Full-length locking paper lunch box

Abstract

This invention provides a fully locking paper lunch box, comprising a box body consisting of a bottom, four sides, and corners, and a lid pivotally connected to the rear side of the box body. The front side of the box body has a T-shaped fastening part, and the corners have locking blocks. The lid has front, left, and right wings, and correspondingly has positioning grooves formed by slots and first and second folding pieces, as well as first and second locking slots. The key feature is that a tear line is provided between the front wing and the lid to achieve destructive opening. Through the interlocking reaction of the T-shaped fastening part and the positioning grooves, combined with the three-way self-locking mechanism of the locking blocks and side locking slots, not only is the sealing stability and anti-counterfeiting security of the lunch box improved, but it also achieves the technical effects of sealing without auxiliary parts and full paper recycling.

Claims

1. A fully locking paper lunch box, comprising a box body (1) and a lid (2) foldable and fits onto the box body (1); the box body (1) is a paper container having a bottom surface (11), a left side surface (12), a right side surface (13), a front side surface (14), and a rear side surface (15) extending sequentially upward from the left, right, front, and rear edges of the bottom surface (11), and several corner portions (16) respectively disposed at each corner; one side of the lid (2) is pivotally connected to the corresponding side of the rear side surface (15); the bottom surface (11) and the left, right, front, and rear sides (12, 13, 14, 15) define an accommodating space (10), and the top of the accommodating space (10) has an opening (20) that can be closed by the lid (2); characterized in that: At the center of the top edge of the front side (14), a T-shaped fastening part (3) is provided; one side of the corner part (16) is closely attached to one of the corresponding left side (12) and right side (13), and a locking block (161) is provided at the top of the free side; a front wing (21), a left wing (22) and a right wing (23) are respectively provided at the front, left and right edges of the cover (2); a positioning groove (4) is cut at the fastening part (3) corresponding to the cover (2), and the positioning groove (4) has a slot (41), a first folding piece (42) and a second folding piece (43) formed by cutting; the slot (41) is T-shaped, the horizontal section is away from the front wing (21), and the vertical section extends from the cover (2) to the front wing (21); The first folding piece (42) is located within the longitudinal section of the slot (41), with one end pivotally connected to the front wing (21), and the free end adjacent to the transverse section of the slot (41); The second folding piece (43) is located within the transverse section of the slot (41), with one end pivotally connected to the cover (2), and the other end connected to the free end of the first folding piece (42); The pivot joint between the front wing (21) and the cover (2) is a tear line (5); A first slot (6) is cut at the pivot joint between the cover (2) and the left wing (22) corresponding to the slot (161); A second slot (7) is cut at the pivot joint between the cover (2) and the right wing (23) corresponding to the slot (161); The first slot (6) has a left slot (61) formed by cutting and a left folding piece (62). The left slot (61) extends from the left wing piece (22) to the cover (2). One side of the left folding piece (62) is engaged with the left slot (61) and the other side is connected to the left wing piece (22).The second slot (7) has a right slot (71) formed by cutting and a right folding piece (72). The right slot (71) extends from the right wing piece (23) to the cover (2). One side of the right folding piece (72) is engaged with the right slot (71), and the other side is connected to the right wing piece (23).

2. The all-around locking paper lunch box as described in claim 1, wherein: Each corner portion (16) has a first sector piece (162) and a second sector piece (163) arranged adjacent to each other; each locking block (161) has a first locking block portion (164) arranged adjacent to each other on the first sector piece (162) and a second locking block portion (165) arranged on the second sector piece (163).

3. The all-around locking paper lunch box as described in claim 2, wherein: At the two corners where the longitudinal and transverse sections of the slot (41) connect, a chamfer (44) is provided to reduce the resistance when the vertical section of the fastening part (3) is inserted into the slot (41).

4. The all-around locking paper lunch box as described in claim 3, wherein: On both sides of the bottom end of the fastening part (3), a recessed part (31) is provided respectively.

5. The all-around locking paper lunch box as described in claim 4, wherein: The top surface of the cover (2) is provided with a detachable block (8). The detachable block (8) has cutting lines (81) at both ends and seam lines (82) on both sides, so that the detachable block (8) can be removed from the cover (2). The detachable block (8) has two spaced preset indentations (83) inside, so that after the detachable block (8) is removed, it can be bent along the preset indentations (83) to form a U-shaped fork (30). The cover (2) is located in front of the detachable block (8) and has a hole (84) cut in front of it. A folding blade (85) extends from the periphery of the hole (84) to produce an elastic clamping and positioning effect on the inserted fork (30).

6. The all-around locking paper lunchbox as described in claim 5, wherein: The detachable block (8) is arranged in a trapezoidal shape, which is wider at one end and narrower at the other.

7. The all-around locking paper lunchbox as described in claim 6, wherein: An indicator pattern (40) is provided on the surface at one end of the width of the detachable block (8).

8. The all-around locking paper lunchbox as described in any one of claims 1 to 7, wherein: The accommodating space (10) is further provided with at least one partition (9), which can divide the accommodating space (10) into several placement blocks (101).

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