Packaging box

Abstract

The utility model 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 application belongs to the technical field of packaging, and particularly relates to a packaging box with adjustable height and size. BACKGROUND

[0002] In the delivery stage of production, products such as electronic products need to be packaged, such as using a packaging box to package products, so as to facilitate the carrying and logistics transportation of the products. In actual application, different products have different sizes, or the number of products that need to be delivered together is different, resulting in differences in the overall size of the products that need to be packaged. At this time, the commonly used solution is to prepare multiple packaging boxes of different sizes in advance, so as to select according to the volume and number of products. Multiple specifications of packaging boxes will increase the storage space and production cost.

[0003] It can be seen that the packaging boxes on the market cannot adjust the size and have low applicability, which does not meet the needs of current logistics applications. CONTENT OF THE UTILITY MODEL

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

[0005] To achieve the above-mentioned purpose, the technical scheme adopted by the application is to provide a packaging box, comprising:

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

[0007] a first surrounding plate symmetrically connected to the two first edges, the first surrounding plate comprising a plurality of first folding plates connected in sequence, a first movable joint being arranged between adjacent first folding plates to enable the adjacent first folding plates to be folded in two directions; a folding piece being connected to both sides of each first folding plate, a second movable joint being arranged between the folding piece and the end of the first folding plate to enable the folding piece to be folded in two directions on the end of the first folding plate;

[0008] a second surrounding plate symmetrically connected to the two second edges, the second surrounding plate comprising a plurality of second folding plates connected in sequence and a cladding plate connected to the outermost second folding plate, the number of the second folding plates being the same as that of the first folding plates; a third movable joint being arranged between adjacent second folding plates to enable the adjacent second folding plates to be folded in two directions; the cladding plate being used to be cladded on the second folding plates, a fourth movable joint being arranged between the cladding plate and the outermost second folding plate to enable the cladding plate to be folded in two directions on the end of the outermost second folding plate.

[0009] The packaging box provided by the application has the beneficial effects that, compared with the prior art, the packaging box structure of the application comprises a bottom plate, first surrounding plates on opposite sides of the bottom plate, and second surrounding plates on the other opposite sides, the first surrounding plates comprise a plurality of first folding plates, the second surrounding plates comprise a plurality of second folding plates with the same number as the first folding plates and a cladding plate, and each adjacent folding plate can be folded in two directions. In this way, the height of the surrounding plate can be increased when adjacent folding plates are unfolded, or the height of the surrounding plate can be reduced when adjacent folding plates are folded, so that the height of the packaging box is quickly adjusted, and the overall volume of the packaging box is changed.

[0010] In order to ensure the stability of the adjusted packaging box structure, the two side ends of the first folding plate each have a folding piece that can be folded in two directions on the end of the first folding plate, so that when adjacent first folding plates are unfolded or folded, the folding piece can extend to the adjacent second folding plate and be cladded by the second folding plate and / or the cladding plate, thereby locking the form of the packaging box and improving the structural stability of the packaging box.

[0011] The packaging box of the embodiment of the application adopts its own folding structure, quickly changes the form of the packaging box by switching the folding mode, does not need to be fixed by using auxiliary tools such as glue and nailing, can be repeatedly used, and effectively reduces the production cost. The packaging box of the embodiment of the application can flexibly change the form of the packaging box according to the size and quantity of the goods to be transported, thereby adjusting the size of the packaging box and effectively meeting the needs of the carriers.

[0012] The structure of the packaging box is improved, the first surrounding plate comprises an even number of first folding plates, each first folding plate has the same area, the second surrounding plate comprises an even number of second folding plates with the same number as the first folding plates, and each second folding plate has the same area as each first folding plate. In this way, the form of the packaging box is quickly changed by folding the even number of folding plates, the height of the packaging box is adjusted, and the volume of the packaging box is changed.

[0013] In one embodiment, the area of the cladding plate is equal to the sum of the areas of the plurality of second folding plates, and the area of the cladding plate is the same as that of the bottom plate. On the one hand, each adjacent second folding plate can be unfolded within the cladding range of the cladding plate, thereby ensuring the structural strength of the packaging box; on the other hand, when each adjacent second folding plate is folded, the cladding 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 surrounding plate comprises 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 that of the first folding plate, and the first sub-plate can be folded on the adjacent first folding plate; the second surrounding plate comprises 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 cladding plate, the area of the second sub-plate is smaller than that of the adjacent second folding plate and the same as that of the first sub-plate, and the second sub-plate can be folded on the adjacent second folding plate; the cladding plate comprises a third folding plate movably connected with the second sub-plate, and the area of the third folding plate is the same as that of the second sub-plate. In this way, the sub-plate is added on the basis of the even number of folding plates, thereby realizing the increase of one layer on the basis of the original even number of layers, and further increasing the volume of the packaging box and increasing the adjustable size of the packaging box.

