A breathable plastic lunch box

Abstract

The utility model discloses a kind of breathable plastic lunch box, including box body and box cover, the box body outer wall is fixedly installed with locking block, the box cover inner wall is fixedly installed with first sealing gasket, the box cover upper end surface is equipped with mounting groove, the mounting groove bottom wall is equipped with a plurality of air holes, the mounting groove bottom wall is fixedly installed with breathable membrane, the mounting groove bottom wall is fixedly installed with protective frame, the sealing plate is rotatably installed in the protective frame by rotating mechanism.

Description

Technical Field

[0001] This utility model relates to the field of plastic lunch box technology, and in particular to a breathable plastic lunch box. Background Technology

[0002] Plastic food containers are made of thermoplastic materials such as polypropylene (PP) and polystyrene (PS). They are lightweight, shatter-resistant, and low-cost, and are widely used in takeout and home settings.

[0003] With the fast pace of life and the rapid development of the food delivery industry, plastic food containers are increasingly used as the main containers for takeout food. However, most existing plastic food containers are too airtight. When containing food with soup or high temperature, the steam inside the container cannot escape, resulting in high pressure. This not only makes it easy for soup to splash out when the container is opened, but may also damage the container due to excessive pressure, making it impractical. Therefore, it is necessary to redesign a breathable plastic food container to address the above problems. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a breathable plastic lunchbox.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A breathable plastic lunch box includes a box body and a lid. A locking block is fixedly installed on the outer wall of the box body, and a first sealing gasket is fixedly installed on the inner wall of the lid. An installation groove is formed on the upper surface of the lid, and multiple ventilation holes are formed on the bottom wall of the installation groove. A breathable membrane is fixedly installed on the bottom wall of the installation groove, and a protective frame is fixedly installed on the bottom wall of the installation groove. A sealing plate is rotatably installed inside the protective frame via a rotating mechanism. A handle is fixedly installed on the outer wall of the sealing plate. Two sliding rods are slidably installed through the outer wall of the protective frame. A pressing block is fixedly installed at one end of each of the two sliding rods. A pressing ramp that cooperates with the sealing plate is formed on the upper surface of the pressing block. A connecting plate is fixedly installed at the other end of each of the two sliding rods. Springs are installed on the outer walls of both sliding rods, and the two ends of the two springs are elastically connected to the outer wall of the protective frame and the inner wall of the connecting plate, respectively.

[0007] Preferably, the rotating mechanism includes a rotating shaft rotatably mounted inside the protective frame, the rotating shaft rotatably penetrating the sealing plate.

[0008] Preferably, the outer wall of the locking block is provided with a locking groove, and the inner wall of the box cover is fixedly installed with a locking strip that cooperates with the locking groove.

[0009] Preferably, a connecting frame is fixedly installed on the bottom wall of the mounting groove, and a second sealing gasket that mates with the upper end face of the connecting frame is fixedly installed on the inner wall of the sealing plate.

[0010] Preferably, the outer wall of the box cover is provided with multiple anti-slip protrusions, and multiple anti-collision sleeves are fixedly installed on the outer wall of the box cover.

[0011] The beneficial effects of this utility model are:

[0012] By incorporating components such as a breathable membrane, sealing plate, spring, and compression block, when the connecting plate is pulled, the compression block releases the pressure on the sealing plate. The sealing plate can be rotated by the handle to open the vent and release the steam inside the box. After pressing the sealing plate to fit against the connecting frame, the spring forms a mechanical lock through the compression block. This, combined with the second sealing gasket, achieves a double seal, solving the air pressure problem caused by excessive sealing in traditional lunch boxes while maintaining good sealing performance when needed. Attached Figure Description

[0013] Figure 1 This is a structural schematic diagram of a breathable plastic lunch box proposed in this utility model;

[0014] Figure 2 for Figure 1 A schematic diagram of the vertical section structure;

[0015] Figure 3 This is a top view of a breathable plastic lunchbox proposed in this utility model.

[0016] Figure 4 for Figure 2 Enlarged schematic diagram of the structure at point A in the diagram;

[0017] Figure 5 for Figure 3 Enlarged schematic diagram of the structure at point B in the diagram;

[0018] Figure 6 for Figure 3 A magnified schematic diagram of the structure at point C.

