Self-adaptive locking corrugated carton

Abstract

The invention discloses a self-adaptive locking corrugated carton, which relates to the technical field of transportation articles and comprises a rear paperboard, a right paperboard, a front paperboard and a left paperboard which are connected in sequence, the bottom of the tubular box body extends to be provided with a lower cover assembly; the lower covering set comprises a first lower cover laminated plate and a second lower cover laminated plate which are connected to the bottom edge of the rear paperboard and the bottom edge of the front paperboard respectively. Main bodies of the first lower cover laminated plate and the second lower cover laminated plate are in a two-layer step shape, a first L-shaped line and a second L-shaped line are arranged on the plate face of the first lower cover laminated plate and the plate face of the second lower cover laminated plate respectively, the first L-shaped line and the second L-shaped line are middle step lines, and the first L-shaped line divides the first lower cover laminated plate into a first exposed part and a first inward extending part which are connected with each other in the vertical direction. The second L-shaped line divides the second lower cover laminated plate into a second inward extending part and a second exposed part which are connected with each other. And the bottom leakage risk in heavy-load transportation is effectively reduced.

Description

Technical Field

[0001] This invention relates to the field of transportation supplies technology, specifically to an adaptive locking corrugated cardboard box. Background Technology

[0002] Traditional slotted cardboard boxes heavily rely on BOPP plastic tape for sealing the bottom and top. This not only introduces non-degradable plastic pollution and increases energy consumption and costs in separating plastic from paper during waste paper recycling, but also makes sealing efficiency highly dependent on manual skill. To address these issues, various "tape-free" or "zipper-sealed" cardboard boxes have emerged in the market. However, in actual high-intensity logistics transportation scenarios, existing tape-free cardboard box structures have gradually revealed core problems such as poor adaptability and unreliable locking, hindering their further promotion in heavy-duty packaging and automated packaging lines.

[0003] Specifically, most existing self-locking bottom structures adopt a simple "diagonal folding traction" principle, that is, using the unfolding of the side panels to drive the bottom panel to return to its original position. However, the bottom panels often rely solely on simple edge overlap or friction to maintain closure. When the box is loaded with heavy items (such as liquid beverages or hardware accessories) or encounters drop impacts during transportation, the bottom center experiences the greatest force, and the lack of an effective geometric interlocking mechanism easily leads to the bottom cardboard arching outward, gaps widening, or even bursting open (the so-called bottom leakage phenomenon), failing to meet the needs of heavy-duty packaging. Summary of the Invention

[0004] To address the aforementioned problems, this invention proposes an adaptive locking corrugated cardboard box, comprising a rear cardboard, a right cardboard, a front cardboard, and a left cardboard connected in sequence; a lower cover assembly extends from the bottom of the tubular box body; the lower cover assembly includes a lower cover overlapping plate one and a lower cover overlapping plate two connected to the bottom edges of the rear cardboard and the front cardboard, respectively; the main bodies of the lower cover overlapping plate one and the lower cover overlapping plate two are in a two-layer stepped shape, and L-shaped lines one and two are respectively provided on the surface of the lower cover overlapping plate one and the lower cover overlapping plate two, which are middle stepped lines; L-shaped line one divides the lower cover overlapping plate one into an exposed part one and an inner extension part one connected to each other; L-shaped line two divides the lower cover overlapping plate two into an inner extension part two and an exposed part two connected to each other.

[0005] Furthermore, L-shaped line one and L-shaped line two are composed of a short side extending along the width direction and a long side extending along the length direction; the long side of L-shaped line one and L-shaped line two are discontinuous cut lines that do not penetrate through, and the ends of the long sides do not extend to the side edges of the lower cover composite plate one and the lower cover composite plate two, respectively, so as to maintain the connection relationship between the inner extension part one and the exposed part one, and between the inner extension part two and the exposed part two.

