booster vaccine injection in the present invention.

[0049] Fig.18 Flow chart of the method in the present invention. Fig.19 It is a system block diagram of the present invention.

[0050] In the figure, 1-first housing, 2-second housing, 3-trigger slider, 4-M4 flat head screw, 5-osmotic regulator, 6-trigger limit slider, 7-trigger, 8-cylinder assembly, 9-bottle adapter, 10-push-on elbow fitting, 11-air flow control valve, 12-air flow directional control valve, 13-push-on straight connector, 14-pagoda connector, 15-check valve, 16-peristaltic pump, 17-air pipe, 18-liquid pipe, 19-battery rack , 21-container, 22-battery charging module, 23-first handle frame, 24-second handle frame, 25-display screen, 26-control circuit board, 27-battery, 29-display screen mounting screws, 30-slide switch, 31-relay, 32-NdFeB magnet, 33-rubber pad, 34-battery cover, 35-button, 37-compressed gas tank, 38-gas tank adapter frame, 39-fixing screws, 40-M3.9 screws, 41- M4 square nut, 42- flat end point, 44- actuating gas rod, 45- cylinder, 46- small sealing ring, 47- first piston, 48- large sealing ring, 49- cylinder end cover, 50- first O-ring, 51- front end cover adapter, 52- second piston, 53- G1-4 adapter, 54- rubber stopper, 55- piston sealing ring, 56- multi-port needle, 57- flat head nut, 58- flat head screw, 59- second O-ring, 60- connector, 61- main liquid pipe, 62- liquid distribution pipe, 63- side liquid outlet, 64- front liquid outlet. DETAILED DESCRIPTION

[0051] This embodiment is a preferred implementation mode of the present invention. Other embodiments whose principles and basic structures are the same or similar to those of this embodiment are within the protection scope of the present invention.

[0052] The present invention mainly protects a pressurized multi-injection needle device for enhancing vaccine injection, which mainly includes a shell, a handle frame, a drug delivery mechanism, a pneumatic propulsion mechanism, a trigger mechanism and a drug delivery mechanism. The handle frame is fixedly installed together with the shell, the drug delivery mechanism is arranged inside the shell, the drug delivery mechanism and the pneumatic mechanism are respectively installed on the shell and are arranged corresponding to the drug delivery mechanism, and the trigger mechanism is installed on the shell and is connected to the pneumatic mechanism.

[0053] In this embodiment, the shell includes a first shell 1 and a second shell 2, which are two left and right half shells, and the first shell 1 and the second shell 2 are buckled together to form a shell as a whole. The handle frame includes a first handle frame 23 and a second handle frame 24, which are two left and right halves, and the first handle frame 23 and the second handle frame 24 are buckled together to form a handle frame as a whole. The handle frame is fixedly installed at the rear end of the shell to facilitate the user to grasp. For ease of use, the "extended handle" is configured in different operating situations. The needle can use the extended handle for long-distance medication or close-range medication, which is multifunctional.

[0054] In this embodiment, a trigger slider 3 is installed at the front end of the shell, a rubber pad 33 is installed at the front end of the trigger slider 3, a trigger limit slider 6 is buckled on the trigger slider 3, the trigger limit slider 6 can drive the trigger slider 3 to slide forward and backward on the shell, the trigger limit slider 6 is fixedly installed at the front end position of the osmotic regulator 5, and one or more adjustment holes are opened at the corresponding position on the trigger slider 3, and the osmotic regulator 5 can be inserted into different adjustment holes as needed. A trigger 7 is fixedly installed at the rear end position of the trigger limit slider 6, and the trigger 7 is fixedly installed with the trigger limit slider 6 through one or more M4 flat head screws 4. In this embodiment, three M4 flat head screws 4 are provided, and one, two or more screws can also be provided according to actual needs. In this embodiment, NdFeB magnets 32 are fixedly installed at the corresponding positions inside the rubber pad 33 and on the shell, respectively, and the "piston positioning mechanism" uses magnets or mechanical methods to maintain the position of the piston during the needle removal process. The "self-closing mechanism" ensures that the valve is automatically closed after operation, and the "check valve system" prevents drug reflux. A "peristaltic liquid pump" introduces the drug into the chamber and a "disinfection system" connected to a non-return valve cleans the chamber with a disinfectant. The needle has a mechanical safety system that prevents accidental discharge or overpressure. This system can be implemented with sensors and electronics. The needle guard is another safety feature that prevents accidental needle sticks and initiates the injection process only upon contact.

[0055] In this embodiment, a bottle adapter 9 is fixedly provided on the housing, and a container 21 is installed on the bottle adapter 9. The container 21 is used to hold liquid medicine. In this embodiment, the bottle adapter 9 is fixedly installed above the housing. In specific implementation, the bottle adapter 9 can also be set at other positions on the housing according to actual needs, or can also be connected to the container 21 in the form of a liquid medicine interface. In this embodiment, a gas tank adapter frame 38 is fixedly provided on the housing. The gas tank adapter frame 38 is fixedly installed on the housing by M3.9 screws 40. In specific implementation, other mounting structures can also be used to fix the gas tank adapter frame 38 on the housing. The gas tank adapter frame 38 is used to install a compressed gas tank 37. In this embodiment, the gas tank adapter frame 38 is fixedly installed below the housing, and is preferably arranged corresponding to the bottle adapter 9 to achieve the best rationalization of space design. In specific implementation, the gas tank adapter frame 38 can also be set at other positions on the housing according to actual needs, or can also be connected to the compressed gas tank 37 in the form of a gas interface.

[0056] In this embodiment, in addition to the bottle adapter 9 and the container 21, the drug delivery mechanism also includes a peristaltic pump 16 and a liquid tube 18. The liquid inlet of the peristaltic pump 16 is connected to the bottle adapter 9 through a pipeline. When it is specifically implemented, the liquid inlet of the peristaltic pump 16 can also be directly connected to the bottle adapter 9. The liquid outlet of the peristaltic pump 16 is connected to the liquid inlet of the drug delivery mechanism through the liquid tube 18. The liquid in the container 21 can be delivered to the drug delivery mechanism through the peristaltic pump 16 and the liquid tube 18. In this embodiment, the liquid tube 18 is connected to the liquid inlet of the drug delivery mechanism through the pagoda connector 14. The peristaltic liquid pump is a subassembly for transferring the drug to the chamber. It realizes its function by alternately squeezing and releasing the flexible body, and the flexible body pushes the liquid forward. The pump can be manually operated, and the way of introducing the drug into the chamber provides more adaptability. In this embodiment, a check valve 15 is also connected to the liquid tube 18, and the check valve system is a subassembly for ensuring the unidirectional flow of the liquid drug. It opens under pressure applied by the peristaltic pump during injection and closes immediately after injection to prevent drug backflow, a feature that is critical to maintaining drug sterility.

