Intake valve for container and container comprising same

Abstract

The utility model relates to an air inlet valve (1) for a container and the container, the air inlet valve comprises a support part (2) made of hard materials, the support part is provided with a base (21) and a boss part (22) located above the base, the projection area of the boss part in a projection plane perpendicular to the vertical direction is smaller than that of the base, and the boss part (22) is located above the base. The support part is further provided with an air inlet channel (23) which extends upwards from the base (21) to the interior of the boss part but does not penetrate through the boss part, and at least one through hole (25) communicated with the air inlet channel (23) is formed in the side wall of the boss part (22). And the diaphragm part (3) is made of a flexible material, is provided with a gap part (31) matched with the boss part (22) in shape, and can be arranged on the bracket part (2) in a sleeving manner through the gap part. The air inlet valve and the container can provide a good sealing effect during falling.

Description

Technical Field

[0001] The utility model generally relates to the field of daily necessities, and more specifically relates to an air inlet valve for a container and a container comprising the air inlet valve, wherein the container is especially a feeding bottle for infants. Background Art

[0002] For closed drinking containers such as baby bottles, in order to solve the problem of difficulty in sucking liquid due to the decrease in air pressure inside the container after sucking, an air intake valve device is usually provided between the bottle mouth and the nipple. However, for such an air intake valve, particles in the liquid may block the air intake valve during use, and it is easy to mix air in the milk and cause choking. In addition, the disassembly and cleaning of the air intake valve of such a structure is also relatively troublesome.

[0003] To solve this problem, there is also an air intake valve installed at the bottom of the container. For example, CN115355343A discloses a return valve and a return container. The return valve includes a valve body and an air path formed along the axis of the valve body; the valve body includes a valve lip and a valve body; the valve lip is located above the valve body, the valve lip is a convex platform formed by a diaphragm, and the wall thickness is smaller than the wall thickness of the valve lip; the air path passes through the valve body, and the valve lip is provided with an air gap connected to the air path, and the air gap is closed when the container is under non-negative pressure and opened when the container is under negative pressure. However, in this air intake valve, on the one hand, the entire air intake valve is made of a flexible material such as silica gel and is inserted into the hole at the bottom of the container by plugging, and on the other hand, it has an air gap directly connected to the air path. Therefore, especially when the container falls and is subjected to a large external force impact, the air intake valve is deformed due to the force, which easily causes the liquid inside the container to leak through the gap between the air intake valve and the bottom of the container or through the air gap opened due to deformation. Summary of the invention

[0004] In order to at least partially solve or improve the problems existing in the prior art, the utility model provides an air intake valve for a container and a container including the air intake valve. The air intake valve and the container can avoid the problem of choking milk due to air mixed in the liquid on the one hand, and can also provide good sealing performance when the container falls on the other hand.

[0005] According to a first aspect of the utility model, there is provided an air intake valve for a container, the air intake valve comprising: a support portion made of a hard material, the support portion having a base and a boss portion located above the base, the projection area of ​​the boss portion in a projection plane perpendicular to the vertical direction being smaller than the projection area of ​​the base, wherein the support portion also has an air intake passage extending upward from the base to the interior of the boss portion but not passing through the boss portion, and at least one through hole connected to the air intake passage is provided on the side wall of the boss portion; a diaphragm portion made of a flexible material, the diaphragm portion having a gap portion adapted to the shape of the boss portion and capable of being sleeved on the support portion through the gap portion.

[0006] By designing the air intake valve according to the utility model as a two-piece structure including a bracket part made of a hard material and a diaphragm part made of a flexible material, the sealing performance can be enhanced compared to the air intake valve in the prior art, thereby preventing liquid leakage caused by impact, for example, when the container falls.

[0007] According to some embodiments of the present invention, the hard material is a thermosetting / thermoplastic plastic, such as a polyolefin, especially polypropylene. Preferably, the support portion is integrally formed, especially integrally formed by means of an injection molding process. The hard plastic material can provide good support and deformation resistance.

[0008] According to some embodiments of the present invention, the flexible material is a thermoplastic / thermosetting elastomeric material, such as silicone, latex, silicone or similar elastomeric materials. Preferably, the diaphragm portion is formed in one piece, especially in one piece by means of an injection molding process. The flexible elastomeric material enables the air pressure to break open the diaphragm portion and release a path for air to pass through when there is a pressure difference.

