Paper lunch box with flange on top
By designing a three-dimensional flange at the top of the paper food box that is tightly embedded in the lid, the problem of easy deformation at the top of the paper food box is solved, the stiffness and strength are improved, the amount of material used is reduced, and the high-quality requirements of takeaway catering are met.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 刘文钦
- Filing Date
- 2025-08-18
- Publication Date
- 2026-06-12
AI Technical Summary
The top of existing paper food boxes is prone to weakening and deformation during use, making it difficult to provide effective support. Furthermore, increasing the material thickness to improve strength is not an economical approach.
Design a paper lunch box with a flange on the top. The top of the box includes an interior, a middle part and an exterior. A three-dimensional flange is set in the middle part to enhance rigidity and edge strength. The connection stability is improved through structural design such as the tight embedding of the three-dimensional flange with the lid and the insertion of inserts.
It enhances the rigidity and edge strength of paper food boxes, reduces material thickness, lowers costs, and meets the high-quality requirements of takeaway catering.
Smart Images
Figure CN224349314U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of lunch boxes, specifically to a paper lunch box with a flange on the top. Background Technology
[0002] One type of paper lunch box currently available (see...) Figure 1 As shown, it includes a box body 1 and a box lid 2. One side of the box lid can be connected to the box body by folding. The top of the box body is the top of the side of the box body. There are no special requirements for the top of the box body. Often, the strength of the top of the side of the box body is met by increasing the thickness of the entire side. This often requires the use of thicker paper, but it is still easy to become weak and deformed during use, making it difficult to provide good support. Summary of the Invention
[0003] In view of this, in order to solve the above-mentioned technical problems, the purpose of this utility model is to propose a paper lunch box with a flange on the top, which can enhance the stiffness and edge strength of the entire paper lunch box.
[0004] The technical solution adopted is as follows:
[0005] A paper lunch box with a flange on the top includes a box body and a lid. One side of the lid is connected to the box body by a fold that allows it to be closed. The box body includes a bottom, a side, and a top. The side surrounds the bottom to form an accommodating space, and the top surrounds the side. The top of the box body includes an interior, a middle section, and an exterior. The interior is a transitional plane, and the middle section has a three-dimensional flange. One end of the exterior is integrally connected to the middle section.
[0006] Furthermore, the cross-sectional shape of the three-dimensional flange is square, trapezoidal, or semi-circular.
[0007] Furthermore, the side portion and the top portion are integrally connected to form a side top, which is divided into a first side top, a second side top, a third side top, and a fourth side top. Extension portions are provided on the first side top and the third side top, and the extension portions are pressed and fixed to the back of the adjacent side top.
[0008] Furthermore, a first step is formed between the interior and the three-dimensional flange, the lid can be tightly embedded in the first step, and the lid is provided with a insert that can be inserted into a notch provided at the top of the box.
[0009] Furthermore, the outer edge is a straight edge; or the outer edge is a straight edge with an inward folded edge.
[0010] Furthermore, the lid has a flat, crease-free surface, and the left and right lengths of the flat lid are greater than or equal to the left and right lengths of the box body, so that the flat lid can completely cover the top of the box body.
[0011] Furthermore, the outer side is a straight edge with an inwardly folded edge, the end of which abuts against the side portion.
[0012] Furthermore, the box body is fixed with dividers inside, which divide the box body into two, three, four, or five compartments.
[0013] Furthermore, a protrusion is provided around the edge of the box cover, and a second step is formed between the outer surface and the three-dimensional flange, and the protrusion is tightly engaged with the second step.
[0014] Furthermore, the bottom is octagonal.
[0015] The beneficial effects of this utility model are as follows:
[0016] The top consists of an inner, middle, and outer section, with a smooth, flat inner surface and a three-dimensional flange in the middle section. One end of the outer section is integrally connected to the middle section. This three-dimensional flange, especially in the middle section, enhances the stiffness and edge strength of the entire paper container, making it less prone to deformation. It also improves aesthetics, allows for thinner paper sheets, saving materials, reducing costs, and effectively meeting the high-quality requirements of takeaway catering containers. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 This is a three-dimensional structural diagram of a lunchbox in the background art.
[0019] Figure 2 This is a three-dimensional structural diagram of a lunchbox with a flange on the top, as described in Example 1.
[0020] Figure 3 This is a partial cross-sectional view of the lunchbox in Example 1.
[0021] Figure 4 This is a three-dimensional structural diagram of a lunchbox with a flange on the top, as shown in Embodiment 2.