[0057] In this embodiment, in addition to the above-mentioned air tank adapter frame 38 and compressed air tank 37, the pneumatic propulsion mechanism also includes an air pipe 17, an airflow directional control valve 12 and an airflow control valve 11. The air inlet of the airflow directional control valve 12 is connected to the air tank adapter frame 38 through the air pipe 17. Push-on straight-through connectors 13 are respectively provided at both ends of the air pipe 17, which are respectively connected to the air inlet of the airflow directional control valve 12 and the air tank adapter frame 38 through the push-on straight-through connectors 13. The airflow directional control valve 12 is provided with two air outlets, and the two air outlets are respectively connected to the air inlet of the drug delivery mechanism through an air pipe 17. The air pipe 17 and the air outlet of the airflow directional control valve 12 are connected through the push-on straight-through connector 13, and the air pipe 17 and the air inlet of the drug delivery mechanism are connected through the push-on elbow fitting 10. In this embodiment, an airflow control valve 11 is connected to one of the air pipes 17 connected to the air outlet of the airflow directional control valve 12. The airflow control valve 11 is fixedly installed inside the housing by a fixing screw 39. The regulating knob of the airflow control valve 11 extends to the outside of the housing, and the airflow through the air pipe 17 can be controlled by the airflow control valve 11. In this embodiment, the airflow control valve 11 as a "valve control mechanism" is composed of two manually operated valves, and its structure can prevent both from opening at the same time, thereby controlling the airflow. The pressurized gas is guided into the "chamber and sealing assembly", where the gas is separated from the liquid drug by a piston with a seal (such as an O-ring seal) to ensure accurate injection. The gas propulsion system is a component of a pressurized multi-needle injection device, which uses the pressure provided by the gas to perform intramuscular injection of vaccines and drugs. The gas that provides the pressure is generally carbon dioxide, but it can also be other gases. The gas can be replenished through a box or a gas tank. In the gas propulsion system, the gas flow control valve 11 includes two valves for regulating the flow of propellant gas. The two valves can only be operated individually to prevent both valves from being opened at the same time, which ensures controlled actuation of the device and the correct flow of gas flow. The gas propulsion system promotes injection by utilizing pressurized gas. When the first valve is opened, the pressurized gas enters the chamber and the sealing assembly, where the gas exerts force on the piston, causing the liquid drug to be discharged through the needle dedicated to intramuscular injection. After the injection is completed, the gas flow is automatically closed to prevent overpressure and ensure safety. This automatic closure is achieved by a mechanism that responds to the completion of the piston action. The precise control of the gas flow in the gas propulsion system and the safe separation of the components enable the device to accurately deliver drugs.

[0058] In this embodiment, in addition to the above-mentioned trigger 7, the trigger mechanism also includes the above-mentioned airflow directional control valve 12. The trigger 7 and the airflow directional control valve 12 together constitute the trigger mechanism. The trigger button of the airflow directional control valve 12 is set on the movement track of the trigger 7. When the trigger 7 moves to a certain position, it can trigger the operation of the airflow directional control valve 12.

[0059] In this embodiment, the trigger mechanism also includes an electric control part, which includes a relay 31, a control circuit board 26 and a battery 27. The relay 31 and the control circuit board 26 are fixedly installed in the housing respectively. The battery 27 is fixedly installed in the housing through a battery holder 19. A battery cover 34 is installed on the housing at a position corresponding to the battery 27. The battery cover 34 can be opened to replace the battery 27. In this embodiment, a battery charging module 22 is installed on the housing. The battery charging module 22 is connected to the control circuit board 26. The battery 27 can be charged through the battery charging module 22. In this embodiment, the battery charging module 22 adopts a TYPE-C interface. When implemented, a standard USB interface, a MINI USB interface or a Micro USB interface can also be used. In this embodiment, a display screen 25 is installed on the control circuit board 26. The display screen 25 is installed in the housing through a display screen mounting screw 29. The working state of the present invention can be displayed through the display screen 25. A button 35 is installed on the control circuit board 26. Operations such as parameter setting can be performed through the button 35.

[0060] In this embodiment, the drug delivery mechanism is mainly a cylinder assembly 8, which includes a cylinder 45, an actuating gas rod 44, a first piston 47, a second piston 52, a rubber stopper 54, a front end cover adapter 51 and a G1-4 adapter 53. The cylinder 45 is provided with a front cavity and a rear cavity. The first piston 47 is arranged in the rear cavity, and the second piston 52 is arranged in the front cavity. The first piston 47 and the second piston 52 are fixedly connected together by the actuating gas rod 44. The rubber stopper 54 is fixedly installed on the second piston 52. A front end cover adapter 51 is fixedly installed at the front end of the cylinder 45. A second O-ring 59 is arranged between the front end cover adapter 51 and the cylinder 45. A G1-4 adapter 53 is fixedly installed on the front end cover adapter 51 for connecting a multi-port needle 56. In this embodiment, the G1-4 adapter 53 adopts a Luer lock adapter. In specific implementation, other adapter structures can also be selected according to the structure of the multi-port needle 56. The "Luer lock safety mechanism" ensures the safety performance of the needle under pressure. The scope of use of the device includes veterinary medicine and humans, meeting various injection needs. In this embodiment, a small sealing ring 46 is mounted on the actuating gas rod 44, and the small sealing ring 46 is arranged at the separation of the front chamber and the rear chamber, which can ensure the airtightness between the front chamber and the rear chamber. The front chamber is divided into a liquid chamber and a first gas chamber by the second piston 52, and the rear chamber is a second gas chamber. A large sealing ring 48 is arranged between the second piston 52 and the cylinder 45 to ensure the sealing between the second piston 52 and the cylinder 45. The chamber and sealing assembly are another sub-component, including a gas-liquid chamber arranged in the actuator. The piston with a seal (such as an O-type seal) can maintain safe separation between gas and liquid, which is crucial to prevent mixing and ensure that the drug is ejected through the needle without contamination. A large sealing ring 48 is arranged between the first piston 47 and the cylinder 45 to ensure the sealing between the first piston 52 and the cylinder 45. In this embodiment, a cylinder end cap 49 is installed at the rear end of the cylinder 45, and a first O-ring 50 is arranged between the cylinder end cap 49 and the cylinder 45 to ensure the sealing between the cylinder end cap 49 and the cylinder 45. A flat head nut 57 is installed on the cylinder 45, and the cylinder end cap 49 can be locked by the flat head nut 57 to prevent it from falling off. In this embodiment, the liquid pipe 18 is connected to the liquid chamber in the front chamber, the air pipe 17 with the air flow control valve 11 is connected to the second gas chamber, and the other air pipe 17 is connected to the first gas chamber. The drug delivery mechanism in the present invention adopts a "multi-injection device" for injecting drugs, with an emphasis on intramuscular injection. The device is mainly tailored for mRNA vaccines, and can also handle various other injectable substances. It adopts a "gas propulsion system" that relies on a specific type of gas to provide pressure, and the pressure can be supplemented by a gas cylinder or gas tank. The needle is equipped with a Luer lock safety mechanism, which is a standardized accessory that ensures a safe connection with the syringe and can withstand the injection syringe pressure.