[0009] According to some embodiments of the utility model, a plurality of through holes are provided, and the plurality of through holes are evenly arranged on the side wall of the boss portion along the circumferential direction. More preferably, an even number of through holes are provided, and the even number of through holes are symmetrically arranged relative to the central axis of the boss portion, thereby reducing the processing cost.

[0010] According to some embodiments of the utility model, in the installed state, the wall of the gap portion is closely attached to the boss portion at the portion of the boss portion where the through hole is not provided, and there is a gap between the wall of the gap portion and the boss portion at the portion provided with the through hole. Thus, on the one hand, the seal can be maintained between the bracket portion and the diaphragm portion in a pressure balanced state, and on the other hand, when there is a pressure difference between the inside and outside of the container, the airflow can break open the sealing lip of the diaphragm portion and release a path for air to pass through.

[0011] According to some embodiments of the utility model, the boss portion includes a first section, a second section and a third section from bottom to top, the through hole is arranged on the second section and the first section, the second section and the third section have a circular projection shape in a projection plane perpendicular to the vertical direction. The circular projection shape is conducive to low-cost manufacturing.

[0012] According to some embodiments of the utility model, a first flange portion protruding radially outward is formed on the upper portion of the first section, and the first flange portion has a circular projection shape in a projection plane perpendicular to the vertical direction. The first flange portion is conducive to achieving a better sealing effect by matching the shape of the corresponding part of the diaphragm part.

[0013] According to some embodiments of the present invention, the diameter of the second section is smaller than the diameter of the first flange and smaller than the diameter of the third section. Thus, the second section forms a concave structure between the first section and the third section, which is conducive to the airflow to break open the sealing lip of the diaphragm part when there is a pressure difference, thereby releasing a path for air to pass through.

[0014] According to some embodiments of the utility model, the third section extends from bottom to top in a vertical direction with a gradually increasing diameter, thereby forming a shape similar to an "inverted cone", which is conducive to releasing a path for air to pass through when there is a pressure difference. Preferably, a second flange portion protruding radially outward is formed on the upper part of the third section, and the second flange portion can be used as a "top cover" that can provide a better sealing effect.

[0015] According to some embodiments of the utility model, the gap portion includes a first sub-gap portion, a second sub-gap portion and a third sub-gap portion corresponding to the first section, the second section and the third section respectively, wherein, in the installed state, an annular gap portion is formed between the side wall of the second sub-gap portion and the second section.

[0016] According to some embodiments of the present invention, the diaphragm portion includes a first lower segment, a second middle segment and a third upper segment along the vertical direction, and the first segment, the second segment and the third segment have a circular projection shape in a projection plane perpendicular to the vertical direction.

[0017] According to some embodiments of the utility model, the first section gradually decreases in diameter from bottom to top in the vertical direction and then transitions to the second section. As a result, the bottom surface with a larger diameter can better abut against the base of the bracket part and provide a greater friction force through a larger contact area, so that the diaphragm part can be better fixed on the bracket part in the installed state.

[0018] According to some embodiments of the present invention, an annular undercut is formed between the first section and the second section, and the undercut can facilitate connection with a container.

[0019] According to some embodiments of the present invention, the second section is cylindrical, and the third section is an annular thin-walled structure extending upward from the upper portion of the second section. The annular thin-walled structure forms a valve lip of the intake valve through the elasticity of the material itself and a thin wall thickness, and the valve lip can be opened under the pressure of the gas and thereby release a path for air to pass through.

[0020] According to some embodiments of the present invention, in a projection plane perpendicular to the vertical direction, the diameter of the second flange portion is greater than the diameter of the third section. Thus, the second flange portion used as a "top cover" can better seal the path for air to pass through.

[0021] According to a second aspect of the present invention, a container is provided, comprising an air intake valve according to the present invention.

[0022] According to some embodiments of the utility model, the bottom of the container has an opening, and the air inlet valve is installed on the opening. Preferably, the air inlet valve is installed on the opening by a ring-shaped side recess. This structure provides a simple installation method, and the air inlet valve can be removed from the container as a whole and cleaned.

[0023] According to some embodiments of the utility model, the bottom of the container is threaded, and the air inlet valve is installed on the container through a threaded connection. The threaded connection method can, for example, make the air inlet valve a part of the container, such as the bottom of the container, and this embodiment also provides a convenient installation and disassembly effect.

[0024] The present invention is not limited to the above-mentioned embodiments, but different structures can be used to achieve the following advantages provided by the present invention, namely, through the two-piece structure, not only a better sealing effect is provided, but also air can be easily allowed to enter the container when there is a pressure difference and a pressure compensation effect can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and other features, advantages and aspects of the various embodiments of the present invention will be more clearly understood by referring to the following detailed description in conjunction with the accompanying drawings. In the accompanying drawings, the same or similar reference numerals represent the same or similar elements.

