A folding box structure

Abstract

This utility model discloses a folding box structure, including a bottom plate, four side plates, a reinforcing plate, and a top plate. The bottom plate has four bottom edges connected end to end in sequence. Each side plate is connected to one bottom edge. Each side plate includes two side edges adjacent to the bottom edge and a top edge opposite to the bottom edge. Adjacent side plates are fixedly connected at the side edges, and the side plates can be folded relative to the bottom plate along the bottom edge. The reinforcing plate is connected to at least one side edge and can be folded along the side edge. After folding, the reinforcing plate fits against the inner or outer side of the side plate. The top plate is connected to the top edge or the reinforcing plate and can be folded along the top edge. The top plate, side plates, and bottom plate enclose a sealed or semi-sealed box space, aiming to solve the technical problem of insufficient strength of existing lightweight box bodies in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of packaging box technology, specifically to a folding box structure. Background Technology

[0002] In the fields of packaging, logistics and product protection, box structures are widely used for the storage and turnover of everyday goods, electrical appliances, precision components and fragile items. With the increasing complexity of the transportation environment and the rapid development of the e-commerce industry, packaging boxes must not only meet the basic requirements of containment and dust protection, but also ensure the safety of the contents under conditions such as stacking, repeated handling and accidental impact. This places higher demands on the overall mechanical strength of the box.

[0003] Most existing boxes are made of cardboard, plastic sheets, or simple composite materials, with a structure primarily based on single-layer folding and interlocking. While these boxes can meet basic usage under light loads, they are prone to deformation, collapse, or corner breakage when subjected to external pressure, drop impacts, or long-term stacking. To improve structural strength, the industry commonly reinforces boxes with high-strength cardboard. However, this approach directly increases material consumption, box weight, and processing costs, negatively impacting transportation efficiency and packaging cost control.

[0004] Therefore, there is an urgent need for a new type of box structure with reasonable structural design, excellent stress performance and controllable manufacturing cost to solve the technical problem of insufficient strength of existing lightweight box structures. Utility Model Content

[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose a folding box structure to solve the technical problem of insufficient strength of existing lightweight box structures.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution: This utility model provides a folding box structure, including: a bottom plate having four bottom edges connected end to end in sequence; four side plates, each side plate being connected to one bottom edge, each side plate including two side edges adjacent to the bottom edge and a top edge opposite to the bottom edge, adjacent side plates being fixedly connected at the side edges, and the side plates being foldable relative to the bottom plate along the bottom edge; a reinforcing plate connected to at least one side edge and foldable along the side edge, the reinforcing plate being fitted to the inner or outer side of the side plate after folding; and a top plate connected to the top edge or the reinforcing plate and foldable along the top edge, the top plate, side plates and bottom plate enclosing a sealed or semi-sealed box space.

[0007] In some embodiments, the reinforcing plate is attached to one side of either side plate.

[0008] In some embodiments, the reinforcing plate includes a free edge opposite to the side edge, which overlaps with the side edge when folded.

[0009] In some embodiments, the reinforcing plate includes a plurality of sub-plates, each sub-plate being connected to a different side and foldable along its respective connected side. After folding, the sub-plates fit against the inner or outer side of their respective side plates.

[0010] In some embodiments, each side panel is connected to two sub-panels; the free ends of the two sub-panels connected to the same side panel are connected to each other after folding.

[0011] In some embodiments, there are at least two top plates, which are stacked on top of each other after being folded.

[0012] In some embodiments, an indentation is provided on the side plate near the bottom plate, and the indentation is serrated.

[0013] In some embodiments, the serrations are triangular.

[0014] In some embodiments, a plug plate is provided on the side plate and / or the reinforcing plate, and a socket corresponding to the plug plate is opened on the side plate. The plug plate is inserted into the socket to achieve a snap-fit ​​connection, so as to connect adjacent side plates or connect the side plate and the reinforcing plate.

[0015] In some embodiments, adjacent side panels, as well as the top panel and side panels, are connected by an adhesive layer disposed at the edges.

