Packaging box

Abstract

The invention belongs to the technical field of packaging, and provides a packaging box which comprises a rectangular bottom plate, first surrounding plates and second surrounding plates, the first surrounding plates are connected to the first edges of the two symmetrical sides of the bottom plate, each first surrounding plate comprises a plurality of first folding plates which are sequentially connected, and the adjacent first folding plates can be bidirectionally folded; folding sheets are connected to the two side ends of each first folding plate; the second surrounding plates are connected to the second edges of the two symmetrical sides of the bottom plate, each second surrounding plate comprises a plurality of second folding plates connected in sequence and a wrapping plate connected with the second folding plate on the outermost layer, the number of the second folding plates is the same as that of the first folding plates, and the adjacent second folding plates can be bidirectionally folded; the wrapping plate is used for wrapping the second folding plates, and the wrapping plate can be bidirectionally folded on the end part of the second folding plate on the outermost layer. The technical problem that the size of a packaging box structure in the prior art cannot be adjusted is solved.

Description

Technical Field

[0001] The present application belongs to the field of packaging technology, and in particular relates to a packaging box with adjustable height. Background Art

[0002] During the shipment stage of production, products such as electronic products generally need to be packaged, such as using packaging boxes to package the products, so that the products can be handled and transported. In actual applications, different products have different volumes or different numbers of products that need to be shipped together, resulting in differences in the overall size of the products that need to be packaged. In this regard, a common solution is to prepare packaging boxes of various sizes in advance, so that they can be selected according to the volume and quantity of the products. Packaging boxes of various specifications will increase storage space and increase production costs.

[0003] It can be seen that the packaging boxes currently on the market cannot be adjusted in size and have low applicability, which does not meet the needs of today's logistics applications. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide a packaging box to solve the technical problem that the size of the packaging box structure in the prior art cannot be adjusted.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted in this application is: to provide a packaging box, including:

[0006] A rectangular bottom plate, the bottom plate having two opposite first edges and two other opposite second edges;

[0007] A first enclosure is symmetrically connected to the first edges on both sides, the first enclosure includes a plurality of first folding plates connected in sequence, and first movable ribs are provided between adjacent first folding plates, so that adjacent first folding plates can be folded in two directions; folding pieces are connected to both side ends of each first folding plate, and second movable ribs are provided between the folding pieces and the ends of the first folding plates, so that the folding pieces can be folded in two directions on the ends of the first folding plates;

[0008] The second enclosure is symmetrically connected to the second edges on both sides, and includes a plurality of second folding plates connected in sequence and a covering plate connected to the outermost second folding plates, and the number of the second folding plates is the same as that of the first folding plates; third movable ribs are provided between adjacent second folding plates to enable adjacent second folding plates to be folded in two directions; the covering plate is used to cover the second folding plates, and fourth movable ribs are provided between the covering plate and the outermost second folding plate to enable the covering plate to be folded in two directions on the end of the outermost second folding plate.

[0009] The packing box provided by the present application has the following beneficial effects: compared with the prior art, the packing box structure of the present application includes a bottom plate and first enclosures on two opposite sides of the bottom plate and second enclosures on two opposite sides, the first enclosure includes a plurality of first folding plates, the second enclosure includes a plurality of second folding plates and a covering plate which are the same in number as the first folding plates, and each adjacent folding plate can be folded in two directions. In this way, when the adjacent folding plates are unfolded, the height of the enclosure can be increased, or when the adjacent folding plates are folded mutually, the height of the enclosure can be reduced, thereby quickly adjusting the height dimension of the packing box and changing the overall volume of the packing box.

[0010] In order to ensure the structural stability of the adjusted packaging box, both side ends of the first folding plate are provided with folding pieces, which can be folded in two directions on the end of the first folding plate, so that when the adjacent first folding plates are unfolded or folded with each other, the folding pieces can extend to the adjacent second folding plates and be covered with the second folding plates and / or the covering plates, thereby locking the shape of the packaging box and improving the structural stability of the packaging box.

[0011] The packaging box of the embodiment of the present application adopts its own folding structure, and the shape of the packaging box can be quickly changed by switching the folding mode, and no auxiliary tools such as glue and nails are required for fixing, and it can be reused, which effectively reduces the production cost. The packaging box of the embodiment of the present application can flexibly change the shape of the packaging box according to the size and quantity of the items to be transported, thereby adjusting the size of the packaging box and effectively meeting the needs of the transporter.

[0012] An improvement is made to the structure of the packaging box, wherein the first enclosure includes an even number of the first folding plates, and the areas of the first folding plates are the same; the second enclosure includes the same number of the second folding plates as the first folding plates, and the areas of the second folding plates are the same as the areas of the first folding plates. In this way, the shape of the packaging box can be quickly changed, the height of the packaging box can be adjusted, and the volume of the packaging box can be changed by folding the even number of folding plates.