[0026] Figure 1 A schematic diagram of an air intake valve for a container in an assembled state according to an embodiment of the utility model is shown.

[0027] Figure 2 A schematic exploded view of an intake valve according to an embodiment of the present invention is shown.

[0028] Figure 3 A perspective view showing a bracket portion according to an embodiment of the present invention.

[0029] Figure 4 A cross-sectional view of a diaphragm portion according to an embodiment of the present invention is shown.

[0030] Figure 5 A cross-sectional view of an intake valve in an installed state according to an embodiment of the present invention is shown.

[0031] Figure 6 A schematic diagram showing an air intake valve according to an embodiment of the present invention installed in a container. DETAILED DESCRIPTION

[0032] The following is a description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, including various details of the embodiments of the present invention to facilitate understanding, which should be considered as merely exemplary. Therefore, it should be recognized by those of ordinary skill in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the present invention. Similarly, for the sake of clarity and conciseness, the description of well-known functions and structures is omitted in the following description.

[0033] As used herein, the term "including" and its variations mean open inclusion, i.e., "including but not limited to". Unless otherwise stated, the term "or" means "and / or". The term "based on" means "based at least in part on". The terms "an example embodiment" and "an embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment".

[0034] In addition, the terms "first", "second", etc. used in the present disclosure are only used to distinguish various objects for the sake of clarity of description, and do not limit the size, quantity or other order of the objects described. The orientation or position relationship indicated by directional terms is based on the orientation or position relationship shown in the drawings, which is only for the purpose of facilitating the description of the present application, and does not indicate or imply that the objects referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application.

[0035] Figure 1 A schematic diagram showing an air intake valve for a container in an assembled state according to an embodiment of the utility model is shown. Figure 2 A schematic exploded view of an intake valve according to a first embodiment of the present invention is shown.

[0036] like Figure 1 and Figure 2 As shown, the intake valve 1 includes a support part 2, which is made of a hard plastic material such as polyolefin, especially polypropylene, and is formed by means of an injection molding process, so that the support part of a desired shape can be simply manufactured by means of an injection mold of a corresponding shape. In some embodiments, the hard material constituting the support part can be a hard plastic, such as a hard thermosetting / thermoplastic plastic, so as to achieve a good supporting function. Figure 2 It can be further seen below that the bracket part 2 includes a base 21 located at the bottom and a boss portion 22 located above the base, the boss portion is preferably configured to extend upward from the base integrally with the base 21, and the diameter of the boss portion 22 is smaller than the diameter of the base. In this embodiment, the boss portion 22 and the base 21 are configured to be rotationally symmetrical around a common central axis. For example, the base 21 and the boss portion 22 are thus configured to have a circular projection shape on a projection plane perpendicular to the central axis, and the circular shape is conducive to low-cost manufacturing. Of course, in other embodiments, the base 21 and the boss portion 22 can be configured to be any other suitable shape.

[0037] Depend on Figure 2 It can be further seen that the bracket portion 2 includes an air inlet passage 23 extending upward from the lower surface of the base to the inside of the boss portion 22 but not axially penetrating the boss portion (at Figure 2 In other words, the air inlet passage 23 is configured as a blind hole extending vertically upward from the bottom of the bracket portion. At least one, preferably multiple through holes 25 communicating with the air inlet passage 23 are provided on the side wall of the boss portion. In the case where multiple through holes 25 are provided, the multiple through holes are substantially arranged at the same height along the circumferential direction so as to cover the multiple through holes by corresponding parts of the diaphragm portion. In some preferred embodiments, the multiple through holes 25 are evenly arranged on the side wall of the boss portion 22 along the axis, and in particular, an even number of through holes 25 are formed symmetrically relative to the central axis of the boss portion 22 for ease of processing.

[0038] like Figure 2 As shown, the air inlet valve 1 further comprises a diaphragm portion 3, preferably, the diaphragm portion 3 is made of a flexible material, for example, a flexible elastomeric material, thereby facilitating assembly with the container on the one hand, and on the other hand, releasing a path for air to pass through when elastically deformed by force and thereby providing a channel for air to pass through. In the sense of the present application, the flexible elastomeric material can be a material that is softer and elastic than the hard material of the support portion, for example, a thermoplastic / thermosetting elastic material, silicone, latex, silicone or similar elastic material.

