A type of modular foam lunch box

Abstract

This utility model belongs to the technical field of tableware, and relates to a compartmentalized foam lunch box, comprising several compartmentalized units formed by vertical walls and a bottom wall. An outer edge wall is provided at the top of the outer edge of the lunch box, connecting the outer vertical walls of the compartmentalized units into one unit. A partition wall is provided at the top of the inner edge of the lunch box, connecting the adjacent vertical walls of adjacent compartmentalized units into one unit. A T-shaped connection structure is formed between the partition wall and the outer edge wall. A reinforcing structure is provided at the T-shaped connection, including a recessed reinforcing groove. A downwardly protruding reinforcing rib is formed on the back of the reinforcing groove, and both ends of the reinforcing rib are connected to the adjacent vertical walls of the adjacent compartmentalized units. The compartmentalized foam lunch box provided by this utility model strengthens the structural strength of the lunch box, especially at the connection points between adjacent compartments.

Description

Technical Field

[0001] This utility model belongs to the technical field of tableware, and relates to a compartmentalized foam lunch box. Background Technology

[0002] With the rapid development of the food delivery industry, disposable plastic lunch boxes have become the mainstream product in the food packaging field due to their lightness and low cost. Compartmentalized lunch boxes can separate staple foods and various dishes for storage, preventing cross-contamination of flavors and facilitating consumption, making them the most popular in the market. However, compartmentalized lunch boxes also have their own drawbacks: the multi-compartment structure reduces the structural strength of the box, thus requiring the addition of reinforcing structures within the compartmentalized lunch boxes.

[0003] For example, Chinese utility model patent CN212415011U (January 29, 2021) discloses a partitioned lunch box, which includes a lunch box body. A food slot is formed on the top surface of the lunch box body. At least two food slots are provided, and each food slot consists of a bottom panel and at least three side panels. Folded edge reinforcing ribs are provided at the joints of adjacent side panels. This utility model utilizes the folded edge reinforcing ribs at the joints of adjacent side panels to improve the connection strength between adjacent side panels, thereby preventing deformation and bending at the joints under pressure.

[0004] However, for compartmentalized lunch boxes, each compartment holds food and is affected by its own independent gravity. The connection between the compartments becomes a stress concentration point, which is very easy to break during use. The above-mentioned lunch box only sets folded edge reinforcing ribs at the connection between adjacent side panels. Its effective range is limited to the corner of the compartment unit itself and cannot solve the problem of easy breakage at the connection between the compartments. Utility Model Content

[0005] This invention addresses the shortcomings of existing technologies by providing a compartmentalized foam lunchbox that strengthens the structural strength of the lunchbox, especially at the connection points between adjacent compartments.

[0006] To solve the above-mentioned technical problems, the objective of this utility model is achieved through the following technical solution:

[0007] A compartmentalized foam lunch box includes several compartmentalized units formed by vertical walls and a bottom wall. An outer edge wall is provided at the top of the outer edge of the lunch box, connecting the outer vertical walls of the compartmentalized units into one piece. A partition wall is provided at the top of the inner side of the lunch box, connecting the adjacent vertical walls of adjacent compartmentalized units into one piece. A T-shaped connection structure is formed between the partition wall and the outer edge wall. A reinforcing structure is provided at the T-shaped connection. The reinforcing structure includes a recessed reinforcing groove. A downwardly protruding reinforcing rib is formed on the back of the reinforcing groove. The two ends of the reinforcing rib are respectively connected to the adjacent vertical walls of the adjacent compartmentalized units into one piece.

[0008] In the above-mentioned compartmentalized foamed lunch box, the lunch box is made of starch foam, and the vertical wall, bottom wall, outer edge wall and partition wall are integrally foamed and formed in a mold.

[0009] In the above-mentioned compartmentalized foam lunch box, the number of compartmentalized units is not limited, but it is preferably a three-compartment, four-compartment, five-compartment, or six-compartment lunch box. The size and shape of each compartmentalized unit are also not limited, but all the compartmentalized units are combined to roughly form a rectangular structure.

[0010] In the aforementioned compartmentalized foam lunch box, the reinforcing groove is provided along the outer edge wall and penetrates the partition wall, and the dimension of the reinforcing groove along the length direction is greater than the width of the partition wall.

