A breathable leakproof packing cover

Abstract

This invention provides a breathable and leak-proof packaging lid, belonging to the field of packaging container technology. It solves the technical problems of complex structure and complex manufacturing processes in existing packaging lids. This breathable and leak-proof packaging lid has an exhaust slit on its body, with the width D of the slit ranging from 0.1μm to 100μm. By creating an exhaust slit with a width of 0.1μm-100μm on the lid body, this invention utilizes the principle of liquid surface tension to allow gas to flow smoothly through the slit, while liquid cannot leak through due to surface tension. This effectively solves the problem of increased pressure and liquid leakage when holding hot drinks or foods with broth. The structure itself is extremely simple, and the laser-penetrating processing method makes the manufacturing process simple and the production cost low.

Description

Technical Field

[0001] This utility model belongs to the field of packaging container technology, specifically referring to a breathable and leak-proof packaging cover. Background Technology

[0002] With the fast pace of life and the increasing volume of food delivery orders, consumers are placing higher demands on the quality and portability of tableware. When serving hot beverages or food with broth, the lid needs to be able to release steam generated inside the container while preventing leakage of beverages or broth from the vent.

[0003] For example, the utility model application with application number 202221092559.8 discloses a buffer-type leak-proof packaging box lid, which includes a lid sealed to a box body. The lid includes a first protrusion and a second protrusion protruding along the upper surface of the lid. The second protrusion is located inside the first protrusion, and a buffer groove is formed between the first and second protrusions. A first vent hole is provided on the buffer groove. A sealing patch is sealed between the second and first protrusions, covering the buffer groove. The sealing patch has a second vent hole. This buffer-type leak-proof packaging box lid allows hot air inside the box to escape through the first and second vent holes, preventing the box body from deforming due to heat. Soup that overflows due to shaking or condensation generated by the hot air collects in the buffer groove and flows back into the box body, preventing soup and condensation from overflowing. However, the structure of the vent hole in the above-mentioned buffer-type leak-proof packaging box lid is relatively complex, increasing the production process and production cost.

[0004] For example, utility model application No. 202010464391.8 discloses a free-flowing direct-drinking cup lid, including a lid panel, a lid hinge edge, a lid surround, and a stopper assembly. The lid panel includes a horizontally arranged first panel and a second panel extending upwardly from one side of the first panel. The lid surround extends upwardly from the inner side of the lid hinge edge and includes a first surround surrounding the first panel and a second surround surrounding the second panel. The second surround and the second panel form an upwardly protruding drinking spout, and the second panel of the drinking spout is cut to form a drinking opening. This free-flowing direct-drinking cup lid achieves sealing through a fully sealed structure, but it cannot vent gas. It can only hold room temperature or cold drinks. When holding hot drinks, the hot steam generated inside the cup will force the lid open, causing it to detach from the cup body and resulting in beverage leakage. If venting is required, an additional vent hole must be drilled, increasing the production process, and the vent hole also poses a risk of leakage.

[0005] In summary, how to provide a breathable and leak-proof packaging cap with a simple structure, simple production process, and low production cost has become an urgent technical problem to be solved. Utility Model Content

[0006] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a packaging cap that is breathable and leak-proof, with a simple structure, simple production process, and low production cost.

[0007] The objective of this utility model can be achieved through the following technical solutions:

[0008] A breathable and leak-proof packing cover includes a cover body, characterized in that: the cover body is provided with an exhaust vent, the width D of which ranges from 0.1μm to 100μm.

[0009] This packaging cover uses laser penetration to directly punch out a specific shape according to requirements. Therefore, there will be a 0.1μm-100μm wide venting gap at the cut position. This venting gap is only permeable to air and not water. The above-mentioned laser penetration production method has a simple process and low production cost.

[0010] This packaging lid features venting slits with a width of 0.1μm-100μm on the lid body. Utilizing the principle of liquid surface tension, it allows gases (such as water vapor from hot drinks or gas from carbonated beverages) to escape smoothly through the venting slits, while liquids (soup, beverages, etc.) cannot leak through the venting slits due to surface tension. This effectively solves the problem of increased pressure and liquid leakage when holding hot drinks or food with broth. The structure itself is extremely simple and requires no complex additional components.

[0011] In the aforementioned breathable and leak-proof packing cover, the venting gap is U-shaped, C-shaped, or U-shaped.

[0012] This packing lid features a U-shaped, C-shaped, or U-shaped venting gap. On one hand, this ensures that the radial length of the venting gap is smaller for the same venting area, preventing excessively long venting gaps from affecting the overall structural strength of the packing lid. On the other hand, this specific curved shape (especially the U-shaped / U-shaped) allows the portion of the lid enclosed by the venting gap to undergo slight elastic deformation when subjected to excessive steam pressure inside the packing container. This causes the gap to expand locally and instantly, achieving rapid pressure relief. After the pressure decreases, the gap automatically returns to its original shape, effectively preventing the lid from being forced open or deformed due to a sudden increase in pressure. It also prevents liquid leakage under normal conditions.