[0061] In this embodiment, the multi-port needle 56 mainly includes a connector 60, a main liquid tube 61 and one or more liquid dispensing tubes 62. The connector 60 in this embodiment adopts a Luer lock connector. The rear end of the main liquid tube 61 is connected to the connector 60. One or more liquid dispensing tubes 62 are respectively connected to the front end of the main liquid tube 61. In this embodiment, six liquid dispensing tubes 62 are arranged in a ring at the front end of the main liquid tube 61. During specific implementation, the number and arrangement of the liquid dispensing tubes 62 can be specifically set according to actual needs. In this embodiment, one or more side liquid outlet holes 63 are opened on the side of the liquid dispensing tube 62, and the front end of the liquid dispensing tube 62 is a needle tip, and a front liquid outlet hole 64 is opened at the needle tip. The present invention uses a "special injection needle" for multi-point injection, which distributes liquid through multiple cavities and injection points. The special injection needle is a component of a pressurized multi-needle injection device, which is designed for intramuscular injection of vaccines and other drugs. The needle is mainly tailored for intramuscular injection, which can ensure the effectiveness and safety of the drug injection process. The dedicated injection needle is part of a multi-injection device designed to facilitate precise injection of medication into muscle tissue, driven by high pressure provided by a gas propulsion system. The system uses carbon dioxide gas, which can be replenished through a box or gas tank. The dedicated injection needle uses a pressurized system to administer the drug. The structure of the needle allows multi-chamber injection, where the liquid drug enters one chamber and is divided into multiple needles, with multiple injection points, ensuring that the drug is widely distributed in the muscle tissue.

[0062] The safety features in the invention include a "mechanical safety system" that shuts off the gas supply after the injection is completed, a "needle protection sleeve" that covers the needle and activates the first valve when contacted, and an "automatic gas shut-off device" to prevent overpressure. In addition, a "quick exhaust valve" quickly releases gas when needed.

[0063] The mechanical safety system integrated into the needle assembly is implemented in such a way that it shuts off the gas propellant once the injection process is completed to prevent accidents. The needle guard acts as a physical barrier, covering the needle when not in use, activating the injection mechanism when contacted. The needle is securely connected to the syringe with a Luer lock safety mechanism. The needle is used with an extendable handle to meet different medical environments and user preferences.

[0064] The automatic shut-off gas device within the pressurized multi-needle injection device controls the internal gas pressure used to push the medication through the needle holes. The device ensures the safety and effectiveness of the device by preventing over-pressurization and automatically shutting off the gas flow after the injection is completed.

[0065] The automatic gas shut-off device consists of two sub-components: the quick exhaust valve and the piston positioning mechanism. The quick exhaust valve is responsible for the rapid release of gas from the system, stopping immediately at the end of injection. This design facilitates the exhaust of excess gas and helps control the injection process.

[0066] The piston retaining mechanism ensures that the piston within the device is maintained in position between activation and retraction. The mechanism can use a variety of methods, including magnets, locking mechanisms, springs, and latches, to keep the piston stable and prevent any unintentional movement that could cause injury or equipment failure.

[0067] In operation, the automatic shut-off gas device regulates internal pressure by automatically shutting off the gas flow through the quick exhaust valves after the injection is completed. These valves exhaust excess gas to prevent overpressure, and the timing of this action is synchronized with the completion of the drug injection. At the same time, the piston positioning mechanism fixes the piston during the transition from activation to retraction, ensuring safe disengagement of the needle. The piston is not released until the system resets for the next injection action to ensure controlled operation throughout the process.

[0068] Mechanisms are provided in pressurized multi-needle injection devices to automatically close the valve after operation. The mechanism is activated at the end of the movement, such as when the injection is completed, to close the valve without continuous manual pressure, to prevent over-pressurization, and to prepare the device for the next use by ensuring that the valve is in the closed state.

[0069] These components work together to enable controlled infusion of medication, ensuring the device operates effectively while maintaining safety and sterility. The self-closing mechanism, check valve system and peristaltic liquid pump are critical to the function of the device, allowing it to precisely inject medication.

[0070] The sterilization system is part of a pressurized multi-needle injection device designed for intramuscular drug injections. The system is responsible for ensuring the sterility of the fluid chambers within the device, which is critical to the effectiveness of the injected drug.

[0071] The sterilization system consists of an extension handle and a Luer lock safety mechanism. The extension handle is designed to facilitate the use of the device while providing advantages for close-range operation and extended handle operation, easy to use and precise operation when injecting medications. The Luer lock safety mechanism is a standardized accessory used to secure the needle to the device, ensuring that the needle remains connected to the device, preventing accidental disconnection during the injection process, causing potential injury or contamination.

[0072] The sterilization system utilizes a check valve system to flow disinfectants such as isopropyl alcohol and distilled water through the needle to clean the internal passages. An extension handle provides the user with the leverage needed to initiate the sterilization process. The Luer lock safety mechanism secures the needle to the device during high-pressure injections, maintaining a sterile environment by preventing the needle from falling out and exposing the system to potentially contaminated environments. These subassemblies work together to maintain the sterility of the device, which is critical to ensuring patient safety and the efficacy of the injected medication.