[0015] In one embodiment, both sides of the first sub-plate are also provided with the folding pieces; and the area of the cladding plate is equal to the sum of the areas of the second folding plates and the second sub-plate. When each adjacent second folding plate is unfolded, it can be within the cladding range of the cladding plate, thereby ensuring the structural strength of the packaging box.

[0016] A third improvement is made to the structure of the packaging box, the bottom plate is rectangular, and the bottom plate has opposite long sides and opposite short sides; the first surrounding plate is symmetrically connected to the two short sides of the bottom plate, and the second surrounding plate is symmetrically connected to the two long sides of the bottom plate. In this way, the first surrounding plate with more folding structures is connected to the short sides of the bottom plate, effectively improving the support structure strength of each component of the first surrounding plate after folding, and further improving the structural stability of the entire rectangular packaging box.

[0017] An improvement is made to the connection structure of the cladding plate and the first folding plate, the cladding plate is provided with a buckle, and the first folding plate connected with the bottom plate is provided with a first buckle groove for buckling with the buckle, and the first buckle groove is positionally matched with the buckle. In this way, when each second folding plate of the second surrounding plate is unfolded, the cladding plate is buckled into the packaging box and vertically extends to the bottom plate, and the buckle is buckled and fixed with the first buckle groove, so that the cladding plate and the first folding plate are connected with each other, preventing the cladding plate from being easily separated to cause the packaging box to be disassembled, 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 slot, and the clamping plate is provided with the buckle block on both sides, and each of the buckle blocks corresponds to the first buckle slot on each of the first folding plates. In this way, each buckle block on the clamping plate can be buckled into the first buckle slot of each first folding plate, effectively increasing the connection part of the clamping plate and each first folding plate, thereby improving the structural strength of the packaging box.

[0019] Another improvement is made to the connection structure of the clamping plate and the first folding plate. The clamping plate is provided with a buckle block, and the first folding plate connected with the bottom plate is provided with a second buckle slot for buckling with the buckle block, and the second buckle slot is arranged close to the connection between the first folding plate and the bottom plate. In this way, when the clamping plate is attached to the bottom plate, the buckle block and the second buckle slot on the first folding plate are buckled with each other, so that the clamping plate can be tightly attached to the bottom plate, preventing the clamping plate from easily lifting up, effectively ensuring the flatness of the inner bottom surface of the packaging box.

[0020] In one embodiment, the bottom plate, the first surrounding plate and the second surrounding plate are all made of corrugated material. This 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 DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0022] Figure 1 The expanded state diagram of the packaging box provided by the embodiment of the present application;

[0023] Figure 2 The first size structure diagram of the packaging box provided by the embodiment of the present application;

[0024] Figure 3 The second size structure diagram of the packaging box provided by the embodiment of the present application;

[0025] Figure 4 The expanded state diagram of the first packaging box provided by the embodiment of the present application;

[0026] Figure 5 The first folding stage diagram of the first packaging box provided by the embodiment of the present application;

[0027] Figure 6A second folding stage schematic view of the first size of the first packaging box provided by the embodiment of the present application;

[0028] Figure 7 A structure schematic view of the first size of the first packaging box provided by the embodiment of the present application after folding is completed;

[0029] Figure 8 A first folding stage schematic view of the second size of the first packaging box provided by the embodiment of the present application;

[0030] Figure 9 A second folding stage schematic view of the second size of the first packaging box provided by the embodiment of the present application;

[0031] Figure 10 A structure schematic view of the second size of the first packaging box provided by the embodiment of the present application after folding is completed;

[0032] Figure 11 A schematic view of an unfolded state of the second packaging box provided by the embodiment of the present application;

[0033] Figure 12 A first folding stage schematic view of the first size of the second packaging box provided by the embodiment of the present application;

[0034] Figure 13 A second folding stage schematic view of the first size of the second packaging box provided by the embodiment of the present application;

[0035] Figure 14 A structure schematic view of the first size of the second packaging box provided by the embodiment of the present application after folding is completed;

[0036] Figure 15 A first folding stage schematic view of the second size of the second packaging box provided by the embodiment of the present application;

[0037] Figure 16 A second folding stage schematic view of the second size of the second packaging box provided by the embodiment of the present application;

[0038] Figure 17 A structure schematic view of the second size of the second packaging box provided by the embodiment of the present application after folding is completed;

[0039] Figure 18 A local enlarged schematic view of the second size of the second packaging box provided by the embodiment of the present application after folding is completed;

[0040] Figure 19 A first folding stage schematic view of the third size of the second packaging box provided by the embodiment of the present application;

[0041] Figure 20The second folding stage schematic view of the third size of the second packaging box provided by the embodiment of the present application;

[0042] Figure 21 The structure schematic view of the third size of the second packaging box provided by the embodiment of the present application after folding is completed;

[0043] Figure 22 The local enlarged schematic view of the third size of the second packaging box provided by the embodiment of the present application after folding is completed;

[0044] Figure 23 The local structure schematic view of the packaging box provided by the embodiment of the present application;

[0045] Figure 24 The folding stage structure schematic view of the packaging box provided by the embodiment of the present application.