[0006] Furthermore, the lower cover assembly is configured with a linkage locking structure. The distance between the top long side of the lower cover overlapping plate 1 and the lower cover overlapping plate 2 and the bottom of the short side of the L-shaped line 1 and L-shaped line 2 is 1 / 2A, respectively. The bottom edge length of the left cardboard and the right cardboard is A. When in the assembly state, the lower cover side plate 1 and the lower cover side plate 2 move towards the center of the box through the inner extension part 1 and the inner extension part 2, respectively, and overlap. The inner extension part 1 and the inner extension part 2 extend into the lower part of the exposed part 2 and the exposed part 1, respectively, until the L-shaped line 1 and the L-shaped line 2 abut to form a straight line, and the whole form a locked bottom surface of the box.

[0007] Furthermore, the lower cover assembly also includes a lower cover side plate one and a lower cover side plate two connected to the bottom edges of the right cardboard and the left cardboard, respectively. One side edge of the lower cover side plate one and the lower cover side plate two are respectively provided with adhesive flap one and adhesive flap two. Adhesive flap one is glued and fixed to the surface of lower cover side plate one, and adhesive flap two is glued and fixed to the surface of lower cover side plate two.

[0008] Furthermore, the first and second adhesive flaps are connected to the long sides of the first and second L-shaped lines, respectively. The inner sides of the first and second adhesive flaps are provided with second creases so that the lower cover assembly can be folded into the box along the second creases of the first and second adhesive flaps, thus achieving integrated flat storage of the box.

[0009] Furthermore, it also includes a top cover assembly, which includes a lower top cover plate connected to the top of the rear cardboard, a top top cover plate connected to the top of the front cardboard, and inner lining hinge one and inner lining hinge two respectively connected to the top of the right cardboard and the left cardboard.

[0010] Furthermore, a slot is provided on the upper cover and lower sealing plate; the upper cover and upper sealing plate are provided with a foldable upper fold and a side fold at the end away from the front cardboard; a first fold is provided horizontally between the upper fold and the main body of the upper cover and upper sealing plate, and a first crease is provided between the side fold and the upper fold; the upper fold can be folded up through the first fold to overlap with the side fold, and the upper fold and the side fold as a whole can be folded sideways along the first crease; the side fold is configured to be held in the slot by the spring force of the upper fold and the side fold after being inserted into the slot.

[0011] Furthermore, the inner hinge 1 has a connecting cavity 1 in the middle, and the inner hinge 2 has a connecting cavity 2 in the middle; when the upper cover is closed, the inner hinge 1 and the inner hinge 2 fold inward first, the lower cover plate covers them, the upper cover plate covers the lower cover plate, and after the upper fold and the side fold pass through the slot, the upper fold and the side fold at both ends pass through the connecting cavity 1 and the connecting cavity 2 respectively and enter the internal space of the box.

[0012] Furthermore, it also includes a molding and pasting part connected to the side of the left cardboard. The rear cardboard, right cardboard, front cardboard, left cardboard and molding and pasting part are glued together end to end to form the box body. The upper part of the front cardboard is provided with a tear-off part with a break-point cut. The tear-off part is an arc-shaped break-point cut line that extends to the top edge of the front cardboard at both ends for opening the box body.

[0013] Furthermore, the entire carton is die-cut from a single sheet of corrugated cardboard.

[0014] The beneficial effects of this invention are as follows: 1. A high-strength interlocking structure is constructed by designing a special structure on the lower cover composite plate. Lower cover composite plates one and two move towards the center, and inner extensions one and two interlock like interlaced fingers. When a heavy object is placed inside the box, the downward force is converted into a force pressing against the bottom plate, making the two interlocking inner extensions mesh even tighter. The collinear alignment of the short sides of L-shaped lines one and two not only effectively ensures the flatness of the bottom but also forms a stable planar truss structure, effectively reducing the risk of bottom leakage during heavy-load transportation.

[0015] 2. The top cover features a combination of an upper fold and a side fold. During use, the user folds the upper fold upwards, causing the side fold to fold as well. When the locking mechanism is pressed into the slot and passes through the connecting cavity into the box, the side fold, which was originally forcibly folded and compressed, will attempt to return to its original shape (i.e., expand outwards) due to the elastic memory of the corrugated cardboard, effectively preventing accidental opening of the lid and improving cargo security. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the front structure of the invention when unfolded; Figure 2 This is a schematic diagram of the rear structure of the present invention when unfolded; Figure 3 This is a schematic diagram of the bottom structure of the assembled cardboard box; Figure 4 This is a schematic diagram of the top structure of the assembled cardboard box.

