Auxiliary column and nasal cavity administration device

Abstract

The utility model discloses a nasal administration atomization device and an auxiliary column structure thereof, and aims to simplify the device structure, improve the sealing performance and reduce the production cost. The auxiliary column comprises a sealing part, a sealing transition section and a reset part, integrated design is adopted, a cavity column is arranged in the sealing transition section to enhance rigidity, and a conical part is arranged at the joint of the reset part and the sealing transition section to achieve high-precision assembly and improve the sealing effect. A diversion port and a diversion groove are formed in the top end of the reset part and used for optimizing a liquid flowing path and ensuring that liquid medicine flows smoothly and is evenly atomized. According to the whole structure, by reducing the number of parts and optimizing elastic reset and fluid sealing functions, efficient atomization and reliable sealing of the device are achieved, the production cost is remarkably reduced, and the device is suitable for the field of nasal cavity medicine delivery.

Description

Technical Field

[0001] This utility model belongs to the field of nasal spray drug delivery technology, specifically relating to a secondary column and nasal delivery device. Background Technology

[0002] Currently, the medication delivery device used for nasal administration is usually a spray pump structure. The liquid medication is drawn into the internal channel of the spray pump by pressing the nozzle, and finally sprayed out from the nozzle at the top of the spray pump. In order to facilitate the use of medication by patients, portable medicine bottles are generally used, and patients compress the liquid themselves to form a spray and introduce it into the nasal cavity.

[0003] In the prior art, the spray pump has a normally closed nozzle structure, which is equipped with a vertically movable auxiliary column and a spring acting on the auxiliary column at the nozzle. The auxiliary column and the spring work together to act as a one-way valve.

[0004] The device has the following problems: it requires a separate spring to work with the auxiliary column, resulting in many parts and complex assembly; in addition, the spring needs to be manufactured separately. In order to reduce production and assembly costs, this needs to be improved. Utility Model Content

[0005] The purpose of this utility model is to provide a secondary column, which includes a sealing part, a sealing transition section, and a reset part connected in sequence. The secondary column is an integral structure. The reset part has an internal cavity for cooperating with a piston, and the thin wall of the reset part is used for elastic deformation for reset. The sealing part is used to cooperate with a one-way valve assembly.

[0006] The technical solution provided in this application also has the following technical features:

[0007] Preferably, in one embodiment of this application, one end of the reset part is open, and the other end of the reset part is connected to a sealed transition section;

[0008] The sealing part is used to seal the valve port of the one-way valve assembly.

[0009] Preferably, in one embodiment of this application, a transition section is provided between the sealing part and the sealing transition section for sealing.

[0010] Preferably, in one embodiment of this application, the auxiliary column is used to cooperate with piston I, liquid output assembly, and main column. The sealing part is inserted into the main column and abuts against the outlet of the liquid output assembly. The interior of the reset part cooperates with piston I and is used for liquid to flow along the side wall surface of piston I and reset part through the inner side wall of piston I.

[0011] Preferably, in one embodiment of this application, the top wall of the reset part is provided with a guide port and a guide groove.

[0012] Preferably, in one embodiment of this application, a cavity column is provided inside the sealing transition section.

[0013] Preferably, in one embodiment of this application, a tapered portion is provided at the junction of the reset portion and the sealing transition section to cooperate with the main column.

[0014] A nasal delivery nebulizer, employing the aforementioned secondary column, includes a piston assembly and a spray pump assembly, the piston assembly and the spray pump assembly being used to draw in and atomize the drug;

[0015] The piston assembly includes piston I, piston II, and piston III; the spray pump assembly includes a main column, a secondary column, a press cap, a reset assembly I, a drug delivery pressurization device, a sealing cap, a sealing gasket, and a container;

[0016] In the initial stage of the piston assembly, a compression or expansion stroke allows gas from chamber I to enter chamber II. In the next corresponding stroke, chamber II is under negative pressure, allowing liquid or gas-liquid mixture in chamber II to enter and fill chamber I. The continuous compression or expansion stroke following the initial stage of the piston assembly atomizes the liquid or gas-liquid mixture in chamber I through the nozzle. The continuous compression or expansion stroke following the initial stage of the piston assembly unlocks the one-way valve assembly. A one-way valve assembly is installed before the nozzle. During the continuous compression or expansion stroke following the initial stage of the piston assembly, the liquid or gas-liquid mixture in chamber I opens the one-way valve assembly.

