Packaging box

Abstract

The utility model provides a packaging box. The packaging box comprises a box body top, box body side parts and a box body bottom, in the first folding state, the box body top, the box body side parts and the box body bottom are matched to define an accommodating cavity in a first form; the first form comprises a main containing cavity and a top expansion cavity located above the main containing cavity, and the main containing cavity is defined by the side portions of the box body and provided with a top opening and a bottom opening; a first top folding sheet and a second top folding sheet at the top of the box body are matched to seal at least part of the top opening, and a first bottom folding sheet and a second bottom folding sheet at the bottom of the box body are matched to seal the bottom opening; the top expansion cavity is at least defined by a first top folding piece and a second top folding piece in a matched mode. In an unfolded state, the first top folding sheet and the first bottom folding sheet are symmetrically arranged relative to the side part of the box body; and the second top folding sheet and the second bottom folding sheet are symmetrically arranged relative to the side part of the box body. The shape difference of the folding pieces at the top and the bottom of the packaging box can be reduced, the process difficulty is reduced, and then the production cost is reduced.

Description

Technical Field

[0001] This application relates to the field of packaging box technology, specifically to a packaging box. Background Technology

[0002] Packaging boxes are widely used for the outer packaging of home appliances, electronic products, furniture, food, and other products. They protect the products, facilitate transportation, and enhance the product's perceived value. Traditional packaging boxes are mostly square in shape and only have a folding form, resulting in limited space and restricting the types of products that can be packaged, thus reducing their utilization value.

[0003] To increase the storage space of packaging boxes, some boxes are equipped with a top expansion cavity; for example, the packaging box (cat) disclosed in patent number CN306801034S has a cavity that can be used as a cat bed; the packaging box disclosed in patent number JP1757811S has a top expansion cavity, forming an overall roof-shaped form. However, the shapes of the top and bottom folding pieces of these packaging boxes differ, resulting in a more complex packaging box structure, increasing the manufacturing difficulty and leading to higher production costs. Utility Model Content

[0004] The purpose of this application is to provide a packaging box to reduce production costs.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] A packaging box includes a top, sides, and a bottom; the packaging box has a folded state and an unfolded state; in the unfolded state, the top, sides, and bottom of the box are laid out on the same plane; wherein...

[0007] The folded state includes at least a first folded state, in which the top, side and bottom of the box body cooperate to form a first-shaped receiving cavity; the first shape includes a main receiving cavity and a top expansion cavity located above the main receiving cavity, the main receiving cavity being formed by the side of the box body and having a top opening and a bottom opening;

[0008] The top of the box includes a first top folding piece and a second top folding piece connected to the top edge of the side of the box; in the first folded state, the first top folding piece and the second top folding piece cooperate to close at least part of the top opening, and the top expansion cavity is formed by the cooperation of the first top folding piece and the second top folding piece.

[0009] The bottom of the box includes a first bottom folding piece and a second bottom folding piece connected to the bottom edge of the side of the box; in the first folded state, the first bottom folding piece and the second bottom folding piece cooperate to close the bottom opening;

[0010] In the unfolded state, the first top folding piece and the first bottom folding piece are symmetrically arranged with respect to the side of the box body; the second top folding piece and the second bottom folding piece are symmetrically arranged with respect to the side of the box body.

[0011] The top edge is the side that forms the top opening when the side of the box is folded; the bottom edge is the side that forms the bottom opening when the side of the box is folded.

[0012] Optionally, in the above-mentioned packaging box, the top of the box body further includes a third top folding piece and a fourth top folding piece, wherein the first top folding piece, the third top folding piece, the second top folding piece, and the fourth top folding piece are sequentially connected to the top edge of the side of the box body; in the first folded state, the third top folding piece and the fourth top folding piece are both supported inside the first top folding piece and the second top folding piece, and the first top folding piece, the third top folding piece, the second top folding piece, and the fourth top folding piece cooperate to close the top opening and form the top expansion cavity;

[0013] The bottom of the box also includes a third bottom folding piece and a fourth bottom folding piece, and the first bottom folding piece, the third bottom folding piece, the second bottom folding piece and the fourth bottom folding piece are sequentially connected to the bottom edge of the side of the box; in the first folded state, the third bottom folding piece and the fourth bottom folding piece are both supported on the inner side of the first bottom folding piece and the second bottom folding piece;

[0014] In the unfolded state, at least a portion of the third top folding piece and the third bottom folding piece are symmetrically arranged relative to the side of the box; and / or, in the unfolded state, at least a portion of the fourth top folding piece and the fourth bottom folding piece are symmetrically arranged relative to the side of the box.

