Paper lunch box with snap-fit ​​structure and paper material for folding out the paper lunch box

Abstract

A paper lunch box with a snap-fit ​​structure and paper material for folding the lunch box are disclosed, comprising a box body and a lid. The box body includes a bottom plate, two first side plates, two second side plates, four connecting plates, and a snap-fit ​​plate connected to the top edge of one of the first side plates. The bottom plate, the first side plates, and the second side plates cooperate to define an accommodating space. The lid includes a top plate connected to the top edge of the other first side plate, an eaves plate, and a folding plate. The eaves plate is inclined to the top plate and extends toward the box body. The folding plate is folded back from the eaves plate toward the top plate and is fixed to the inner side of the eaves plate, cooperating with the eaves plate to define a snap-fit ​​space. When the lid is in a closed state, the snap-fit ​​plate is detachably engaged in the snap-fit ​​space, and the lid closes the accommodating space.

Claims

1. A paper material for folding into a paper lunch box with a snap-fit ​​structure, comprising: a box body plate including a bottom plate portion, two first side plate portions connected to two opposite sides of the bottom plate portion in a front-rear direction, two second side plate portions connected to two opposite sides of the bottom plate portion in a left-right direction, four connecting plate portions connecting adjacent first side plate portions and second side plate portions, and a snap-fit ​​plate portion connected to one of the first side plate portions, wherein two first side plate portions and the bottom plate portion form two mutually spaced first side fold lines in the front-rear direction, and two second side fold lines mutually spaced in the left-right direction form two second side fold lines between the second side plate portions and the bottom plate portion, and each connecting plate portion forms a first connecting fold line with a corresponding one of the first side plate portions, and each connecting plate portion... A second connecting fold line is formed between the corresponding second side panel portion and the first side panel portion; a fastening fold line is formed between the fastening plate portion and the first side panel portion; and a cover plate, including a top plate portion connected to another first side panel portion, an eaves plate portion connected to the top plate portion and opposite to the other first side panel portion in the front-back direction, and a reverse fold plate portion connected to the eaves plate portion; a connecting fold line is formed between the top plate portion and the other first side panel portion; an eaves plate fold line is formed between the eaves plate portion and the top plate portion that is spaced apart from the connecting fold line in the front-back direction; and a reverse fold line is formed between the reverse fold plate portion and the eaves plate portion that is spaced apart from the eaves plate fold line in the front-back direction.

2. The paper material as described in claim 1 for folding out a paper lunchbox with a snap-fit ​​structure, wherein, Each connecting plate has a first corner block connected to one of the corresponding first side plates and a second corner block connected to one of the corresponding second side plates. The first connecting fold line is formed between the first corner block and the corresponding first side plate, and the second connecting fold line is formed between the second corner block and the corresponding second side plate. A middle fold line is formed between the first corner block and the second corner block. The first corner block has a first protrusion extending toward the second corner block.

3. The paper material as described in claim 2 for folding out a paper lunchbox with a snap-fit ​​structure, wherein, Each second side plate portion has a side plate main block connected to the bottom plate portion and a side plate flange block connected to the side plate main block. The second side fold lines are formed between the side plate main block of the second side plate portion and the bottom plate portion. A first flange fold line is formed between the side plate flange block and the side plate main block. The first flange fold line is spaced apart from one of the corresponding second side fold lines in the left-right direction. The second corner block has a bevel connected to the middle fold line. The bevel of the second corner block of each connecting plate portion extends to connect with the first flange fold line of one of the corresponding second side plate portions.

4. The paper material as described in claim 1 for folding out a paper lunchbox with a snap-fit ​​structure, wherein, The cover plate also includes two turning plate portions connected to the eaves portion on two opposite sides in the left-right direction. Each turning plate portion has a first turning plate connected to the reverse turning plate portion and a second turning plate connected to the first turning plate portion. The first turning plate portion and the reverse turning plate portion form a first turning line inclined to the eaves fold line. The second turning plate portion and the first turning plate portion form a second turning line. The second turning line is perpendicular to the eaves fold line.

5. The paper material as described in claim 4 for folding out a paper lunchbox with a snap-fit ​​structure, wherein, The cover plate also includes two side flange plates connected to the top plate portion on two opposite sides in the left-right direction. The side flange plates and the top plate portion form two second flange fold lines that are spaced apart from each other in the left-right direction. The second flange fold lines correspond to the second turning lines of the turning plates in the front-back direction.

6. The paper material as described in claim 1 for folding out a paper lunchbox with a snap-fit ​​structure, wherein, The folding plate has a main board area and two fixed end areas connected to the main board area and opposite to each other in the left-right direction. The main board area forms a finger-holding groove.

7. A paper lunch box with a snap-fit ​​structure, comprising: a box body including a bottom plate portion, two first side plate portions extending upwardly from two opposite sides of the bottom plate portion in a front-rear direction, two second side plate portions extending upwardly from two opposite sides of the bottom plate portion in a left-right direction, four connecting plate portions connecting adjacent first side plate portions and second side plate portions, and a snap-fit ​​plate portion connected to the top edge of one of the first side plate portions and extending forward, each connecting plate portion fixing adjacent first side plate portions and second side plate portions together, the bottom plate portion, the first side plate portions, and the second side plate portions cooperating to define an accommodating space; and a lid, including a top plate portion connected to the top edge of the other first side plate portion. The lid comprises a top plate, an eaves plate connected to the front edge of the top plate, and a folded plate connected to the front edge of the eaves plate. The eaves plate is inclined to the top plate and extends toward the box body. The folded plate is folded back from the eaves plate toward the top plate and is fixed to the inner side of the eaves plate, thus defining a fastening space. The lid can switch between an open state and a closed state relative to the box body. When the lid is in the open state, the fastening plate disengages from the fastening space, and the lid does not close the accommodating space. When the lid is in the closed state, the fastening plate is detachably engaged in the fastening space, and the lid closes the accommodating space.

8. The paper lunch box with an interlocking structure as described in claim 7, wherein, Each connecting plate has a first corner block connected to a corresponding first side plate and a second corner block connected to a corresponding second side plate. Each connecting plate is fixed to the outside of the corresponding second side plate. The second corner block is sandwiched between the first corner block and the corresponding second side plate. The first corner block has a first protrusion extending beyond the second corner block.

9. The paper lunch box with an interlocking structure as described in claim 8, wherein, Each second side plate portion has a side plate main block connected to the bottom plate portion, and a side plate flange block connected to the top edge of the side plate main block. The side plate flange block extends inward from the top edge of the side plate main block in the left-right direction. The second corner block has a bevel. The bevel of the second corner block of each connecting plate portion extends to connect with the top edge of the side plate main block of the corresponding second side plate portion.

10. The paper lunch box with an interlocking structure as described in claim 7, wherein, The cover also includes two side flange plates connected to the top plate on two opposite sides in the left-right direction, and two turning plates connected to the eaves on opposite sides in the left-right direction and the side flange plates. The side flange plates extend downward from the top plate. Each turning plate has a first turning plate connected to the eaves and a second turning plate connected to the first turning plate. The second turning plate is fixed to the outside of one of the corresponding side flange plates. The first turning plate is inclined to the corresponding side flange plate and the reverse fold plate. The first turning plates of the turning plates are inclined towards each other in the left-right direction.

11. The paper lunch box with an interlocking structure as described in claim 7, wherein, The folding plate has a main plate area and two fixed end areas connected to the main plate area and opposite to each other in the left-right direction. The main plate area forms a finger-holding groove, and the fixed end areas are fixed to the inner side of the eaves plate.

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