Leakage-proof and air-permeable structure for plastic meal box

Abstract

The utility model discloses a kind of leak-proof ventilation structures for plastic meal box belong to plastic meal box technical field, including cover, the installation portion is set on the cover, detachable leak-proof structure is set in installation portion interior, installation hole is opened in installation portion, leak-proof structure includes stop block, there is exhaust passage in communication with stop block, exhaust passage is communicated with installation hole, air inlet passage is opened in the inside of stop block and communicated with exhaust passage, when leak-proof structure is installed in the interior of installation portion, there is tiny gap between the both ends of air inlet passage and installation portion, micro groove is evenly provided around stop block, wherein the micro groove located in both sides is communicated with the tiny gap of both ends of air inlet passage, the utility model, by capillary action and optimization channel design, the combination of efficient ventilation and reliable leak-proof is realized, structure is simple, low in cost, applicable to various plastic meal box, significantly reduce soup leakage problem and prolong service life.

Description

Technical Field

[0001] This utility model relates to the field of plastic lunch box technology, specifically to a leak-proof and breathable structure for plastic lunch boxes. Background Technology

[0002] Disposable plastic lunch boxes have shifted from foam lunch boxes to environmentally friendly lunch boxes. The original foam lunch boxes were phased out because they were not heat-resistant and the manufacturing process damaged the environment. They have been replaced by plastic lunch boxes, paper lunch boxes, wooden lunch boxes, biodegradable lunch boxes, etc. Among them, plastic has the characteristics of low toxicity, high melting point, strong plasticity, simple production and relatively low cost, so it has become the mainstream material for manufacturing disposable fast food boxes.

[0003] Existing disposable plastic lunch boxes typically use simple vents to release internal steam pressure, but this design is prone to causing soup leakage, especially when the lunch box is tilted or transported. Some solutions use a one-way valve structure, but this has problems such as complex structure, high cost, easy clogging, and decreased leak-proof effect after long-term use.

[0004] The above-mentioned technical conditions also have shortcomings: they cannot simultaneously achieve both high-efficiency breathability and reliable leak prevention, resulting in inconvenience for users and food waste.

[0005] Based on this, the present invention designs a leak-proof and breathable structure for plastic lunch boxes to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to provide a leak-proof and breathable structure for plastic lunch boxes to solve the above-mentioned technical problems.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a leak-proof and breathable structure for a plastic lunch box, comprising a cover, an installation part on the cover, a detachable leak-proof structure inside the installation part, an installation hole on the installation part, a plug on the plug, an exhaust channel connected to the plug, the exhaust channel being connected to the installation hole, an air inlet channel connected to the exhaust channel inside the plug, and when the leak-proof structure is installed inside the installation part, there are tiny gaps between the two ends of the air inlet channel and the installation part, and microgrooves are evenly arranged around the plug, wherein the microgrooves on both sides are connected to the tiny gaps at both ends of the air inlet channel.

[0008] By adopting the above technical solution, the food container can be vented normally when it is upright, and when it is tilted or inverted, a seal is formed through capillary structure, thus improving the leak-proof effect of the food container.

[0009] Preferably, a retaining ring is fixedly connected to the top of the outer wall of the exhaust channel, and the retaining ring is pressed against the mounting part during installation.

[0010] By adopting the above technical solution, the retaining ring is pressed tightly against the installation part, enhancing the structural stability and preventing the leak-proof structure from loosening or falling off.

[0011] Preferably, the thickness of the micro-gap is 0.1mm-0.5mm, and the thickness is unevenly distributed across the entire contact surface.

[0012] By adopting the above technical solution, the unevenly distributed micro-gap optimizes the gas flow path, improves air permeability, and reduces the risk of liquid infiltration.

[0013] Preferably, the thickness of the microgrooves located on both sides of the block is 0.2mm-0.5mm.

[0014] By adopting the above technical solution, microgrooves of a specific thickness enhance capillary action and more effectively block liquids when tilted.

[0015] Preferably, the air intake channel is composed of two sets of symmetrical inclined channels, and the angle between the inclined channels and the horizontal plane is 5°-10°.

[0016] By adopting the above technical solution, the inclined channel design promotes unidirectional gas flow, prevents liquid backflow, and improves sealing performance.

[0017] In summary, this application has the following beneficial technical effects: This structure achieves a combination of efficient air permeability and reliable leak prevention through capillary action and optimized channel design. It has a simple structure, low cost, is suitable for various plastic lunch boxes, significantly reduces soup leakage problems, and extends service life. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of this embodiment;

[0020] Figure 2 This is a schematic diagram showing the breakdown of the leak-proof structure in this embodiment;

[0021] Figure 3 This is a schematic diagram showing another perspective of the leak-proof structure in this embodiment;

[0022] Figure 4 This is a schematic cross-sectional view of the leak-proof structure in this embodiment.