[0015] Optionally, in the above-mentioned packaging box, the folded state includes a second folded state, in which the top, side and bottom of the box body cooperate to form a second-shaped receiving cavity, which is different from the first-shaped cavity.

[0016] Optionally, in the above-mentioned packaging box, both the first top folding piece and the second top folding piece can individually close the top opening;

[0017] And / or, both the first bottom folding piece and the second bottom folding piece can individually close the bottom opening.

[0018] Optionally, in the above-mentioned packaging box, the first top folding piece, the second top folding piece, the first bottom folding piece, the second bottom folding piece, and each side folding piece on the side of the box body are all rectangular;

[0019] And / or, the third top folding piece, the fourth top folding piece, the third bottom folding piece, and the fourth bottom folding piece are all trapezoidal, and the lower base of the trapezoid is connected to the side of the box body.

[0020] Optionally, in the above-mentioned packaging box, each of the top folding pieces on the top of the box body can be folded and unfolded along the top edge, and the first top folding piece and the second top folding piece have the same size perpendicular to the top edge; the third top folding piece and the fourth top folding piece have the same size perpendicular to the top edge;

[0021] And / or, each bottom folding piece at the bottom of the box can be folded and unfolded along the bottom edge, the first bottom folding piece and the second bottom folding piece having the same dimension perpendicular to the bottom edge; the third bottom folding piece and the fourth bottom folding piece having the same dimension perpendicular to the bottom edge.

[0022] Optionally, in the above-mentioned packaging box, the third top folding piece is provided with a first folding line and a second folding line. The first folding line and the second folding line extend from two right-angle vertices of the third top folding piece near the side of the box body to the third top folding edge of the third top folding piece away from the side of the box body, respectively. The third top folding piece includes a first lug provided on the first folding line and a second lug provided on the second folding line.

[0023] The fourth top folding piece is provided with a third folding line and a fourth folding line. The third folding line and the fourth folding line extend from two right-angle vertices of the fourth top folding piece near the side of the box body to the fourth top folding edge of the fourth top folding piece away from the side of the box body. The fourth top folding piece includes a third lug provided on the third folding line and a fourth lug provided on the fourth folding line.

[0024] The first top folding piece is provided with a first snap-fit ​​hole and a fourth snap-fit ​​hole; the second top folding piece is provided with a second snap-fit ​​hole and a third snap-fit ​​hole.

[0025] In the first folded state, the third top folding piece is folded along the top edge and along the first folding line and the second folding line; the fourth top folding piece is folded along the top edge and along the third folding line and the fourth folding line; the first top folding piece is folded along the top edge and abuts against the first folding line and the fourth folding line, and the first lug is inserted into the first snap-fit ​​hole, and the fourth lug is inserted into the fourth snap-fit ​​hole; the second top folding piece is folded along the top edge and abuts against the second folding line and the third folding line, and the second lug is inserted into the second snap-fit ​​hole, and the third lug is inserted into the third snap-fit ​​hole.

[0026] Optionally, in the above-mentioned packaging box, the first fold line and the second fold line intersect at the third top fold edge, and the first fold line, the second fold line and the top edge cooperate to form a triangle;

[0027] The third fold line and the fourth fold line intersect at the fourth top fold edge, and the third fold line, the fourth fold line and the top edge together form a triangle.

[0028] Optionally, in the above-mentioned packaging box, in the first folded state, the first top folding edge of the first top folding piece away from the side of the box body abuts against the second top folding edge of the second top folding piece away from the side of the box body, and the included angle formed by the first top folding piece and the second top folding piece toward the side of the top expansion cavity is 45° to 90°.