[0017] The reference numerals in the attached drawings are explained as follows: 1. Rear cardboard; 2. Right cardboard; 3. Front cardboard; 31. Tear-off section; 4. Left cardboard; 5. Forming and pasting section; 6. Top cover assembly; 61. Inner lining hinge one; 611. Connecting cavity one; 62. Lower cover sealing plate; 621. Slot; 63. Upper cover sealing plate; 631. Upper fold; 632. Side fold; 64. Inner lining hinge two; 641. Connecting cavity two; 7. Lower cover assembly; 71. Lower cover side plate one; 72. Lower cover overlapping plate one; 721. Pasted hinge one; 722. L-shaped line one; 723. Inner extension one; 724. Exposed part one; 73. Lower cover side plate two; 74. Lower cover overlapping plate two; 741. Pasted hinge two; 742. L-shaped line two; 743. Inner extension two; 744. Exposed part two. Detailed Implementation

[0018] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0019] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0020] The present invention will be further described below with reference to the accompanying drawings: Example 1

[0021] Adaptive locking: An adaptive locking corrugated cardboard box, such as Figure 1 , Figure 2 and Figure 3As shown, the package includes a rear cardboard 1, a right cardboard 2, a front cardboard 3, and a left cardboard 4 connected in sequence; a lower cover assembly 7 extends from the bottom of the tubular box body; the lower cover assembly 7 includes a lower cover overlapping plate 1 72 and a lower cover overlapping plate 2 74 respectively connected to the bottom edges of the rear cardboard 1 and the front cardboard 3; the main body of the lower cover overlapping plate 1 72 and the lower cover overlapping plate 2 74 is in the shape of two-layer steps, and L-shaped lines 1 722 and 2 742 are respectively provided on the surface of the lower cover overlapping plate 1 72 and the lower cover overlapping plate 2 74. The L-shaped lines 1 722 and 2 742 are the middle steps. The L-shaped line 1 722 divides the lower cover overlapping plate 1 72 into an exposed part 1 724 and an inner extension part 1 723 connected to each other; the L-shaped line 2 742 divides the lower cover overlapping plate 2 74 into an inner extension part 2 743 and an exposed part 2 744 connected to each other.

[0022] In this embodiment, L-shaped line 1 722 and L-shaped line 2 742 are composed of a short side extending along the width direction and a long side extending along the length direction; the long side of L-shaped line 1 722 and L-shaped line 2 742 are discontinuous cut lines that do not penetrate through, so as to maintain the connection relationship between inner extension 1 723 and exposed extension 1 724, and inner extension 2 743 and exposed extension 2 744.

[0023] In this embodiment, the lower cover assembly 7 is configured as a linkage locking structure. The distance between the top long side of the lower cover overlapping plate 1 72 and the lower cover overlapping plate 2 74 and the bottom of the short side of the L-shaped line 1 722 and the L-shaped line 2 742 is 1 / 2A, and the bottom edge length of the left cardboard 4 and the right cardboard 2 is A. When in the assembly state, the lower cover side plate 1 71 and the lower cover side plate 2 73 move toward the center of the box through the inner extension 1 723 and the inner extension 2 743 and overlap. The inner extension 1 723 and the inner extension 2 743 extend into the inner side of the exposed part 2 744 and the exposed part 1 724 respectively, until the L-shaped line 1 722 and the L-shaped line 2 742 abut to form a straight line, and the whole forms a locked bottom surface of the box.

[0024] Example 2 Flat storage: like Figure 1 , Figure 2 and Figure 3 As shown, based on the above embodiment 1, this embodiment optimizes some aspects of the lower cover assembly 7: the lower cover assembly 7 also includes a lower cover side plate 1 71 and a lower cover side plate 2 73 respectively connected to the bottom edges of the right cardboard 2 and the left cardboard 4. One side edge of the lower cover overlapping plate 1 72 and the lower cover overlapping plate 2 74 is respectively provided with a first adhesive flap 721 and a second adhesive flap 741. The first adhesive flap 721 is glued and fixed to the surface of the lower cover side plate 1 71, and the second adhesive flap 741 is glued and fixed to the surface of the lower cover side plate 2 73.

