Catering container cover with ventilation function and sealing structure of catering container cover
By incorporating an internal fitting structure and a ventilation device, the problems of easy leakage and poor sealing effect of ventilation holes in catering packaging are solved, achieving automatic venting and improved sealing effect, ensuring the safety and sealing of catering containers during transportation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-09-20
- Publication Date
- 2026-04-07
AI Technical Summary
Existing food packaging has problems such as easy leakage of vents and poor sealing effect, especially in thin-walled food containers, where it is difficult to achieve both ventilation and sealing.
Design a catering container lid with an interlocking structure, including a lid sealing wall and a container sealing wall, forming an interference fit sealing barrier through a limiting clamping part, and equipped with a venting device to achieve automatic venting and sealing.
It achieves effective sealing of thin-walled catering packaging to prevent liquid leakage, and automatically releases air when internal pressure increases to avoid container deformation, thus improving safety and convenience during use.
Smart Images
Figure CN121799778A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the packaging field, especially the catering packaging field, and in particular to a catering container cover with a ventilation function and a sealing structure thereof. BACKGROUND
[0002] Catering packaging is widely used in people's daily life to provide convenience in various forms, among which fast food boxes and instant drinking cups are the main tableware required for food and beverage packaging and take-out, and are particularly common in daily life. However, the currently sold catering packaging, especially the instant drinking cup and fast food box, generally has two problems, namely, exhaust and sealing. This is because most catering packaging uses a thin-walled structure, which has poor stability, and sealing is difficult. In addition, if the catering product is packaged in a hot state, the package will deform due to the increase in internal pressure, that is, there is an exhaust problem.
[0003] Regarding exhaust, some existing products also have simple air vents, but these air vents are prone to leakage while ventilating. Although some products have a leakage cavity on the cover, the liquid return hole below the leakage cavity is usually designed to be very small, and the liquid remaining in the cavity cannot overcome the surface tension, so it cannot produce a good backflow effect, ultimately resulting in the liquid remaining in the leakage cavity contaminating the entire outer surface of the package. However, if the opening is simply enlarged, the larger opening is more likely to cause a large amount of leakage during transportation when encountering bumps, and these contradictions have not been effectively solved in the existing technical solutions.
[0004] Regarding sealing, some existing catering packaging also has a sealing line, but it is basically distributed on the outer edge of the container or the cover, such a design produces a certain sealing effect, but because it is set on the outer edge, the liquid remaining in the gap between the container and the cover can easily leak out of the package over time, or can also spill out at the moment of opening, thereby causing contamination and poor user experience. On the other hand, sealing requires stable and continuous contact stress, and the existing catering packaging lacks a suitable structure to ensure the contact force between the sealing line and the sealing wall, so it cannot produce a good sealing effect, which is the root cause of the poor sealing effect of the existing design.
[0005] There is currently a lack of a technical solution for a catering container cover suitable for a thin-walled container that has a ventilation function and an ideal sealing effect without being too complex. SUMMARY
[0006] In view of the problems in the prior art, the present application provides a catering container cover with a ventilation function and a sealing structure thereof to solve at least one of the above technical problems.
[0007] To achieve the above objectives, the present invention provides a food container lid with ventilation function and its sealing structure, including a lid top, a lid edge and a container edge; The cover has at least one continuous and complete cover sealing wall that covers the entire circumference of the cover along its edge; A container sealing wall is provided along the edge of the container, with at least one side facing the inside of the container and continuously and completely covering the entire circumference of the container. The container sealing wall extends vertically or inclined downward to form a backflow section along the opening, which extends downward to the inner wall of the container. The lid sealing wall and the container sealing wall cooperate with each other, with the container sealing wall surrounding or partially surrounding the lid sealing wall to form an interlocking structure in which the lid sealing wall is inserted into the container sealing wall. At least one of the container sealing wall or the lid sealing wall is provided with at least one continuous edge sealing part; The edge of the cap is provided with a limiting clamping part, so that the edge sealing part is clamped and attached to the sealing wall of the container or the sealing wall of the cap, forming an interference fit sealing barrier; A ventilation device is provided on the top of the cover.
[0008] This invention achieves effective sealing of thin-walled catering packaging containers, and can also automatically vent gas when gas is generated in the packaging container, causing the internal pressure to rise, thereby avoiding container deformation and effectively preventing liquid leakage, solving the problem of container deformation or soup leakage during the handling or use of catering packaging.