[0011] In the aforementioned compartmentalized foamed lunch box, the reinforcing groove has a V-shaped structure, with one end connected to the outer edge wall and the other end connected to the partition wall.

[0012] In the aforementioned compartmentalized foam lunch box, the outer edge wall is provided with a flange in the circumferential direction, and the partition wall is provided in the horizontal direction with its horizontal height lower than the horizontal height of the top of the flange.

[0013] In the aforementioned compartmentalized foam lunch box, a reinforcing plate perpendicular to the length direction of the outer edge is provided at the bottom of the flange. The reinforcing plate extends downward, and its inner and outer ends are respectively connected to the inner sidewall of the flange and the outer sidewall of the compartmentalized unit.

[0014] In the aforementioned type of compartmentalized foam lunch box, the upright walls have a wavy, ribbed structure.

[0015] In the aforementioned compartmentalized foam lunch box, the partition walls are located at the same horizontal level and are connected to each other as one unit. The top of the partition wall is provided with an upwardly protruding ridge, which extends along the length of the partition wall and is connected as one unit.

[0016] In the aforementioned compartmentalized foam lunch box, reinforcing ribs connecting its two side walls are provided within the reinforcing groove.

[0017] Compared with the prior art, this utility model has the following advantages:

[0018] This utility model provides a compartmentalized foam lunch box with a unique reinforcing structure at the T-shaped connection between the partition wall and the outer edge wall. This structure can significantly improve the structural strength, rigidity and deformation resistance of the lunch box at key stress concentration points between the compartments, thereby enhancing the load-bearing capacity, durability and reliability of the entire lunch box. It is especially suitable for foam lunch boxes with relatively low material strength. Attached Figure Description

[0019] Figure 1This is a perspective view of Embodiment 1 of this utility model;

[0020] Figure 2 This is another perspective view of Embodiment 1 of the present utility model;

[0021] Figure 3 This is a partial cross-sectional view of Embodiment 1 of this utility model;

[0022] Figure 4 This is a perspective view of Embodiment 2 of this utility model;

[0023] Figure 5 This is another perspective view of Embodiment 2 of this utility model;

[0024] Figure 6 This is a partial cross-sectional view of Embodiment 2 of this utility model;

[0025] Reference numerals: 1. Vertical wall; 2. Bottom wall; 3. Outer edge wall; 4. Separator wall; 5. Reinforcing groove; 6. Reinforcing rib; 7. Flanged edge; 8. Raised strip. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. See also: Figure 1-6 :

[0027] Example 1

[0028] Three-compartment foam lunch box

[0029] Comparison Appendix Figure 1 To be continued Figure 3 A compartmentalized foam lunch box includes several compartmentalized units formed by vertical walls 1 and bottom walls 2. An outer edge wall 3 is provided at the top of the outer edge of the lunch box to connect the outer vertical walls 1 of the compartmentalized units into one piece. A partition wall 4 is provided at the top of the inner side of the lunch box to connect the adjacent vertical walls 1 of adjacent compartmentalized units into one piece. A T-shaped connection structure is formed between the partition wall 4 and the outer edge wall 3. A reinforcing structure is provided at the T-shaped connection. The reinforcing structure includes a recessed reinforcing groove 5. A downwardly protruding reinforcing rib 6 is formed on the back of the reinforcing groove 5. The two ends of the reinforcing rib 6 are respectively connected to the adjacent vertical walls 1 of the adjacent compartmentalized units into one piece.

[0030] In this embodiment, a reinforced structure is formed by reinforcing groove 5 and reinforcing rib 6. Reinforcing groove 5 can increase the material thickness and local rigidity of the T-shaped point to resist tensile deformation. Reinforcing rib 6 on the back can constrain the relative position of the two side walls 1. Therefore, this reinforced structure can greatly enhance the structural strength of the T-shaped connection, avoid the risk of cracking at the T-shaped connection due to gravity, and thus enhance the load-bearing capacity, durability and reliability of the entire lunch box.

[0031] Specifically, the reinforcing groove 5 is provided along the direction of the outer edge wall 3 and penetrates the partition wall 4, and the dimension of the reinforcing groove 5 along the length direction is greater than the width of the partition wall 4.

