WO2023100020A1

WO2023100020A1 - An inner support structure of a packaging box with variable size and a packaging box

Info

Publication number: WO2023100020A1
Application number: PCT/IB2022/061128
Authority: WO
Inventors: Xiangrui WANG; Jinglun CUI; Yanyuan FANG
Original assignee: Stora Enso Oyj
Priority date: 2021-11-30
Filing date: 2022-11-18
Publication date: 2023-06-08
Also published as: CN116198820A

Abstract

The present disclosure relates to an inner support structure for forming a packaging box inner support, a packaging box inner support formed by the inner support structure, a structure comprising the inner support structure and used for forming a packaging box, and a packaging box. The inner support structure comprises an inner support bottom surface, a first side extending from a first side edge of the inner support bottom surface, and a second side extending from a second side edge of the inner support bottom surface opposite to the first side edge. Wherein the inner support structure also comprises a first side second folding line, as first side second folding line, a first side third folding line, a second side first folding line, a second said second folding line and a second said third folding line, wherein the dimension of the first side from the first side first folding line to the first side free edge is smaller than that of the second side from the second side first folding line to the second side free edge.

Description

AN INNER SUPPORT STRUCTURE OF A PACKAGING BOX WITH VARIABLE SIZE AND A PACKAGING BOX

Technical field

The present disclosure relates to a packaging box, in particular to logistics packaging boxes for logistics. Specifically, the present disclosure relates to an inner support structure for forming a packaging box inner support, a packaging box inner support formed by the inner support structure, a structure comprising the inner support structure and used for forming a packaging box, and a packaging box.

Background

At present, the packaging boxes available in the market, especially the logistics boxes used for logistics, are all custom-sized, which are only suitable for accommodating products with the same size; or the packaging boxes available in the market can only have a common outer box, while need to be matched with different inner supporting members to stably protect the accommodated products. There is a desire for a packaging box that can satisfy products with different sizes.

In addition, at present, the cushioning materials in the packaging boxes on the market are mostly EPE, foam holder, bubble bag, etc., which cause great environmental pollution. With the requirements of the global plastic limit order, such cushioning materials will gradually be banned in the future.

It is desired that there is a buffer structure inside the packaging box, which is environment-friendly and pollution-free, and can meet harsh transportation environment. In addition, it is desired that the packaging box and the buffer structure inside the packaging box can be assembled and formed simply and conveniently.

Summary of the invention

In view of the above-mentioned problems and demands, this disclosure proposes a new type of inner support structure, which solves the above-mentioned problems and brings other technical effects by adopting the following technical features.

The present disclosure first proposes an inner support structure for forming an inner support of a packing box, comprising an inner support bottom surface, a first side extending from a first side edge of the inner support bottom surface, and a second side extending from a second side edge of the inner support bottom surface opposite to the first side edge, wherein the inner support structure further comprises: a first side first folding line located between the first side and the bottom surface of the inner bracket; a first side second folding line located in the first side and parallel to the first side first folding line; a first side third folding line located in the first side, parallel to the first side first folding line and the first side second folding line, and farther from the first side first folding line than the first side second folding line; a second side first folding line located between the second side and the bottom surface of the inner bracket; a second side second folding line located in the second side and parallel to the second side first folding line; a second side third folding line located in the second side, parallel to the second side first folding line and the second side second folding line, and farther from the second side first folding line than the second side second folding line; wherein the dimension of the first side from the first side first folding line to the first side free edge is smaller than that of the second side from the second side first folding line to the second side free edge.

According to some embodiments, when forming an inner support of packaging box of a first size, the first side is folded only at the first side first folding line and the first side third folding line to form an L-shaped structure, and the second side is folded at the second side first folding line and the second side second folding line and the second side third folding line to form an U-shaped structure.