[0009] More preferably, the container sealing wall, the reflux section along the opening, and the container inner wall are a continuous downward or inwardly inclined curved surface.
[0010] More preferably, the limiting clamping part is composed of one or more sets of reinforcing structures distributed on the edge of the cover; the reinforcing structure is a circumferential thickening, or a thickened area distributed at intervals, or a reinforcing rib distributed at intervals, or a combination of the above methods.
[0011] More preferably, the ventilation device includes a lower base, an elastic valve plate, and an upper base; the lower base or the upper base is integrally formed with the top cover, and the other is connected to the top cover. The upper base and the lower base together form a cavity, and the elastic valve plate is provided inside the cavity. The lower base is provided with a lower vent, and the upper base is provided with an upper vent.
[0012] More preferably, the elastic valve plate includes: a fixed edge, an elastic structure, and a sealing valve plate; a venting sealing part is provided on the lower base, upper base, or sealing valve plate; the elastic structure makes the venting sealing part in close contact with the sealing valve plate, upper base, or lower base to form an opening and closing mechanism.
[0013] More preferably, the elastic structure is a spatial spring, with one end connected to the fixed edge and the other end connected to the sealing valve plate.
[0014] Further optionally, the elastic structure is a planar spring, which is composed of spring strips formed in a similar hollowed-out manner. The hollowed-out form can be a straight line, an arc, a curve, or a combination of one or more of the above forms. The length of the spring strip is greater than its width or thickness. The spring strip is provided with a spring strip connecting part, which is connected to the fixed edge on the outside and to the sealing valve plate on the inside.
[0015] Alternatively, the elastic valve plate is made of a thin film, and a thin film fixing structure is provided on the lower or upper substrate, with a gap or notch at the root of the thin film fixing structure.
[0016] More preferably, the size of the film fixing structure is larger than the original size of the film, and the film is stretched and fixed to the film fixing structure with a designed preload; the end face of the lower vent protrudes from the edge of the fixed film, and the fixed film is tightly attached to and covers the end face of the lower vent, forming an opening and closing mechanism. When the film is not lifted by air pressure, the opening and closing mechanism is in the closed state.
[0017] More preferably, a drinking section is provided on the top of the lid near the edge of the lid, the drinking section including a drinking spout and a plug.
[0018] Beneficial effects: The present invention achieves effective sealing of thin-walled catering packaging containers through the aforementioned interlocking structure; it also achieves effective venting and automatic closure of the venting path through the setting of the venting device; by using the technical solution of the present invention, automatic venting can be achieved, which can effectively prevent liquid leakage, thereby effectively solving the problem of catering packaging bulging and deforming or leaking juice due to bumps or overturning during transportation. Attached Figure Description
[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.
[0020] In the attached diagram: Figure 1 This is a cross-sectional view of specific embodiment 1 of the present invention; Figure 2 This is a partially enlarged view of the sealing structure of a specific embodiment 1 of the present invention; Figure 3 This is a partial enlarged view of the ventilation device in specific embodiment 1 of the present invention; Figure 4This is a three-dimensional bird's-eye view of the spatial structure spring in specific embodiment 1 of the present invention; Figure 5 This is a three-dimensional bird's-eye view of a specific embodiment 2 of the present invention; Figure 6 These are the front and top cross-sectional views of the planar structure spring according to specific embodiment 3 of the present invention; Figure 7 These are front and top sectional views of the planar structure spring according to specific embodiment 4 of the present invention; Figure 8 This is a cross-sectional view of specific embodiment 5 of the present invention; Figure 9 This is a partial enlarged view of the ventilation device in specific embodiment 5 of the present invention; Figure 10 This is a cross-sectional view of specific embodiment 6 of the present invention; Figure 11 This is a partial enlarged view of the ventilation device in specific embodiment 6 of the present invention; Wherein: 1 is the top of the lid, 2 is the edge of the lid, 3 is the edge of the container, 5 is the venting device, 6 is the drinking spout, 8 is the plug, 201 is the sealing wall of the lid, 202a is the sealing part a along the spout, 202b is the sealing part b along the spout, 203 is the limiting clamping part, 301 is the sealing wall of the container, 302 is the reflux part along the spout, 303 is the inner wall of the container, 501 is the upper base, 502 is the lower base, 503 is the upper vent, 505 is the sealing valve plate, 506 is the elastic structure or spring strip, 507 is the fixed edge, 508a is the venting sealing part a, 508b is the venting sealing part b, 509 is the lower vent, 510a is the spring strip connecting part a, 510b is the spring strip connecting part b, 515 is the membrane, 516 is the membrane fixing structure notch, 517 is the membrane fixing structure, and 518 is the end face of the lower vent. Implementation
[0021] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other; the described embodiments are only some embodiments of the present invention, and not all embodiments; furthermore, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion.