[0017] Reset component I is used to cooperate with the piston assembly for reset; a secondary column is provided on the outlet side of the liquid output component, and the reset part of the secondary column is used to cooperate with the check valve assembly for reset.

[0018] The beneficial effects of this application are as follows:

[0019] 1. This application provides a spray nozzle protection structure with a normally closed nozzle, which can effectively block air pollution from the inside of the spray nozzle of the liquid output component when not in use; and is equipped with a protective cover to protect the liquid output component and prevent dust, and the inside of the protective cover is provided with a protrusion to fit and seal the spray nozzle, so as to fit and seal from the outside of the spray nozzle of the liquid output component.

[0020] 2. This application uses a sub-column with an integrated reset structure, which eliminates the need for elastic pads or springs, and features reduced parts, convenient assembly, and integrated precision;

[0021] The separate spring component was eliminated, and an integrated design of the sub-column and elastic structure was adopted to reduce the number of components;

[0022] No separate spring installation is required, simplifying the assembly process, reducing the risk of installation errors, and improving production efficiency;

[0023] By using an integrated injection molding process to form the sub-pillar and its elastic structure, high coaxiality and stability of the structure can be guaranteed during assembly; production process complexity can be reduced and production efficiency improved; the consistency and reliability of the device can be enhanced, and assembly and debugging steps can be reduced.

[0024] 3. This application eliminates the material and manufacturing costs of individual springs through the integrated sub-column structure; traditional springs usually require separate procurement, processing and assembly, while integrated elastic components can be completed in a single mold or processing step; effectively reducing production consumables and procurement links, lowering overall costs; simplifying supply chain management, and improving production economy. Attached Figure Description

[0025] Figure 1 This is a perspective view of a secondary column according to the present invention;

[0026] Figure 2 This is a front view of a secondary column according to the present invention;

[0027] Figure 3 This is a top view of a secondary column according to the present invention;

[0028] Figure 4 for Figure 2 A sectional view of AA;

[0029] Figure 5 for Figure 3 A cross-sectional view of BB;

[0030] Figure 6 This is a bottom view of a secondary column according to the present invention;

[0031] Figure 7 This is a cross-sectional view of a nasal drug delivery nebulizer according to the present invention;

[0032] Figure 8 This is a schematic diagram showing the normally closed nozzle of a nasal drug delivery atomizing device of this utility model in its open state.

[0033] Figure 9 This is a schematic diagram showing the normally closed nozzle of a nasal drug delivery nebulizer according to the present invention in its closed state; components in the diagram:

[0034] 10. Container

[0035] 20. Sealing cap

[0036] 30. Drug delivery pressurization device

[0037] 40. Liquid output assembly

[0038] 50. Piston I

[0039] 60. Piston II

[0040] 70. Piston III

[0041] 90. Main Column

[0042] 110. Secondary pillar

[0043] 130. Valve outlet channel

[0044] 140. Press the cap

[0045] 150. Gas-liquid filtration assembly

[0046] 160. Reset Component I

[0047] 170. Liquid extraction assembly

[0048] 180. Protective shield

[0049] 190. Sealing gasket

[0050] 1101. Sealing part

[0051] 1102. Reset Part

[0052] 1103. Sealed transition section

[0053] 11021, Flow Guide Channel

[0054] 11022, Conical part

[0055] 11023, Drainage Port

[0056] 11031, Hollow column. Detailed Implementation

[0057] The specific embodiments of this application will be further described in detail below with reference to the accompanying drawings. These embodiments are only for illustrating this application and are not intended to limit the scope of this utility model.

[0058] In the description of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0059] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0060] Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0061] like Figure 1-6 A secondary column, 110, includes a sealing part 1101, a sealing transition section 1103, and a reset part 1102 connected in sequence. The secondary column 110 is an integral structure. The reset part 1102 has an internal cavity for cooperating with a piston, and the thin wall of the reset part 1102 is used for elastic deformation for reset. The sealing part 1101 is used to cooperate with a one-way valve assembly.