According to some embodiments, when forming an inner support of packaging box of a second size larger than the first size, the first side is folded at the first side first folding line, the first side second folding line and the first side third folding line to form a U-shaped structure, and the second side is only folded at the second side first folding line and the second side second folding line to form an L- shaped structure.

According to some embodiments, when forming an inner support of packaging box of a third size larger than the second size, the first side is folded only at the first side first folding line and the first side third folding line to form an L-shaped structure, and the second side is only folded at the second side first folding line and the second side second folding line to form an L-shaped structure.

According to some embodiments, the dimension of the first side from the first side first folding line to the first side third folding line is equal to the dimension of the second side from the second side first folding line to the second side second folding line.

According to some embodiments, the inner support bottom surface further comprises a third side edge and a fourth side edge opposite to each other, and the inner support structure comprises a first buffer side extending from the third side edge of the inner support bottom surface and a second buffer side extending from the fourth side edge of the inner support bottom surface.

According to some embodiments, the distal edge of the first buffer side and the distal edge of the second buffer side are both provided with notches.

According to some embodiments, the distal edge of the first buffer side and the distal edge of the second buffer side are both provided with two notches.

According to some embodiments, the first buffer side and the second buffer side are both double-layer structures.

The present disclosure further proposes an inner support of a packaging box, which is formed by the inner support structure as described above.

The present disclosure further proposes a structure for forming a packaging box comprising the inner support structure as described above and an outer box structure for forming an outer box of the packaging box, wherein the outer box structure is configured to wrap the inner support of the packaging box formed by the inner support structure.

According to some embodiments, the outer box structure comprises a first part and a second part, wherein the side edge of the first part is adjacent to the side edge of the second part. Wherein the second part comprises a triangular area defined by a triangular area first folding line, a triangular area second folding line and a triangular area breaking line, wherein the adjacent sides of the first part and the second part are connected with each other only at the triangular area first folding line; Wherein the second part can rotate 90 degrees relative to the first part; during the rotation, the second part is folded at the triangular area first folding line and the triangular area second folding line; and after the rotation, the triangular area is sandwiched between the first part and the second part.

According to some embodiments, the second part comprises a second part bottom surface, two first folding faces connected to the second part bottom surface by two first folding lines respectively, and two second folding faces connected to the two first folding faces by two second folding lines respectively.

According to some embodiments, the distal end of each second folding face has an engagement protrusion protruding laterally thereof.

According to some embodiments, the engaging protrusion is configured to be engaged in a notch of the distal edge of first buffer side or second buffer side of the inner support structure.

According to some embodiments, the dimension of the second part bottom surface between the two first folding lines is smaller than the width of the first part.

The present disclosure also provides a packaging box, which is formed by the structure described above.

Hereinafter, a more detailed description of the optimal embodiments for implementing the present disclosure will be given with reference to the accompanying drawings, so that the features and advantages of the present disclosure can be easily understood.

Brief description of the figures

In order to explain the technical solutions of the embodiments of the invention more clearly, the drawings of the embodiments of the invention will be briefly introduced below. The drawings are only used to show some embodiments of the present invention, but not to limit all the embodiments of the present invention. Fig. 1 shows a structure for forming a packaging box proposed by the present disclosure, wherein the structure is in an original state; Figs. 2A-2B show the structure for forming a packaging box proposed in this disclosure, in which the inner support structure is gradually folded into a packaging box inner support of a first size ; Figs. 3A-3B show the structure for forming a packaging box proposed in this disclosure, in which the inner support structure is gradually folded into a packaging box inner support with a second size;

Figs. 4A-4B show the structure for forming a packaging box proposed in the present disclosure, in which the inner support structure is gradually folded into a packaging box inner support with a third size ;

Fig. 5 shows the mating between the engagement protrusion of the outer box structure and the notches of the first buffer side and the second buffer side of the inner support structure;

Fig. 6 shows the formed packaging box;

Figs. 7A-7C respectively show the key steps of folding the outer box structure into an outer box.