[0039] Depend on Figure 2It can be further seen that the diaphragm portion 3 has a gap portion 31 formed inside (at Figure 2 The shape of the gap portion matches that of the boss portion 2, so that in the installed state, the boss portion 22 is received by the gap portion 31 of the diaphragm portion 3 and the wall of the gap portion 31 is tightly against the boss portion 22 at the portion where the through hole 25 is not provided, so as to maintain a seal between the bracket portion 2 and the diaphragm portion 3 in a pressure balanced state. At the portion where the through hole 25 is provided, a certain gap is left between the gap portion 31 and the corresponding portion of the boss portion 22, so that the airflow can flush the sealing lip or valve lip of the diaphragm portion when there is a pressure difference between the inside and outside of the container, as will be described in detail later.

[0040] Figure 3 FIG. 2 shows a perspective view of a bracket part 2 according to an embodiment of the present invention. Figure 3 It can be seen that the boss portion 21 of the bracket portion includes three parts, namely, a first section 211, a second section 212 and a third section 213. The first section 211 is configured to be a columnar shape, preferably a cylindrical shape, extending upward from the upper surface of the base 21. Preferably, a first flange portion 2110 having a larger diameter than the remaining portion is configured at the upper portion of the first section 211. The first flange portion is conducive to achieving a better sealing effect by matching the shape of the corresponding portion of the diaphragm portion 3. Of course, the first flange portion 2110 may also be omitted.

[0041] Depend on Figure 3 It can be seen that a second section 212 is formed extending upward from the upper surface of the first section 211 or the first flange portion 2110, and the diameter of the second section is smaller than the diameter of the first section. Figure 2 and Figure 3 It can be clearly seen that the at least one through hole 25 is arranged on the second section 212, that is, the boss portion 2 can realize air circulation through the through hole 25 arranged on the second section 212 thereof and the air inlet channel 23 connected to the through hole 25. A third section 213 is formed above the second section, and the third section is preferably formed into an inverted cone shape with a diameter gradually increasing from bottom to top, and the diameter of the bottom surface of the third section 213 is larger than the diameter of the top surface of the second section 212, thereby, the second section 212 forms a concave structure between the first section 211 and the third section 213, and the concave structure is conducive to the flow of gas when the diaphragm is flushed due to the pressure difference, which will be explained later. In addition, configuring the third section 213 into an inverted cone shape with a diameter gradually increasing upward is also conducive to the flow of gas when the diaphragm is flushed by the pressure difference.

[0042] Depend on Figure 3It can be further seen that a second flange portion 2130 having a larger diameter than the remaining portion is formed on the upper portion of the third section of the bracket portion 2 according to this embodiment. The second flange portion 2130 can be used as a "top cover" here, and the diaphragm portion 3 is covered by the top cover in the installed state, thereby achieving better sealing in the pressure balanced state.

[0043] Figure 4 FIG. 2 shows a cross-sectional view of a diaphragm portion according to an embodiment of the present invention. Figure 4 Combination Figure 3 It can be seen that the shape of the internal gap portion 31 of the diaphragm portion 3 matches the shape of the boss portion 21, so that the boss portion 21 is tightly received in the gap portion 31 in the installed state. In this preferred embodiment, corresponding to the first section 211, the second section 212 and the third section 213 of the boss portion 21, the gap portion 31 also includes a first sub-gap portion 311, a second sub-gap portion 312 and a third sub-gap portion 313. In some embodiments, a first flange portion 2110 having a larger diameter than the remaining portion is formed on the upper portion of the first section 211, and correspondingly, a fourth sub-gap portion 3110 matching the shape of the first flange portion 2110 is also formed on the upper portion of the first sub-gap portion 311. The shape matching of the first flange portion 2110 and the fourth gap portion 3110 is conducive to tightly fixing the diaphragm portion 3 on the bracket portion 2 and thus achieving a better sealing effect.

[0044] In addition, Figure 4 It can be seen that the upper end of the second gap portion 312 of the gap portion 31 has the same diameter as the lower end of the third gap portion 313. Therefore, when the second gap portion 312 receives the second section 212 provided with the through hole 25, there is an annular gap between the second section and the second section. Figure 5 Just as described.