[0016] Compared with existing technologies, the folding box structure provided by this utility model significantly improves the overall load-bearing capacity and impact resistance of the box by setting foldable reinforcing plates on the side panels and combining multi-faceted folding with local reinforcement structures. After folding and fitting, the reinforcing plates form additional support surfaces parallel to the side panels, transforming the original single-layer structure into a partially double-layer or stacked structure. This effectively disperses the stress on the side panels and reduces stress peaks in weak areas such as fold lines and slots. Furthermore, the reinforcing plates are hinged along the side, ensuring smooth folding and simple processing. Significant reinforcement is achieved without increasing the thickness of the cardboard, combining the advantages of lightweight, low cost, and high structural strength. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a folding box structure provided in an embodiment of the present utility model; Figure 2 This is provided by the embodiment of the present utility model. Figure 1 A schematic diagram of the folded box structure after folding; Figure 3 This is a schematic diagram of another folding box structure provided in this embodiment of the present invention; Figure 4This is a schematic diagram of another folding box structure provided in this embodiment of the utility model.

[0018] Explanation of reference numerals in the attached figures: 10. Base plate; 11. Bottom edge; 20. Side plate; 21. Side edge; 22. Top edge; 23. Indentation; 24. Insert; 30. Reinforcing plate; 31. Free edge; 32. Sub-plate; 33. Free end; 34. Insert plate; 40. Top plate; 41. Adhesive layer. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0020] To address the technical problem of insufficient strength in existing lightweight box structures, this invention provides a folding box structure that can improve the strength of the box.

[0021] It should be noted that the folding box structure described in this utility model is used for, but not limited to, product packaging. For ease of explanation, this utility model only uses the application of the folding box structure in product packaging as an example. The principle of the folding box structure applied to other types of equipment is essentially the same as that applied to product packaging, and will not be elaborated here.

[0022] Please see Figure 1 and Figure 2 , Figure 1 This is a structural diagram of a folding box structure provided in one embodiment of the present invention. Figure 2 This is provided by the embodiment of the present utility model. Figure 1 The diagram shows the folded box structure. The folded box structure includes a base plate 10, four side plates 20, a reinforcing plate 30, and a top plate 40. Through multi-faceted folding and localized reinforcement, the box maintains lightweight and low cost while improving the overall structural resistance and stability.

[0023] The base plate 10 serves as the basic load-bearing component of the box, with four interconnected bottom edges 11 along its outer edge. These four bottom edges 11 are connected end-to-end and serve as the reference lines for folding the side plates 20. The four side plates 20 are respectively connected to the four bottom edges 11. Each side plate 20 is hinged to the base plate 10 via a pre-set fold line, allowing it to switch between an unfolded and folded state. Each side plate 20 includes two side edges 21 adjacent to the bottom edges 11 for connecting with adjacent side plates 20, and a top edge 22 opposite to the bottom edges 11 for forming a folding connection with the top plate 40. During assembly, the side plates 20 are folded upwards along the bottom edges 11. Adjacent side plates 20 are fixed at the side edges 21 using snap-fit, adhesive, or slot structures, forming a stable three-dimensional frame for the box.

[0024] A reinforcing plate 30 is disposed at the side edge 21 of at least one side plate 20 and can be folded together with the side plate 20 via a fold line. After folding, the reinforcing plate 30 can be selectively attached to the inner or outer surface of the side plate 20 to locally reinforce weak areas of the side plate 20 and improve the stability of the side plate 20 under pressure, impact, or stacking loads. The reinforcing plate 30 can be a single sheet structure or composed of double-layer or laminated cardboard. Its folding direction is consistent with the side edge 21 of the side plate 20, making it easy to manufacture and process in the unfolded state and providing planar support or double-layer composite reinforcement after folding.

[0025] The top plate 40 is connected to the top edge 22 of the side plate 20 via a fold line or to the side of the reinforcing plate 30 near the top edge 22, allowing it to fold over and cover the box when closed. The top plate 40 can be a unidirectional folding type or can include multiple top cover pieces that overlap to achieve closure, further enhancing the box's sealing and pressure resistance. When the top plate 40 and side plate 20 are folded together and enclosed with the bottom plate 10, a sealed or semi-sealed box space can be formed to adapt to different packaging needs, such as general goods packaging, stacking and transportation, or storage scenarios requiring dust and moisture protection.