[0046] In the drawings, various reference signs represent:

[0047] 1 - bottom plate;

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

[0049] 3 - second surrounding plate; 31 - second folding plate; 311 - third movable rib; 32 - covering 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 of the present application clearer, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not 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", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional 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 devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0053] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0054] Traditional packaging boxes are generally foldable flat paper structures, which are convenient to store and save space. The flat paper has folding lines, 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 carrying and logistics transportation.

[0055] In order to change the size of the packaging box, the general thinking in the industry is to increase the expansion part or the height part. In the related art, a mounting part such as a buckle is provided on the body of the packaging box to connect with the added expansion part. When it is necessary to increase the size of the packaging box, the expansion part is added to the body of the packaging box, thereby changing the original size of the packaging box to expand the capacity of the packaging box.

[0056] It can be seen that the expansion part is a separate component that is added to the body of the packaging box when the size needs to be increased. This means that the enterprise needs to purchase the expansion part separately and install it when needed, which is cumbersome to operate. Moreover, the expansion part needs to be stored separately, which increases the occupied space and production cost.

[0057] Therefore, after the applicant's painstaking research, a new type of packaging box structure is designed, which breaks the inherent thinking of industry professionals (the inherent thinking refers to the improvement idea of simply increasing the expansion part to increase the capacity of the packaging box body in order to change the original size of the packaging box), and creatively proposes a new type of packaging box with adjustable height and size and reusable size conversion. The packaging box does not need to increase the expansion part, but only uses its own structure to switch the folding mode, thereby realizing the quick conversion of different height specifications, which is conducive to meeting the use requirements of products of different sizes, effectively solving the problem that the traditional packaging box structure cannot adjust the size, and now it will be described in detail.

[0058] Please refer to Figure 1 , Figure 2 and Figure 3 together, the packaging box comprises a rectangular bottom plate 1, a first surrounding plate 2 and a second surrounding plate 3.

[0059] As shown in Figure 1 , the rectangular bottom plate 1 has opposite two sides of the first edge and the other opposite two sides of the second edge. Among them, the first surrounding plate 2 is symmetrically connected to the first edge of the two sides of the bottom plate 1, and the second surrounding plate 3 is symmetrically connected to the second edge of the other two sides of the bottom plate 1.

[0060] The first surrounding plate 2 comprises a plurality of first folding plates 21 connected in sequence, and a first movable rib 211 is arranged between adjacent first folding plates 21 to enable the adjacent first folding plates 21 to be folded in two directions. The "folded in two directions" here can be understood as that one of the first folding plates 21 can be folded on the front surface of the other first folding plate 21 in the first movable rib 211, or folded on the back surface of the other first folding plate 21 in the first movable rib 211. (The following understanding of folding in two directions is similar)

[0061] The two side ends of each first folding plate 21 are connected with a folding sheet 22, and a second movable rib 221 is arranged between the folding sheet 22 and the first folding plate 21 to enable the folding sheet 22 to be folded in two directions on the end of the first folding plate 21.

[0062] The second surrounding plate 3 comprises a plurality of second folding plates connected in sequence and a cladding plate 32 connected with the outermost second folding plate 31. The "outermost second folding plate 31" here can be understood as the second folding plate 31 away from the bottom plate 1.

[0063] The number of the second folding plate 3 is the same as that of the first folding plate 21, and a third movable rib 311 is arranged between adjacent second folding plates 31 to enable the adjacent second folding plates 31 to be folded in two directions.

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

[0065] The packaging box provided by the embodiment of the present application compared with the prior art, the packaging box structure of the present application comprises a bottom plate 1 and a first surrounding plate 2 and a second surrounding plate 3 on the opposite two sides of the bottom plate 1, the first surrounding plate 2 comprises a plurality of first folding plates 21, the second surrounding plate 3 comprises a plurality of second folding plates 31 with the same number of first folding plates 21 and a cladding plate 32, and each adjacent folding plate can be folded in two directions.

