A check valve and container

Abstract

This invention provides a check valve and a container, including a plug body with a through-hole in the middle. The plug body includes a first section and a second section, the diameter of the second section being smaller than that of the first section. A vent pipe is provided on the side of the second section away from the first section, and a through hole is provided on the vent pipe that passes through both the first and second sections. By adopting a segmented variable diameter plug body structure and utilizing the stepped structure of the first section with a large diameter and the second section with a small diameter, the plug body and the bottle cap can be precisely positioned and installed, resulting in stronger stability after assembly and making it less prone to displacement or detachment.

Description

Technical Field

[0001] This invention relates to the field of daily necessities, and more particularly to a check valve and a container. Background Technology

[0002] Currently, most portable pet water bottles on the market use an inverted dispensing structure, relying on pets to lick the spout to obtain water. Due to their portability, hygiene, and suitability for both outdoor and indoor use, they are widely used for daily pet drinking. However, this type of inverted water bottle has significant technical flaws in actual use: when the bottle is inverted, water continuously flows out and is drunk by the pet, causing the air volume in the sealed space inside the bottle to increase, resulting in a decrease in air pressure and creating a negative pressure environment. As this negative pressure accumulates, it continuously hinders the flow of water to the spout, directly causing the water flow rate to gradually decrease and the dispensing speed to slow down. This not only fails to meet the pet's continuous and smooth drinking needs but also leads to problems such as dispensing jams and interruptions, significantly reducing the pet's drinking experience and affecting the normal function of the water bottle.

[0003] To address the negative pressure-induced water blockage issue in inverted pet water bottles, existing technologies have introduced relevant improvements, such as the rear-fill pet water bottle disclosed in patent CN309248669S. This innovative design utilizes a rear-opening structure, allowing direct communication between the bottle's interior and the outside atmosphere by opening the rear cap. This effectively eliminates negative pressure within the bottle, completely resolving technical issues such as reduced or slowed water flow and flow interruption caused by negative pressure. To a certain extent, this optimizes the water flow performance of inverted water bottles.

[0004] However, this rear-opening water bottle still has significant drawbacks and technical defects in practical applications, restricting the user experience and hygiene safety. Firstly, to maintain pressure balance inside and outside the bottle and ensure normal water dispensing, the rear cap must remain open for extended periods. This constant exposure of the bottle opening to outside air allows dust, bacteria, insects, and other impurities to easily enter and contaminate the water. Pets drinking contaminated water over a long period are prone to gastrointestinal upset, skin inflammation, and other health problems, posing a serious hygiene and safety hazard. Secondly, the rear cap is an independent, detachable structure. During daily use and when carrying it, there is no dedicated storage structure after removal, making it prone to loss or misplacement. A lost cap not only fails to seal the bottle opening, causing secondary water contamination and leakage, but also leads to overall structural failure, significantly reducing the product's lifespan and usability. Third, prolonged use with the lid open will cause the water inside the bottle to evaporate quickly, become dusty and deteriorate. This is especially true in high-temperature and dusty outdoor environments, where water loss and pollution are more prominent, making it unsuitable for the diverse drinking water needs of pets.

[0005] In summary, current pet water bottle technologies either suffer from negative pressure obstruction and poor water flow, or, even after addressing the negative pressure issue, suffer from drawbacks such as easy water contamination, easy cap loss, and poor practicality. The industry lacks a pet water bottle structure that can simultaneously eliminate negative pressure, protect water hygiene, and prevent accessory loss. Therefore, there is an urgent need to optimize and improve existing technologies to address these technical pain points.

[0006] Therefore, given the current state of the existing technology, developing a check valve and container is an urgent problem to be solved. Summary of the Invention

[0007] To overcome the shortcomings of the prior art, the present invention provides a check valve and a container.

[0008] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a check valve and a container, including a plug body, wherein a through connecting hole is provided in the middle of the plug body, the plug body includes a first section and a second section, the diameter of the second section is smaller than that of the first section, and a vent pipe is provided on the side of the second section away from the first section, wherein a through hole is provided on the vent pipe that passes through both the first section and the second section.

[0009] Furthermore, the first segment has a bottom groove on the side away from the second segment.