[0019] In the diagram: 1. Box body, 2. Box lid, 3. Locking block, 4. Locking strip, 5. First sealing gasket, 6. Breathable membrane, 7. Connecting frame, 8. Protective frame, 9. Rotating shaft, 10. Sealing plate, 11. Second sealing gasket, 12. Handle, 13. Slide rod, 14. Extrusion block, 15. Connecting plate, 16. Spring, 17. Anti-slip protrusion, 18. Anti-collision sleeve. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] Reference Figure 1-6 A breathable plastic lunch box includes a box body 1 and a lid 2. A locking block 3 is fixedly installed on the outer wall of the box body 1. A first sealing gasket 5 is fixedly installed on the inner wall of the lid 2. An installation groove is opened on the upper surface of the lid 2. Multiple ventilation holes are opened on the bottom wall of the installation groove. A breathable membrane 6 is fixedly installed on the bottom wall of the installation groove. A protective frame 8 is fixedly installed on the bottom wall of the installation groove. A sealing plate 10 is rotatably installed inside the protective frame 8 through a rotating mechanism. A handle 12 is fixedly installed on the outer wall of the sealing plate 10. Two sliding rods 13 are slidably installed through the outer wall of the protective frame 8. A squeezing block 14 is fixedly installed at one end of the two sliding rods 13. A squeezing ramp that cooperates with the sealing plate 10 is opened on the upper surface of the squeezing block 14. A connecting plate 15 is fixedly installed at the other end of the two sliding rods 13. A spring 16 is installed on the outer wall of both sliding rods 13. The two ends of the two springs 16 are elastically connected to the outer wall of the protective frame 8 and the inner wall of the connecting plate 15, respectively.

[0022] Furthermore, the breathable membrane 6 is made of food-grade TPU material, which can withstand temperatures from -40℃ to 120℃, ensuring both steam discharge and preventing food residue leakage; the spring 16 is made of stainless steel, which is elastic and durable, ensuring that the extrusion block 14 can be stably reset.

[0023] The rotating mechanism includes a rotating shaft 9 installed inside the protective frame 8, which rotates through the sealing plate 10.

[0024] Furthermore, the rotating shaft 9 is connected to the inner wall of the protective frame 8 by a bearing, allowing for smooth rotation and enabling the sealing plate 10 to rotate flexibly around it, making it easy to open or close the vent hole.

[0025] The outer wall of the locking block 3 has a locking groove, and the inner wall of the cover 2 has a locking strip 4 that mates with the locking groove.

[0026] Furthermore, the locking groove and the locking strip 4 have a concave-convex fit structure. When installed, the locking strip 4 is embedded in the locking groove, which can enhance the firmness of the connection between the box body 1 and the box cover 2. At the same time, the first sealing gasket 5 is deformed under pressure, which improves the overall sealing performance.

[0027] A connecting frame 7 is fixedly installed on the bottom wall of the mounting groove, and a second sealing gasket 11 that mates with the upper end face of the connecting frame 7 is fixedly installed on the inner wall of the sealing plate 10.

[0028] Furthermore, the second sealing gasket 11 is made of silicone, which has good elasticity. When the sealing plate 10 is attached to the connecting frame 7, it can form a tight seal to prevent gas or liquid from leaking from the vent.

[0029] The outer wall of the lid 2 is provided with multiple anti-slip protrusions 17, and multiple anti-collision sleeves 18 are fixedly installed on the outer wall of the lid 2.

[0030] Furthermore, the anti-collision sleeve 18 is made of elastic silicone, which can cushion the lunchbox when it is hit, protecting the lunchbox structure.