[0025] The first adhesive flap 721 and the second adhesive flap 741 are connected to the long side ends of the first L-shaped line 722 and the second L-shaped line 742, respectively. The inner side of the first adhesive flap 721 and the second adhesive flap 741 is provided with a second crease so that the lower cover assembly 7 can be folded into the box along the second crease of the first adhesive flap 721 and the second adhesive flap 741, so as to realize the integrated flat storage of the box.

[0026] Example 3 Top closing and opening: like Figure 1 , Figure 2 and Figure 4 As shown, this embodiment optimizes the top structure of the carton based on any of the above embodiments: it also includes a top cover assembly 6, which includes a top cover lower sealing plate 62 connected to the top of the rear cardboard 1, a top cover upper sealing plate 63 connected to the top of the front cardboard 3, and inner lining hinge 1 61 and inner lining hinge 2 64 respectively connected to the top of the right cardboard 2 and the left cardboard 4. The upper cover lower sealing plate 62 has a slot 621. The upper cover upper sealing plate 63 has a foldable upper fold 631 and a side fold 632 at the end away from the front cardboard 3. The upper fold 631 and the upper cover upper sealing plate 63 have a first fold opening in the horizontal direction. The side fold 632 and the upper fold 631 have a first crease. The upper fold 631 can be folded up through the first fold opening to overlap with the side fold 632. The upper fold 631 and the side fold 632 can be folded sideways along the first crease. The side fold 632 is configured to be held in the slot 621 by the spring force of the upper fold 631 and the side fold 632 after being inserted into the slot 621.

[0027] In this embodiment, the middle of the first lining hinge is provided with a connecting cavity 611, and the middle of the second lining hinge 64 is provided with a connecting cavity 641. When the upper cover assembly 6 is closed, the first lining hinge 61 and the second lining hinge 64 fold inward first, and the lower cover plate 62 covers them. The upper cover plate 63 covers the lower cover plate 62. After the upper folding part 631 and the side folding part 632 pass through the slot 621, the upper folding part 631 and the side folding part 632 at both ends pass through the connecting cavity 611 and the connecting cavity 641 respectively and enter the internal space of the box.

[0028] Example 4 One-piece molding: like Figure 1 and Figure 2 As shown, based on any of the above embodiments, the overall structure of the carton is optimized: the carton is integrally die-cut from a single sheet of corrugated cardboard, and also includes a forming and pasting part 5 connected to the side of the left cardboard 4. The rear cardboard 1, right cardboard 2, front cardboard 3, left cardboard 4 and forming and pasting part 5 are glued together end to end to form the box body. The forming and pasting part 5 is glued and fixed to the surface of the rear cardboard 1, so that the four cardboards are enclosed to form a foldable tubular box structure.

[0029] The upper part of the front cardboard 3 is provided with a tear-off section 31 with a break-point cut. The tear-off section 31 is an arc-shaped break-point cut line that extends to the top edge of the front cardboard 3 at both ends, and is used to open the box.

[0030] The working principle of this invention is as follows: During the bottom locking stage, when the box unfolds from its flat storage state, the operator first surrounds the rear cardboard 1, right cardboard 2, front cardboard 3, and left cardboard 4 to form a rectangular cylinder, and then fixes it by adhesive bonding part 5.

[0031] Then, the bottom sealing operation is performed. Lower cover side panel 1 (71) and lower cover side panel 2 (73) are folded inwards towards the center of the box along the edge creases. Hinges 1 (721) and 71, and 741 and 73 are glued together. Due to the fixed connection between 721 and 71, and 741 and 73, lower cover overlapping panels 1 (72) and 74 (74) are moved in tandem. Under the action of horizontal thrust, the inner extensions 723 and 743 of lower cover overlapping panels 1 (72) and 74 (74) move towards the centerline of the box along L-shaped lines 722 and 742, respectively. Because the two laminated plates have a stepped structure and the long side of the L-shaped line has a discontinuous cut, the inner extension 723 can be smoothly inserted below the exposed extension 744, and the inner extension 743 can be inserted below the exposed extension 724, forming an interlocking stacked structure.