[0062] When this application is implemented, its implementation has the following characteristics:

[0063] 1. The design of the integrated elastic component of the sub-pillar can be flexibly selected through geometric shapes, such as wall thickness, curvature, elastic grooves, and material selection, such as medical-grade plastics or elastomers; the integrated elastic component can be adapted to different pressing strokes and reset force requirements by adjusting the thickness or shape.

[0064] It meets the functional requirements of various products, improves the versatility and adaptability of the device, and provides more optimized flexibility for specific nasal drug delivery dosage and frequency of use requirements.

[0065] 2. Reduced material consumption and costs: Lighter weight due to shared thin-walled structure. Integrated elastic components typically use lightweight materials, such as polymers or composites, which are lighter than traditional metal springs; More portable: Reduced overall device weight makes the product easier to carry.

[0066] Improve user comfort and reduce fatigue from prolonged use; encourage users to carry the medication with them to improve medication adherence;

[0067] 3. Extended service life, reducing maintenance requirements

[0068] Reduced wear: Integrated elastic components eliminate the friction issues between traditional springs and peripheral parts, avoiding performance degradation due to metal fatigue or wear;

[0069] High corrosion resistance: The use of highly chemical-resistant materials, such as thermoplastic elastomers or medical-grade silicone, can avoid corrosion caused by long-term contact with liquid medicine or humid environments.

[0070] Extend product lifespan and reduce maintenance needs due to component failure; improve product reliability and user satisfaction;

[0071] 4. Improve sealing performance and optimize liquid protection

[0072] Reduced component connection points: The integrated design reduces the gap between the spring and the seal, reducing the risk of leakage or liquid evaporation.

[0073] The integrated elastic element of the sub-column can be integrated with the sealing element to improve the sealing performance of the nasal nebulizer and avoid drug contamination;

[0074] Ensure accurate dosage of the sprayed medication and maintain stable efficacy; improve the sealing reliability of the nasal delivery device under various usage environments;

[0075] 5. Eliminate potential hazards caused by metal spring components or non-metal springs.

[0076] Metal-free materials: The integrated elastic component avoids the use of metal springs, eliminating the risk of fatigue fracture of metal parts under high-frequency pressure; it has better biocompatibility and is suitable for medical applications.

[0077] Improve the safety of the device, making it especially suitable for long-term use of medical equipment; meet stringent medical device regulatory standards and broaden its application scope;

[0078] Specifically, in one embodiment of this application, one end of the reset part 1102 is open, and the other end of the reset part 1102 is connected to the sealing transition section 1103;

[0079] The sealing part 1101 is used to seal the valve port of the one-way valve assembly; a transition section is provided between the sealing part 1101 and the sealing transition section 1103 for sealing.

[0080] One end of the reset part 1102 is designed as an open structure, allowing it to cooperate with piston I to form a fluid channel and achieve elastic deformation reset function. The open end design not only reduces material usage but also improves the elastic response capability of the reset part, reducing the error risk caused by the assembly of multiple parts. The other end of the reset part 1102 is integrally connected to the sealing transition section 1103, achieving a natural connection of the structure through mold injection molding. The sealing transition section plays a transition and support role, and its tapered design and other features ensure precise cooperation with the main column, further enhancing sealing and stability. The sealing part 1101, through high-precision fitting with the valve port of the one-way valve assembly, effectively blocks air and contaminants from entering the device when it is stationary. Under pressure, it unlocks the valve port as the auxiliary column moves, ensuring smooth spraying and efficient atomization of the liquid. The overall structure reduces the number of independent parts, achieving integrated reset and sealing functions, improving assembly convenience and accuracy, while reducing production costs and complexity. The device maintains reliable sealing while possessing excellent reset capability and fluid control effect, thereby achieving the technical effects of reducing pollution risk, increasing service life, and improving atomization efficiency.