[0032] Preferably, the reinforcing groove 5 has a V-shaped structure, with one end connected to the outer edge wall 3 and the other end connected to the partition wall 4 (see attached diagram). Figure 3 (relative to its cross-sectional structure).

[0033] To enhance the structural strength of the outer edge wall 3, a flange 7 is provided around the outer edge wall 3, and the partition wall 4 is arranged in the horizontal direction with its horizontal height lower than the horizontal height of the top of the flange 7.

[0034] To enhance the strength of the vertical wall 1 of the segmented unit, the vertical wall 1 is formed with a wave-shaped rib structure, and the rib structure is distributed vertically.

[0035] In this embodiment, the lunch box is made of foamed starch, and the vertical wall 1, bottom wall 2, outer edge wall 3 and partition wall 4 are integrally foamed and formed in a mold.

[0036] Example 2

[0037] Five-format foam lunch box

[0038] Comparison Appendix Figure 1 To be continued Figure 3 In this embodiment, the reinforcement structure at the T-shaped connection of the foam lunch box is the same as in Embodiment 1. However, compared to the three-compartment foam lunch box, the five-compartment foam lunch box requires further enhancement of the overall structural strength. Based on Embodiment 1, this embodiment further adds several reinforcing structures, specifically:

[0039] The bottom of the aforementioned flange 7 is provided with a reinforcing plate perpendicular to the length direction of the outer edge. The reinforcing plate extends downward, and its inner and outer ends are respectively connected to the inner side wall of the flange 7 and the outer side of the vertical wall 1 of the partition unit. By increasing the structural strength of the flange 7, the structural strength of the outer edge wall 3 can be further increased.

[0040] The aforementioned partition walls 4 are located at the same horizontal level and are connected to each other as one unit. The top of the partition wall 4 is provided with an upward protruding rib 8. The rib 8 extends along the length of the partition wall 4 and is connected as one unit. By adding the rib 8, the structural strength of the partition wall 4 can be greatly enhanced, thereby enhancing the overall deformation resistance of the lunch box.

[0041] The aforementioned reinforcing groove 5 is provided with reinforcing ribs connecting its two side walls. The reinforcing ribs can further increase the ability of the reinforcing groove 5 to resist tensile deformation.

[0042] 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 of the present utility model.

Claims

1. A compartmentalized foam lunch box, comprising a plurality of compartmentalized units formed by vertical walls (1) and a bottom wall (2), wherein an outer edge wall (3) is provided at the top of the outer edge of the lunch box to connect the outer vertical walls (1) of the compartmentalized units into one unit, and a partition wall (4) is provided at the top of the inner side of the lunch box to connect adjacent vertical walls (1) of adjacent compartmentalized units into one unit, characterized in that, A T-shaped connection structure is formed between the partition wall (4) and the outer edge wall (3). A reinforcing structure is provided at the T-shaped connection. The reinforcing structure includes a recessed reinforcing groove (5). A downwardly protruding reinforcing rib (6) is formed on the back of the reinforcing groove (5). The two ends of the reinforcing rib (6) are respectively connected to the adjacent vertical wall (1) of the adjacent partition unit.

2. The foamed tray according to claim 1, wherein The lunch box is made of starch foam, and the vertical wall (1), bottom wall (2), outer edge wall (3) and partition wall (4) are integrally foamed and formed in the mold.

3. The foamed lunch box according to claim 1, wherein The reinforcing groove (5) is arranged along the direction of the outer edge wall (3) and penetrates the partition wall (4). The dimension of the reinforcing groove (5) along the length direction is greater than the width of the partition wall (4).

4. The foamed lunch box according to claim 1, wherein The reinforcing groove (5) has a V-shaped structure, with one end connected to the outer edge wall (3) and the other end connected to the partition wall (4).

5. The foamed lunch box according to claim 1, wherein The outer edge wall (3) is provided with a flange (7) in the circumferential direction, and the partition wall (4) is provided in the horizontal direction and its horizontal height is lower than the horizontal height of the top of the flange (7).

6. The foamed lunch box according to claim 1, wherein The partition walls (4) are located at the same horizontal level and are connected to each other. The top of the partition wall (4) is provided with an upward protruding rib (8), which extends along the length of the partition wall (4) and is connected to each other.

7. The foamed lunch box according to claim 1, wherein The reinforcing groove (5) is provided with reinforcing ribs that connect its two side walls.

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