List of reference signs

100 An inner support bottom surface

110 A first side first folding line

120 A first side second folding line

130 A first side third folding line

140 A second side first folding line

150 A second side second folding line

160 A second side third folding line

170 A first side

171 A first side free edge 180 A second side

181 A second side free edge

190 A first buffer side

191 A second buffer side

192 A notch

210 A first part

220 A second part

221 A second part bottom surface

222 A first folding face

223 A second folding face

224 A first folding line

225 A second folding line

226 An engaging protrusion

230 A triangular area

231 A triangular area first folding line

232 A triangular area second folding line

233 A triangular area breaking line

Detailed description

In order to make the objectives, technical solutions, and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be described clearly and completely in conjunction with the accompanying drawings of the embodiments of the present disclosure. In the drawings, the same reference numerals refer to the same components. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by those of ordinary skill in the art without inventive work are within the protection scope of the present disclosure.

Compared with the embodiments shown in the drawings, the feasible embodiments within the scope of protection of the present disclosure may have fewer components, other components not shown in the drawings, different components, differently arranged components or differently connected components, etc. In addition, two or more components in the drawings may be implemented in a single component, or a single component shown in the drawings may be implemented as a plurality of separate components.

Unless otherwise defined, the technical terms or scientific terms used herein should have the ordinary meaning understood by those with ordinary skills in the field to which this disclosure belongs. The words "first", "second" and similar words used in the present disclosure do not indicate any order, quantity, or importance, but are only used to distinguish different components. Similarly, similar words such as "one" or "the" do not necessarily mean quantitative restriction. Words "comprise" or "comprise" and other similar words mean that the elements or objects appearing in front of the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words like "connected" or "coupled" are not limited to physical or mechanical connections, but can comprise electrical connections, whether direct or indirect. The directional terms such as "upper", "lower", "left", "right", "top", "bottom", "clockwise", "counterclockwise" mentioned in the text are only used to describe relative position relationships with respect to the drawings, and when the absolute position of a described object changes, the relative position relationship may also change accordingly. Specifically, the present disclosure relates to an inner support structure for forming a packaging box inner support, a packaging box inner support formed by the inner support structure, a structure comprising the inner support structure and used for forming a packaging box, and a packaging box.

Preferably, the inner support structure, the inner support of the packaging box, the structure for forming the packaging box and the packaging box of the present disclosure are formed of all paper materials, such as cardboard. However, this disclosure does not exclude the use of other materials.

The inner support structure, the inner support of the packaging box, the structure used to form the packaging box and the packaging box disclosed herein are particularly suitable for use as logistics packaging, but the application of the disclosure is not limited thereto.

Firstly, the inner support structure for forming the inner support of the packaging box proposed in this disclosure and the inner support of the packaging box formed by it are introduced. Herein, just for the convenience of distinction, the folded and formed inner support structure of packaging box is called packaging box inner support, while the original unformed inner support structure of packaging box or the inner support structure of packaging box under forming process is called inner support structure, or the inner support structure used to form packaging box inner support. However, this is only for the convenience of distinction. In essence, these terms can refer to the same entity structure.

The inner support structure for forming the packaging box inner support comprises an inner support bottom surface 100. Preferably, the inner support bottom surface 100 is rectangular, but it is not necessary for the inner support bottom surface 100 to be strictly rectangular.

The inner support structure also comprises a first side 170 extending from a first side edge of the inner support bottom surface, and a second side 180 extending from a second side edge of the inner support bottom surface opposite to the first side edge. The inner support structure is provided with a first side first folding line 110, which is located between the first side and the inner support bottom surface, such that the first side can be conveniently folded with respect to the inner support bottom surface along the first side first folding line 110. In addition, the inner support structure also comprises a first side second folding line 120 located in the first side and parallel to the first side first folding line, and a first side third folding line 130 located in the first side and parallel to the first side first folding line and the first side second folding line, which is farther away from the first side first folding line than the first side second folding line.