[0022] The embodiments and features of this application can be applied to various packaging solutions for food products, such as meals, especially when packaging food products containing liquids or requiring hot packaging. Applying this invention can achieve automatic venting while preventing liquid spillage. Similarly, beverages, especially hot beverages, also require venting and leak-proof sealing. Applying any of the embodiments of this application can enable automatic venting of the packaging container while significantly improving its sealing performance, thereby preventing liquid spillage. The embodiments of this application can also be applied to any other foreseeable future scenarios requiring both leak-proof sealing and venting.
[0023] The present invention will now be further described with reference to the accompanying drawings.
[0024] See Figures 1 to 4 Specific embodiment 1: A catering container lid with ventilation function and its sealing structure, including a lid top 1, a lid edge 2, and a container edge 3; a lid sealing wall 201 is provided along the lid edge 2, continuously and completely covering the entire circumference of the lid; a container sealing wall 301 is provided along the container edge 3, facing the inside of the container, continuously and completely covering the entire circumference of the container, the container sealing wall 301 extends vertically or inclined downward to form an effluent return section 302, which extends downward to the inner wall 303 of the container; the lid sealing wall 201 and the container sealing wall 301 cooperate with each other, with the container sealing wall 301 surrounding or partially surrounding the lid sealing wall 201 to form an interlocking structure in which the lid sealing wall 201 is inserted into the container sealing wall 301; At least one of the container sealing wall 301 or the lid sealing wall 201 is provided with at least one continuous edge sealing part 202. In this embodiment, two edge sealing parts 202a and 202b are provided, where 202a is an annular protrusion and 202b is formed by the interference fit between the lid edge corner and the container sealing wall 301. The cap edge 2 is provided with a limiting clamping part 203, so that the edge sealing part 202 is clamped and attached to the container sealing wall surface 301, forming an interference fit sealing barrier; as an alternative design, the edge sealing part can also be provided on the container sealing wall surface, and the limiting clamping part is used to clamp and attach it to the cap sealing wall surface to form an interference fit sealing barrier, which can also achieve the same purpose. See Figure 2 In this embodiment, the limiting clamping part 203 is achieved by thickening the entire circumference of the cover edge. The thickened limiting clamping part has a strong clamping force, which can ensure that there is a sufficiently large contact stress between the sealing part at the edge and the sealing wall of the container or the sealing wall of the cover.
[0025] In this embodiment, a ventilation device 5 is installed on the roof 1; see [link to relevant documentation].Figure 3 The ventilation device 5 includes a lower base 502, an elastic valve plate 505, and an upper base 501. The lower base 502 is integrally formed with the top cover 1, and the upper base 501 is fixedly connected to the top cover 1. Alternatively, as an alternative design, the upper base 501 can be integrally formed with the top cover 1, and the lower base 502 can be fixedly connected to the top cover, achieving the same goal. The upper base 501 and lower base 502 together form a cavity, within which an elastic valve plate is installed. The lower base has a lower vent 509, and the upper base has an upper vent 503. The elastic valve plate includes a fixed edge 507, an elastic... The structure 506 and the sealing valve plate 505 are provided; the lower base 502 is provided with venting sealing parts 508a and 508b; the elastic structure 506 makes the venting sealing part 508a in close contact with the end face of the sealing valve plate 505, and the venting sealing part 508b in close contact with the corner position of the sealing valve plate 505, forming two sealing barriers and constituting an opening and closing mechanism; as an alternative design, the venting sealing part can also be set on the upper base or the sealing valve plate, and under the action of the elastic structure, a sealing barrier with close contact can be formed between the sealing valve plate or the upper base, which can also achieve the same purpose. See Figure 4 The elastic structure in this implementation case is a spatial structure spring.