[0023] The attached diagram lists the components represented by each number as follows:

[0024] 1. Cover; 2. Mounting part; 3. Leak-proof structure; 31. Block; 32. Exhaust channel; 33. Snap ring; 34. Intake channel; 35. Micro-groove; 4. Mounting hole. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0026] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0027] A leak-proof and breathable structure for a plastic lunchbox includes a lid 1 with an mounting part 2 on the lid 1. The mounting part 2 is a protrusion on the lid 1 that can extend outward or inward. A detachable leak-proof structure 3 is provided inside the mounting part 2. The mounting part 2 has a mounting hole 4. The leak-proof structure 3 includes a plug 31 with an exhaust channel 32 connected to it. The exhaust channel 32 is connected to the mounting hole 4, allowing air to be vented from the inside of the lunchbox. An air inlet channel 34 is provided inside the plug 31, connected to the exhaust channel 32. When the leak-proof structure 3 is installed inside the mounting part 2, there are tiny gaps between the two ends of the air inlet channel 34 and the mounting part 2. Microgrooves 35 are evenly provided around the plug 31, with the microgrooves 35 on both sides connected to the tiny gaps at both ends of the air inlet channel 34, thus forming a capillary effect to prevent liquid from continuing to flow out, thereby forming a temporary liquid seal to prevent soup from leaking out of the lunchbox and improving the usability of the lunchbox.

[0028] Furthermore, a retaining ring 33 is fixedly connected to the top of the outer wall of the exhaust channel 32. The retaining ring 33 is pressed against the mounting part 2 during installation, which can improve the installation firmness of the leak-proof structure 3.

[0029] Furthermore, the thickness of the micro-gap is 0.1mm-0.5mm, and the thickness is unevenly distributed across the entire contact surface.

[0030] Furthermore, the microgrooves 35 located on both sides of the block 31 have a thickness of 0.2mm-0.5mm, which can form a capillary structure from the side, allowing gas to enter from the microgrooves 35 on both sides and then enter the air intake channel 34 from the top of the microgrooves 35 at both ends, thereby improving exhaust efficiency.

[0031] Furthermore, the air intake channel 34 consists of two sets of symmetrical inclined channels with an angle of 5°-10° to the horizontal plane, which provides better leak prevention than the horizontally set channels.

[0032] The implementation principle of this embodiment is as follows: when the steam pressure inside the food container increases, the gas enters the exhaust channel 32 through the tiny gap between the air inlet channel 34 and the mounting part 2 and is discharged; at the same time, the liquid is blocked by the micro groove 35 and the gap due to capillary action, forming a liquid seal, which effectively prevents leakage, while the inclined air inlet channel 34 and the retaining ring 33 design ensure structural stability and long-term reliability.

[0033] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0034] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A leak-proof and breathable structure for a plastic lunch box, comprising a lid (1), characterized in that: The cover (1) is provided with an installation part (2), and a detachable leak-proof structure (3) is provided inside the installation part (2). An installation hole (4) is provided on the installation part (2). The leak-proof structure (3) includes a plug (31). An exhaust channel (32) is connected to the plug (31). The exhaust channel (32) is connected to the installation hole (4). An air intake channel (34) connected to the exhaust channel (32) is provided inside the plug (31). When the leak-proof structure (3) is installed inside the installation part (2), there is a small gap between the two ends of the air intake channel (34) and the installation part (2). Microgrooves (35) are evenly provided around the plug (31). The microgrooves (35) on both sides are connected to the small gaps at both ends of the air intake channel (34).

2. The leak-proof and breathable structure for a plastic lunchbox according to claim 1, characterized in that: A retaining ring (33) is fixedly connected to the top of the outer wall of the exhaust channel (32), and the retaining ring (33) is pressed against the mounting part (2) during installation.

3. The leak-proof and breathable structure for a plastic lunch box according to claim 1, characterized in that: The thickness of the micro-gap is 0.1mm-0.5mm, and the thickness is unevenly distributed across the entire contact surface.

4. The leak-proof and breathable structure for a plastic lunch box according to claim 1, characterized in that: The thickness of the microgrooves (35) located on both sides of the block (31) is 0.2mm-0.5mm.

5. The leak-proof and breathable structure for a plastic lunch box according to claim 1, characterized in that: The air intake channel (34) consists of two sets of symmetrical inclined channels, with the angle between the inclined channels and the horizontal plane being 5°-10°.

Images