[0026] In this embodiment, a foldable reinforcing plate 30 is provided at the side edge 21 of the side plate 20, thereby improving the structural strength of the traditional single-layer folding box. After folding and fitting, the reinforcing plate 30 forms an additional support surface parallel to the side plate 20, transforming the original single-layer stress-bearing structure into a partially double-layer or stacked structure, thus significantly improving the deformation resistance of the side plate 20 under pressure, bending, and impact conditions. When external force is applied to the surface of the side plate 20, the reinforcing plate 30 disperses local stress through its planar rigidity and transfers concentrated loads to more areas of the side plate 20, effectively reducing stress peaks at creases, corners, and joints, and preventing traditional paper folding boxes from cracking, collapsing, or buckling at these weak points.

[0027] In one embodiment, please refer to Figure 3 , Figure 3 This is a schematic diagram of another folding box structure provided in one embodiment of the present invention. The reinforcing plate 30 adopts a single-sided hinge, that is, the reinforcing plate 30 is connected to only one side 21 of any side plate 20 through a single fold line. This connection means that the reinforcing plate 30 only needs to rely on this one side 21 as a reference line for rotation or folding, without simultaneously connecting to multiple sides 21, and without the need for complex multi-point connection structures. Through this single-sided hinge setting, the reinforcing plate 30 can achieve smooth flipping action in a single axis direction during folding, thereby simplifying the overall folding sequence of the box, improving assembly flexibility, and avoiding the folding interference or mutual force restraint problems common in multi-faceted folding structures.

[0028] In practice, although the reinforcing plate 30 is only connected to one side 21 at the hinge position, its actual size is not limited to the width of the side plate 20. Depending on the stress requirements of the box, the reinforcing plate 30 can extend into the area of ​​adjacent side plates 20, its length capable of spanning a single side plate 20 and partially covering another side plate 20 or even multiple side plates 20. When the box is folded, the reinforcing plate 30 can naturally fold along the fold line connecting the side 21 to the inside or outside of the box. Due to the large size of the reinforcing plate 30, its folded coverage area can simultaneously adhere to one side plate 20, or it can extend across the corners to adhere to a combination of two or more side plates 20.

[0029] In this embodiment, through a structure combining single-sided connection and multi-sided bonding, the reinforcing plate 30, after folding, can span stress concentration areas such as the corners or sides of the box, providing a larger support area under external forces. This allows the load to be distributed and transferred between the reinforcing plate 30 and the side plate 20. The spanning and covering structure of the reinforcing plate 30 can act as a "corner reinforcement," achieving overall reinforcement of weak areas and significantly improving the structural stability of the box under vertical stacking, lateral compression, and drop impact conditions.

[0030] Furthermore, in some embodiments, the reinforcing plate 30 includes a free edge 31 located opposite the connecting side 21. This free edge 31 is in an unfolded state before the reinforcing plate 30 and side plate 20 are folded, maintaining a spaced relationship with the outer boundary of the side plate 20. When the reinforcing plate 30 is folded along the fold line of the connecting side 21 towards the inside or outside of the box, the free edge 31 gradually approaches the body of the side plate 20, and after folding to its final position, it coincides with or closely adheres to the corresponding edge of the side plate 20. Through this folding action, the reinforcing plate 30 transforms from a single-sided extension into a wrapping structure surrounding the side plate 20, allowing the reinforcing plate 30 and side plate 20 to achieve a partially or fully closed combination in the circumferential direction, thereby forming a geometric wrapping effect around the side plate 20.

[0031] In this embodiment, when the free edge 31 is attached and covers the opposite side edge 21, the reinforcing plate 30 forms a sleeve-like or wrap-around structure around the side plate 20, thereby strengthening the side plate 20 in both the width and thickness directions. Particularly in the edge area of ​​the side plate 20, traditional cardboard structures are prone to edge cracking due to weak creases or insufficient edge compression resistance. The wrapping attachment of the free edge 31 provides double or multiple layers of composite reinforcement to the edge area, allowing it to withstand lateral pressure and compressive impact, thus improving the overall stability of the edge area of ​​the side plate 20.