[0013] In one embodiment, the area of ​​the covering plate is equal to the sum of the areas of the plurality of second folding plates, and the area of ​​the covering plate is the same as that of the bottom plate. On the one hand, each adjacent second folding plate can be within the covering range of the covering plate when unfolded, thereby ensuring the structural strength of the packaging box; on the other hand, when each adjacent second folding plate is folded, the covering plate can be attached to the bottom plate, thereby ensuring the flatness of the inner bottom surface of the packaging box.

[0014] Another improvement is made to the structure of the packaging box. The first enclosure includes an even number of the first folding plates, and a first sub-plate connected to the outermost first folding plate, the area of ​​the first sub-plate is smaller than the first folding plate, and can be folded on the adjacent first folding plate; the second enclosure includes the same number of second folding plates as the first folding plates, and a second sub-plate connected between the second folding plate and the covering plate, the area of ​​the second sub-plate is smaller than the adjacent second folding plate and the same as the area of ​​the first sub-plate, and the second sub-plate can be folded on the adjacent second folding plate; the covering plate includes a third folding plate movably connected to the second sub-plate, and the area of ​​the third folding plate is the same as the area of ​​the second sub-plate. In this way, a sub-plate is added on the basis of an even number of folding plates, so as to achieve an additional layer on the basis of the original even number of layers, further increasing the volume of the packaging box and increasing the adjustable size of the packaging box.

[0015] In one embodiment, the folding sheets are also provided at both side ends of the first sub-board; the area of ​​the covering board is equal to the sum of the areas of the plurality of second folding boards and the second sub-board, so that each adjacent second folding board can be within the covering range of the covering board when unfolded, thereby ensuring the structural strength of the packaging box.

[0016] A third improvement is made to the structure of the packaging box, wherein the bottom plate is rectangular, and has two opposite long sides and two opposite short sides; the first enclosure is symmetrically connected to the two short sides of the bottom plate, and the second enclosure is symmetrically connected to the two long sides of the bottom plate. In this way, the first enclosure with more folding structures is connected to the short sides of the bottom plate, which effectively improves the strength of the supporting structure formed by the folded components of the first enclosure, thereby improving the structural stability of the entire rectangular packaging box.

[0017] An improvement is made to the connection structure between the covering plate and the first folding plate, wherein a buckle block is provided on the covering plate; the first folding plate connected to the bottom plate is provided with a first buckle groove for buckling with the buckle block, and the first buckle groove matches the position of the buckle block. In this way, when the second folding plates of the second enclosure are unfolded, the covering plate is buckled into the packaging box and vertically extends to the bottom plate, and the buckle block is just buckled and fixed with the first buckle groove, so that the covering plate and the first folding plate are connected to each other, preventing the covering plate from being easily separated and causing the packaging box to decompose, and effectively ensuring the structural stability of the packaging box.

[0018] In one embodiment, each of the first folding plates is provided with the first buckle groove, and the buckle blocks are provided on both sides of the covering plate, and each of the buckle blocks corresponds to the first buckle groove of each of the first folding plates. In this way, each buckle block on the covering plate can be buckled into the first buckle groove of each of the first folding plates, effectively increasing the connection parts between the covering plate and each of the first folding plates, thereby improving the structural strength of the packaging box.

[0019] Another improvement is made to the connection structure between the covering plate and the first folding plate, wherein the covering plate is provided with a buckle block; the first folding plate connected to the bottom plate is provided with a second buckle groove for buckling with the buckle block, and the second buckle groove is arranged near the connection between the first folding plate and the bottom plate. Thus, when the covering plate is attached to the bottom plate, the buckle block and the second buckle groove on the first folding plate are buckled with each other, so that the covering plate can be closely attached to the bottom plate, preventing the covering plate from easily warping up, and effectively ensuring the flatness of the bottom surface of the packaging box.

[0020] In one embodiment, the bottom plate, the first enclosure plate and the second enclosure plate are all made of corrugated material, which not only ensures the folding flexibility of each folding plate and the structural strength of the packaging box formed by folding, but also saves costs and can be recycled and reused. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 A schematic diagram of the unfolded state of the packaging box provided in an embodiment of the present application;

[0023] Figure 2 A schematic diagram of a first size structure of a packaging box provided in an embodiment of the present application;

[0024] Figure 3 A schematic diagram of a second size structure of a packaging box provided in an embodiment of the present application;

[0025] Figure 4 A schematic diagram of the unfolded state of the first packaging box provided in an embodiment of the present application;

[0026] Figure 5 A schematic diagram of a first folding stage of a first size of a first packaging box provided in an embodiment of the present application;