[0013] In the above-mentioned breathable and leak-proof packing cover, the venting gap is composed of several elongated venting holes, and there is a connecting part between two adjacent venting holes. The connecting part and the cover body are formed into an integral structure.

[0014] The ventilation gap is designed as a series of long, narrow ventilation holes separated by connecting parts. This design maintains the ventilation function while enhancing the structural strength and integrity of the cover in this area through the one-piece molded connecting parts. It prevents the gap from being excessively deformed or even torn when subjected to external forces or internal pressure, thereby improving the durability and reliability of the cover.

[0015] In the above-mentioned breathable and leak-proof packing cover, the length of the vent hole ranges from 2mm to 500mm, and the length L of the connecting part ranges from 0.5mm to 5mm.

[0016] By limiting the length of the connecting section to within the range of 0.5mm-5mm, the requirements for structural strength and exhaust efficiency are precisely balanced. A connecting section that is too short would lack strength, while a connecting section that is too long would excessively divide the exhaust gap, reducing the effective exhaust area. This length range ensures that the connecting section can provide sufficient support, while allowing the overall gap formed by adjacent exhaust holes to still effectively meet exhaust requirements.

[0017] In the above-mentioned breathable and leak-proof packing cover, the venting gap is provided at the front of the cover body, and the inner side of the venting gap forms a flip cover that can be folded upwards.

[0018] The venting gap is located at the front of the lid, and its inner side forms a flip-up lid that can be folded upwards. This cleverly combines the venting function area with the drinking spout (the area below the flip-up lid). This design allows the edge of the lid (where the venting gap is located) to continuously provide ventilation and prevent leakage when the lid is closed. When you need to drink, you can simply flip up this lid to drink directly without having to open the entire lid or find other drinking spouts, making it convenient to operate.

[0019] In the above-mentioned breathable and leak-proof packing cover, the flip cover has an upwardly protruding bump, and the cover body on the rear side of the flip cover is provided with a downwardly recessed positioning groove. The flip cover can be folded backward so that the bump can be inserted into the positioning groove.

[0020] By setting protrusions on the flip cover and positioning grooves on the corresponding cover body, a stable positioning is achieved after the flip cover is opened. When the flip cover is folded backward, the protrusions are engaged in the positioning grooves, and the physical locking action reliably fixes the flip cover in the open position, preventing it from accidentally springing back and closing during use, which would affect drinking and improve the user experience.

[0021] In the above-mentioned breathable and leak-proof packing cover, a long strip-shaped folding groove is provided between the flip cover and the positioning groove, and the venting gap extends into the folding groove.

[0022] A long strip-shaped folding groove is set between the flip cover and the positioning groove, and a venting gap extends within the folding groove. On the one hand, this provides a clear hinge line for the flipping action of the flip cover, making the folding smoother and more durable; on the other hand, the venting gap extending here ensures that the flip cover can fold around the folding groove when folding.

[0023] In the aforementioned breathable and leak-proof packing cover, the front side of the protrusion is provided with striped or grid-like anti-slip parts.

[0024] The striped or grid-like anti-slip features on the front side of the bump significantly increase the friction when the user's fingers or thumb contact the bump, making it easier for the user to apply force and operate (lift or press down) the flip cover stably. This is especially beneficial when the user's fingers are wet or oily, greatly improving the convenience and reliability of opening and closing the flip cover.

[0025] In the above-mentioned breathable and leak-proof packing cover, the middle part of the cover body is formed with an upward protruding boss, and the venting gap is provided on the upper side of the boss.

[0026] A raised platform is provided in the middle of the lid, and the vent is located on the upper side of the platform. This design elevates the vent, keeping it away from the junction of the lid and the container and the liquid surface. This effectively reduces the risk of liquid contacting or even clogging the vent due to shaking, splashing, or condensation buildup during transport or container tilting. This further enhances the reliability of leak-proof packaging, making it especially suitable for packaging foods with a lot of broth (such as spicy hot pot).

[0027] Compared with the prior art, the technical effects of this utility model are as follows:

[0028] This invention utilizes the principle of liquid surface tension to create venting gaps with a width of 0.1μm-100μm on the lid. This allows gases (such as water vapor from hot drinks or gas from carbonated beverages) to be smoothly discharged through the venting gaps, while liquids (soup, beverages, etc.) cannot leak through the venting gaps due to surface tension. This effectively solves the problem of increased pressure and liquid leakage when holding hot drinks or food with soup. The structure itself is extremely simple, and the laser penetration processing method is simple to manufacture and has low production costs. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of this utility model. Figure 1 .