[0010] Furthermore, the connecting hole of the plug body is interference-fitted with the water outlet pipe. This interference-fit assembly eliminates the need for additional glue, clips, or other auxiliary fixing structures, achieving a seamless and tight fit. On one hand, it completely eliminates assembly gaps, preventing water leakage and solving the problems of leakage and spillage at traditional structural connections. On the other hand, it significantly improves the overall structural integrity, preventing the water outlet pipe from loosening or falling off, enhancing the overall structural stability and service life of the product, while simplifying the assembly process and reducing production costs.

[0011] Furthermore, the system includes a bottle body and a check valve. The bottle body has a cap at its opening, and the cap has a second through-hole through which a water outlet pipe passes. Inside the cap is a plug with a connection hole for the water outlet pipe. This integrated design eliminates the problem of missing parts: the check valve and venting structure are all built-in and integrated inside the cap, eliminating the need for external, detachable venting components. This completely solves the core drawback of existing technologies where the rear-mounted cap is difficult to store and easily lost after removal. It fundamentally avoids problems such as unsealed bottle openings, secondary water pollution, water leakage, and product structural failure caused by a lost cap, significantly improving the product's practicality and durability.

[0012] Compact structure, suitable for multiple scenarios: The overall structure is simple and compact, retaining the core advantages of portable water bottles being small and easy to carry, while also taking into account the needs of use in all scenarios such as home, outdoors, and travel. The addition of ventilation and anti-fouling structures will not increase the product size or affect portability.

[0013] The assembly logic is reasonable and the functions are highly interconnected: the bottle cap has a reserved through hole through which two water supply pipes pass, and the stopper is built into the bottle cap and connected to the water supply pipe, realizing the integrated linkage of water supply, air supply and sealing functions. While water is being supplied, the air pressure is automatically balanced, eliminating the need for manual operation and greatly improving ease of use.

[0014] Furthermore, the outer wall of the stopper is press-fitted with the bottle cap, and the vent tube is connected to the duckbill valve.

[0015] Furthermore, the vent tube is connected to the long tube, one end of which is provided with a retaining ring. The retaining ring has a rubber head on the side away from the long tube, and one end of the rubber head has a cone. The long tube extends to allow air inlet, avoiding water blockage. The connection between the long tube and the vent tube extends to the air inlet position, preventing water from directly blocking the vent when the water level in the bottle is high. This ensures that air can be normally introduced to balance the air pressure regardless of the amount of water in the bottle, and eliminates the problem of poor water flow at high water levels.

[0016] The retaining ring at the end of the long tube can limit the axial movement and prevent the long tube and rubber head from falling off the vent tube during use, shaking, or inversion, thus ensuring the integrity of the overall ventilation structure.

[0017] The rubber head and cone structure enhances dust and dirt protection: the cone optimizes air intake and ventilation, allowing air to enter more smoothly; the rubber head has elastic sealing properties, and when not in use, it can fit and block the air inlet to the greatest extent, preventing dust, moisture, and impurities from entering, further improving the hygiene and safety of the water in the bottle and reducing the probability of water deterioration.

[0018] Furthermore, a gap is provided between the water outlet pipe and the bottle cap, and multiple spheres are provided inside the water outlet pipe. The gap between the water outlet pipe and the bottle cap provides an auxiliary channel for air circulation. In conjunction with the check valve ventilation structure, it accelerates the balance of air pressure inside and outside the bottle, further improves the smoothness of water flow, and eliminates the problem of water flow obstruction caused by slight negative pressure residue.

[0019] The multi-spherical structure inside the tube forms a choking-proof, splash-proof, and water-controlling protective mechanism. When pets lick and drink, the spheres float slightly with the water flow, adapting to the pet's drinking rhythm and preventing the pet from choking due to excessively fast water flow. At the same time, when not in use, the spheres can block the water outlet channel to prevent water leakage or dripping from the bottle, and can also block external impurities from entering the bottle from the water outlet, ensuring both safety and hygiene.

[0020] Furthermore, the water pipe includes a pipe body and a pipe head.

[0021] Furthermore, one side of the pipe head is provided with a bent edge, and a sealing ring is provided inside the pipe head. The bent edge design can: on the one hand, realize the limiting and fixing of the pipe head, prevent the water outlet pipe from slipping or shifting, and improve the assembly stability; on the other hand, the bent edge can optimize the shape of the water outlet end, adapt to the angle of the pet's mouth when licking, improve the pet's drinking comfort, and at the same time avoid sharp edges from scratching the pet's mouth, thus improving the safety of use.