[0066] Therefore, as Figure 2As shown, the height of the surrounding plate can be increased when the adjacent folded plates are unfolded; or, as shown, the height of the surrounding plate can be reduced when the adjacent folded plates are folded, so that the height of the packaging box is quickly adjusted and the overall volume of the packaging box is changed. Figure 3

[0067] In order to ensure the stability of the adjusted packaging box structure, both sides of the first folded plate 21 are provided with a folding piece 22 which can be folded in two directions on the end of the first folded plate 21, so that when the adjacent first folded plates 21 are unfolded or folded, the folding piece 22 can extend to the adjacent second folded plate 31 and be covered by the second folded plate 31 and / or the covering plate 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 expansion part to the original packaging box body in the related art, the packaging box of the embodiment of the application adopts its own folding structure to quickly change the shape of the packaging box by switching the folding mode, without the need for auxiliary tools such as glue and nailing for fixing, and can be repeatedly used, thereby effectively reducing the production cost.

[0069] The packaging box of the embodiment of the application can flexibly change the shape of the packaging box according to the size and quantity of the goods to be transported, thereby adjusting the size of the packaging box and effectively meeting the needs of the carrier.

[0070] Preferably, on the packaging box of the embodiment of the application, the bottom plate 1, the first surrounding plate 2 and the second surrounding plate 3 of the packaging box are all made of corrugated material, and specifically can preferably adopt corrugated paper formed by paper, to realize a full-paper structure, which is conducive to storage and storage and saves space.

[0071] The corrugated paper is formed by the hanging paper and the wave-shaped corrugated paper processed by the corrugated roller, and is a plate-shaped object formed by adhesion. The corrugated paper has the advantages of low cost, light weight, easy processing, high strength, excellent printing adaptability, convenient storage and transportation, etc., and can be recycled and reused, which is conducive to cost saving.

[0072] The corrugated paper includes single-layer paper specifications and double-layer paper specifications, and can be determined according to the overall size of the packaging box of the embodiment of the application, specifically according to the number of the first folded plate 21 and the second folded plate 31. The packaging box with a small number of first folded plates 21 and second folded plates 31 (such as two layers or three layers or less) can be made of single-layer corrugated paper; and the packaging box with a large number of first folded plates 21 and second folded plates 31 (such as four layers or five layers or more) can be made of double-layer corrugated paper, thereby being conducive to ensuring the foldable flexibility of each folded plate and improving the structural strength of the folded packaging box.

[0073] ​The packaging box structure provided by the embodiments 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 a single number of foldable layers and a packaging box structure with a double number of foldable layers, which will be described below respectively.

[0074] Embodiment one

[0075] For the packaging box structure with a double number of foldable layers, please refer to Figure 4 , the first surrounding plate 2 of the packaging box includes a double number of first folding plates 21, and the area of each first folding plate 21 is the same. The second surrounding plate 3 of the packaging box includes a double number of second folding plates 31, and the area of each second folding plate 31 is the same as that of each first folding plate 21.

[0076] In this way, by folding the double number of folding plates, 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.

[0077] As an example, please refer to 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 surrounding plates 2, the first surrounding plate 2 includes two first folding plates 21 connected with the bottom plate 1 in sequence, and the two first folding plates 21 have a first movable rib 211 therebetween, so that the two first folding plates 21 can be folded or unfolded with respect to each other.

[0078] Among them, the two side ends of the first folding plate 21 have folding pieces 22, the area of the folding piece 22 is smaller than that of the first folding plate 21, and the folding piece 22 and the end of the first folding plate 21 have a second movable rib 221 therebetween, so that the folding piece 22 can be folded in two directions on the end of the first folding plate 21.

[0079] The other opposite sides of the bottom plate 1 of the packaging box are respectively connected with symmetrically arranged second surrounding plates 3, the second surrounding plate 3 includes two second folding plates 31 and a cladding plate 32 connected with the bottom plate 1 in sequence, the area of the second folding plate 31 is the same as that of the first folding plate 21, and the two second folding plates 31 have a third movable rib 311 therebetween, so that the two second folding plates 31 can be folded or unfolded with respect to each other according to the folding mode of the first folding plate 21. The cladding plate 32 and the outermost second folding plate 31 have a fourth movable rib 321 therebetween, so that the cladding plate 32 can be folded in two directions on the end of the second folding plate 31.

[0080] As shown in Figure 4 , the initial state of the packaging box is a flat sheet. In use, please refer to Figure 5 , Figure 6 and Figure 7The first surrounding plate 2 on both sides of the bottom plate 1 is folded towards the bottom plate 1 first, so that the first surrounding plate 2 stands up. Specifically, the two first folding plates (21a, 21b) of the first surrounding plate 2 remain unfolded, and the folding pieces (22a, 22b) on both sides of each first folding plate (21a, 21b) are folded inwards, so that the first folding plate 21 and the folding pieces 22 on both sides form a three-sided frame structure. Then, the second surrounding plate 3 is folded towards the bottom plate 1, so that the two second folding plates (31a, 31b) in the second surrounding plate 3 are folded and cover the folding pieces (22a, 22b) on both sides. Finally, the covering plate 32 is attached to the second folding plates (31a, 31b) and the folding pieces (22a, 22b) mentioned above, 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 unfolded within the covering range of the covering plate 32, ensuring the structural strength of the packaging box.