[0027] Figure 6A schematic diagram of a second folding stage of a first size of a first packaging box provided in an embodiment of the present application;

[0028] Figure 7 A schematic diagram of the structure of the first packaging box of the first size provided in an embodiment of the present application after folding;

[0029] Figure 8 A schematic diagram of a first folding stage of a second size of a first packaging box provided in an embodiment of the present application;

[0030] Fig. 9 A schematic diagram of a second folding stage of a second size of a first packaging box provided in an embodiment of the present application;

[0031] Fig.10 A schematic diagram of the structure of the second size of the first packaging box provided in an embodiment of the present application after folding;

[0032] Fig.11 A schematic diagram of the unfolded state of the second packaging box provided in an embodiment of the present application;

[0033] Fig.12 A schematic diagram of a first folding stage of a first size of a second packaging box provided in an embodiment of the present application;

[0034] Fig.13 A schematic diagram of a second folding stage of a first size of a second packaging box provided in an embodiment of the present application;

[0035] Fig.14 A schematic diagram of the structure of the second packaging box of the first size provided in the embodiment of the present application after folding;

[0036] Fig.15 A schematic diagram of a first folding stage of a second size of a second packaging box provided in an embodiment of the present application;

[0037] Fig.16 A schematic diagram of a second folding stage of a second size of a second packaging box provided in an embodiment of the present application;

[0038] Fig.17 A schematic diagram of the structure of the second packaging box of the second size provided in the embodiment of the present application after folding;

[0039] Fig.18 A partially enlarged schematic diagram of a second size of the second packaging box provided in an embodiment of the present application after folding;

[0040] Fig.19 A schematic diagram of a first folding stage of a third size of a second packaging box provided in an embodiment of the present application;

[0041] Fig. 20A schematic diagram of a second folding stage of a third size of a second packaging box provided in an embodiment of the present application;

[0042] Fig.21 A schematic diagram of the structure of the third size of the second packaging box provided in an embodiment of the present application after folding;

[0043] Fig. 22 A partially enlarged schematic diagram of the third size of the second packaging box provided in an embodiment of the present application after folding;

[0044] Fig.23 A schematic diagram of a partial structure of a packaging box provided in an embodiment of the present application;

[0045] Fig.24 A schematic diagram of the folding structure of a packaging box provided in an embodiment of the present application.

[0046] Among them, the reference numerals in the figure are:

[0047] 1- Bottom plate;

[0048] 2-first enclosure; 21-first folding plate; 211-first movable rib; 22-folding sheet; 221-second movable rib; 23-first sub-plate; 24-first buckle groove; 25-second buckle groove;

[0049] 3-second enclosure; 31-second folding plate; 311-third movable rib; 32-cladding plate; 321-fourth movable rib; 322-third folding plate; 33-second sub-plate; 34-buckle block. DETAILED DESCRIPTION

[0050] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0051] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0052] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0053] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0054] Traditional packaging boxes are generally made of foldable flat paper, which is convenient for storage and storage, and helps to save space. There are folding lines on the flat paper, which can be folded according to the folding lines on the flat paper to form a three-dimensional carton for loading products, which is convenient for handling and logistics transportation.

[0055] In order to change the size of the packaging box, the general idea in the industry is to use the method of adding an expansion part or increasing the height of the part. In the related art, a mounting part such as a buckle is provided on the main body of the packaging box to connect with the added expansion part. When the size of the packaging box needs to be increased, the expansion part is added to the main body of the packaging box, thereby changing the original size of the packaging box and expanding the capacity of the packaging box.

[0056] It can be seen that the expansion part is a separate component, which is installed on the main body of the packaging box when the size needs to be increased. This means that the company needs to purchase the expansion part separately and install it when it is needed, which is cumbersome; moreover, the expansion part needs to be stored separately, which increases the occupied space and production costs.

[0057] Therefore, after painstaking research by the applicant, a new packaging box structure has been designed, breaking the inherent thinking of industry professionals (the inherent thinking refers to the improvement idea of ​​simply adding an extension part to increase the capacity of the packaging box body in order to change the original size of the packaging box), and creatively proposing a new packaging box with adjustable height and reusable size. The packaging box does not need to add an extension part, but only uses its own structure to switch the folding method to achieve rapid conversion of different height specifications, which is conducive to meeting the use requirements of products of different sizes and effectively solving the problem that the traditional packaging box structure cannot adjust the size. It is now described in detail.

[0058] Please also read Figure 1 , Figure 2 and Figure 3 The packaging box includes a rectangular bottom plate 1, a first enclosure plate 2 and a second enclosure plate 3.

[0059] like Figure 1 As shown, the rectangular bottom plate 1 has two opposite first edges and two other opposite second edges, wherein the first enclosure 2 is symmetrically connected to the first edges on both sides of the bottom plate 1, and the second enclosure 3 is symmetrically connected to the second edges on the other two sides of the bottom plate 1.