[0022] Figure 5 This is a three-dimensional structural diagram of a lunchbox with a flange on the top, as shown in Example 3.
[0023] Figure 6 This is a three-dimensional structural diagram of a lunchbox with a flange on the top, as shown in Example 4.
[0024] Figure 7 This is a three-dimensional structural diagram of a lunchbox with a flange on the top, as shown in Example 5.
[0025] Figure 8 This is a three-dimensional structural diagram of a lunchbox with a flange on the top, as shown in Example 6.
[0026] Figure 9 This is a three-dimensional structural diagram of a lunchbox with a flange on the top, as shown in Example 7.
[0027] Figure 10 This is a partial cross-sectional view of the lunchbox in Example 8.
[0028] Figure 11 This is a partial cross-sectional view of the lunchbox in Example 9.
[0029] Figure 12 This is a three-dimensional structural diagram of a lunchbox with a flange on the top, as described in Example 10.
[0030] Figure 13 This is a three-dimensional structural diagram of a lunchbox with a flange on the top, as described in Example 11.
[0031] Figure 14 This is a three-dimensional structural diagram of a lunchbox with a flange on the top, as shown in Example 12.
[0032] The serial numbers and their corresponding features in the figure are as follows:
[0033] 10-Box body; 20-Box lid; 11-Bottom; 12-Side; 13-Top; 14-Interior; 15-Middle; 16-Exterior; 17-Folded edge; 181-First step; 182-Second step; 3-Separator; 41-Top of first side; 42-Top of second side; 43-Top of third side; 44-Top of fourth side; 45-Extension; 21-Insert piece; 19-Notch; 22-Protrusion. Detailed Implementation
[0034] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1
[0035] See Figures 2-3As shown, a lunchbox with a flange on the top includes a box body 10 and a lid 20. One side of the lid 20 is connected to the box body 10 by a fold that allows it to close properly. The box body 10 includes a bottom 11, a side 12, and a top 13. The side 12 surrounds the bottom 11 to form an accommodating space, and the top 12 surrounds the side 11. The top 13 of the box body 10 includes an interior 14, a middle part 15, and an exterior 16. The interior 14 is a transitional plane, and the middle part 15 has a three-dimensional flange. One end of the exterior 16 is integrally connected to the middle part 15.
[0036] The cross-sectional shape of the three-dimensional flange can be square, trapezoidal, or semi-circular. In this embodiment, the three-dimensional flange is square.
[0037] In this embodiment, the outer edge 16 of the top 13 is a straight edge.
[0038] Because the top 13 of the box body 10 includes an inner part 14, a middle part 15, and an outer part 16, the inner part 14 is a transitional flat surface, the middle part 15 is provided with a three-dimensional flange, and one end of the outer part 16 is integrally connected to the middle part 15, this top, especially the three-dimensional flange provided in the middle part 15, can enhance the stiffness and edge strength of the entire paper container, making it less prone to deformation. It also increases aesthetics, allowing for thinner paper sheets, thereby saving materials, reducing costs, and effectively meeting the high-quality requirements of takeaway catering for food containers. Example 2
[0039] Referring to Example 1, the difference from Example 1 is that... Figure 4 As shown, in this embodiment, the side and top are integrally connected to form a side top, which is divided into a first side top 41, a second side top 42, a third side top 43, and a fourth side top 44. Extensions 45 are provided on the first side top 41 and the third side top 43, and the extensions 45 are pressed and fixed to the back of adjacent side tops. The extensions are provided to increase the connection strength of the box edge. Example 3
[0040] Referring to Example 1, the difference from Example 1 is that... Figure 5 As shown, the lid of this embodiment has a flat lid without creases. The left and right length of the flat lid is greater than or equal to the left and right length of the box body, so that the flat lid can completely cover the top of the box body. This makes the lid look more aesthetically pleasing when closed.