[0073] The scope of use gives a range of applications for the pressurized multi-needle injection device, which is used to inject vaccines and other drugs. The device is mainly used in veterinary medicine, but can also be used in human medicine. The device is capable of multi-point injection, which can achieve better treatment results in certain medical scenarios.

[0074] The device is suitable for a variety of medical practices and treatment protocols, meeting the requirements of animal treatment and is also suitable for human surgery. The device is designed with the need to dispense medications at multiple injection sites in mind.

[0075] Veterinarians use the device to vaccinate and inject drugs to animals, ensuring efficient and effective treatment. Humans use the device to integrate into different medical processes to improve patient treatment outcomes through multi-point precision injection of drugs. The device can be optimized to suit the specific needs of treatment or patients, thus adapting to different application scenarios and having a wide range of applicability in different fields.

[0076] The present invention also protects a method for using a pressurized multiple injection needle for booster vaccine injection, the method comprising the following steps: Step 100 provides a device for administering drugs by intramuscular injection, that is, the drug delivery mechanism mentioned above. The device is suitable for a series of injectable substances, such as vaccines, not only for veterinary or human, but also for other fields requiring multi-point injection.

[0077] As shown in sub-step 100-a, the device is operated using a pressurized gas source (usually CO2), which is used as a propellant for injectable drugs. There are many ways to replenish the gas source, such as using a box or gas tank shown in sub-step 100-b, which is the pneumatic propulsion mechanism mentioned above.

[0078] A gas-liquid chamber (i.e., cylinder assembly 8) is provided in the device, in which a piston with a seal ensures that the gas is separated from the liquid drug, which is crucial to the operation of the device and can control the drug to be ejected from the dedicated needle.

[0079] Safety mechanisms built into the device include a system that automatically shuts off the gas after the injection is complete, a sleeve that covers the needle and activates the valve when contacted, and an automatic shutoff mechanism that prevents over-pressurization of the device. These mechanisms maintain safe operation of the device by preventing accidental exposure of the needle and maintaining appropriate pressure levels.

[0080] The needle has multiple lateral holes along its length, rather than just one hole at the tip, for a more dispersed and efficient injection of medication, and is also equipped with a Luer lock to ensure a secure connection under pressure. The needle helps distribute medication to multiple sites, making the injection process more efficient.

[0081] In summary, step 100 includes the assembly and preparation of a drug delivery device that incorporates a pressurized gas system, a safety mechanism, and a specialized needle for injecting drugs in various applications.

[0082] Step 102 refers to operating a pressure source for specific gas replenishment (ie, the pneumatic propulsion mechanism mentioned above), which is an indispensable component for realizing the function of the pressurized multi-needle injection device because it provides the necessary power for drug injection.

[0083] In this step, pressurized gas is used as the propellant for the device. The gas (usually carbon dioxide) is stored in a replaceable cartridge or refillable gas tank. The gas passes through a pressure regulator to ensure a uniform and controlled output, which is used to drive the drug through the needle and into the patient's body.

[0084] During operation of the device, the user connects a CO2 cartridge or gas tank to the device. The gas then passes through a pressure regulator, which adjusts the pressure to a level that ensures the injection process is safe and effective. Once adjusted, the gas pressure can be directed into the chamber of the actuator when the device is activated.

[0085] The components involved in step 102 include CO2 to provide driving force, a box or gas tank as a supplementary source, and a pressure regulator to control the pressure of the mechanism. CO2 is selected because it can provide a uniform output power suitable for the operation of the device. The box or gas tank can be flexibly selected according to different uses to provide convenience for the operator.

[0086] The purpose of step 102 is to equip the device with a reliable source of pressure to effectively administer the drug. The pressure level must be sufficient to deliver the drug into the muscle without causing damage or discomfort, and the pressure regulator is responsible for maintaining this balance.

[0087] Step 102 is related to preparing the device with a controlled pressurized gas source, which is necessary for the subsequent drug administration process. The carbon dioxide, pressure regulator and gas source supplement work together to enable the device to perform its function.

[0088] Step 104 involves setting up a component (i.e., the aforementioned gas flow directional control valve 12) within the device, which is designed to prevent simultaneous opening. The component consists of two valves, which are necessary components to push the drug out of the needle under the action of other pressures. One valve is responsible for starting the system and allowing gas to enter a chamber where the gas and liquid are separated by a piston with a seal, as described in step 106. This separation ensures that the gas does not mix with the liquid drug, maintaining the integrity of the injection process.

[0089] The second valve is used to retract the actuator from the chamber, using a piston connected to the same rod as the piston in the air-liquid chamber to achieve the necessary separate rod seal. The two valves cannot be opened at the same time, as described in step 112, which is a safety measure to prevent accidental discharge or over-pressurization.

[0090] These valves are manually operated, and the user can use a trigger such as a button or lever to initiate the injection or retraction process. Once the intended operation is completed, the valve automatically returns to the closed position, as described in step 118, stopping further gas flow until the next manual actuation.

[0091] In summary, step 104 focuses on the design and function of two valves within the device. These valves are manually operated and their structural design prevents simultaneous opening, ensuring controlled injection of liquid medication through a dedicated needle and subsequent retraction of the actuator to allow needle removal and preparation of the device for further use.

[0092] Step 106 is a component of the device (i.e. the drug delivery mechanism mentioned above) which is safely separated by another component such as a seal. This step ensures the separation of gas and liquid in the actuator chamber of the pressurized multi-injection needle device. The piston is a cylindrical component that flows in the chamber driven by the gas pressure. The seal is wrapped around the piston to prevent the gas from mixing with the liquid and vice versa, keeping the two separated, because any cross contamination may affect the injection process, and the liquid in the gas chamber may change the pressure state, which may cause the device to malfunction.

[0093] The piston and seal are the main components involved in step 106. The movement of the piston is controlled and regulated to ensure accurate injection of the liquid drug. The function of the seal is to form a barrier to keep the substances separated while allowing the piston to move. The structure of the chamber can accommodate the piston and seal to ensure reliable operation of the device.

[0094] The purpose of these components and their interaction is to enable the device to deliver controlled amounts of medication through a dedicated needle. Because the device delivers medication using pressure, any loss of pressure cannot result in inaccurate dosing, so the integrity of the seal is essential to the device's ability to achieve this function.