[0060] The first enclosure 2 includes a plurality of first folding plates 21 connected in sequence, and first movable ribs 211 are provided between adjacent first folding plates 21, so that adjacent first folding plates 21 can be folded in two directions. The "two-way folding" here can be understood as one of the first folding plates 21 can be folded forwardly on the front side of another first folding plate 21 by the first movable ribs 211, or folded backwardly on the back side of the other first folding plate 21. (The following two-way folding is understood similarly)

[0061] Both side ends of each first folding plate 21 are connected with folding pieces 22 , and a second movable rib 221 is provided between the folding piece 22 and the first folding plate 21 , so that the folding piece 22 can be folded in two directions on the end of the first folding plate 21 .

[0062] The second enclosure 3 includes a plurality of second folded plates connected in sequence and a covering plate 32 connected to the outermost second folded plate 31. The "outermost second folded plate 31" herein can be understood as the second folded plate 31 away from the bottom plate 1.

[0063] The number of the second folding plates 3 is the same as that of the first folding plates 21 , and third movable ribs 311 are arranged between adjacent second folding plates 31 , so that the adjacent second folding plates 31 can be folded in two directions.

[0064] The covering plate 32 is used to cover the second folding plate 31 , and a fourth movable rib 321 is provided between the covering plate 32 and the outermost second folding plate 31 , so that the covering plate 32 can be folded in two directions on the end of the outermost second folding plate 31 .

[0065] Compared with the prior art, the packaging box provided in the embodiment of the present application has a packaging box structure including a bottom plate 1 and first enclosure panels 2 on two opposite sides of the bottom plate 1 and second enclosure panels 3 on other opposite sides, the first enclosure panel 2 including a plurality of first folding panels 21, the second enclosure panel 3 including a plurality of second folding panels 31 and a covering panel 32 which are the same number as the first folding panels 21, and each adjacent folding panel can be folded in both directions.

[0066] In this way, Figure 2As shown, the height of the enclosure can be increased when the adjacent folding panels are unfolded; or, as shown Figure 3 As shown, when adjacent folding plates are folded together, the height of the enclosure plate is reduced, thereby quickly adjusting the height of the packaging box and changing the overall volume of the packaging box.

[0067] In order to ensure the structural stability of the adjusted packaging box, both side ends of the first folding plate 21 are provided with folding pieces 22, and the folding pieces 22 can be folded in two directions on the end of the first folding plate 21, so that when the adjacent first folding plates 21 are unfolded or folded with each other, the folding pieces 22 can extend to the adjacent second folding plates 31, and are covered by the second folding plates 31 and / or the covering plates 32, thereby locking the shape of the packaging box and improving the structural stability of the packaging box.

[0068] Compared with the structure of adding an extension part to the original packaging box body adopted in the related art, the packaging box in the embodiment of the present application adopts its own folding structure. The shape of the packaging box can be quickly changed by switching the folding method. No auxiliary tools such as glue, nails, etc. are required for fixing. It can be reused, which effectively reduces production costs.

[0069] The packaging box of the embodiment of the present application can flexibly change the shape of the packaging box according to the size and quantity of the items to be transported, thereby adjusting the size of the packaging box to effectively meet the needs of the transporter.

[0070] Preferably, in the packaging box of the embodiment of the present application, the bottom plate 1, the first enclosure 2 and the second enclosure 3 of the packaging box are all made of corrugated material. Specifically, corrugated paper can be preferably used for molding to achieve a full paper structure, which is conducive to storage and storage and saves space.

[0071] Corrugated paper is a corrugated paper made of noodle paper and corrugated rollers. Corrugated paper is a plate-like material formed by gluing. Corrugated paper has the advantages of low cost, light weight, easy processing, high strength, excellent printing adaptability, convenient storage and transportation, etc. It can also be recycled and reused, which is conducive to cost saving.

[0072] Corrugated paper includes single-layer paper specifications and double-layer paper specifications, which can be determined according to the overall size of the packaging box in the embodiment of the present application, specifically according to the number of the first folding plates 21 and the second folding plates 31. If the number of the first folding plates 21 and the second folding plates 31 is small (such as within two or three layers), the packaging box can be made of single-layer corrugated paperboard; if the number of the first folding plates 21 and the second folding plates 31 is large (such as four or five layers or more), the packaging box can be made of double-layer corrugated paperboard, which is conducive to ensuring the foldable flexibility of each folding plate and improving the structural strength of the folded packaging box.

[0073] The packaging box structure provided in the embodiment of the present application can be divided into at least two specifications according to the number of folding plates, including a packaging box structure with an odd number of foldable layers and a packaging box structure with an even number of foldable layers, which will be explained separately as follows.