The inner support structure is also provided with a second side first folding line 140, which is located between the second side and the inner support bottom surface, such that the second side can be conveniently folded relative to the inner support bottom surface along the second side first folding line 140. In addition, the second side second folding line 150 is provided in the second side and parallel to the second side first folding line. The second side third folding line 160 is provided in the second side, parallel to the second side first folding line and the second side second folding line, and further away from the second side first folding line than the second side second folding line. "Folding line" is an indentation structure formed in cardboard or similar sheet material to facilitate folding the cardboard or sheet material therealong.

The dimension of the first sidel70 from the first side first folding line 110 to the first side free edge 171 is smaller than the dimension of the second sidel80 from the second side first folding line 140 to the second side free edge 181.

By configuring the first side and the second side to have different sizes, and by providing the first side first folding line, the first side second folding line, the first side third folding line, the second side first folding line, the second side second folding line, and the second side third folding line, the inner support structure can have different folding schemes, thus forming a packaging box inner support for accommodating products of different sizes, and thus for products of different sizes, it is only required to choose a corresponding scheme.

Referring to Figs. 2A to 4B, different folding schemes, of the inner support structure are described below. Figs. 2A-2B show the steps of folding the inner support structure into a packaging box inner support of a first size, Figs. 3A-3B show the steps of folding the inner support structure into a packaging box inner support of a second size, and Figs. 4A-4B show the steps of folding the inner support structure into a packaging box inner support of a third size . Here, the first size, the second size and the third size can also be called small size, medium size and large size, respectively.

Referring to Figs. 2A-2B, when it is intended to form a packaging box inner support of the first size, the first side 170 is folded into an L-shaped structure only at the first side first folding line 110 and the first side third folding line 130, and is not folded at the first side second folding line 120. The L-shaped structure formed by the first side 170 can well wrap the product matched with the first size. Meanwhile, the second side 180 is folded into a U-shaped structure at the second side first folding line 140, the second side second folding line 150 and the second side third folding line 160. The bottom surface of the U-shaped structure, that is, the portion between the second side second ding line 150 and the second side third folding line 160 abuts against a side wall of the contained product. The U-shaped structure plays a role in keeping, stabilizing and buffering the product.

Referring to Figs. 3A-3B, when it is intended to form a packaging box inner support with the second size larger than the first size, the first side is folded into a U-shaped structure at the first side first folding line 110, the first side second folding line 120 and the first side third folding line 130, and the bottom surface of the U-shaped structure, that is, the portion between the first side second folding line 120 and the first side third folding line 130, abuts against a side wall of the contained product. The U-shaped structure plays a role in keeping, stabilizing and buffering the product. Meanwhile, the second side is folded into an L-shaped structure only at the second side first folding line 140 and the second side second folding line 150, and is not folded at the second side third folding line 160. The L-shaped structure formed by the second side 180 can well wrap the product matched with the second size.

Referring to Figs. 4a-4B, when it is intended to form the inner support of the packaging box with the third size larger than the second size, the first side is folded into an L-shaped structure at the first side first folding line 110 and the first side third folding line 130, and is not folded at the first side second folding line 120. The second side is folded into an L-shaped structure only at the second side first folding line 140 and the second side second folding line 150, and is not folded at the second side third folding line 160. The L-shaped structure formed by the first side and the second side wraps the products with the third size from two sides respectively. It can be seen from the different folding schemes of the inner support structure described with reference to Figs. 2A-4B that the same inner support structure of the present disclosure can conveniently form packaging box inner supports of different sizes by different folding schemes, and the formed packaging box inner supports can well hold products of different sizes and play a role in buffering and protecting them.