[0082] When the size is changed, as shown in Figure 4 , the initial state of the packaging box is a flat sheet. Please refer to Figure 8 , Figure 9 and Figure 10 , the first surrounding plate 2 on both sides of the bottom plate 1 is folded towards the bottom plate 1 first, so that the first surrounding plate 2 stands up. Specifically, the two first folding plates (21a, 21b) of the first surrounding plate 2 are folded with each other, specifically, the outermost first folding plate 21b is folded towards the inside of the packaging box, so that it is stacked on the first folding plate 21a connected with the bottom plate 1. Among them, the folding pieces 22a on both sides of the first folding plate 21a connected with the bottom plate 1 are folded inwards, so that they form an inward three-sided frame structure; the folding pieces 22b on both sides of the outermost first folding plate 21b are folded outwards, so that they form an outward three-sided frame structure and are stacked in the above-mentioned inward three-sided frame structure, so that the folding pieces 22b and the folding pieces 22a overlap with each other. Then, the second surrounding plate 3 is folded towards the bottom plate 1, so that the two second folding plates (31a, 31b) in the second surrounding plate 3 are folded with each other and cover the above-mentioned folding pieces (22a, 22b). Finally, the covering plate 32 is attached to the bottom plate 1, thereby forming a packaging box with a single-layer structure.

[0083] Preferably, the area of the covering plate 32 is equal to the area 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, ensuring the flatness of the inner bottom surface of the packaging box.

[0084] Example Two

[0085] For the packaging box structure with a single number of foldable layers, please refer to Figure 11The first side plate 2 of the packaging box comprises 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 being smaller than that of the adjacent first folding plate 21, and the first sub-plate 23 being foldable on the adjacent first folding plate 21.

[0086] The second side plate 3 of the packaging box comprises an even number of second folding plates 31, and a second sub-plate 33 connected between the second folding plate 31 and the cover plate 32, the area of the second sub-plate 33 being smaller than that of the adjacent second folding plate 31 and equal to that of the first sub-plate 23, and the second sub-plate 33 being foldable on the adjacent second folding plate 31.

[0087] The cover plate 32 comprises a third folding plate 322 movably connected to the second sub-plate 33, the area of the third folding plate 322 being equal to that of the second sub-plate 33.

[0088] In this way, the sub-plate is added on the basis of the even number of folding plates, so that one layer is added on the basis of the original even number of layers, and the volume of the packaging box is further increased and the adjustable size of the packaging box is increased.

[0089] As shown in Figure 11 , the opposite sides of the bottom plate 1 of the packaging box are respectively connected with symmetrically arranged first side plates 2, the first side plate 2 comprising two first folding plates (21a, 21b) and a first sub-plate 23 connected in sequence to the bottom plate 1, the area of the first sub-plate 23 being smaller than that of the adjacent first folding plate 21b, and the first sub-plate 23 being foldable on the adjacent first folding plate 21b. The two side ends of each first folding plate (21a, 21b) and the first sub-plate 23 are respectively connected with folding pieces (22a, 22b, 22c).

[0090] The other opposite sides of the bottom plate 1 of the packaging box are respectively connected with symmetrically arranged second side plates 3, the second side plate 3 comprising two second folding plates (31a, 31b), a second sub-plate 33 and a cover plate 32 connected in sequence to the bottom plate 1, the area of the second sub-plate 33 being smaller than that of the adjacent second folding plate 31b.

[0091] As shown in Figure 11 , the initial state of the packaging box is a flat sheet. When in use, please refer to Figure 12 , Figure 13 and Figure 14First, the first side panels 2 on both sides of the base plate 1 can be folded towards the base plate 1 to make the first side panels 2 stand upright. Specifically, the two first folding plates (21a, 21b) and the first sub-plate 23 of the first side panel 2 are all 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 all folded inward so that the first folding plates (21a, 21b) and the first sub-plate 23, together with the folding pieces (22a, 22b, 22c) on both sides, form an inward three-sided frame structure. Then, the second side panel 3 is folded towards the base plate 1 to make the second side panel 3 stand upright. Specifically, the two second folding plates (31a, 31b) and the second sub-plate 33 of the second side panel 3 are all unfolded and abut against the folding pieces (22a, 22b, 22c) on both sides. Finally, the covering plate 32 is fastened to the second folding plate (31a, 31b), the second sub-plate 33, and the folding piece 22, thereby forming 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 when each of the second folding plates 31 and the second sub-plate 33 is unfolded, it can be within the coverage area of ​​the covering plate 32, thus ensuring the structural strength of the packaging box.