[0095] Essentially, step 106 provides a mechanism that allows a pressurized multi-needle injection device to safely and effectively inject a dose of medication by ensuring separation of gas and liquid, which is achieved through the interaction of the piston and the seal.

[0096] Step 108 involves providing a safety feature that automatically stops the gas supply once the actuation action within the device is complete. This step is an essential part of operating a pressurized multi-needle injection device, ensuring that the gas flow is stopped at the appropriate time to maintain a safe pressure level to prevent unintentional injection after drug administration.

[0097] The mechanism of step 108 may include a system that detects the completion of the actuator movement, and when the driving end is reached, the system cooperates to stop the gas flow. This can be achieved by mechanical methods, such as setting a connecting rod that physically blocks the gas passage, or it can be performed by electrical methods, such as a sensor sends a signal to the valve to close it after detecting the end of the movement.

[0098] The purpose of this step is to keep the device within the specified operating pressure range and avoid the potential harm of excessive gas pressure after drug injection. It also prepares the device for needle retraction, ready for subsequent use without manual intervention to cut off the gas supply.

[0099] This safety feature interacts with other components of the device, such as the gas supply, actuators, and control valves. Operating parameters such as pressure range, medication dosage, and actuation speed need to be calibrated. These safety features must be designed to ensure that the device remains functional over multiple uses.

[0100] Step 110 involves the safety features of the covered needle and the first poppet valve activated by contact. This step is critical to the operation of a pressurized multi-needle injection device designed for drug delivery, particularly intramuscular injection of vaccines, including mRNA vaccines.

[0101] The operation of this step includes a sleeve (in this embodiment, a trigger slider 3) or similar protective cover (in this embodiment, a rubber pad 33) to protect the needle when not in use. The sleeve has two functions: one is to act as a physical barrier to prevent accidental needle sticks; the other is to act as a mechanical trigger for the first poppet valve. When the sleeve contacts the patient's skin surface or injection surface, it triggers the opening of the first poppet valve, which allows pressurized gas to enter the gas-liquid chamber of the actuator. The gas pressure then drives the piston sealed with an O-ring or other type of seal to inject the liquid drug through a dedicated needle.

[0102] The components involved in this assembly are the sleeve, needle, first poppet valve and actuator. The sleeve is designed so that it must contact the injection surface to activate the valve, ensuring that the needle is only exposed when the device is pressed against the injection surface, thereby minimizing the risk of accidental exposure or injury. The contact of the sleeve with the injection surface is a prerequisite for initiating the injection process and is an integral part of the safe operation of the device.

[0103] Such safety features may be, but are not limited to, sleeves, or other components that provide similar protection and activation functions, the purpose of which is to ensure that the needle is covered when not in use and that activation of the injection process is controlled and safe, preventing the device from unintentionally releasing drug.

[0104] Step 112 involves providing a safety feature within the pressurized multi-injection needle device that regulates the internal pressure to prevent it from exceeding a set threshold. This step includes a mechanism that automatically cooperates to stop the flow of gas when the pressure within the device reaches a predetermined limit. The component responsible for this function is designed to monitor the internal pressure and shut off the gas supply when necessary.

[0105] The purpose of the mechanism is to reduce the risk of damage to the device or injury to the user or recipient due to excessive pressure. The mechanism may consist of a valve or sensor that is part of a feedback system, detecting when the pressure reaches a safe limit and triggering a response to prevent additional gas from entering to increase the pressure.

[0106] This feature is integrated into the device's system to provide a safe operating environment during the injection of medication, operating autonomously, defaulting to stop further pressurization in the event of a component failure.

[0107] The mechanism is connected to a control system, which may be mechanical or electronic, or a combination of both, which actuates the pressure regulating mechanism based on feedback received from the pressure monitoring component.

[0108] In summary, step 112 ensures that the device includes a mechanism to regulate pressure and prevent over-pressurization, which is critical to the safe operation of the device and the drug delivery process. This step is very important to maintain the integrity of the device when dealing with high pressure systems and injectable drugs.

[0109] Step 114 involves providing a component within the device that is responsible for quickly releasing the gas pressure. This component is called a quick exhaust valve and is installed to ensure that the device operates within the specified pressure range. When installing, valves that are compatible with the gas pressure system are selected, mainly for carbon dioxide gas but not limited to carbon dioxide gas. These valves must be able to withstand the pressures involved and be able to quickly exhaust the gas when necessary to prevent overpressure.

[0110] The valves can be of any suitable type or they can be quick-release valves modified according to the requirements of the equipment, for example according to the required pressure relief speed and the type of gas used. They should be installed in a suitable position within the equipment to achieve their function, taking into account the possibility of subsequent maintenance or replacement and ensuring that they do not interfere with other components, such as pistons or seals.

[0111] The technician or engineer responsible for assembling the medical device will install the valve according to guidelines to maintain the sterility and integrity of the device. The valve is used to protect the equipment and the user from excessive pressure that could cause device failure or improper drug administration, and can be equipped with other mechanisms within the device, such as automatic closing mechanisms (step 112) and self-closing mechanisms of the valve (step 118).

[0112] Step 116 provides a method for maintaining a piston in a fixed position after activation and before retraction within a pressurized multiple injection needle device. This step ensures that the piston that drives the injection and retraction process will not be accidentally operated, thereby allowing the needle to be safely removed from the injection site.

[0113] Mechanisms that can be used to hold the piston steady include magnets that use magnetic force to hold the piston steady when no external force is applied, mechanical locking mechanisms that physically prevent the piston from moving, springs that apply external force to hold the piston in place, and latches that cooperate with notches or fixtures to limit travel.

[0114] The purpose of these mechanisms is to provide further assurance of the device's functionality, ensuring that the needle remains secured between injection and subsequent retraction. This feature is consistent with the overall design of the device, which includes various features to prevent over-pressurization and accidental exposure of the needle, and ensure proper sterility of the fluid chamber.

[0115] In summary, step 116 includes a method and implementation thereof that uses various mechanisms, such as magnets, locking mechanisms, springs, or latches, to keep the piston of a pressurized multi-injection needle device fixed between injection and needle retraction to ensure safety and accuracy of the drug administration process.

[0116] Step 118 provides a safety feature that automatically overrides manual operation once an action within the device is completed. This step focuses on a mechanism within the pressurized multi-injection needle device that ensures that the valve returns to a closed state after an action is completed without requiring continued manual input.