[0022] Built-in sealing ring: Completely seals the gaps in the pipe fittings, eliminating water leakage at the outlet. It also further prevents external bacteria and dust from entering the bottle through the gaps at the outlet, providing multiple layers of protection to ensure water hygiene and making it perfectly suitable for long-term outdoor and home use.

[0023] As can be seen from the above technical solutions, the present invention has the following advantages: 1. The present invention provides a check valve, including a plug body with a through connection hole in the middle position. The plug body includes a first section and a second section, the diameter of the second section being smaller than that of the first section. A vent pipe is provided on the side of the second section away from the first section. The vent pipe has a through hole that passes through both the first and second sections. By adopting a segmented variable diameter plug body structure and utilizing the stepped structure of the first section with a large diameter and the second section with a small diameter, the plug body and the bottle cap can be precisely positioned and installed, resulting in stronger stability after assembly and making it less prone to displacement and detachment. 2. In this invention, the first segment has a bottom groove on the side away from the second segment, and the connecting hole extends from the bottom groove, thus ensuring that when the first segment is tightly fitted with the bottle cap, there is a reserved space at the contact position between the bottom groove and the bottle cap. The first segment contacts the bottom of the bottle cap, and the bottle cap has a second through hole through which a water outlet pipe passes. There is a gap between the water outlet pipe and the bottle cap. During use, the bottle is filled with water, and when the pet drinks water, the water flows out from the water outlet pipe. The pressure inside the bottle is less than the pressure outside the bottle. Then, under the action of atmospheric pressure, the air outside the bottle first enters the bottom groove through the gap, and then enters the bottle through the connecting hole on the bottom groove, thereby maintaining the balance between the pressure inside and outside the bottle. This can realize automatic communication between the air pressure inside and outside the bottle, eliminating the need for manual opening of the cap for ventilation. It fundamentally replaces the traditional rear-opening venting structure and completely avoids the problems of water pollution and bottle cap loss caused by long-term opening of the cap. Attached Figure Description

[0024] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the plug body in a specific embodiment of the present invention.

[0026] Figure 2 This is a schematic diagram of the plug and the long tube in a specific embodiment of the present invention.

[0027] Figure 3 This is a schematic diagram of the container structure in a specific embodiment of the present invention.

[0028] Figure 4 for Figure 3 A cross-sectional view along the AA direction.

[0029] Figure 5 for Figure 4 Enlarged view of part of the image.

[0030] Figure 6 This is a schematic diagram of the duckbill valve structure in a specific embodiment of the present invention.

[0031] Figure 7 This is a front view of the duckbill valve in a specific embodiment of the present invention.

[0032] Figure 8 for Figure 7 Cross-sectional view along the BB direction.

[0033] Figure 9 This is a picture of the actual object.

[0034] Figure 10 This is a component diagram in a physical object drawing.

[0035] In the diagram, 1-stopper; 2-vent pipe; 3-long pipe; 4-retaining ring; 5-rubber head; 6-cone; 7-through hole one; 8-bottom groove; 9-connecting hole; 10-duckbill valve; 11-bottle body; 12-water outlet pipe; 13-sphere; 14-through hole two; 15-bottle cap; 16-bent edge; 17-pipe head; 18-pipe body; 19-sealing ring; 20-first section; 21-second section. Detailed Implementation

[0036] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0037] like Figure 1 and 4As shown, the present invention provides a check valve, including a plug body 1, with a through connection hole 9 in the middle of the plug body 1. The plug body 1 includes a first section 20 and a second section 21, the diameter of the second section 21 being smaller than that of the first section 20. A vent pipe 2 is provided on the side of the second section 21 away from the first section 20. The vent pipe 2 is provided with a through hole 7 that passes through both the first section 20 and the second section 21. By adopting a segmented variable diameter plug body structure and utilizing the stepped structure of the first section with a large diameter and the second section with a small diameter, the plug body and the bottle cap 15 can be precisely positioned and installed, resulting in stronger stability after assembly and making it less prone to displacement and detachment. Through the combination of the segmented plug body design and the integrated vent pipe 2 and through hole 7, the negative pressure problem of traditional inverted drinking bottles is solved from the root, while avoiding the opening drawbacks of existing rear-opening drinking bottles.