[0041] Example 4
[0042] Referring to Example 2, the difference from Example 2 is that... Figure 6 As shown, the box body of this embodiment is fixed with a divider 3 inside, which divides the box body 10 into multiple compartments, such as two, three, four or five compartments, etc. In this embodiment, the divider 3 divides the box body 10 into two compartments, and this embodiment is a two-compartment lunch box. Example 5
[0043] Referring to Example 3, the difference from Example 3 is that... Figure 7 As shown, the box body in this embodiment has a fixed divider 3 inside, which divides the box body 10 into 4 compartments. This embodiment is a four-compartment lunch box. This allows for better separation of food. Example 6
[0044] Referring to Example 1, the difference from Example 1 is that... Figure 8 As shown, in this embodiment, a first step 181 is formed between the inner part 14 and the three-dimensional flange. The lid 20 can be tightly embedded in the first step 181, and the lid is provided with an insert 21, which can be inserted into the notch 19 provided on the top of the box. This makes the lid fastening effect better and the lid simpler. Example 7
[0045] Referring to Example 3, the difference from Example 3 is that... Figure 9 As shown, the box body of this embodiment has a fixed divider 3 inside, which divides the box body 10 into multiple compartments, such as two, three, four, or five compartments. This embodiment is a four-compartment lunch box. In this way, the food can be separated more effectively. Example 8
[0046] Referring to Example 1, the difference from Example 1 is that... Figure 10 As shown, in this embodiment, the outer edge 16 is a straight edge with an inwardly folded edge 17. The folded edge and the straight edge overlap and are pressed together. Example 9
[0047] Referring to Example 1, the difference from Example 1 is that... Figure 11 As shown, in this embodiment, the outer edge 16 is a straight edge with an inwardly folded edge 17, the end of which abuts against the side portion 12. A portion of the folded edge overlaps and presses against the straight edge, and another portion of the folded edge overlaps and presses against the inner edge. Example 10
[0048] Referring to Example 3, the difference from Example 3 is that... Figure 12 As shown, a protrusion 22 is provided around the edge of the lid 20, and a second step 182 is formed between the outer part 16 and the three-dimensional flange. The protrusion 22 and the second step 182 are tightly engaged. This ensures a good fastening effect for the lid. Example 11
[0049] Referring to Example 1, the difference from Example 1 is that... Figure 13 As shown, the bottom of the box in this embodiment is octagonal, and this lunchbox can be called an octagonal lunchbox. Example 12
[0050] Referring to Example 4, the difference is that, see Example 4, see... Figure 14 As shown, the box body of this embodiment is fixed with a partition strip 3 inside, which divides the box body 10 into two compartments. This embodiment is a two-compartment lunch box.
[0051] The detailed descriptions listed above are merely specific descriptions of feasible embodiments of the present utility model, and are not intended to limit the scope of protection of the present utility model. All equivalent embodiments or modifications made without departing from the spirit of the present utility model should be included within the scope of protection of the present utility model.
Claims
1. A paper lunch box with a flange on the top, characterized in that, It includes a box body and a box lid. One side of the box lid is connected to the box body by a fold, and the box body includes a bottom, a side, and a top. The side is arranged around the bottom to form an accommodating space, and the top is arranged around the side. The top of the box body includes an interior, a middle, and an exterior. The interior is a transitional plane, and the middle is provided with a three-dimensional flange. One end of the exterior is integrally connected to the middle.
2. The paper lunch box with a flanged top according to claim 1, characterized in that, The cross-sectional shape of the three-dimensional flange is square, trapezoidal, or semi-circular.
3. The paper lunch box with a flange at the top according to claim 1, characterized in that, The side and the top are integrally connected to form a side top. The side top is divided into a first side top, a second side top, a third side top, and a fourth side top. Extensions are provided on the first side top and the third side top. The extensions are pressed and fixed to the outer surface of the adjacent side tops.
4. The paper lunch box with a flange at the top according to claim 1, characterized in that, A first step is formed between the interior and the three-dimensional flange. The box cover can be tightly embedded in the first step, and the box cover is provided with a insert that can be inserted into a notch provided at the top of the box.
5. The paper lunch box with a flanged top according to claim 1, characterized in that, The outer edge is a straight edge; or the outer edge is a straight edge with an inward folded edge.
6. The paper lunch box with a flanged top according to claim 1, characterized in that, The lid has a flat, crease-free surface, and the left and right lengths of the flat lid are greater than or equal to the left and right lengths of the box body, so that the flat lid can completely cover the top of the box body.
7. The paper lunch box with a flanged top according to claim 1, characterized in that, The outer side is a straight edge with an inward folded edge, the end of which abuts against the side portion.
8. The paper lunch box with a flanged top according to claim 1, characterized in that, The box is fixed with dividers inside, which divide the box into two, three, four or five compartments.
9. The paper lunch box with a flanged top according to claim 4, characterized in that, A protrusion is provided around the edge of the box cover, and a second step is formed between the outer surface and the three-dimensional flange. The protrusion is tightly engaged with the second step.
10. The paper lunch box with a flanged top according to claim 1, characterized in that, The bottom is octagonal.