[0032] As the insertion depth increases, the long side ends of L-shaped line 1 722 and L-shaped line 2 742 gradually approach each other until they abut to form a continuous straight line. They are then restrained by their respective ends and cannot slide off in the opposite direction, thus forming a stable box bottom surface through the interlocking structure of the cardboard itself. During this process, because the distance between the top long sides of the lower cover plate 1 72 and the lower cover plate 2 74 and the bottom of the short sides of L-shaped line 1 722 and L-shaped line 2 742 is 1 / 2A, and the bottom edge lengths of the left cardboard 4 and the right cardboard 2 are A, the force on the bottom surface is evenly distributed, achieving self-adaptive locking without the need for any tape or staples.

[0033] During the top sealing stage, inner lining hinge 1 61 and inner lining hinge 2 64 are first folded inwards to attach them to the inner sidewall of the top opening of the box, forming an inner lining reinforcement structure. Then, the lower cover plate 62 is folded downwards to cover the inner lining hinges, followed by the upper cover plate 63 being folded downwards so that its main body covers the lower cover plate 62. Before closing, the upper fold 631 is folded upwards along the first fold to overlap with the side fold 632, and then the overlapping portion is folded sideways along the first fold to form a latch structure. When the latch is inserted into the slot 621, the upper fold 631 and the side fold 632 undergo elastic deformation during folding and tend to return to their original shape. After insertion, they generate a lateral expansion force within the slot 621, causing the two ends of the side fold 632 to be respectively engaged with the two sides of the slot 621. At the same time, the side folding parts 632 and the upper folding parts 631 on both sides pass through the connecting cavity 611 on the inner lining hinge 61 and the connecting cavity 641 on the inner lining hinge 64, respectively, and enter the internal space of the box to form a locking structure.

[0034] During the storage phase, when the cardboard box needs to be recycled and stored, the lower cover side panel 1 71 and the lower cover side panel 2 73 can be unfolded outwards, causing the lower cover overlapping panel 1 72 and the lower cover overlapping panel 2 74 to fold inwards along the second crease, so that the entire bottom structure is flat and fits against the inner wall of the side panel, and the box returns to a flat shape, which is convenient for stacking and transportation.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. An adaptive locking corrugated cardboard box, comprising a rear cardboard (1), a right cardboard (2), a front cardboard (3), and a left cardboard (4) connected in sequence; characterized in that: It also includes a lower cover assembly (7), which includes a lower cover laminate plate one (72) and a lower cover laminate plate two (74) respectively connected to the bottom edges of the rear cardboard (1) and the front cardboard (3); the lower cover laminate plate one (72) and the lower cover laminate plate two (74) are mainly in the form of two-layer steps, and L-shaped lines one (722) and L-shaped lines are respectively provided on the surface of the lower cover laminate plate one (72) and the lower cover laminate plate two (74). Second (742), L-shaped line one (722) and L-shaped line two (742) are middle stepped lines. L-shaped line one (722) divides the lower cover composite plate one (72) into an exposed part one (724) and an inner extension one (723) that are connected to each other. L-shaped line two (742) divides the lower cover composite plate two (74) into an inner extension two (743) and an exposed part two (744) that are connected to each other.

2. The adaptive locking corrugated cardboard box according to claim 1, characterized in that: The L-shaped line one (722) and L-shaped line two (742) are composed of a short side extending along the width direction and a long side extending along the length direction; the long side of the L-shaped line one (722) and L-shaped line two (742) is a discontinuous cut line that does not penetrate through, and the end of the long side does not extend to the side edge of the lower cover composite plate one (72) and the lower cover composite plate two (74), respectively, so as to maintain the connection relationship between the inner extension one (723) and the exposed part one (724), and the inner extension two (743) and the exposed part two (744).