[0081] Specifically, in one embodiment of this application, the secondary column 110 is used to cooperate with the piston I 50, the liquid output assembly 40, and the main column 90. The sealing part 1101 is inserted into the main column 90 and abuts against the outlet of the liquid output assembly 40. The interior of the reset part 1102 cooperates with the piston I 50 and is used for liquid to flow along the side wall surface of the piston I 50 and the reset part 1102 through the inner side wall of the piston I 50. The top wall of the reset part 1102 is provided with a guide port 11023 and a guide groove 11021.

[0082] The auxiliary column 110, through its integrated design, precisely matches the piston I 50, the liquid output assembly 40, and the main column 90 to achieve multi-functional collaboration. The sealing part 1101 is inserted into the main column 90 and tightly contacts the outlet of the liquid output assembly 40, forming a reliable sealing structure to prevent liquid leakage or intrusion of external contaminants. The internal design of the reset part 1102 forms a tight fit with the inner wall of the piston I 50. Utilizing the elastic deformation characteristics of the reset part, it provides an automatic reset function for the device, while ensuring that the liquid can flow along the side wall between the piston I 50 and the reset part 1102. To further optimize the liquid flow path, the top wall of the reset part 1102 is specially provided with a guide port 11023 and a guide groove 11021. By rationally guiding the liquid flow direction and distribution, it reduces liquid flow resistance and improves the uniformity and atomization effect of the liquid spray. The overall design, through the integrated auxiliary column structure, simplifies component connections, improves sealing performance and fluid flow efficiency, reduces production and assembly costs, and enhances the service life of the device and the stability of drug release, thereby achieving the technical effects of reliable sealing, efficient reset, and precise atomization.

[0083] Specifically, in one embodiment of this application, a cavity column 11031 is provided inside the sealing transition section 1103; a tapered part 11022 is provided at the junction of the reset part 1102 and the sealing transition section 1103 to cooperate with the main column 90;

[0084] The sealing transition section 1103 has an internal cavity column 11031, which enhances the overall rigidity and structural stability of the sealing transition section and provides support for the design of the fluid path, helping the liquid maintain stable flow when passing through the secondary column. The connection between the reset section 1102 and the sealing transition section 1103 is designed with a conical section 11022. This conical structure fits precisely with the main column 90, further strengthening the connection stability between the secondary column and the main column and achieving a smooth transition of the fluid path. The transition design of the conical section not only improves the overall airtightness and liquid sealing effect of the device, but also effectively reduces the risk of fluid resistance or leakage that may be caused by improper assembly of parts. The entire structure provides stable support through the combination of the sealing transition section and the cavity column, while the conical connection of the reset section optimizes the assembly accuracy and reset performance of the device, thereby achieving efficient sealing and fluid transmission effects and meeting the technical requirements of precision spraying and reliable sealing.

[0085] like Figure 7 A nasal drug delivery nebulizer, employing the aforementioned secondary column 110, includes a piston assembly and a spray pump assembly, the piston assembly and the spray pump assembly being used to draw in and atomize the drug;

[0086] The piston assembly includes piston I 50, piston II 60, and piston III 70; the spray pump assembly includes main column 90, secondary column 110, pressing cover 140, reset assembly I 160, drug delivery pressurization device 30, sealing cover 20, sealing gasket 190, and container 10.

[0087] In the initial stage of the piston assembly, a compression or expansion stroke allows gas from chamber I to enter chamber II. In the next corresponding stroke, chamber II is under negative pressure, allowing liquid or gas-liquid mixture in chamber II to enter and fill chamber I. The continuous compression or expansion stroke following the initial stage of the piston assembly atomizes the liquid or gas-liquid mixture in chamber I through the nozzle. The continuous compression or expansion stroke following the initial stage of the piston assembly unlocks the one-way valve assembly. A one-way valve assembly is installed before the nozzle. During the continuous compression or expansion stroke following the initial stage of the piston assembly, the liquid or gas-liquid mixture in chamber I opens the one-way valve assembly.

[0088] The reset assembly I 160 is used to cooperate with the piston assembly for reset; the outlet side of the liquid output assembly 40 is provided with a secondary column 110, and the reset part 1102 of the secondary column 110 is used to cooperate with the check valve assembly for reset.