[0074] Embodiment 1

[0075] For packaging structures with even foldable layers, see Figure 4 The first enclosure 2 of the packaging box includes an even number of first folding plates 21, and the areas of the first folding plates 21 are the same. The second enclosure 3 of the packaging box includes the same number of second folding plates 31 as the first folding plates 21, and the areas of the second folding plates 31 are the same as the areas of the first folding plates 21.

[0076] In this way, by utilizing the mutual folding of an even number of folding plates, the shape of the packaging box can be quickly changed, the height of the packaging box can be adjusted, and thus the volume of the packaging box can be changed.

[0077] As an example, see also Figure 1 and Figure 4 The opposite sides of the bottom plate 1 of the packaging box are respectively integrally connected with symmetrically arranged first enclosures 2, and the first enclosures 2 include two first folding plates 21 connected to the bottom plate 1 in sequence, and a first movable rib 211 is provided between the two first folding plates 21 so that the two first folding plates 21 can be folded or unfolded with each other.

[0078] Among them, there are folding pieces 22 on both side ends of the first folding plate 21, the area of ​​the folding piece 22 is smaller than that of the first folding plate 21, and there are second movable ribs 221 between the folding piece 22 and the end of the first folding plate 21, so that the folding piece 22 can be folded in two directions on the end of the first folding plate 21.

[0079] The other two opposite sides of the bottom plate 1 of the packaging box are respectively connected with symmetrically arranged second enclosure plates 3, which include two second folding plates 31 and a covering plate 32 connected to the bottom plate 1 in sequence. The area of ​​the second folding plates 31 is the same as that of the first folding plates 21. There is a third movable rib 311 between the two second folding plates 31, so that the two second folding plates 31 can be folded or unfolded with each other according to the folding method of the first folding plates 21. There is a fourth movable rib 321 between the covering plate 32 and the outermost second folding plate 31, so that the covering plate 32 can be folded in two directions at the end of the second folding plate 31.

[0080] like Figure 4 As shown, the initial state of the packaging box is a flat sheet of paper. When using, please refer to Figure 5 , Figure 6 and Figure 7, the first enclosure 2 on both sides of the bottom plate 1 can be folded toward the bottom plate 1 to make the first enclosure 2 stand upright. Specifically, the two first folding plates (21a, 21b) of the first enclosure 2 remain unfolded, and the folding sheets (22a, 22b) on both sides of each first folding plate (21a, 21b) are folded inward, so that the first folding plate 21 and the folding sheets 22 on both sides form a three-frame structure. Then, the second enclosure 3 is folded toward the bottom plate 1 to make the second enclosure 3 stand upright. Specifically, the two second folding plates (31a, 31b) of the second enclosure 3 remain unfolded and abut against the folding sheets (22a, 22b) folded on both sides. Finally, the covering plate 32 is buckled onto the second folding plates (31a, 31b) and the above-mentioned folding sheets (22a, 22b), thereby forming a packaging box with a double-layer structure.

[0081] Preferably, the area of ​​the covering plate 32 is equal to the sum of the areas of the plurality of second folding plates 31 , so that each adjacent second folding plate 31 can be within the covering range of the covering plate 32 when unfolded, thereby ensuring the structural strength of the packaging box.

[0082] When changing the size, such as Figure 4 As shown, the initial state of the packaging box is a flat sheet of paper. Figure 8 , Fig. 9 and Fig.10 , the first enclosure 2 on both sides of the bottom plate 1 can be folded toward the bottom plate 1 to make the first enclosure 2 stand upright. Specifically, the two first folding plates (21a, 21b) of the first enclosure 2 are folded with each other, specifically, the outermost first folding plate 21b is folded into the packaging box to be superimposed on the first folding plate 21a connected to the bottom plate 1. Among them, the folding pieces 22a on both sides of the first folding plate 21a connected to the bottom plate 1 are folded inwards to form an inward three-frame structure; the folding pieces 22b on both sides of the outermost first folding plate 21b are folded outwards to form an outward three-frame structure and superimposed in the inward three-frame structure, so that the folding pieces 22b overlap with the folding pieces 22a. Then, the second enclosure 3 is folded toward the bottom plate 1, so that the two second folding plates (31a, 31b) in the second enclosure 3 are folded with each other and covered on the above-mentioned folding pieces (22a, 22b). Finally, the covering plate 32 is attached to the bottom plate 1 to form a packaging box with a single-layer structure.

[0083] Preferably, the area of ​​the covering plate 32 is the same as that of the bottom plate 1, so that when each adjacent second folding plate 31 is folded with each other, the covering plate 32 can be accommodated on the bottom plate 1, thereby ensuring the flatness of the inner bottom surface of the packaging box.