[0030] Figure 2 This is a schematic diagram of the overall structure of this utility model. Figure 1 .

[0031] Figure 3 This is a partial enlargement of the flip cover of this utility model. Figure 1 .

[0032] Figure 4 This is a partial enlargement of the flip cover of this utility model. Figure 1 .

[0033] Figure 5 yes Figure 2 A magnified view of a portion of point A in the middle.

[0034] Figure 6 This is a schematic diagram of the overall structure of this utility model. Figure 3 A magnified view of a section of the exhaust vent.

[0035] In the diagram, 1 is the cover; 11 is the vent gap; 111 is the vent hole; 112 is the connecting part; 12 is the flip cover; 13 is the protrusion; 131 is the anti-slip part; 14 is the positioning groove; 15 is the folding groove; and 16 is the boss. Detailed Implementation

[0036] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0037] This breathable and leak-proof packaging lid includes a lid body 1, on which an venting slit 11 is provided. The width D of the venting slit 11 ranges from 0.1μm to 100μm. This packaging lid uses laser penetration to directly create a specific shape according to requirements. Therefore, at the cut position, there will be a venting slit 11 with a width of 0.1μm-100μm. This venting slit 11 is only permeable to air and not water. The aforementioned laser penetration production method is simple and has low production costs. By setting an venting slit 11 with a width of 0.1μm-100μm on the lid body 1, this packaging lid utilizes the principle of liquid surface tension to allow gas (such as water vapor from hot drinks or gas from carbonated drinks) to be smoothly discharged through the venting slit 11, while liquid (soup, beverages, etc.) cannot leak through the venting slit 11 due to surface tension. This effectively solves the problem of increased pressure and liquid leakage inside the container when holding hot drinks or food with soup. The structure itself is extremely simple and requires no complex additional components.

[0038] Furthermore, the venting gap 11 is U-shaped, C-shaped, or U-shaped. This packaging cover designs the venting gap 11 in U-shape, C-shape, or U-shape. On the one hand, this ensures that, for the same venting area, the radial length of the venting gap 11 is relatively small, avoiding the impact of an excessively long radially long venting gap 11 on the overall structural strength of the packaging cover. On the other hand, this specific curved shape structure (especially U-shaped / U-shaped) allows the portion of the cover 1 enclosed by the venting gap 11 to undergo slight elastic deformation when subjected to excessive steam pressure inside the packaging container. This causes the gap to expand locally and momentarily, achieving rapid pressure relief. After the pressure decreases, the gap automatically returns to its original shape, effectively preventing the cover 1 from being forced open or deformed due to a sudden increase in pressure, and also preventing liquid leakage under normal conditions. The shapes of the venting gap 11 described above are just three commonly used shapes; it can also be W-shaped, Z-shaped, or other shapes.

[0039] Example 1

[0040] The venting gap 11 is strip-shaped and has no connection points. This design is suitable for situations where the vapor pressure inside the packaging container is high. When the vapor pressure is too high, the portion of the cover 1 enclosed by the venting gap 11 can undergo slight elastic deformation, causing the gap to expand instantaneously and achieve rapid pressure relief. After the pressure decreases, the gap can automatically return to its original shape, effectively preventing the cover 1 from being blown open or deformed and damaged due to a sudden increase in pressure, and also preventing liquid leakage under normal conditions.

[0041] Example 2

[0042] like Figure 1-3 and Figure 5 As shown, the venting gap 11 consists of several elongated vent holes 111, with a connecting portion 112 between adjacent vent holes 111. The connecting portion 112 is integrally formed with the cover body 1. The length of the vent holes 111 ranges from 2mm to 500mm, and the length L of the connecting portion 112 ranges from 0.5mm to 5mm. Designing the venting gap 11 as a series of elongated vent holes 111 separated by the connecting portion 112 maintains ventilation while enhancing the structural strength and integrity of the cover body 1 in this area through the integrally formed connecting portion 112. This prevents excessive deformation or even tearing of the gap under external force or internal pressure, improving the durability and reliability of the cover body 1. Limiting the length of the connecting portion 112 to the range of 0.5mm-5mm precisely balances the requirements of structural strength and venting efficiency. An excessively short connecting portion 112 would lack sufficient strength, while an excessively long connecting portion 112 would overly divide the venting gap 11, reducing the effective venting area. This length range ensures that the connection 112 can provide sufficient support, while the overall gap formed by the adjacent exhaust holes 111 can still effectively meet the exhaust requirements.