The spacing between either two of the first side first folding line, the first side second folding line and the first side third folding line on the first side and the spacing between either two of the second side first folding line, the second side second folding line, and the second side third folding line on the second side can be flexibly designed according to the size of one or more products to be fitted. In the preferred embodiment shown in the drawings, the spacing between the three folding lines on the first side and is not equal to the spacing between the three folding lines on the second side, but this disclosure does not exclude the possibility of other spacing arrangements as long as they are suitable for accommodating products of different sizes.

According to a preferred embodiment, the dimension of the first side 170 from the first side first folding line 110 to the first side third folding line 130 is equal to the dimension of the second side 180 from the second side first folding line 140 to the second side second folding line 150. In this way, when the packaging box inner support with the third size is formed, as shown in Fig. 4A, the height of the L-shaped structure formed by the first side and the second side is the same, so as to better hold a rectangular product. As mentioned above, the inner support bottom surface 100 has a first side edge and a second side edge, and the first side 170 and the second side 180 extend from the first side edge and the second side edge, respectively. In addition, the inner support bottom surface 100 may further comprise a third side edge and a fourth side edge opposite to each other. In a preferred embodiment, the inner support bottom surface 100 is rectangular in shape defined by a first side edge, a second side edge, a third side edge and a fourth side edge.

According to s preferred embodiment, the inner support structure comprises a first buffer side 190 extending from the third side edge of the inner support bottom surface and a second buffer side 191 extending from the fourth side edge of the inner support bottom surface. The first buffer side 190 and the second buffer side 191 are connected with the inner support bottom surface by folding lines. When forming the packaging box inner support, the first buffer side 190 and the second buffer side 191 can be folded relative to the inner support bottom surface along the folding lines to form a buffer portion opposing the side of the packaged product.

According to a preferred embodiment, both the first buffer side 190 and the second buffer side 191 have a double-layer structure. Preferably, the double-layered cushioning structure is configured to be naturally shaped when the first buffer side 190 and the second buffer side 191 are folded. Figs. 2B, 3B and 4B all show the state after the first buffer side 190 and the second buffer side 191 are folded.

According to a preferred embodiment, the distal edge of the first buffer side 190 and the distal edge of the second buffer side 191 are both provided with notches 192. According to a preferred embodiment, the distal edge of the first buffer side 190 and the distal edge of the second buffer side 191 are both provided with two notches 192. The notch is configured to receive an engaging protrusion 226 of an outer box, which will be described later. Fig. 5 shows the state that the engaging protrusion 226 of the outer box is received in the notch 192.

The inner support structure of the packaging box is described in detail above. The present disclosure also provides a packaging box, which comprises the inner support structure and an outer box structure configured to wrap the inner support structure. Herein, just for the convenience of distinguishing, the folded and formed packaging box structure is called the packaging box, while the original unformed packaging box structure or the packaging box structure under forming process is called the structure used to form the packaging box. However, this is only for the convenience of distinction. In essence, these terms can refer to the same entity structure. Similarly, herein, just for the convenience of distinguishing, the folded and formed outer box structure of the packaging box is called the outer box of the packaging box, while the original unformed outer box structure of the packaging box or the outer box structure under forming process is called the outer box structure for forming the outer box of the packaging box, or the outer box structure. However, this is only for the convenience of distinction. In essence, these terms can refer to the same entity structure.

Referring to Fig. 7A, it shows the original state in which the outer box structure is not folded.

The outer box structure comprises a first part 210 and a second part 220, wherein the side edge of the first part is adjacent to the side edge of the second part. The second part 220 comprises a triangular area 230 defined by a triangular area first folding line 231, a triangular area second folding line 232 and a triangular area breaking line 233, wherein the triangular area first folding line 231 and the triangular area second folding line 232 are folding lines for convenience of folding, and the triangular area breaking line 233 has a linear breaking structure.