[0084] Embodiment 2

[0085] For packaging structures with a single number of foldable layers, see Fig.11The first enclosure 2 of the packaging box includes an even number of first folding plates 21 and a first sub-plate 23 connected to the outermost first folding plate 21 . The area of ​​the first sub-plate 23 is smaller than that of the adjacent first folding plate 21 and can be folded on the adjacent first folding plate 21 .

[0086] The second enclosure 3 of the packaging box includes the same number of second folding plates 31 as the first folding plates 21, and second sub-plates 33 connected between the second folding plates 31 and the covering plates 32. The area of ​​the second sub-plate 33 is smaller than that of the adjacent second folding plates 31 and is the same as that of the first sub-plate 23. The second sub-plate 33 can be folded onto the adjacent second folding plates 31.

[0087] The covering plate 32 includes a third folding plate 322 movably connected to the second sub-plate 33 , and the area of ​​the third folding plate 322 is the same as that of the second sub-plate 33 .

[0088] In this way, a sub-board is added on the basis of the even-numbered folding boards, thereby achieving an additional layer on the basis of the original even-numbered layers, further increasing the volume of the packaging box and increasing the adjustable size of the packaging box.

[0089] As an example, Fig.11 As shown, the two opposite sides of the bottom plate 1 of the packaging box are respectively connected with symmetrically arranged first enclosure plates 2, and the first enclosure plates 2 include two first folding plates (21a, 21b) connected in sequence with the bottom plate 1 and a first sub-plate 23, the area of ​​the first sub-plate 23 is smaller than the adjacent first folding plate 21b, and the first sub-plate 23 can be folded on the adjacent first folding plate 21b. Folding sheets (22a, 22b, 22c) are respectively connected to the two side ends of each first folding plate (21a, 21b) and the first sub-plate 23.

[0090] The other two opposite sides of the packaging box bottom plate 1 are respectively connected to symmetrically arranged second enclosure panels 3, which include two second folding panels (31a, 31b) connected to the bottom plate 1 in sequence, a second sub-panel 33 and a covering panel 32, and the area of ​​the second sub-panel 33 is smaller than that of the adjacent second folding panel 31b.

[0091] like Fig.11 As shown, the initial state of the packaging box is a flat sheet of paper. When using, please refer to Fig.12 , Fig.13 and Fig.14, the first enclosure 2 on both sides of the bottom plate 1 can be folded toward the bottom plate 1 to make the first enclosure 2 stand upright. Specifically, the two first folding plates (21a, 21b) and the first sub-plate 23 of the first enclosure 2 are kept unfolded, and the folding pieces (22a, 22b, 22c) on both sides of each first folding plate (21a, 21b) and the first sub-plate 23 are folded inwardly, so that the first folding plates (21a, 21b) and the first sub-plate 23 and the folding pieces (22a, 22b, 22c) on both sides respectively form an inward three-frame structure. Then, the second enclosure 3 is folded toward the bottom plate 1 to make the second enclosure 3 stand upright. Specifically, the two second folding plates (31a, 31b) and the second sub-plate 33 in the second enclosure 3 are kept unfolded and abut against the folding pieces (22a, 22b, 22c) on both sides after being folded. Finally, the covering plate 32 is fastened to the second folding plates (31a, 31b), the second sub-plate 33 and the folding sheet 22, so as to form a packaging box with a three-layer structure.

[0092] Preferably, the area of ​​the covering plate 32 is equal to the sum of the areas of the two second folding plates 31 and the second sub-plate 33, so that each second folding plate 31 and the second sub-plate 33 can be within the covering range of the covering plate 32 when unfolded, thereby ensuring the structural strength of the packaging box.

[0093] In the first deformation of changing size, such as Fig.11 As shown, the initial state of the packaging box is a flat sheet of paper. Fig.15 , Fig.16 and Fig.17 , the first enclosure 2 on both sides of the bottom plate 1 can be folded toward the bottom plate 1 to make the first enclosure 2 stand upright. Specifically, the two first folding plates (21a, 21b) of the first enclosure 2 remain unfolded, and the first sub-plate 23 is folded into the packaging box to be stacked on the adjacent first folding plates 21b; the folding pieces (22a, 22b) on both sides of the two first folding plates (21a, 21b) are folded inward to form an inward three-frame structure; the folding pieces 22c on both sides of the first sub-plate 23 are folded outward to form an outward three-frame structure, and after being folded inward, they are stacked on the adjacent inward three-frame structure, so that the folding piece 22c overlaps the folding piece b. Then, as Fig.17 and Fig.18 As shown, the second enclosure 3 is folded toward the bottom plate 1, so that the two second folding plates (31a, 31b) in the second enclosure 3 remain unfolded, and the second sub-plate 33 is folded toward the adjacent second folding plate 31b and buckled on the adjacent second folding plate 31b, so that the above-mentioned folding sheets (22a, 22b, 22c) are all clamped inside. The third folding plate 322 on the covering plate 32 is folded in the opposite direction to the second sub-plate 33 and overlapped on the second sub-plate 33; finally, as shown Fig.18As shown, the covering plate 32 and the third folding plate 322 are folded forwardly so that the covering plate 32 can be attached to the two second folding plates 31 and the third folding plate 322, thereby forming a packaging box with a double-layer structure.