[0032] Furthermore, the overlap of the free edge 31 and the side edge 21 makes the stress path of the reinforcing plate 30 more continuous after folding. The reinforcing plate 30 not only forms a large-area support on the surface of the side plate 20, but also covers the edge line of the side plate 20 through its free edge 31, allowing local stress to be transmitted through multiple paths between the reinforcing plate 30 and the side plate 20. When external force acts on any area of ​​the surface of the side plate 20, it is no longer concentrated on a single crease or seam, but is dispersed to a larger area through the surrounding reinforcing plate 30 structure, thereby reducing stress concentration and improving bending, torsional, and compressive resistance.

[0033] In some embodiments, please refer to Figure 4 , Figure 4 This is a schematic diagram of a folding box structure according to an embodiment of the present invention. The reinforcing plate 30 may include multiple independently separated sub-plates 32, each sub-plate 32 being disposed at a different side edge 21 of a side plate 20 and connected to the corresponding side edge 21 of the side plate 20 by its respective fold line. Each sub-plate 32 uses one side edge 21 of its side plate 20 as a folding reference, and can be folded inward or outward along that side edge 21, so that each sub-plate 32 fits against the inner or outer surface of its corresponding side plate 20 after folding.

[0034] The multi-subplate 32 structure gives the reinforcing plate 30 greater modularity and adjustability. Since the subplates 32 are no longer a single unit but distributed as independent segments on different sides, each subplate 32 can be folded separately according to the folding sequence of the box during the folding process, enabling targeted localized reinforcement of specific areas. Furthermore, the multi-subplate 32 structure allows for flexible adjustments based on the packaging requirements of different products. For example, sides prone to stress concentration or subjected to long-term stacking pressure can be equipped with larger subplates 32 or double-layered subplates 32, while sides with lower stress only require smaller subplates 32 or omit them altogether. This "on-demand distributed reinforcement" approach enables more precise and economical structural reinforcement design, improves material utilization, and reduces production costs.

[0035] In this embodiment, by designing the reinforcing plate 30 as multiple independent sub-plates 32 and connecting them to the sides 21 of different side plates 20, a multi-point reinforcement, independent folding and faceted bonding structure is effectively realized, which significantly improves the overall pressure resistance, bending resistance and impact resistance of the box while maintaining its lightweight and folding convenience.

[0036] Furthermore, in some embodiments, two sub-plates 32 may be connected to each side plate 20. The two sub-plates 32 are located at different sides 21 of the side plate 20, typically corresponding to the left and right sides 21 of the side plate 20. Each sub-plate 32 is connected to the side plate 20 via an independent fold line, forming a foldable hinge, allowing the two sub-plates 32 to be folded inward or outward along their respective sides 21 during the box forming process. Compared to the local reinforcement of a single sub-plate 32, configuring two foldable sub-plates 32 on the same side plate 20 provides the side plate 20 with unfoldable reinforcement structures on both its left and right sides, forming a symmetrical or nearly symmetrical reinforcement system.

[0037] Specifically, when the two sub-plates 32 connected to the same side panel 20 are folded into place, their free ends 33 can contact and connect with each other. The connection between the free ends 33 can be achieved by adhesive bonding, snap-fit ​​insertion, positioning tongue and groove structure, or simple edge overlap pressing. After the two sub-plates 32 are folded along the two side edges 21 and joined at the free ends 33, a continuous covering surface can be formed on the outside or inside of the side panel 20.

[0038] In this embodiment, the free ends 33 of the two sub-plates 32 are connected to each other after folding, so that the reinforcing structure is no longer limited to a local area of ​​the side plate 20, but forms a complete reinforcing surface. The connection of the free ends 33 makes the two close into a continuous reinforcing structure on the outside (or inside) of the side plate 20, which is equivalent to forming a reinforcing surface on one side of the side plate 20. Through planar support, the side plate 20 exhibits higher bending stiffness and torsional stability when under stress.

[0039] In one embodiment, there are at least two top plates 40, meaning that at least two independent top cover structures are provided on the upper side of the box. These top plates 40 are connected to the top edge 22 of the side plate 20 through their respective fold lines, and each top plate 40 can be folded towards the center of the box along its corresponding top edge 22. When the box is folded and in a closed state, each top plate 40 folds over the opening of the box one by one according to a preset folding sequence, so that multiple top plates 40 are stacked on top of each other in the vertical direction to form a top closed surface with a multi-layered structure.