The contiguous side edges of the first part and the second part of the outer box structure are connected to each other only at the triangle area first folding line 231. That is, the side edge of the first part is contiguous to the side edge of the second part, but instead of being completely connected, the two side edges are only connected to each other by the triangular area first folding line 231. The second part can rotate 90 degrees relative to the first part; during the rotation, the second part is folded at the triangular area first folding line 231 and the triangular area second folding line 232; and after the rotation, the triangular area is sandwiched between the first part and the second part.

Fig. 7B shows the process that the second part rotates relative to the first part, while in Fig. 7C, the second part has rotated 90 degrees relative to the first part.

After the rotation, the first part and the second part form a generally cross-shaped structure. The four sides of the crossshaped structure can be folded upwards, respectively, so as to wrap the inner support structure. Fig. 1 shows that the inner support structure is placed on the rotated outer box structure. Preferably, the bottom surface 100 of the inner support structure can be bonded to the rotated outer box structure with the generally crossshaped structure, so as to facilitate the subsequent folding and forming process. By rotating 90 degrees, the inner support and the outer box are combined into one, which saves more materials in structure and is convenient for material management.

Still referring to Fig. 7C, according to a preferred embodiment, the second part of the outer box structure comprises a second part bottom surface 221, two first folding faces 222 connected to the second part bottom surface 221 by two first folding lines 224 respectively, and two second folding faces 223 connected to the two first folding faces 222 by two second folding lines 225 respectively. The two first folding faces 222 can be folded upward along the two first folding lines 224 and folded inward along the two second folding lines 225 to wrap the inner support structure, such as the inner support structure shown in any one of Figs. 2A to 4B. According to a preferred embodiment, the distal end of each second folding face 223 has an engagement protrusion 226 protruding laterally thereof. Preferably, the engaging protrusion 226 is configured to be engaged in a notch 192 of the distal edge of first buffer side 190 or second buffer side 191 of the inner support structure, as shown in for example Fig. 5. In the case that both the distal edge of the first buffer side 190 and the distal edge of the second buffer side 191 are provided with two notches 192, the engaging protrusions 226 at the distal end of each second folding face 223 are respectively received in one notch.

According to a preferred embodiment, the dimension of the second part bottom surface 221 between the two first folding lines 224 is smaller than the width of the first part 210, as shown in, for example, Fig. 7C. In this way, the formed outer box is at a distance from the inner support of the packaging box in the width direction of the second part, or the inner support of the packaging box is retracted inward from the outer box by a distance, thus ensuring a certain buffer allowance of the packaged products. The folded state can be shown in Fig. 6.

The packaging box structure disclosed by the invention integrates the internal buffer structure with the external box, is able to meet the harsh transportation environment, and environment-friendly and pollution-free, and simple and convenient to assemble and form.

The exemplary implementations of the solutions proposed by the present invention has been described in detail above with reference to the preferred embodiments, but it is understood by those skilled in the art that without departing from the concept of the present invention, various modifications and variations can be made to the above specific implementations, and various technical features and structures proposed by the present invention can be combined in various ways without exceeding the protection scope of the present invention.

Claims

1. An inner support structure for forming an inner support of a packaging box, comprising an inner support bottom surface (100), a first side (170) extending from a first side edge of the inner support bottom surface, and a second side (180) extending from a second side edge of the inner support bottom surface opposite to the first side edge, wherein the inner support structure further comprises: a first side first folding line (110) located between the first side and the inner support bottom surface; a first side second folding line (120) located in the first side and parallel to the first side first folding line; a first side third folding line (130) located in the first side, parallel to the first side first folding line and the first side second folding line, and farther from the first side first folding line than the first side second folding line; a second side first folding line (140) located between the second side and the inner support bottom surface; a second side second folding line (150) located in the second side and parallel to the second side first folding line; a second side third folding line (160) located in the second side, parallel to the second side first folding line and the second side second folding line, and farther from the second side first folding line than the second side second folding line; wherein the dimension of the first side (170) from the first side first folding line (110) to the first side free edge (171) is smaller than that of the second side (180) from the second side first folding line (140) to the second side free edge (181).