[0117] The mechanism functions by detecting the end of piston travel, such as fully extended or retracted, and actuating the valve to return to its initial position. This automatic reset mechanism maintains the device's pressure within the operating range, exposing the needle only when necessary, thereby reducing the risk of accidental exposure or misdosing.

[0118] This override mechanism can be mechanical, such as using a spring or latch, or electronic, such as using a sensor to send a signal to an actuator to close the valve. The choice of mechanical or electronic system depends on the requirements of the equipment, which is determined by the sterilization, maintenance and environment in which the equipment will be used.

[0119] Essentially, step 118 ensures that the device has a feature that automatically resets the valve to a safe state after use, contributing to the safety and effectiveness of the drug administration process. This step is an integral part of operating the device to ensure its controlled operation during the administration of an injectable substance.

[0120] Step 120 involves providing a component within the device that ensures that once the liquid enters the gas-liquid chamber, it will not flow out of the inlet channel, which is a check valve 15 that only allows the liquid to flow in one direction to prevent backflow. The check valve is a mechanical component located on the liquid side of the piston in the gas-liquid chamber, and its function is to allow the liquid drug to enter while preventing it from flowing back.

[0121] A check valve opens due to the pressure created by the inflowing liquid and closes when the inflow stops or reverses. This is achieved by a movable part within the valve that responds to changes in pressure and flow direction. The design of the check valve can vary depending on the specific requirements of the equipment.

[0122] The check valve is added to maintain the sterility and dosage accuracy of the drug and ensure that the device functions as intended during drug administration. Without this component, the device may have inaccurate injection dosages, which may have serious consequences for the patient.

[0123] In summary, step 120 involves employing a check valve to prevent backflow of liquid medication, ensuring that the device performs as intended during an injection.

[0124] Step 122 involves the process of transferring the liquid drug into the gas-liquid chamber of the pressurized multi-needle injection device, which is achieved by using a peristaltic pump, which is a pump that drives the fluid by squeezing and releasing a flexible body, sucking the liquid into the tube and propelling it forward. The pump is manually operated and can accurately control the volume of liquid introduced into the chamber. The peristaltic pump is selected because the liquid does not need to be in direct contact with the pump, because the fluid flows in the pipeline and can be handled aseptically.

[0125] This step involves a peristaltic pump, liquid drug, flexible body, gas-liquid chamber and operator. The operator starts the pump, and the liquid is transferred from the storage chamber to the chamber. The peristaltic pump can ensure the controlled transfer of the drug, which is necessary to maintain the integrity of the drug and ensure the safety of the injectee.

[0126] The peristaltic pump must be compatible with the liquid used and be able to withstand the pressure generated by the gas within the device. It must also have a good seal to prevent liquid backflow or leakage.

[0127] In summary, step 122 discloses a method for introducing liquid medication into a chamber using a peristaltic pump, ensuring that the medication is transferred in a controlled and safe manner in preparation for a subsequent injection process.

[0128] Step 124 involves setting up a sterilization system within the pressurized multi-needle injection device, wherein a sterilant enters through a check valve and is also used to introduce the drug into the gas-liquid chamber. The sterilant typically includes isopropyl alcohol and distilled water. The purpose of this step is to ensure the sterility of the liquid chamber and the needle by eliminating potential pathogens that may affect the purity of the drug or pose a health risk.

[0129] The components involved in this step include the check valve, fluid chamber, and needle. The disinfectant flows into the fluid chamber and then flushes out of the needle, a process that ensures that the route of administration is not contaminated.

[0130] This step was introduced to comply with safety standards and ensure that the device can be used to administer medications in a sterile environment, such as in a medical or veterinary setting, to address the risks associated with injections and provide a reliable solution for a variety of application scenarios. The sterilization process can be applied to the workflow of medication administration, emphasizing the importance of safety and hygiene in this device.

[0131] Step 126 involves two configurations for use with the device, each of which is tailored for a specific method of drug delivery. The first configuration is an extended handle that is used in situations where a distance between the user and the person being injected is required, such as when administering drugs to certain animals or when additional control is required during surgery. The extended handle acts like a lever to help deliver the drug accurately.

[0132] The second configuration is optimized for close-range drug delivery, which is intended for use in situations where the administrator can safely interact with the patient or animal at close range. It is a more direct approach that may improve drug delivery accuracy and recipient comfort.

[0133] Both configurations are designed with fit and comfort in mind, to minimize fatigue or risk of repetitive strain injuries to the person administering the medication. The design extends the time the device can operate effectively in a variety of scenarios, from medical settings to field conditions.

[0134] As described in step 126, the device can be adapted to different modes of administration to meet different requirements encountered in medical and veterinary practice. By providing these configurations, it is helpful for multi-scenario applications, thereby facilitating the administration of injectable drugs in different scenarios.

[0135] Step 128 focuses on providing a safety mechanism to ensure the integrity of the injection device during operation, primarily involving the Luer lock mechanism, which is a standardized fitting used to securely connect a needle to a syringe or similar device. The Luer lock ensures that the needle remains connected and will not disconnect or leak even when faced with applied pressure during the injection process.

[0136] The safety mechanism locks the needle in place by twisting action, which prevents accidental disconnection and drug leakage due to pressure generated by the gas propellant in the device. The safety mechanism provided by the Luer lock matches the needle so that the needle can safely inject the drug.

[0137] The Luer lock, as part of the device, is a component that interacts with the needle to form a sealed connection, which can adapt to the pressurized environment within the device, allowing the device to inject drugs such as vaccines into muscle tissue as intended. The Luer lock is added in step 128 to ensure that the device operates without compromising the safety or effectiveness of drug injection.

[0138] Step 130 relates to the application scope of the multi-point injection drug administration configuration of the device, covering the veterinary environment as the main environment, and can also be extended to the human medical environment and other injection fields. The device can inject a variety of drugs, not limited to specific types of drugs, such as various vaccines, etc.

[0139] Step 130 is performed by a user operating the device in different situations, for example, a veterinarian may use the device to vaccinate animals, a medical professional may use it for human vaccination or treatment, and the device is used in a research or industrial environment where precise multi-point injections are required.

[0140] The device facilitates its use in these different scenarios, including a gas pressure system that can be refilled with gas from a box or gas tank and several safety features, such as a locking mechanism to prevent over-pressurization and a safety feature that ensures the needle is securely covered when not in use, which are designed to maintain the functionality and safety of the device regardless of the scenario in which the device is used.