[0043] In the two embodiments described above, if the lid 1 is a cup lid, such as Figure 1-4As shown, an exhaust slit 11 is provided at the front of the cover 1, and the inner side of the exhaust slit 11 forms a flip cover 12 that can be folded upwards; an upwardly protruding protrusion 13 is formed on the flip cover 12, and a downwardly recessed positioning groove 14 is provided on the cover 1 at the rear of the flip cover 12, so that the flip cover 12 can be folded backwards to allow the protrusion 13 to be inserted into the positioning groove 14; a long strip-shaped folding groove 15 is provided between the flip cover 12 and the positioning groove 14, and the exhaust slit 11 extends into the folding groove 15; a striped or grid-shaped anti-slip part 131 is provided on the front side of the protrusion 13.

[0044] A venting gap 11 is positioned at the front of the lid 1, forming an upward-folding flap 12 on its inner side. This cleverly combines the venting area with the drinking spout (the area below the flap 12). This design ensures that when the flap 12 is closed, its edge (where the venting gap 11 is located) provides continuous ventilation and leak-proof function. When drinking is needed, simply flip open the flap 12 to drink directly, without needing to open the entire lid 1 or find another drinking spout, making operation convenient. A protrusion 13 is provided on the flap 12, and a corresponding positioning groove 14 is provided on the lid 1. This achieves stable positioning of the flap 12 after it is opened. When the flap 12 is folded backward, the protrusion 13 engages with the positioning groove 14, using physical locking to reliably fix the flap 12 in the open position, preventing it from slipping out during use. Unexpected rebound closure during the process affects drinking, thus improving the user experience; a long strip-shaped folding groove 15 is provided between the flip cover 12 and the positioning groove 14, and an exhaust gap 11 extends within the folding groove 15. On the one hand, this provides a clear hinge line for the folding action of the flip cover 12, making the folding smoother and more durable; on the other hand, the exhaust gap 11 extending to this point ensures that the flip cover 12 can fold around the folding groove 15 when folding; a striped or grid-like anti-slip part 131 is provided on the front side of the protrusion 13, which significantly increases the friction when the user's fingers or thumb contact the protrusion 13, making it easier for the user to apply force and operate (lift or press down) the flip cover 12 stably, especially when the fingers are wet or oily, greatly improving the convenience and reliability of opening and closing the flip cover 12.

[0045] In both of the above embodiments, if the lid 1 is a bowl lid, such as Figure 6 As shown, the lid 1 has an upwardly protruding boss 16 formed in the middle, and the vent slit 11 is located on the upper side of the boss 16. The upwardly protruding boss 16 in the middle of the lid 1, with the vent slit 11 located on the upper side of the boss 16, elevates the vent slit 11, keeping it away from the junction of the lid 1 and the container, as well as the liquid surface. This effectively reduces the risk of liquid contacting or even blocking the vent slit 11 due to shaking, splashing, or condensation buildup during transport or container tilting, further enhancing the reliability of leak-proof packaging. This design is particularly suitable for packaging foods with a lot of broth (such as spicy hot pot).

[0046] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection defined by the claims of the present utility model.

Claims

1. A breathable leakproof packing cover comprising a cover body (1), characterized in that: The cover (1) is provided with an exhaust slit (11), and the width D of the exhaust slit (11) ranges from 0.1μm to 100μm.

2. A breathable, leak-resistant, packing cover according to claim 1, wherein: The exhaust slit (11) is U-shaped, C-shaped, or U-shaped.

3. A breathable, leak-resistant, packing cover according to claim 1, wherein: The exhaust slit (11) is composed of several elongated exhaust holes (111), and there is a connecting part (112) between two adjacent exhaust holes (111). The connecting part (112) and the cover (1) are formed into an integral structure.

4. A breathable, leak-resistant, packing cover according to claim 3, wherein: The length of the exhaust hole (111) ranges from 2mm to 500mm, and the length L of the connecting part (112) ranges from 0.5mm to 5mm.

5. A breathable, leak-resistant, packing cover according to any one of claims 1-4, characterized in that: The venting slit (11) is located at the front of the cover (1), and the inner side of the venting slit (11) forms a flip cover (12) that can be folded upwards.

6. A breathable, leak-resistant, packing cover according to claim 5, wherein: The flip cover (12) has an upward protrusion (13) formed on it, and the cover body (1) on the rear side of the flip cover (12) has a downward recessed positioning groove (14). The flip cover (12) can be folded backward so that the protrusion (13) can be inserted into the positioning groove (14).

7. A breathable, leak-resistant, packing cover according to claim 6, wherein: A long strip-shaped folding groove (15) is provided between the flip cover (12) and the positioning groove (14), and the exhaust gap (11) extends into the folding groove (15).

8. A breathable, leak-resistant, packing cover according to claim 6, wherein: The front side of the protrusion (13) is provided with striped or grid-shaped anti-slip parts (131).

9. A breathable, leak-resistant, lidding stock for packaging according to any one of claims 1 to 4, wherein: The cover (1) has an upwardly protruding boss (16) formed in the middle, and the exhaust vent (11) is located on the upper side of the boss (16).

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