[0045] Figure 5 FIG. 2 shows a cross-sectional view of an intake valve in an installed state according to an embodiment of the present utility model. Figure 5 It can be seen that, as described above, in the installed state, a certain gap is left between the side wall of the second sub-gap portion 312 corresponding to the second segment 212 having the through hole 25 and the second segment 212, for example Figure 5 The annular gap 11 visible in the figure is provided so that when there is a small pressure difference, such as the pressure difference caused by the sucking of a baby, the air flow can break open the sealing lip or valve lip of the diaphragm part.

[0046] Depend on Figure 4 and Figure 5 It can be further seen that the diaphragm portion 3 can also be divided into three parts along the vertical direction, namely, a first section 321 at the bottom, a second section 322 in the middle and a third section 323 at the top. Figure 5 In the embodiment shown in , the first section 321 roughly corresponds to the first section 211 of the bracket portion 2 excluding the first flange portion 2110 in the vertical direction, the second section 322 roughly corresponds to the second section 212 of the bracket portion 2 together with the first flange portion 2110, and the third portion roughly corresponds to the third section 213 of the bracket portion 2 excluding the second flange portion 2130.

[0047] In a preferred embodiment, the first section 321 of the diaphragm part 3 is configured to gradually decrease in diameter in the cross section and transition to the second section 322, so that its bottom surface with a larger diameter can better abut against the bottom surface 21 of the bracket part and provide a greater friction force through a larger contact area, so that the diaphragm part can be better fixed on the bracket part in the installed state. A side recess 324 is preferably provided between the first section 321 and the second section 322, and the side recess 324 helps to fix the intake valve 1 on the container by plugging.

[0048] In this embodiment, the second section 322 is configured as a cylindrical shape with uniform diameter, the third section 323 is configured as an annular thin-walled structure extending upward from the upper part of the second section, and the diameter of the third section 323 is smaller than the diameter of the second section 322. The upper end of the third section 323 is covered by the second flange portion 2130 and abuts against the second flange portion, that is, the diameter of the third section 323 is configured to be slightly smaller than the second flange portion 2130, thereby ensuring good gas sealing inside the intake valve in a pressure balanced state. The third section of the thin-walled structure itself constitutes a sealing lip or valve lip of the diaphragm part, which can be opened by the airflow when there is a pressure difference to release a path for air to pass through.

[0049] Figure 6 FIG. 1 is a schematic diagram showing an air intake valve according to an embodiment of the present invention installed in a container. Figure 6 It can be seen that the container 4 is in the shape of a common baby feeding bottle, with an opening 41 at the bottom of the container, and the air inlet valve 1 is installed on the opening 41 of the container 4 by plugging, and the side recess 324 described above is form-locked and snap-fitted on the container wall defining the opening 41. Of course, the air inlet valve 1 is not limited to being installed on the container 4 by snap-fitting, for example, it is also conceivable to connect the air inlet valve to the container 4 by threaded connection, for example, the bottom surface of the bracket part 2 is configured as a container bottom cover with threads, and the container bottom cover is installed on the container body also provided with threads by threaded connection. In this case, the bracket part 2 and the container body are preferably made of the same material.

[0050] The working principle of the intake valve 1 according to the utility model is briefly described below. Figure 5In the installed state, the diaphragm part 3 is closely attached to the bracket part 2. At this time, air can flow upward through the air inlet channel 23 at the bottom of the bracket 2 through at least one through hole 25 connected to the air inlet channel 23 to the annular gap part 11 formed between the side wall of the second sub-gap part 312 and the second section 212 of the bracket part. In the pressure balanced state, since the third section 323 of the diaphragm part 3 is closely attached to the third section 213 of the bracket part 2, air cannot enter the interior of the container. When the pressure inside the container is lower than the external pressure, for example, in the event of sucking, the pressure difference between the inside and outside of the container, that is, the pressure difference between the air inlet passage 23 of the air inlet valve and the inside of the container, will cause the pressure to break open the thin-walled third section 323 of the diaphragm part 3 made of a flexible elastomeric material, thereby releasing an annular gap for air to pass through between the third section 323 and the third section 213 of the bracket part 2, so that the air outside the container can enter the interior of the container and reach a pressure equilibrium state again. At this time, the third section 323 will restore its original shape due to its elasticity and fit tightly against the third section 213 again, preventing air from passing through.

[0051] The utility model has been described through the above-mentioned embodiments, but it should be understood that the above-mentioned embodiments are only for the purpose of example and description, and are not intended to limit the present disclosure to the scope of the described embodiments. It should be understood by those skilled in the art that more variations and modifications can be made according to the teachings of the present disclosure, and these variations and modifications all fall within the protection scope of the present disclosure. It should be noted that the features or feature combinations according to the present disclosure described above and the features and feature combinations mentioned in the drawings and / or only shown in the drawings can be used not only in the corresponding given combinations, but also in other combinations or alone, without departing from the scope of the present disclosure.