[0094] In the second deformation of changing size, such as Fig.11 As shown, the initial state of the packaging box is a flat sheet of paper. Fig.19 , Fig. 20 and Fig.21 , the first enclosure 2 on both sides of the bottom plate 1 can be folded toward the bottom plate 1 to make the first enclosure 2 stand upright. Specifically, the two first folding plates (21a, 21b) of the first enclosure 2 are folded with each other, wherein the folding piece 22a on the first folding plate 21a is folded inwards to form an inward three-frame structure; the folding piece 22b on the first folding plate 21b is folded outwards to form an outward three-frame structure, and the outward three-frame is folded toward the bottom plate to be superimposed on the inward three-frame structure, so that the folding piece 22b overlaps the folding piece 22a. On the basis of the above, the first sub-plate 23 is folded on the adjacent first folding plate 21b to make it fit on the bottom plate 1; the folding pieces 22c on both ends of the first sub-plate 23 overlap on the folding piece 22b. Then, as Fig. 20 and Fig.21 As shown, the second enclosure 3 is folded toward the bottom plate 1, so that the two second folding plates (31a, 31b) in the second enclosure 3 are folded with each other and covered on the folding sheets (22a, 22b, 22c). Fig. 22 As shown, the second sub-panel 33 needs to be folded inside the packaging box, and the third folding plate 322 on the covering plate 32 is also folded in half with the second sub-panel 33, so that the covering plate 32 can be flatly attached to the bottom plate 1, thereby forming a packaging box with a single-layer structure, effectively ensuring the flatness of the inner bottom surface of the packaging box.

[0095] For a rectangular packaging box, it can be a cube structure or a cuboid structure. For a packaging box that is a cuboid, in another embodiment of the present application (not shown), the bottom plate 1 is preferably a rectangle, and the bottom plate 1 has two opposite long sides and two opposite short sides. The first enclosure 2 is symmetrically connected to the two short sides of the bottom plate 1, and the second enclosure 3 is symmetrically connected to the two long sides of the bottom plate 1.

[0096] In this way, the first enclosure 2 with more folding structures is connected to the short side of the bottom plate 1, which effectively improves the strength of the supporting structure formed by the folded components of the first enclosure 2, thereby improving the structural stability of the entire rectangular packaging box.

[0097] In actual applications, due to the packaging box structure of the embodiment of the present application, no auxiliary tools such as glue or nails are required to fix the various components of the first enclosure 2 and the second enclosure 3. Therefore, the second enclosure 3 is particularly important for the fixing structure of the first enclosure 2. Otherwise, the packaging box structure formed by folding is easy to decompose, affecting the overall structural stability of the packaging box.

[0098] Here, in one embodiment of the present application, please refer to Fig.23 and Fig.24 , a buckle block 34 protruding outward is provided on the covering plate 32 of the second enclosure 3. In coordination, a first buckle groove 24 for buckling with the buckle block 34 is provided on the first folding plate 21a connected to the bottom plate 1. The first buckle groove 24 can preferably be a long strip hole vertically provided on the first folding plate 21, and the shape of the buckle block 34 matches the shape of the first buckle groove 24 and the position corresponds.

[0099] In this way, when all the second folding plates 31 of the second enclosure 3 are unfolded, the covering plate 32 is buckled into the packaging box and extends vertically to the bottom plate 1, and the buckle block 34 is just buckled and fixed with the first buckle groove 24, so that the covering plate 32 and the first folding plate 21 are connected to each other, preventing the covering plate 32 from being easily separated and causing the packaging box to disassemble, effectively ensuring the structural stability of the packaging box.

[0100] Preferably, in another embodiment of the present application, please refer to Fig.24 , each first folding plate 21 is provided with the first buckle groove 24; correspondingly, the above-mentioned buckle blocks 34 are provided on both sides of the covering plate 32, and the positions of each buckle block 34 and the first buckle groove 24 on each first folding plate 21 correspond one by one.

[0101] In this way, the covering plate 32 is buckled into the packaging box and extends vertically to the bottom plate 1. The buckle blocks 34 on the covering plate 32 can be buckled into the first buckle grooves 24 of the first folding plates 21 respectively, effectively increasing the connection parts between the covering plate 32 and the first folding plates 21, thereby improving the structural strength of the packaging box.