[0040] Multiple top panels 40 are stacked on top of each other, so that the top of the box no longer relies on a single piece of cardboard for closure and support. Instead, two or more layers of top panels 40 form a structure similar to a "stacked cover" or a "multi-layered reinforced cover." The first layer of top panel 40 is folded to cover the box opening, and the second and subsequent layers of top panels 40 are folded and attached on top of it, so that each layer of top panel 40 becomes part of the overall closed structure. This multi-layered stacking method can create multiple stress surfaces between the top panels 40. When subjected to external pressure, the layers of top panels 40 can support each other and jointly distribute the load, thereby significantly improving the compressive strength and impact resistance of the top panel 40 area.

[0041] In this embodiment, a thicker reinforced area is formed on the top of the box. When external force is applied to the top surface, the pressure is not directly concentrated on a single layer of cardboard, but is transmitted and diffused through the multi-layer structure, allowing the stress to be evenly distributed across different layers. This effectively reduces the risk of bending, slumping, or tearing caused by insufficient load-bearing capacity of a single layer of cardboard. For packaging scenarios requiring stacked transportation or long-term pressure, the multi-layered top plate 40 structure can significantly improve the load-bearing limit of the box, enabling the box to maintain a stable shape under longitudinal stacking.

[0042] In one embodiment, please refer to Figure 2 , Figure 2 This is a schematic diagram of another folding box structure provided in an embodiment of the present invention. One or more indentations 23 are provided on the side panel 20 near the bottom plate 10. These indentations 23 are located near the fold line area connecting the side panel 20 and the bottom plate 10 and extend along the bottom edge 11, serving to provide localized flexibility adjustment and stress buffering for the cardboard structure near the fold line. In this embodiment, the indentations 23 are serrated, their geometry consisting of multiple continuous sharp segments. These sharp segments are periodically alternating along the direction of the indentations 23, forming a serrated structure similar to wave crests and troughs.

[0043] This serrated indentation 23 can be formed on the cardboard in one step using a die-cutting tool, or it can be pre-pressed locally using a rolling crease tool. The serrated indentation 23 can act as a "stress buffer" when the box is subjected to bottom impact, stacking, or lateral compression. Since it does not bear the main bending function of the fold line, the serrated indentation 23 can preferentially produce small elastic deformation under external force, so that the stress near the fold line is partially absorbed and dispersed, thereby improving the durability and fatigue resistance of the fold line body.

[0044] Furthermore, the serrated indentation 23 provides a slight anti-outward expansion constraint after molding, allowing the side panel 20 to maintain a more stable upright position after folding. Because the serrated indentation 23 has multiple small crease units with slight variations in multiple directions, its cumulative effect can create localized rigidity enhancement at the root of the side panel 20, making the side panel 20 less prone to folding outward under stress and improving the overall three-dimensional shape retention of the box.

[0045] Furthermore, in some embodiments, the serrated indentation 23 has a triangular structure. The indentation 23 consists of multiple consecutively arranged triangular indentation units, each triangle having two directional features: a pointed corner and a base 11. The pointed corner faces the side plate 20, thus forming a regular geometric segmented texture in the indentation 23 area. The triangular serrations can be formed in one step by a die-cutting tool or forming roller, so that each triangular unit forms a local crease indentation on the cardboard surface.

[0046] The triangular indentation 23 possesses excellent stress dispersion capabilities. Because the triangular units form localized flexible nodes at their apex, each triangular apex can act as a micro-buffer point, generating slight elastic deformation when subjected to external forces. This "multi-point subdivision" absorbs external forces, preventing cracking or fatigue damage to the paper fibers near the fold line due to stress concentration. Simultaneously, the straight structure of the triangular base 11 gives the indentation 23 high in-plane stability, maintaining uniform stiffness across the entire indentation 23 area and preventing abnormal material stress in any particular section.

[0047] In one embodiment, the side panel 20 and / or reinforcing plate 30 are provided with an insert plate 34 structure for assembly and positioning, and the side panel 20 has a corresponding slot 24 that matches the insert plate 34. The insert plate 34 is typically formed by extending along the edge of the board body and can be inserted into the slot 24 by a simple pushing action during the folding process to achieve mechanical interlocking between the cardboard pieces. The mating structure at the insertion port of the insert plate 34 can utilize the elasticity of the cardboard itself to form a clamping effect, making the insert plate 34 less likely to loosen after insertion, thereby providing a stable connection force for the overall structure.