3. The adaptive locking corrugated cardboard box according to claim 2, characterized in that: The lower cover assembly (7) is configured with a linkage locking structure. The lower cover assembly (7) also includes a lower cover side plate one (71) and a lower cover side plate two (73) respectively connected to the bottom edges of the right cardboard (2) and the left cardboard (4). The distance between the top long side of the lower cover overlapping plate one (72) and the bottom of the short side of the L-shaped line one (722) and the L-shaped line two (742) is 1 / 2A. The bottom edge lengths of the left cardboard (4) and the right cardboard (2) are... A; When in the assembly state, the lower cover side plate one (71) and the lower cover side plate two (73) move toward the center of the box through the inner extension one (723) and the inner extension two (743) respectively and overlap. The inner extension one (723) and the inner extension two (743) extend into the lower part of the exposed part two (744) and the exposed part one (724) respectively, until the L-shaped line one (722) and the L-shaped line two (742) abut to form a straight line, and the whole form a locked bottom surface of the box.

4. The adaptive locking corrugated cardboard box according to claim 3, characterized in that: The lower cover composite plate one (72) and the lower cover composite plate two (74) are respectively provided with adhesive flap one (721) and adhesive flap two (741) extending from one side edge. Adhesive flap one (721) is glued and fixed to the surface of the lower cover side plate one (71), and adhesive flap two (741) is glued and fixed to the surface of the lower cover side plate two (73).

5. The adaptive locking corrugated cardboard box according to claim 4, characterized in that: The first adhesive flap (721) and the second adhesive flap (741) are connected to the long side ends of the first L-shaped line (722) and the second L-shaped line (742) respectively. The inner side of the first adhesive flap (721) and the second adhesive flap (741) is provided with a second crease so that the lower cover assembly (7) can be folded into the box along the second crease of the first adhesive flap (721) and the second adhesive flap (741) to achieve integrated flat storage of the box.

6. The adaptive locking corrugated cardboard box according to claim 1, characterized in that: It also includes a top cover assembly (6), which includes a top cover lower sealing plate (62) connected to the top of the rear cardboard (1), a top cover upper sealing plate (63) connected to the top of the front cardboard (3), and inner lining hinge one (61) and inner lining hinge two (64) respectively connected to the top of the right cardboard (2) and the left cardboard (4).

7. The adaptive locking corrugated cardboard box according to claim 6, characterized in that: The upper cover lower sealing plate (62) is provided with a slot (621); the upper cover upper sealing plate (63) away from the front cardboard (3) is provided with a foldable upper fold (631) and a side fold (632) in sequence; a first fold opening is provided between the upper fold (631) and the main body of the upper cover upper sealing plate (63), and a first crease is provided between the side fold (632) and the upper fold (631). The upper fold (631) can be folded up through the first fold opening to overlap with the side fold (632), and the upper fold (631) and the side fold (632) as a whole can be folded along the first crease; the side fold (632) is configured to be held in the slot (621) by the spring force of the upper fold (631) and the side fold (632) after being inserted into the slot (621).

8. The adaptive locking corrugated cardboard box according to claim 7, characterized in that: The inner lining hinge 1 (61) has a connecting cavity 1 (611) in the middle, and the inner lining hinge 2 (641) has a connecting cavity 2 (641) in the middle. When the upper cover assembly (6) is closed, the inner lining hinge 1 (61) and the inner lining hinge 2 (64) fold inward first, the lower cover plate (62) covers it, the upper cover plate (63) covers the lower cover plate (62), the upper fold (631) and the side fold (632) pass through the slot (621), and the upper fold (631) and the side fold (632) at both ends pass through the connecting cavity 1 (611) and the connecting cavity 2 (641) respectively to enter the internal space of the box.

9. The adaptive locking corrugated cardboard box according to claim 1, characterized in that: It also includes a molding and pasting part (5) connected to the side of the left cardboard (4). The rear cardboard (1), right cardboard (2), front cardboard (3), left cardboard (4) and molding and pasting part (5) are glued together end to end to form a box. The upper part of the front cardboard (3) is provided with a tear-off part (31) with a break-point cut. The tear-off part (31) is an arc-shaped break-point cut line that extends to the top edge of the front cardboard (3) at both ends for opening the box.

10. An adaptive locking corrugated cardboard box according to any one of claims 1 to 9, characterized in that: The carton is formed by die-cutting a single sheet of corrugated cardboard.

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