[0141] In summary, step 130 describes the versatility of the device, highlighting its use in a range of other injection scenarios beyond its primary application scenario, not limited to any specific drug or vaccine type, emphasizing the strong adaptability of the device and its potential wide range of uses.

[0142] The device's innovative design provides a sophisticated method of drug delivery, which represents a significant advance in the accuracy, safety and effectiveness of intramuscular drug administration. The device has a novel design and has broad potential for use in veterinary and human medicine.

[0143] The device of the present invention also has a mechanism to stop the flow of gas once the operation is completed and ensure that the device is not over-pressurized. In addition, it also includes a method for maintaining the piston in the appropriate position between activation and retraction, a component to prevent discharge from the liquid inlet, and a method for introducing liquid into the chamber.

[0144] The device provides a method of drug delivery that significantly improves the accuracy and safety of intramuscular drug administration. Although the device was originally tailored for certain specific uses, its versatile design is not limited to such uses.

[0145] The present invention provides a method of drug administration, which is achieved by the various technical features and components described above. The method combines a pressure source that provides pressure, equipped with a unique detachable needle, and performs a controlled sequence of drug injections, and the entire process is safe, efficient and aseptic. The method is designed for specific but not exclusive uses and is a major innovation in the field of drug administration, providing broad potential for the future of veterinary and human medicine.

Claims

1. A pressurized multi-injection needle device for booster vaccine injection, characterized in that: The device includes a shell, a handle frame, a drug delivery mechanism, a pneumatic propulsion mechanism, a trigger mechanism and a drug delivery mechanism. The handle frame is fixedly installed together with the shell, the drug delivery mechanism is arranged inside the shell, the drug delivery mechanism and the pneumatic mechanism are respectively installed on the shell and are arranged corresponding to the drug delivery mechanism, and the trigger mechanism is installed on the shell and is connected to the pneumatic mechanism.

2. The pressurized multiple injection needle device for booster vaccine injection according to claim 1, characterized in that: The housing comprises a first housing (1) and a second housing (2). The first housing (1) and the second housing (2) are two left and right half shells. The first housing (1) and the second housing (2) are buckled together to form a housing as a whole.

3. The pressurized multiple injection needle device for booster vaccine injection according to claim 1, characterized in that: The handle frame comprises a first handle frame (23) and a second handle frame (24), the first handle frame (23) and the second handle frame (24) are two left and right halves, the first handle frame (23) and the second handle frame (24) are buckled together to form a handle frame as a whole, and the handle frame is fixedly mounted on the rear end of the housing.

4. The pressurized multiple injection needle device for booster vaccine injection according to claim 1, characterized in that: A trigger slider (3) is installed at the front end of the housing, a rubber pad (33) is installed at the front end of the trigger slider (3), a trigger limit slider (6) is buckled on the trigger slider (3), the trigger limit slider (6) is fixedly installed on the osmotic regulator (5) at the front end position, one or more adjustment holes are opened at corresponding positions on the trigger slider (3), a trigger (7) is fixedly installed at the rear end position of the trigger limit slider (6), and the trigger (7) and the trigger limit slider (6) are fixedly installed together.

5. The pressurized multiple injection needle device for booster vaccine injection according to claim 4, characterized in that: Neodymium iron boron magnets (32) are fixedly mounted at corresponding positions inside the rubber pad (33) and on the outer shell.

6. The pressurized multiple injection needle device for booster vaccine injection according to claim 1, characterized in that: A gas tank adapter frame (38) for mounting a compressed gas tank (37) is fixedly arranged on the shell. The gas tank adapter frame (38) is fixedly mounted on the shell. The gas tank adapter frame (38) is fixedly mounted below the shell and is arranged correspondingly to the bottle adapter (9).

7. The pressurized multiple injection needle device for booster vaccine injection according to claim 1, characterized in that: The drug delivery mechanism comprises a bottle adapter (9), a container (21), a peristaltic pump (16) and a liquid tube (18); the bottle adapter (9) is arranged on the housing; the container (21) is mounted on the bottle adapter (9); the bottle adapter (9) is fixedly mounted above the housing; and the liquid inlet of the peristaltic pump (16) is connected to the bottle adapter (9) through a pipeline.

8. The pressurized multiple injection needle device for booster vaccine injection according to claim 7, characterized in that: The liquid pipe (18) is connected to the medicine liquid inlet of the medicine delivery mechanism through a pagoda connector (14), and a check valve (15) is connected to the liquid pipe (18).

9. The pressurized multiple injection needle device for booster vaccine injection according to claim 1, characterized in that: The pneumatic propulsion mechanism comprises an air tank adapter frame (38), a compressed air tank (37), an air pipe (17), an airflow directional control valve (12) and an airflow control valve (11); an air inlet of the airflow directional control valve (12) is connected to the air tank adapter frame (38) via the air pipe (17); the airflow directional control valve (12) is provided with two air outlets, the two air outlets are respectively connected to an air inlet of a drug delivery mechanism via an air pipe (17); one of the air pipes (17) connected to the air outlet of the airflow directional control valve (12) is connected to the airflow control valve (11); the airflow control valve (11) is fixedly mounted inside the housing via a fixing screw (39); and an adjusting knob of the airflow control valve (11) extends out of the housing.

10. The pressurized multiple injection needle device for booster vaccine injection according to claim 1, characterized in that: The trigger mechanism comprises a trigger (7), an airflow directional control valve (12) and an electric control part. The trigger button of the airflow directional control valve (12) is arranged on a motion track of the trigger (7). The electric control part comprises a relay (31), a control circuit board (26) and a battery (27). The relay (31) and the control circuit board (26) are respectively fixedly mounted in a housing. The battery (27) is fixedly mounted in the housing via a battery rack (19). A battery cover (34) is mounted on the housing at a position corresponding to the battery (27). A battery charging module (22) is mounted on the housing. The battery charging module (22) is connected to the control circuit board (26).

11. The pressurized multiple injection needle device for booster vaccine injection according to claim 10, characterized in that: A display screen (25) is mounted on the control circuit board (26), and the display screen (25) is mounted in the housing via display screen mounting screws (29). A button (35) is mounted on the control circuit board (26).