[0089] like Figure 7Its working principle and functions are as follows:

[0090] The liquid medication is atomized and administered through the nasal cavity, allowing the medication to reach the respiratory tract and lungs.

[0091] Normally closed nozzle: The liquid can be sprayed out from the nozzle, but air cannot enter the pump from the nozzle.

[0092] After being filtered, air is supplied to the pressure bottle to keep the gas inside the pressure bottle in a dust-free and sterile state, preventing the medicine from being contaminated.

[0093] The piston assembly includes piston I 50, piston II 60, and piston III 70; the spray pump assembly includes main column 90, secondary column 110, pressing cover 140, reset assembly I 160, drug delivery pressurization device 30, sealing cover 20, sealing gasket 190, and container 10.

[0094] Protective cover 180: protects the liquid output component 40 and prevents dust; the part of the protective cover 180 that comes into contact with the liquid output component 40 is provided with an antibacterial coating; the antibacterial coating is a metal film, which is a silver plating layer, such as nano silver.

[0095] Main column 90: The main column 90 is fixed on the liquid output component 40. The liquid passes through the cyclone channel of the main column 90 and is mechanically stirred under pressure.

[0096] Sub-column 110: Fixed to piston I50, forming a passage with main column 90. Through the elastic force of reset part 1102, the head, main column 90, and liquid output assembly 40 are in contact, forming a closed passage, preventing gas from entering. When the liquid pressure in the chamber of liquid output assembly 40 exceeds the reset force of reset part 1102, reset part 1102 compresses and deforms, opening sub-column 110, and liquid is ejected from liquid output assembly 40. After the liquid is ejected and pressure is released, reset part 1102 springs back, sealing the liquid outlet of the head.

[0097] Piston I 50: Fixed inside the liquid output assembly 40, it works with the reset part 1102, and its lower end works with piston II 60 to form a liquid outlet channel.

[0098] Piston II 60: Fixed on piston I 50, and cooperates with piston I 50, piston III 70 and drug delivery pressurization device 30 to form a sealed liquid outlet channel.

[0099] Piston III 70: Fixed on piston I 50 and piston II 60. When the press cap 140 and liquid output assembly 40 are pressed down, the lower end of piston III 70 and the drug delivery pressurization device 30 begin to seal, forming a closed chamber.

[0100] Reset component I160: A functional component that can reset the part after it is pressed all the way down and then released.

[0101] The dosing pressurization device 30 serves both as a base to fix the various components and as a key component for controlling the dosage.

[0102] Sealing gasket 190: A sealing component that works with container 10 and dosing pressurization device 30 to prevent leakage of the drug solution.

[0103] Sealing cap 20: Anti-opening component, which works with container 10 and sealing gasket 190 to prevent the medicine from being exposed.

[0104] Container 10: Contains the medicinal liquid.

[0105] The reset part 1102 is integrally provided with the sub-column 110, and resets the sub-column 110 to create a seal after the liquid is ejected.

[0106] Liquid output assembly 40: Head base component, externally in contact with the user, internally fixing piston I 50 and main column 90 and forming a liquid outlet channel.

[0107] Press-down cover 140: Fixed to the liquid output assembly 40, it is an extension of the liquid output assembly 40. The hand presses on this part.

[0108] The gas-liquid filtration assembly 150 includes a filter sleeve, a filter membrane, and a filter membrane inner core; the filter sleeve is fixed inside the drug delivery pressurization device 30 and is used to hold the filter membrane; the filter membrane is used to filter bacteria in the gas and only allows air to pass through, not liquid; the filter membrane inner core prevents the filter membrane from falling out and is interference-fitted with the filter membrane sleeve.

[0109] Liquid extraction component 170: draws liquid from container 10, connects the inside and outside of container 10, and serves as a channel for gas and liquid transport.

[0110] like Figure 8 , Figure 9 The normally closed nozzle is achieved; the auxiliary column 110 functions similarly to a one-way valve; when the spray pump is not in use, under the elastic force of the auxiliary column 110, the auxiliary column 110 is in close contact with the liquid output component 40, preventing the liquid from flowing out and preventing external air from entering the drug delivery pressurization device 30; when the spray pump is pressed, the liquid pressure acts on the auxiliary column 110, causing the thin wall of the auxiliary column 110 to be compressed and the auxiliary column 110 to move downward, opening the liquid outlet channel. After one spray is completed, the auxiliary column 110 quickly closes the nozzle under the action of the reset elastic force.