[0048] In this embodiment, the cooperation between the insert plate 34 and the socket 24 can be used to fix adjacent side plates 20, maintain a stable positional relationship, and prevent the side plates 20 from turning outward or inward. Simultaneously, this structure can also be used to connect the reinforcing plate 30 and the side plates 20, allowing the reinforcing plate 30 to not only rely on the fold line for positioning after folding and fitting, but also gain additional in-plane stability through the snap-fit ​​of the insert plate 34, thereby enhancing the fitting effect and reinforcement of the reinforcing plate 30. Since the insert plate 34 structure can achieve rapid, self-locking assembly without the need for adhesives or additional fasteners, it can significantly simplify the molding process of the box and improve the assembly efficiency and service life of the overall structure.

[0049] Additionally, in some embodiments, adhesive, double-sided tape, or other curable adhesive materials are pre-applied to the edge areas of the side panels 20 or top panel 40. During the folding and forming process of the box, when the side panels 20 are erected and brought into contact with adjacent side panels 20, the adhesive layer 41 can automatically bond and cure, forming a stable connection between adjacent surfaces. Similarly, when the top panel 40 is folded to the box opening position, the adhesive layer 41 at the edge of the top panel 40 can bond with the corresponding contact area on the side panels 20, thereby completing the auxiliary fixation of the top sealing structure.

[0050] In this embodiment, by providing an adhesive layer 41 at the edges, the box achieves higher airtightness and overall stability after molding. The adhesive layer 41 has good flexibility and adhesion, enabling continuous bonding even with certain tolerances or slight deformations in the cardboard, thereby improving the overall rigidity between the side panels 20 and reducing loosening and warping at the opening. Furthermore, this structure enhances the tear resistance of the top panel 40 after sealing, ensuring the box remains stably closed during transportation, stacking, or handling, and is less prone to loosening due to vibration.

[0051] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A folding box structure, characterized in that, include: The base plate has four bottom edges, which are connected end to end in sequence; Four side panels, each of the side panels being connected to a bottom edge, each of the side panels including two side edges adjacent to the bottom edge and a top edge opposite to the bottom edge, adjacent side panels being fixedly connected at the side edges, and the side panels being foldable relative to the bottom plate along the bottom edge; A reinforcing plate, connected to at least one of the side panels, and foldable along the side panel, wherein the folded reinforcing plate fits against the inner or outer side of the side panel; and The top plate is connected to the top edge or the reinforcing plate and can be folded along the top edge. The top plate, the side plate and the bottom plate enclose a sealed or semi-sealed box space.

2. The folding box structure according to claim 1, characterized in that, The reinforcing plate is connected to one of the sides of any of the side plates.

3. The folding box structure according to claim 2, characterized in that, The reinforcing plate includes a free edge opposite to the side edge, and after folding, the free edge coincides with the side edge.

4. The folding box structure according to claim 1, characterized in that, The reinforcing plate includes multiple sub-plates, each of which is connected to a different side and can be folded along its respective connected side. After folding, the sub-plate fits against the inner or outer side of its corresponding side plate.

5. The folding box structure according to claim 4, characterized in that, Each of the side panels is connected to two of the sub-panels; the free ends of the two sub-panels connected to the same side panel are connected to each other after folding.

6. The folding box structure according to claim 1, characterized in that, There are at least two top plates, which are folded and stacked on top of each other.

7. The folding box structure according to claim 1, characterized in that, An indentation is provided on the side plate near the bottom plate, and the indentation is serrated.

8. The folding box structure according to claim 7, characterized in that, The serrations are triangular.

9. The folding box structure according to any one of claims 1 to 8, characterized in that, The side plate and / or the reinforcing plate are provided with insert plates, and the side plate has a corresponding socket. The insert plate is inserted into the socket to achieve a snap-fit ​​connection, so as to connect the adjacent side plates or connect the side plate and the reinforcing plate.

10. The folding box structure according to any one of claims 1 to 8, characterized in that, The adjacent side panels, as well as the top panel and the side panels, are connected by an adhesive layer disposed at the edges.

Images