12. The pressurized multiple injection needle device for booster vaccine injection according to claim 1, characterized in that: The drug delivery mechanism comprises a cylinder (45), an actuating gas rod (44), a first piston (47), a second piston (52), a rubber stopper (54), a front end cover adapter (51) and a needle adapter (53). The cylinder (45) is provided with a front cavity and a rear cavity. The first piston (47) is arranged in the rear cavity, and the second piston (52) is arranged in the front cavity. The first piston (47) and the second piston (52) are fixedly connected together via the actuating gas rod (44). The rubber stopper (54) is fixedly mounted on the second piston (52). A front end cover adapter (51) is fixedly mounted on the front end of the cylinder (45). A second O-ring (59) is arranged between the front end cover adapter (51) and the cylinder (45). A needle adapter (53) is fixedly mounted on the front end cover adapter (51), a small sealing ring (46) is sleeved on the actuating gas rod (44), and the small sealing ring (46) is arranged at the dividing portion between the front cavity and the rear cavity. The front cavity is divided into a liquid cavity and a first gas cavity by the second piston (52), and the rear cavity is the second gas cavity. A large sealing ring (48) is arranged between the second piston (52) and the cylinder (45), and a large sealing ring (48) is arranged between the first piston (47) and the cylinder (45). The liquid pipe (18) is connected to the liquid cavity in the front cavity, the gas pipe (17) with the gas flow control valve (11) is connected to the second gas cavity, and another gas pipe (17) is connected to the first gas cavity.

13. The pressurized multiple injection needle device for booster vaccine injection according to claim 12, characterized in that: A cylinder end cover (49) is installed at the rear end of the cylinder (45), a first O-ring (50) is arranged between the cylinder end cover (49) and the cylinder (45), and a flat head nut (57) is installed on the cylinder (45), and the cylinder end cover (49) is locked by the flat head nut (57).

14. The pressurized multiple injection needle device for booster vaccine injection according to claim 1, characterized in that: The multi-port needle (56) comprises a connector (60), a main liquid tube (61) and one or more liquid dispensing tubes (62); the rear end of the main liquid tube (61) is connected to the connector (60); the one or more liquid dispensing tubes (62) are respectively connected to the front end of the main liquid tube (61) and arranged in a ring; the front end of the liquid dispensing tube (62) is a needle tip, and a front liquid outlet hole (64) is provided at the needle tip.

15. The pressurized multiple injection needle device for booster vaccine injection according to claim 14, characterized in that: The side surface of the liquid dispensing tube (62) is provided with at least one side liquid outlet hole (63).

16. The pressurized multiple injection needle device for booster vaccine injection according to claim 14, characterized in that: The connector (60) is a Luer lock connector.

17. A method for using a pressurized multi-injection needle for booster vaccine injections, characterized by: The method comprises the following operations: Operation 100 provides a device for administering a drug by intramuscular injection; Operation 102 operates a pressure source for supplementing a specific gas; Operation 104 provides a component in the device to prevent the simultaneous opening of two gas flows, the component consisting of two valves, one valve is responsible for starting the system to allow gas to enter a chamber, in which the gas and liquid are separated by a piston with a seal, and the second valve is used to retract the actuator from the chamber, using a piston connected to the same rod as the piston in the gas-liquid chamber to achieve the necessary separation of the rod seal, and the two valves cannot be opened at the same time; Operation 106 is a component of the device, which is safely separated by another component such as a seal, and the operation of the piston is controlled and adjusted to ensure accurate injection of liquid medicine, allowing the pressurized multi-needle injection device to safely and effectively inject a certain dose of medicine by ensuring the separation of gas and liquid; Operation 110 involves a safety feature covering the needle and the first poppet valve activated by contact, including a sleeve or protective cover for protecting the needle when not in use, when the sleeve contacts the patient's skin surface or injection surface, it triggers the opening of the first poppet valve, allowing pressurized gas to enter the gas-liquid chamber of the actuator, and then the gas pressure drives the piston sealed with an O-ring or other type of seal to inject the liquid drug through the dedicated needle; Operation 112 involves providing a safety feature within the pressurized multi-injection needle device, the mechanism automatically cooperating to stop the flow of gas when the pressure within the device reaches a predetermined limit; Operation 114 involves providing a component in the device responsible for quickly releasing gas pressure, and selecting a valve compatible with the gas pressure system when installing; Operation 118 provides a safety feature that automatically overrides manual operation once the action within the device is completed; Operation 120 involves providing a component within the device that ensures that once the liquid enters the gas-liquid chamber, it will not flow out of the inlet channel, and the component only allows the liquid to flow in one direction to prevent reverse flow; Operation 122 involves a process of transferring a liquid drug into a gas-liquid chamber of a pressurized multi-needle injection device by using a peristaltic pump; Operation 126 involves two configurations for use with the device, the first configuration being an extended handle for use in situations where a distance between the user and the person being injected is required, and the second configuration being optimized for close-range drug delivery, which configuration is suitable for use in situations where an administrator can safely interact with a patient or animal at close range; Operation 128 provides a safety mechanism for ensuring the integrity of the injection device during operation, involving a Luer lock mechanism for securely connecting the needle to a syringe or similar device; Operation 130 is the application scope of the multi-point injection drug administration configuration of the device, which covers the veterinary environment, expands to the human medical environment and other injection fields, and the device can inject multiple drugs.

18. The method of using the pressurized multiple injection needle for booster vaccine injection according to claim 17, characterized in that: The operation 100 includes a sub-operation 100-a, which is performed using a pressurized gas source, which is used as a propellant for injectable drugs, and a method for replenishing the gas source uses a sub-operation 100-b box or gas tank.

19. The method of using the pressurized multiple injection needle for booster vaccine injection according to claim 17, characterized in that: The method also includes operation 108 involving a safety feature, which automatically stops the gas supply once the driving action in the device is completed. The mechanism of operation 108 includes a system for detecting the completion of the actuator action. When the driving end point is reached, the system cooperates to stop the gas flow, which is achieved by mechanical methods or performed by electrical methods.

20. The method of using the pressurized multiple injection needle for booster vaccine injection according to claim 17, characterized in that: The method further includes operation 124 involving setting up a sterilization system in the pressurized multi-needle injection device, wherein a sterilant in the system enters through a check valve and is also used to introduce a drug into the gas-liquid chamber, and the sterilant typically includes isopropyl alcohol and distilled water.

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