[0093] In the first type of deformation that changes size, such as Figure 11 As shown, the initial state of the packaging box is a flat sheet of paper. Please refer to the attached document. Figure 15 , Figure 16 and Figure 17 First, the first side panels 2 on both sides of the base plate 1 can be folded towards the base plate 1 to make the first side panels 2 stand upright. Specifically, the two first folding plates (21a, 21b) of the first side panel 2 remain unfolded, and the first sub-plate 23 is folded into the packaging box so that it overlaps the adjacent first folding plate 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-sided frame structure; the folding pieces 22c on both sides of the first sub-plate 23 are folded outward to form an outward three-sided frame structure, and then folded inward and overlapped on the adjacent inward three-sided frame structure so that the folding pieces 22c overlap the folding pieces b. Then, as... Figure 17 and Figure 18 As shown, the second enclosure panel 3 is folded towards the base plate 1 so that the two second folding plates (31a, 31b) in the second enclosure panel 3 remain unfolded. The second sub-plate 33 is folded onto the adjacent second folding plate 31b and fastened to the adjacent second folding plate 31b, so that the aforementioned folding pieces (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 stacked on the second sub-plate 33; finally, as... Figure 18As shown, the covering plate 32 is folded in the same direction as the third folding plate 322, 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 double-layered packaging box.

[0094] In the second size-changing deformation, as shown in Figure 11 As shown, the initial state of the packaging box is a flat sheet. Please refer to Figure 19 , Figure 20 and Figure 21 , the first surrounding plate 2 on both sides of the bottom plate 1 is folded towards the bottom plate 1, so that the first surrounding plate 2 stands up. Specifically, the two first folding plates (21a, 21b) of the first surrounding plate 2 are folded with each other, wherein the folding piece 22a on the first folding plate 21a is folded inward to form an inward three-edge frame structure; the folding piece 22b on the first folding plate 21b is folded outward to form an outward three-edge frame structure, which is folded towards the bottom plate 1 and stacked on the inward three-edge 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, so as to be attached to the bottom plate 1; the folding pieces 22c on both ends of the first sub-plate 23 overlap the folding pieces 22b. Then, as shown in Figure 20 and Figure 21 , the second surrounding plate 3 is folded towards the bottom plate 1, so that the two second folding plates (31a, 31b) in the second surrounding plate 3 are folded with each other and wrapped around the folding pieces (22a, 22b, 22c) described above. Finally, as shown in Figure 22 , the second sub-plate 33 needs to be folded in the packaging box, and the third folding plate 322 on the covering plate 32 is also folded with the second sub-plate 33, so that the covering plate 32 can be flatly attached to the bottom plate 1, thereby forming a single-layered packaging box, 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 cuboid packaging box, in another embodiment of the present application (not shown in the figure), the bottom plate 1 is preferably rectangular, and the bottom plate 1 has opposite two long sides and opposite two short sides. The first surrounding plate 2 is symmetrically connected to the two short sides of the bottom plate 1, and the second surrounding plate 3 is symmetrically connected to the two long sides of the bottom plate 1.

[0096] In this way, the first surrounding plate 2 with more folding structures is connected to the short sides of the bottom plate 1, effectively improving the strength of the support structure formed by folding each component of the first surrounding plate 2, and further improving the structural stability of the entire cuboid packaging box.

[0097] In actual application, due to the packaging box structure of the embodiment of the present application, the components between the first surrounding plate 2 and the second surrounding plate 3 do not need to be fixed by auxiliary tools such as glue or nailing, and therefore the fixing structure of the second surrounding plate 3 to the first surrounding plate 2 is particularly important, otherwise the packaging box structure formed by folding is easy to be disassembled, which affects the overall structural stability of the packaging box.

[0098] Herein, in one embodiment of the present application, please refer to Figure 23 and Figure 24 , the clamping block 34 is outwardly protruding on the cladding plate 32 of the second surrounding plate 3. Correspondingly, the first clamping groove 24 for clamping the clamping block 34 is provided on the first folding plate 21a connected to the bottom plate 1, which can be preferably a long hole vertically provided on the first folding plate 21, and the shape of the clamping block 34 is matched with the shape of the first clamping groove 24 and the positions are corresponding.

[0099] Therefore, when each of the second folding plates 31 of the second surrounding plate 3 is unfolded, the cladding plate 32 is clamped into the packaging box and vertically extended to the bottom plate 1, and the clamping block 34 is clamped and fixed with the first clamping groove 24, so that the cladding plate 32 and the first folding plate 21 are connected with each other, preventing the cladding plate 32 from being easily separated to cause the packaging box to be disassembled, and effectively ensuring the structural stability of the packaging box.