2. The inner support structure according to claim 1, wherein when forming an inner support of packaging box of a first size, the first side (170) is folded only at the first side first folding line (110) and the first side third folding line (130) to form an L-shaped structure, and the second side (180) is folded at the second side first folding line (140) and the second side second folding line (150) and the second side third folding line (160) to form an U-shaped structure.

3. The inner support structure according to claim 2, wherein when forming an inner support of packaging box of a second size larger than the first size, the first side (170) is folded at the first side first folding line (110), the first side second folding line (120) and the first side third folding line (130) to form a U-shaped structure, and the second side (180) is only folded at the second side first folding line (140) and the second side second folding line (150) to form an L-shaped structure.

4. The inner support structure according to claim 3, wherein when forming an inner support of packaging box of a third size larger than the second size, the first side (170) is folded only at the first side first folding line (110) and the first side third folding line (130) to form an L-shaped structure, and the second side (180) is only folded at the second side first folding line (140) and the second side second folding line (150) to form an L-shaped structure.

5. The inner support structure according to claim 4, wherein the dimension of the first side from the first side first folding line (110) to the first side third folding line (130) is equal to the dimension of the second side from the second side first folding line (140) to the second side second folding line (150).

6. The inner support structure according to claim 1, wherein the inner support bottom surface further comprises a third side edge and a fourth side edge opposite to each other, and the inner support structure comprises a first buffer side (190) extending from the third side edge of the inner support bottom surface and a second buffer side (191) extending from the fourth side edge of the inner support bottom surface.

7. The inner support structure according to claim 6, wherein the distal edge of the first buffer side (190) and the distal edge of the second buffer side (191) are both provided with notches (192).

8. The inner support structure according to claim 7, wherein the distal edge of the first buffer side (190) and the distal edge of the second buffer side (191) are both provided with two notches (192).

9. The inner support structure according to claim 6, wherein the first buffer side (190) and the second buffer side (191) are both double-layer structures.

10. An inner support of a packaging box, which is formed by the inner support structure according to any one of the claims 1-9.

11. A structure for forming a packaging box, comprising: the inner support structure according to any one of claims 1 to 9; an outer box structure for forming the outer box of the packaging box, wherein the outer box structure is configured to wrap the inner support of the packaging box formed by the inner support structure.

12. The structure for forming a packaging box according to claim 11, wherein the outer box structure comprises a first part (210) and a second part (220), wherein the side edge of the first part is adjacent to the side edge of the second part; wherein the second part (220) comprises a triangular area (230) defined by a triangular area first folding line (231), a triangular area second folding line (232) and a triangular area breaking line (233), wherein the adjacent sides of the first part and the second 22 part are connected with each other only at the triangular area first folding line (231); wherein the second part can rotate 90 degrees relative to the first part; during the rotation, the second part is folded at the triangular area first folding line (231) and the triangular area second folding line (232); and after the rotation, the triangular area is sandwiched between the first part and the second part.

13. The structure for forming a packaging box according to claim 11, the second part comprises a second part bottom surface (221), two first folding faces (222) connected to the second part bottom surface (221) by two first folding lines (224) respectively, and two second folding faces (222) connected to the two first folding faces (222) by two second folding lines (225) respectively.

14. The structure for forming a packaging box according to claim 13, wherein the distal end of each second folding face (223) has an engagement protrusion (226) protruding laterally thereof.

15. The structure for forming a packaging box according to claim 13, wherein the engaging protrusion (226) is configured to be engaged in a notch (192) of the distal edge of first buffer side (190) or second buffer side (191) of the inner support structure.

16. The structure for forming a packaging box according to claim 13, wherein the dimension of the second part bottom surface (221) between the two first folding lines (224) is smaller than the width of the first part (210).

17. A packaging box formed by the structure according to any of the claims 11-16.