[0111] In summary, this invention aims to address the problems of complex assembly, insufficient sealing performance, and high production costs caused by the multi-component design of existing nasal drug delivery devices. By proposing a sub-column design with an integrated reset and sealing structure, the invention simplifies the device structure and optimizes its function. This invention enhances structural rigidity by incorporating a hollow column within the sealing transition section, improves assembly accuracy and sealing performance by designing a tapered section at the junction of the reset section and the sealing transition section, and optimizes the fluid transmission path through a rational flow guiding structure design. This not only improves the sealing effect and reset performance but also significantly reduces production costs, enhances device reliability and drug atomization effect, thereby meeting the requirements for efficient, stable, and low-cost use.

[0112] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A sub-column, characterized by: The auxiliary column (110) comprises a sealing part (1101), a sealing transition section (1103) and a reset part (1102) connected in sequence, and is an integral structure; the reset part (1102) is provided with an internal cavity, the cavity is used for matching the piston, and the thin wall of the reset part (1102) is used for elastic deformation and reset; the sealing part (1101) is used for matching the one-way valve assembly.

2. A sub-column according to claim 1, wherein, One end of the reset part (1102) is open, and the other end of the reset part (1102) is connected with the sealing transition section (1103). The sealing part (1101) is used for sealing the valve port of the one-way valve assembly.

3. A sub-column according to claim 1, wherein, A transition section is arranged between the sealing part (1101) and the sealing transition section (1103) and is used for sealing.

4. A sub-column according to claim 1, wherein, The auxiliary column (110) is used for matching the piston I (50), the liquid output assembly (40) and the main column (90), the sealing part (1101) is inserted into the main column (90) and abuts against the outlet of the liquid output assembly (40), the internal part of the reset part (1102) matches the piston I (50), and the liquid flows along the side wall surface of the piston I (50) and the reset part (1102) through the inner side wall of the piston I (50).

5. A sub-column according to claim 1, wherein, The top end wall of the reset part (1102) is provided with a flow guide port (11023) and a flow guide groove (11021).

6. A sub-column according to claim 1, wherein, The internal part of the sealing transition section (1103) is provided with a cavity column (11031).

7. A sub-column according to claim 1, wherein, A tapered part (11022) is arranged at the joint of the reset part (1102) and the sealing transition section (1103) and is used for matching the main column (90).

8. A nasal administration aerosol device using a sub-column according to any one of claims 1 to 7, characterized in that, The piston assembly and the spray pump assembly are used for sucking medicine and atomizing.

9. A nasal aerosol device for administration according to claim 8, wherein The piston assembly comprises a piston I (50), a piston II (60) and a piston III (70), and the spray pump assembly comprises a main column (90), an auxiliary column (110), a pressing cover (140), a reset assembly I (160), a medicine delivery booster (30), a sealing cover (20), a sealing gasket (190) and a container (10). The reset assembly I (160) is used for resetting the piston assembly; the outlet side of the liquid output assembly (40) is provided with the auxiliary column (110), and the reset part (1102) of the auxiliary column (110) is used for resetting the one-way valve assembly.

10. A nasal aerosol device for administering a medicament according to claim 8, wherein, One compression stroke or expansion stroke of the initial section of the piston assembly makes the gas in the cavity I enter the cavity II, and another corresponding stroke makes the liquid or gas-liquid mixture in the cavity II enter and fill the cavity I; the continuous compression stroke or expansion stroke after the initial section of the piston assembly makes the liquid or gas-liquid mixture in the cavity I atomize through the nozzle; the continuous compression stroke or expansion stroke after the initial section of the piston assembly makes the liquid or gas-liquid mixture in the cavity I unlock the one-way valve assembly, and the one-way valve assembly is arranged in front of the nozzle, and the liquid or gas-liquid mixture in the cavity I opens the one-way valve assembly in the continuous compression stroke or expansion stroke after the initial section of the piston assembly.

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