[0031] In use, food is placed in the box body 1, and then the lid 2 is aligned with the box body 1, so that the locking strip 4 is embedded in the locking groove of the locking block 3, completing the installation of the box body 1 and the lid 2. At this time, the first sealing gasket 5 plays a sealing role. When it is necessary to release the steam inside the box, the connecting plate 15 is pulled by hand, which drives the slide rod 13 to slide along the outer wall of the protective frame 8, and the squeezing block 14 moves outward accordingly. At this time, the squeezing block 14 can release the squeezing of the sealing plate 10. Then, the sealing plate 10 can be rotated on the outer wall of the rotating shaft 9 by the handle 12, so that the sealing plate 10 is separated from the connecting frame 7 (e.g., Figure 1 (As shown in the diagram), at this time the vent is open, and the steam inside the box is discharged through the breathable membrane 6, which can maintain the breathability and prevent food residue from leaking out.

[0032] After the steam is released, the sealing plate 10 can be rotated to be parallel to the upper surface of the connecting frame 7. At this time, the outer wall of the sealing plate 10 can be squeezed, so that its bottom wall squeezes the squeezing slope. At this time, the squeezing block 14 is subjected to force, which can drive the connecting plate 15 to move and pull the spring 16 through the two sliding rods 13. At this time, continue to press the sealing plate 10 until it is completely in contact with the connecting frame 7. The second sealing gasket 11 is in close contact with the upper surface of the connecting frame 7. When the top surface of the sealing plate 10 is lower than the bottom wall of the squeezing block 14, the elastic restoring force of the spring 16 is transmitted to the squeezing block 14 through the sliding rod 13, so that the bottom wall of the squeezing block 14 firmly abuts the surface of the sealing plate 10. During the carrying of the lunch box, the multiple anti-slip protrusions 17 on the outer wall of the lid 2 can increase the friction between the hand and the lid 2, effectively preventing the lunch box from slipping from the hand. The multiple anti-collision sleeves 18 fixedly installed on the outer wall of the lid 2 can buffer the lunch box when it is accidentally hit, reduce the impact of external force on the lunch box, protect the structural integrity of the lunch box, and extend the service life of the lunch box. When the lunch box needs to be opened, simply pull the lid 2 upward to make the locking strip 4 disengage from the locking groove of the locking block 3, and the lid 2 can be separated from the box body 1 for easy access to the food inside the box.

[0033] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A breathable plastic lunch box, comprising a box body (1) and a box lid (2), characterized in that, A locking block (3) is fixedly installed on the outer wall of the box body (1), a first sealing gasket (5) is fixedly installed on the inner wall of the box cover (2), an installation groove is opened on the upper surface of the box cover (2), a plurality of ventilation holes are opened on the bottom wall of the installation groove, a breathable membrane (6) is fixedly installed on the bottom wall of the installation groove, a protective frame (8) is fixedly installed on the bottom wall of the installation groove, a sealing plate (10) is rotatably installed inside the protective frame (8) through a rotating mechanism, a handle (12) is fixedly installed on the outer wall of the sealing plate (10), and the protective frame... (8) Two sliding rods (13) are slidably installed on the outer wall. One end of each sliding rod (13) is fixedly installed with an extrusion block (14). The upper surface of the extrusion block (14) is provided with an extrusion ramp that cooperates with the sealing plate (10). The other end of each sliding rod (13) is fixedly installed with a connecting plate (15). Springs (16) are installed on the outer wall of each sliding rod (13). The two ends of the two springs (16) are elastically connected to the outer wall of the protective frame (8) and the inner wall of the connecting plate (15), respectively.

2. The breathable plastic lunch box according to claim 1, characterized in that, The rotating mechanism includes a rotating shaft (9) that is rotatably installed inside the protective frame (8), and the rotating shaft (9) rotatably passes through the sealing plate (10).

3. A breathable plastic lunch box according to claim 2, characterized in that, The outer wall of the locking block (3) is provided with a locking groove, and the inner wall of the box cover (2) is fixedly installed with a locking strip (4) that cooperates with the locking groove.

4. A breathable plastic lunch box according to claim 3, characterized in that, A connecting frame (7) is fixedly installed on the bottom wall of the mounting groove, and a second sealing gasket (11) that mates with the upper end face of the connecting frame (7) is fixedly installed on the inner wall of the sealing plate (10).

5. A breathable plastic lunch box according to claim 4, characterized in that, The outer wall of the box cover (2) is provided with multiple anti-slip protrusions (17), and multiple anti-collision sleeves (18) are fixedly installed on the outer wall of the box cover (2).

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