[0100] Preferably, in another embodiment of the present application, please refer to Figure 24 , the first clamping groove 24 is provided on each of the first folding plates 21; correspondingly, the clamping block 34 is provided on both sides of the cladding plate 32, and each clamping block 34 is corresponding to the first clamping groove 24 on each first folding plate 21.

[0101] Therefore, the cladding plate 32 is clamped into the packaging box and vertically extended to the bottom plate 1, and each clamping block 34 on the cladding plate 32 can be clamped into the first clamping groove 24 of each first folding plate 21, effectively increasing the connection position of the cladding plate 32 and each first folding plate 21, and further 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 cladding plate 32 will need to be attached to the bottom plate 1. Since the cladding plate 32 lacks a fixing structure on the bottom plate 1, the cladding plate 32 cannot be completely attached to the bottom plate 1 and is easy to be warped, resulting in uneven inner bottom surface of the packaging box.

[0103] Herein, in another embodiment of the present application, please refer to Figure 23, the clasp block 34 is outwardly protruded. Correspondingly, the first folding plate 21 connected with the bottom plate 1 is provided with a second clasp groove 25 for clasp connection with the clasp block 34, which can be preferably a long hole transversely arranged on the first folding plate 21, and the second clasp groove 25 is arranged close to the connecting position of the first folding plate 21a and the bottom plate 1.

[0104] In this way, when the cladding plate 32 is attached to the bottom plate 1, the clasp block 34 and the second clasp groove 25 on the first folding plate 21 are clasp connected with each other, so that the cladding plate 32 can be tightly attached to the bottom plate 1, preventing the cladding plate 32 from easily being warped, and effectively ensuring the flatness of the inner bottom surface of the packaging box.

[0105] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A packaging box, characterized in that, The utility model relates to a rectangular bottom plate has opposite two side first edges and another opposite two side second edges, first enclosure board is connected on the two side first edges symmetrically, and the first enclosure board includes a plurality of first folding plates connected in sequence, and first movable tendon is arranged between adjacent first folding plates, and adjacent first folding plates can be folded in two directions, folding piece is connected on both side ends of each first folding plate, and second movable tendon is arranged between the folding piece and the end of first folding plate, and the folding piece can be folded in two directions on the end of first folding plate, second enclosure board is connected on the two side second edges symmetrically, and the second enclosure board includes a plurality of second folding plates connected in sequence and covering plate connected with the outermost second folding plate, and the number of second folding plate is same with first folding plate, third movable tendon is arranged between adjacent second folding plates, and adjacent second folding plates can be folded in two directions, and the covering plate is used to cover on the second folding plate, and fourth movable tendon is arranged between the covering plate and the outermost second folding plate, and the covering plate can be folded in two directions on the end of the outermost second folding plate. The first enclosure board includes an even number of first folding plates, and the area of each first folding plate is same, and the second enclosure board includes the same number of second folding plates as the first folding plates, and the area of each second folding plate is same with the area of each first folding plate. 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 same with the bottom plate. The first enclosure board includes an even number of first folding plates, and the area of each first folding plate is same, and the second enclosure board includes the same number of second folding plates as the first folding plates, and the area of each second folding plate is same with the area of each first folding plate.

2. The packaging box according to claim 1, characterized in that: The first enclosure board includes an even number of first folding plates, and the area of each first folding plate is same, and the second enclosure board includes the same number of second folding plates as the first folding plates, and the area of each second folding plate is same with the area of each first folding plate.

3. The packaging box according to claim 2, characterized in that: The first enclosure board includes an even number of first folding plates, and the area of each first folding plate is same, and the second enclosure board includes the same number of second folding plates as the first folding plates, and the area of each second folding plate is same with the area of each first folding plate.

4. The packaging box according to claim 1, characterized in that: The first enclosure board includes an even number of first folding plates, and the area of each first folding plate is same, and the second enclosure board includes the same number of second folding plates as the first folding plates, and the area of each second folding plate is same with the area of each first folding plate. The first enclosure board includes an even number of first folding plates, and the area of each first folding plate is same, and the second enclosure board includes the same number of second folding plates as the first folding plates, and the area of each second folding plate is same with the area of each first folding plate.

5. The packaging box according to claim 4, characterized in that: The first enclosure board includes an even number of first folding plates, and the area of each first folding plate is same, and the second enclosure board includes the same number of second folding plates as the first folding plates, and the area of each second folding plate is same with the area of each first folding plate.

6. The packaging box according to claim 1, characterized in that: The first enclosure board includes an even number of first folding plates, and the area of each first folding plate is same, and the second enclosure board includes the same number of second folding plates as the first folding plates, and the area of each second folding plate is same with the area of each first folding plate.