Claims

1. An air inlet valve (1) for a container, characterized in that: The intake valve comprises: A support portion (2) made of a hard material, the support portion comprising a base (21) and a boss portion (22) located above the base, the projection area of ​​the boss portion in a projection plane perpendicular to the vertical direction being smaller than the projection area of ​​the base, wherein the support portion further comprises an air intake passage (23) extending upward from the base (21) to the interior of the boss portion but not penetrating the boss portion, and at least one through hole (25) communicating with the air intake passage (23) is provided on a side wall of the boss portion (22); A diaphragm part (3) made of a flexible material has a gap part (31) adapted to the shape of the boss part (22) and can be sleeved on the bracket part (2) through the gap part.

2. The intake valve according to claim 1, characterized in that: The hard material is a thermosetting / thermoplastic plastic and the support part (2) is formed in one piece.

3. The air intake valve according to claim 1 or 2, characterized in that: The flexible material is a thermoplastic / thermosetting elastomeric material and the membrane portion (3) is formed in one piece.

4. The air intake valve according to claim 1 or 2, characterized in that: A plurality of through holes (25) are provided, and the plurality of through holes (25) are evenly arranged on the side wall of the boss portion (22) along the circumferential direction.

5. The air intake valve according to claim 1 or 2, characterized in that: In the installed state, the wall of the gap portion (31) is tightly attached to the boss portion (22) at a portion of the boss portion (22) where the through hole (25) is not provided, while at a portion where the through hole (25) is provided, a gap exists between the wall of the gap portion (31) and the boss portion (22).

6. The air intake valve according to claim 1 or 2, characterized in that: The boss portion (22) comprises, from bottom to top, a first section (211), a second section (212) and a third section (213), the through hole (25) is arranged on the second section and the first section, the second section and the third section have a circular projection shape in a projection plane perpendicular to the vertical direction.

7. The air intake valve according to claim 6, characterized in that: A first flange portion (2110) protruding radially outward is formed on the upper portion of the first section, and the first flange portion has a circular projection shape in a projection plane perpendicular to the vertical direction.

8. The air intake valve according to claim 7, characterized in that: The diameter of the second section (212) is smaller than the diameter of the first flange portion (2110) and smaller than the diameter of the third section (213).

9. The air intake valve according to claim 8, characterized in that: The third section (213) extends from bottom to top in a vertical direction with a gradually increasing diameter, and a second flange portion (2130) protruding radially outward is formed at the upper portion of the third section (213).

10. The air intake valve according to claim 9, characterized in that The gap portion (31) includes a first sub-gap portion (311), a second sub-gap portion (312) and a third sub-gap portion (313) corresponding to the first section (211), the second section (212) and the third section (213), respectively, wherein, in the installed state, an annular gap portion (11) is formed between the side wall of the second sub-gap portion and the second section.

11. The air intake valve according to claim 10, characterized in that: The diaphragm portion (3) includes a first lower segment (321), a second middle segment (322) and a third upper segment (323) along the vertical direction, and the first segment, the second segment and the third segment have a circular projection shape in a projection plane perpendicular to the vertical direction.

12. The air intake valve according to claim 11, characterized in that: The first section (321) transitions to the second section (322) with a diameter gradually decreasing from bottom to top along the vertical direction.

13. The air intake valve according to claim 12, characterized in that: An annular undercut (324) is formed between the first section (321) and the second section (322).

14. The air intake valve according to claim 13, characterized in that: The second section (322) is configured in a cylindrical shape, and the third section (323) is configured in an annular thin-walled structure extending upward from an upper portion of the second section.

15. The air intake valve according to claim 14, characterized in that In a projection plane perpendicular to the vertical direction, the diameter of the second flange portion (2130) is greater than the diameter of the third section (323).

16. A container (4), characterized in that The container comprises an air inlet valve (1) according to any one of claims 1 to 15.

17. The container according to claim 16, characterized in that The bottom of the container (4) is provided with an opening (41), and the air inlet valve (1) is mounted on the opening (41).

18. The container according to claim 17, characterized in that The intake valve (1) is mounted on the opening (41) in a form-fitting manner via an annular undercut (324).

19. The container according to claim 16, characterized in that The bottom of the container (4) is configured with threads, and the air inlet valve (1) is mounted on the container via a threaded connection.

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