[0026] In this embodiment, a drinking section is provided at the position of the top of the cover 1 near the edge 2 of the cover. The drinking section includes a drinking spout 6 and a plug 8.
[0027] This embodiment firstly, through the cooperation of the insert-type fitting structure and the limiting clamping part, maintains sufficient contact stress between the sealing part and the sealing wall surface. At the same time, the insert structure allows the liquid remaining between the sealing walls to flow back into the container through the reflux part, instead of leaking outwards, thus achieving effective sealing of the thin-walled container. Secondly, this embodiment achieves automatic opening and closing of the exhaust channel through the setting of the venting device. When pressure accumulates inside the container, the opening and closing mechanism automatically opens to vent, and automatically closes after the pressure is released to prevent leakage. Therefore, using this embodiment, while solving the venting problem of hot products, when the product is bumped or overturned and has a tendency to leak, the sealing structure and venting device of this embodiment can also effectively prevent liquid leakage, thereby avoiding the problem of soup leakage in the catering packaging during transportation.
[0028] See Figure 5Specific embodiment 2, a catering container lid with ventilation function and its sealing structure, is a variation of embodiment 1 above. The limiting clamping part 203 adopts a spaced reinforcing rib structure. Compared with embodiment 1, the structure is more scientific, can save materials, and make the structure lighter.
[0029] See Figure 6 Specific implementation case 3, a catering container lid with ventilation function and its sealing structure, is a variation of implementation case 2 above. The elastic structure is a planar spring, which is composed of spring strips 506 formed in a similar hollow manner. In this case, the hollow form is six arc segments. The length of the spring strips 506 is greater than its width or thickness. The spring strips 506 are provided with spring strip connecting parts 510a and 510b, where 501a connects to the sealing valve plate 505 and 510b connects to the fixed edge 507. See Figure 7 Specific implementation case 4, a catering container lid with ventilation function and its sealing structure, is a variation of implementation case 3 above. The elastic structure is also a planar spring structure. The difference is that the hollow form of this case is a structure similar to "ㄣ" formed by arc segments. The spring strip 506 also has the characteristic that its length is greater than its width or thickness. The spring strip 506 is provided with spring strip connecting parts 510a and 510b, where 501a connects to the sealing valve plate 505 and 510b connects to the fixed edge 507. See Figures 8 to 9 Specific implementation example 5: A catering container lid with ventilation function and its sealing structure. The elastic valve plate is made of a thin film 515. A thin film fixing structure 517 is provided on the lower base 502, and a notch 516 is provided at the root of the thin film fixing structure 517. The upper base 501 and the top cover 1 are integrally formed, and the lower base 502 is connected to the top cover 1 by ultrasonic welding. The size of the thin film fixing structure 517 is larger than the original size of the thin film 515. The thin film 515 is stretched and fixed to the thin film fixing structure 517 with a designed pre-tightening force. The end face 518 of the lower vent 509 protrudes from the surface where the edge of the fixed thin film is located. The fixed thin film 515 is tightly attached to and covers the end face 518 of the lower vent, forming an opening and closing mechanism. When the thin film 515 is not lifted by air pressure, the opening and closing mechanism is in the closed state.
[0030] See Figures 10 to 11Specific implementation case 6, a catering container lid with ventilation function and its sealing structure, is a variation of implementation case 5 above. The lower base 502 and the lid top 1 are integrally formed, the upper base 501 is connected to the lid 1 by ultrasonic welding, the upper base 501 and the drinking part plug 8 are also integrally formed, and are connected into one piece by a connecting piece. This makes the design of the entire lid simpler, more reasonable and convenient to use.
[0031] In summary, the embodiments demonstrate that an internal sealing structure, along with a well-designed sealing edge and limiting clamping part, ensures sufficient pressure between the sealing part and the sealing wall, thus guaranteeing a sealing effect. The addition of a backflow section at the edge reduces the difficulty of sealing, making it easier to achieve a seal. The venting device allows for timely release of internal pressure generated by the hot product, preventing container bulging and deformation while also effectively contributing to the sealing effect; otherwise, sealing a container with internal pressure would be much more difficult. Furthermore, the venting device itself has excellent leak-proof properties, preventing additional leakage risks. This enhances the overall leak-proof effect of the packaging, significantly improving its scientific and rational design. Each of the above embodiments includes or partially includes these features; therefore, by reasonably combining or selectively using or partially using these features, the sealing and venting problems of food packaging can be solved, improving the consumer experience.