[0102] In addition, for the packaging box structure of the embodiment of the present application, when the number of layers of the packaging box is reduced, it means that the covering plate 32 will need to be attached to the bottom plate 1. Since the covering plate 32 is located on the bottom plate 1 and lacks a fixed structure, the covering plate 32 cannot be completely attached to the bottom plate 1 and is easily warped, resulting in an uneven inner bottom surface of the packaging box.

[0103] Here, in another embodiment of the present application, please refer to Fig.23, a buckle block 34 protruding outward is provided on the covering plate 32 of the second enclosure 3. In coordination, a second buckle groove 25 for buckling with the buckle block 34 is provided on the first folding plate 21 connected to the bottom plate 1. The second buckle groove 25 can preferably be a long strip hole horizontally arranged on the first folding plate 21, and the second buckle groove 25 is arranged near the connection between the first folding plate 21a and the bottom plate 1.

[0104] In this way, when the covering plate 32 is attached to the bottom plate 1, the buckle block 34 is buckled with the second buckle groove 25 on the first folding plate 21, so that the covering plate 32 can be tightly attached to the bottom plate 1, preventing the covering plate 32 from easily warping up, and effectively ensuring the flatness of the bottom surface of the packaging box.

[0105] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A packaging box, characterized in that: include: A rectangular bottom plate, the bottom plate having two opposite first edges and two other opposite second edges; A first enclosure is symmetrically connected to the first edges on both sides, the first enclosure includes a plurality of first folding plates connected in sequence, and first movable ribs are provided between adjacent first folding plates, so that adjacent first folding plates can be folded in two directions; folding pieces are connected to both side ends of each first folding plate, and second movable ribs are provided between the folding pieces and the ends of the first folding plates, so that the folding pieces can be folded in two directions on the ends of the first folding plates; The second enclosure is symmetrically connected to the second edges on both sides, and includes a plurality of second folding plates connected in sequence and a covering plate connected to the outermost second folding plates, and the number of the second folding plates is the same as that of the first folding plates; third movable ribs are provided between adjacent second folding plates to enable adjacent second folding plates to be folded in two directions; the covering plate is used to cover the second folding plates, and fourth movable ribs are provided between the covering plate and the outermost second folding plate to enable the covering plate to be folded in two directions on the end of the outermost second folding plate.

2. The packaging box according to claim 1, characterized in that: The first enclosure includes an even number of the first folding plates, and the areas of the first folding plates are the same; the second enclosure includes the same number of the second folding plates as the first folding plates, and the areas of the second folding plates are the same as those of the first folding plates.

3. The packaging box according to claim 2, characterized in that: The area of ​​the covering plate is equal to the sum of the areas of the plurality of second folding plates, and the area of ​​the covering plate is the same as that of the bottom plate.

4. The packaging box according to claim 1, characterized in that: The first enclosure includes an even number of the first folding plates, and a first sub-plate connected to the outermost first folding plate, the first sub-plate having an area smaller than the first folding plate and capable of being folded on an adjacent first folding plate; The second enclosure panel includes the same number of second folding plates as the first folding plates, and a second sub-plate connected between the second folding plates and the covering plate, the area of ​​the second sub-plate is smaller than the adjacent second folding plates and the same as the area of ​​the first sub-plate, and the second sub-plate can be folded onto the adjacent second folding plates; the covering plate includes a third folding plate movably connected to the second sub-plate, and the area of ​​the third folding plate is the same as that of the second sub-plate.

5. The packaging box according to claim 4, characterized in that: The folding sheets are also provided at both side ends of the first sub-plate; the area of ​​the covering plate is equal to the sum of the areas of the plurality of second folding plates and the second sub-plate.

6. The packaging box according to claim 1, characterized in that: The base plate is rectangular, and has two opposite long sides and two opposite short sides; the first enclosure is symmetrically connected to the two short sides of the base plate, and the second enclosure is symmetrically connected to the two long sides of the base plate.

7. The packaging box according to claim 1, characterized in that: A buckle block is provided on the covering plate; a first buckle groove for buckling with the buckle block is provided on the first folding plate connected to the bottom plate, and the first buckle groove matches the position of the buckle block.

8. The packaging box according to claim 7, characterized in that: The first buckle groove is provided on each of the first folding plates, buckle blocks are provided on both sides of the covering plate, and each of the buckle blocks corresponds to the position of the first buckle groove on each of the first folding plates.

9. The packaging box according to claim 1, characterized in that: A buckle block is provided on the covering plate; a second buckle groove for buckling with the buckle block is provided on the first folding plate connected to the bottom plate, and the second buckle groove is arranged near the connection between the first folding plate and the bottom plate.

10. The packaging box according to any one of claims 1 to 9, characterized in that: The bottom plate, the first enclosure plate and the second enclosure plate are all made of corrugated material.

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