7. The packaging box according to claim 1, characterized in that: The first enclosure board includes an even number of first folding plates, and the area of each first folding plate is same, and the second enclosure board includes the same number of second folding plates as the first folding plates, and the area of each second folding plate is same with the area of each first folding plate. The first enclosure board includes an even number of first folding plates, and the area of each first folding plate is same, and the second enclosure board includes the same number of second folding plates as the first folding plates, and the area of each second folding plate is same with the area of each first folding plate. The first enclosure board includes an even number of first folding plates, and the area of each first folding plate is same, and the second enclosure board includes the same number of second folding plates as the first folding plates, and the area of each second folding plate is same with the area of each first folding plate. The first enclosure board includes an even number of first folding plates, and the area of each first folding plate is same, and the second enclosure board includes the same number of second folding plates as the first folding plates, and the area of each second folding plate is same with the area of each first folding plate. The first enclosure board includes an even number of first folding plates, and the area of each first folding plate is same, and the second enclosure board includes the same number of second folding plates as the first folding plates, and the area of each second folding plate is same with the area of each first folding plate. The first enclosure board includes an even number of first folding plates, and the area of each first folding plate is same, and the second enclosure board includes the same number of second folding plates as the first folding plates, and the area of each second folding plate is same with the area of each first folding plate. The first enclosure board includes an even number of first folding plates, and the area of each first folding plate is same, and the second enclosure board includes the same number of second folding plates as the first folding plates, and the area of each second folding plate is same with the area of each first folding plate. The first enclosure board includes an even number of first folding plates, and the area of each first folding plate is same, and the second enclosure board includes the same number of second folding plates as the first folding plates, and the area of each second folding plate is same with the area of each first folding plate. The first enclosure board includes an even number of first folding plates, and the area of each first folding plate is same, and the second enclosure board includes the same number of second folding plates as the first folding plates, and the area of each second folding plate is same with the area of each first folding plate. The first enclosure board includes an even number of first folding plates, and the area of each first folding plate is same, and the second enclosure board includes the same number of second folding plates as the first folding plates, and the area of each second folding plate is same with the area of each first folding plate. The first enclosure board includes an even number of first folding plates, and the area of each first folding plate is same, and the second enclosure board includes the same number of second folding plates as the first folding plates, and the area of each second folding plate is same with the area of each first folding plate. The first enclosure board includes an even number of first folding plates, and the area of each first folding plate is same, and the second enclosure board includes the same number of second folding plates as the first folding plates, and the area of each second folding plate is same with the area of each first folding plate. The first enclosure board includes an even number of first folding plates, and the area of each first folding plate is same, and the second enclosure board includes the same number of second folding plates as the first folding plates, and the area of each second folding plate is same with the area of each first folding plate. The first enclosure board includes an even number of first folding plates, and the area of each first folding plate is same, and the second enclosure board includes the same number of second folding plates as the first folding plates, and the area of each second folding plate is same with the area of each first folding plate. The first enclosure board includes an even number of first folding plates, and the area of each first folding plate is same, and the second enclosure board includes the same number of second folding plates as the first folding plates, and the area of each second folding plate is same with the area of each first folding plate. The first enclosure board includes an even number of first folding plates, and the area of each first folding plate is same, and the second enclosure board includes the same number of second folding plates as the first folding plates, and the area of each second folding plate is same with the area of each first folding plate. The first enclosure board includes an even number of first folding plates, and the area of each first folding plate is same, and the second enclosure board includes the same number of second folding plates as the first folding plates, and the area of each second folding plate is same with the area of each first folding plate. The first enclosure board includes an even number of first folding plates, and the area of each first folding plate is same, and the second enclosure board includes the same number of second folding plates as the first folding plates, and the area of each second folding plate is same with the area of each first folding plate. The first enclosure board includes an even number of first folding plates, and the area of each first folding plate is same, and the second enclosure board includes the same number of second folding plates as the first folding plates, and the area of each second folding plate is same with the area of each first folding plate. The first enclosure board includes an even number of first folding plates, and the area of each first folding plate is same, and the second enclosure board includes the same number of second folding plates as the first folding plates, and the area of each second folding plate is same with the area of each first folding plate. The first enclosure board includes an even number of first folding plates, and the area of each 8. The packaging box according to claim 7, characterized in that: The first folding plate is provided with the first buckle slot, and the clamping block is arranged on the two sides of the cladding plate.

9. The packaging box according to claim 1, characterized in that: The cladding plate is provided with the clamping block, and the first folding plate connected with the bottom plate is provided with the second buckle slot for buckling with the clamping block.

10. The package of any one of claims 1 to 9, wherein: The bottom plate, the first surrounding plate and the second surrounding plate are made of corrugated material.

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