[0038] Fully automatic elimination of negative pressure inside the bottle ensures continuous and smooth water flow: The stopper features a through-hole that allows for controlled communication between the bottle's interior and the outside atmosphere. When a pet drinks, water flows out, causing a decrease in internal air pressure and creating negative pressure. Outside air automatically enters the bottle through the vent tube and through-hole, balancing the pressure inside and outside the bottle. This completely eliminates problems such as reduced water flow, slower speed, jamming, and interruption of flow caused by accumulated negative pressure, ensuring smooth drinking for the pet throughout the process, meeting continuous drinking needs, and significantly improving the drinking experience.

[0039] The closed-loop ventilation design eliminates water pollution and evaporation issues: Unlike existing technologies that require constant opening for ventilation, this design achieves pressure balance without opening any cap, maintaining a completely sealed bottle. This effectively prevents external dust, bacteria, insects, and other impurities from entering the bottle and contaminating the water, eliminating health risks such as gastrointestinal discomfort and skin inflammation for pets drinking contaminated water. It also completely solves the problems of rapid water evaporation and contamination caused by prolonged opening, making it particularly suitable for complex outdoor usage scenarios involving high temperatures and dust.

[0040] The segmented stopper structure improves assembly adaptability: the stopper is divided into a first segment with a larger diameter and a second segment with a smaller diameter. The stepped structure can accurately match the internal assembly space of the bottle cap, realize positioning installation, avoid check valve assembly misalignment and loosening, ensure the overall structural stability, and lay the foundation for the stable performance of subsequent sealing and ventilation functions.

[0041] like Figure 1As shown, the first segment 20 has a bottom groove 8 on the side away from the second segment 21. The connecting hole 9 extends from the bottom groove 8, thus ensuring that when the first segment 20 is tightly fitted with the bottle cap 15, there is a reserved space at the contact position between the bottom groove 8 and the bottle cap 15. The first segment 20 contacts the bottom of the bottle cap 15. The bottle cap 15 has a second through hole 14, through which a water outlet pipe 12 passes. There is a gap between the water outlet pipe 12 and the bottle cap 15. During use, the bottle is filled with water, and water flows out from the water outlet pipe 12 when the pet drinks. The pressure inside the bottle is less than the pressure outside the bottle. Under atmospheric pressure, outside air first enters the bottom groove 8 through the gap, and then enters the bottle through the connecting hole 9 on the bottom groove 8. This maintains the balance between the pressure inside and outside the bottle, enabling automatic communication between the air pressure inside and outside the bottle. No manual opening of the cap is required for ventilation, thus fundamentally replacing the traditional rear-opening ventilation structure and completely avoiding water pollution and cap loss caused by long-term opening. The bottom groove optimizes the airflow path, making the process of outside air entering the bottle smoother and without airflow obstruction, further enhancing the negative pressure elimination effect. At the same time, it can avoid minor risks of water backflow and leakage, and help improve the bottle's sealing performance.

[0042] like Figure 2-8 As shown, the connecting hole 9 of the plug body 1 is interference-fitted with the water outlet pipe 12, and the plug body 1 is made of plastic.

[0043] like Figure 2-8 As shown, it includes a bottle body 11 and a check valve. The bottle body 11 can be in various shapes such as cylindrical, star-shaped, or animal-shaped. The bottle body 11 has a bottle cap 15 at the opening. A plug 1 is placed inside the bottle cap 15. The plug 1 has a connection hole 9 for connecting to the water outlet pipe.

[0044] like Figure 2-8 As shown, the outer wall of the stopper 1 is press-fitted with the bottle cap 15, and the vent pipe 2 is connected to the duckbill valve 10. By setting the duckbill valve 10, water is prevented from flowing out of the bottle through the through hole 7. When there is water in the bottle, the water pressure squeezes both sides of the duckbill valve 10 to prevent water from entering from the valve nozzle. The duckbill valve 10 adopts the existing plastic duckbill valve.

[0045] like Figure 2-8 As shown, the vent tube 2 is sleeved with the long tube 3. One end of the long tube 3 is provided with a retaining ring 4. The retaining ring 4 is provided with a rubber head 5 on the side away from the long tube 3. Preferably, one end of the rubber head 5 is provided with a cone 6. The top of the cone 6 is provided with a gap. The length of the long tube 3 is greater than half the length of the bottle body 11. When the bottle body 11 is filled with water and inverted, the water level should be lower than the position of the retaining ring 4 to ensure that the cone 6 is not immersed in water and there is no water pressure to squeeze the cone 6, so that air from outside the bottle can enter more easily.