[0032] The above are merely optional embodiments of the present invention. It should be noted that those skilled in the art may make several improvements and modifications based on the principles of the present invention without creative effort. All other embodiments obtained thereby should be considered within the scope of protection of the present invention.
Claims
1. A food container lid with ventilation function and its sealing structure, characterized in that: Including the top of the lid, the edge of the lid, and the edge of the container; The cover has at least one continuous and complete cover sealing wall that covers the entire circumference of the cover along its edge; A container sealing wall is provided along the edge of the container, with at least one side facing the inside of the container and continuously and completely covering the entire circumference of the container. The container sealing wall extends vertically or inclined downward to form a backflow section along the opening, which extends downward to the inner wall of the container. The lid sealing wall and the container sealing wall cooperate with each other, with the container sealing wall surrounding or partially surrounding the lid sealing wall to form an interlocking structure in which the lid sealing wall is inserted into the container sealing wall. At least one of the container sealing wall or the lid sealing wall is provided with at least one continuous edge sealing part; The edge of the cap is provided with a limiting clamping part, so that the edge sealing part is clamped and attached to the sealing wall of the container or the sealing wall of the cap, forming an interference fit sealing barrier; A ventilation device is provided on the top of the cover.
2. The catering container lid with ventilation function and its sealing structure according to claim 1, characterized in that: The container sealing wall, the reflux section along the opening, and the container inner wall are all continuous surfaces that are either curved downwards or inclined inwards.
3. The catering container lid with ventilation function and its sealing structure according to claim 1, characterized in that: The limiting clamping part is composed of one or more sets of reinforcing structures distributed on the edge of the cover; the reinforcing structure is a circumferential thickening, or a thickened area distributed at intervals, or a reinforcing rib distributed at intervals, or a combination of the above methods.
4. A catering container lid with ventilation function and its sealing structure according to any one of claims 1-3, characterized in that: The ventilation device includes a lower base, an elastic valve plate, and an upper base; the lower base or the upper base is integrally formed with the top cover, and the other is connected to the top cover. The upper base and the lower base together form a cavity, and the elastic valve plate is provided inside the cavity. The lower base is provided with a lower vent, and the upper base is provided with an upper vent.
5. The catering container lid with ventilation function and its sealing structure according to claim 4, characterized in that: The elastic valve plate includes: a fixed edge, an elastic structure, and a sealing valve plate; a venting sealing part is provided on the lower base, upper base, or sealing valve plate; the elastic structure makes the venting sealing part in close contact with the sealing valve plate, upper base, or lower base to form an opening and closing mechanism.
6. A catering container lid with ventilation function and its sealing structure according to claim 5, characterized in that: The elastic structure is a spatial spring, with one end connected to the fixed edge and the other end connected to the sealing valve plate.
7. A catering container lid with ventilation function and its sealing structure according to claim 5, characterized in that: The elastic structure is a planar spring, which is composed of spring strips formed in a similar hollowed-out manner. The hollowed-out form can be a straight line, an arc, a curve, or a combination of one or more of the above forms. The length of the spring strip is greater than its width or thickness. The spring strip is provided with a spring strip connecting part, which is connected to the fixed edge on the outside and to the sealing valve plate on the inside.
8. A catering container lid with ventilation function and its sealing structure according to claim 4, characterized in that: The elastic valve plate is made of a thin film, and a thin film fixing structure is provided on the lower or upper substrate. The root of the thin film fixing structure is provided with a gap or notch.
9. A catering container lid with ventilation function and its sealing structure according to claim 8, characterized in that: The size of the film fixing structure is larger than the original size of the film. The film is stretched and fixed to the film fixing structure with a designed preload. The end face of the lower vent protrudes from the edge of the fixed film. The fixed film is tightly attached to and covers the end face of the lower vent, forming an opening and closing mechanism. When the film is not lifted by air pressure, the opening and closing mechanism is in the closed state.
10. A catering container lid with ventilation function and its sealing structure according to claim 4, characterized in that: The drinking section is provided near the edge of the lid, and the drinking section includes a drinking spout and a stopper.