[0046] like Figure 5As shown, the water outlet pipe 12 is provided with multiple spheres 13 inside. By setting multiple spheres 13, water will not flow out of the water outlet pipe 12 when the bottle is inverted.

[0047] like Figure 5 As shown, the water pipe 12 includes a pipe body 18 and a pipe head 17, which can be connected by threads or by nesting.

[0048] like Figure 2-8 As shown, the tube head 17 has a bent edge 16 on one side, and the tube body 18 has a bent edge on the side away from the tube head 17. The outer diameter of the sphere is smaller than the inner diameter of the tube head 17 and the tube body 18. By setting the bent edge on the tube head 17 and the tube body 18, the sphere 13 is prevented from detaching from the tube body 18 and the tube head 17. The tube head 17 has a sealing ring 19 inside. By setting the sealing ring 19, the water in the bottle can be better prevented from flowing out when it is inverted.

[0049] In this embodiment, the stopper body is integrally injection molded from food-grade silicone, possessing excellent elasticity, sealing performance, and water resistance. The first section has an outer diameter of 24-28mm and a thickness of 4-5mm, serving as a limiting installation section that interferes with the bottle cap. The second section has an outer diameter of 18-22mm and a thickness of 6-10mm, forming a stepped structure for easy snap-fit ​​fixing inside the bottle mouth. The connecting hole at the center of the stopper body is a circular through hole with a diameter of 8-9mm. The bottom end of the second section integrally extends into a cylindrical vent tube with an outer diameter of 2-3mm and a length of 6-7mm. The through hole inside the vent tube has a diameter of 2mm and vertically penetrates the vent tube, the second section, and the first section, forming a complete air pressure conduction channel, enabling unidirectional air introduction into the bottle and balancing the negative pressure inside the bottle.

[0050] like Figure 9-10 Photos of internally developed products.

[0051] The terms “upper,” “lower,” “outer,” “inner,” etc. (if present) in the specification, claims, and accompanying drawings of this invention are used to distinguish relative positional relationships and are not necessarily qualitative. It should be understood that such data can be interchanged where appropriate so that embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover non-exclusive inclusion.

[0052] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A check valve, characterized in that, The device includes a plug body (1), which has a through connection hole (9) in the middle. The plug body (1) includes a first section (20) and a second section (21). The diameter of the second section (21) is smaller than that of the first section (20). The second section (21) has a vent pipe (2) on the side away from the first section (20). The vent pipe (2) has a through hole (7) that passes through both the first section (20) and the second section (21).

2. The check valve as described in claim 1, characterized in that, The first segment (20) has a bottom groove (8) on the side away from the second segment (21).

3. The check valve as described in claim 1, characterized in that, The connecting hole (9) of the plug (1) is interference-fitted with the water outlet pipe (12).

4. A container, characterized in that, The device includes a bottle body (11) and a check valve according to any one of claims 1-3. The bottle body (11) has a bottle cap (15) at its opening. The bottle cap (15) has a through hole (14) through which a water outlet pipe (12) passes. The bottle cap (15) has a plug (1) inside, and the plug (1) has a connection hole (9) for connecting to the water outlet pipe.

5. The container as described in claim 4, characterized in that, The outer wall of the stopper (1) is press-fitted with the bottle cap (15), and the vent pipe (2) is connected to the duckbill valve (10).

6. The container as claimed in claim 4, characterized in that, The ventilation tube (2) is sleeved with the long tube (3). One end of the long tube (3) is provided with a retaining ring (4). The retaining ring (4) is provided with a rubber head (5) on the side away from the long tube (3). One end of the rubber head (5) is provided with a cone (6).

7. The container as claimed in claim 4, characterized in that, A gap is provided between the water outlet pipe (12) and the bottle cap (15), and multiple spheres (13) are provided inside the water outlet pipe (12).

8. The container as claimed in claim 7, characterized in that, The water pipe (12) includes a pipe body (18) and a pipe head (17).

9. The container as claimed in claim 8, characterized in that, The pipe head (17) has a bent edge (16) on one side and a sealing ring (19) inside the pipe head (17).

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