[0029] Optionally, in the above-mentioned packaging box, the side of the box body includes a first side folding piece, a third side folding piece, a second side folding piece, and a fourth side folding piece connected in sequence. One of the first side folding piece away from the first outer side of the third side folding piece and the fourth side folding piece away from the second side folding piece is provided with a side overlapping tongue; in the folded state, the side overlapping tongue is fixedly connected to the other side.

[0030] And / or, one of the first top folding piece and the second top folding piece is provided with a top insertion interface at the position where it connects to the side of the box body, and the other is provided with a top insertion tongue on the outer folding edge away from the side of the box body. When the first top folding piece and the second top folding piece are folded, the top insertion tongue can be inserted into the top insertion interface.

[0031] And / or, one of the first bottom folding piece and the second bottom folding piece is provided with a bottom insertion interface at the position where it connects to the side of the box body, and the other is provided with a bottom insertion tongue on the bottom folding edge away from the side of the box body. When the first bottom folding piece and the second bottom folding piece are folded, the bottom insertion tongue can be inserted into the bottom insertion interface.

[0032] And / or, at least one of the first top folding piece, the second top folding piece, the first bottom folding piece, and the second bottom folding piece is provided with a gripping structure on the folding edge away from the side of the box body;

[0033] And / or, a handle hole is provided on the side of the box.

[0034] The packaging box provided in this application includes a folded state and an unfolded state. The folded state includes at least a first folded state, in which the top, sides, and bottom of the box cooperate to form a first-shaped receiving cavity; the first shape includes a main receiving cavity and a top expansion cavity located above the main receiving cavity; the main receiving cavity is enclosed by the sides of the box and has a top opening and a bottom opening; a first and a second top folding piece at the top of the box cooperate to close at least part of the top opening, and a first and a second bottom folding piece at the bottom of the box cooperate to close the bottom opening; the top expansion cavity is formed at least by the cooperation of the first and second top folding pieces; the top expansion cavity expands the receiving space, increasing the variety of products that can be packaged, and can also be used as a pet bed, such as a cat bed, increasing its utilization value. In the unfolded state, the top, sides, and bottom of the box unfold onto the same plane, occupying less space and facilitating the storage of the packaging box.

[0035] The packaging box provided in this application can be reused. When not in use, the packaging box can be transformed into an unfolded state. When in use, the packaging box can be transformed into a first folded state, utilizing the first-form receiving cavity to hold products or be used as a pet bed. When transforming the packaging box from the unfolded state to the first folded state, the sides of the box are first folded to form the main receiving cavity; then, the first and second bottom folding pieces are folded to close the bottom opening, and the first and second top folding pieces are folded to close at least part of the top opening and to form a top expansion cavity; thus, the packaging box forms the first-form receiving cavity. The steps for transforming the packaging box from the first folded state to the unfolded state are reversed and will not be described in detail here.

[0036] Because the first top folding piece and the first bottom folding piece are symmetrically arranged with respect to the sides of the box when unfolded, and the second top folding piece and the second bottom folding piece are also symmetrically arranged with respect to the sides of the box, the shape difference between the top and bottom folding pieces of the packaging box can be reduced, thus simplifying the structure of the packaging box, reducing the difficulty of the process, and thereby reducing production costs.

[0037] In addition, the packaging box in its first folded state has a unique shape, beautiful appearance, and greater visual appeal, thus enhancing its market competitiveness.

[0038] Furthermore, in the unfolded state, some or all areas of the third top folding piece and the third bottom folding piece can be symmetrically arranged relative to the sides of the box; and / or, some or all areas of the fourth top folding piece and the fourth bottom folding piece can be symmetrically arranged relative to the sides of the box. This arrangement, where the third top folding piece and the third bottom folding piece are identical or only slightly different, and the fourth top folding piece and the fourth bottom folding piece are identical or only slightly different, further reduces the shape difference between the top and bottom folding pieces of the packaging box, simplifies the packaging box structure, and reduces production costs.

[0039] Furthermore, the packaging box can also include two folding states, which can be folded into the first folding state or the second folding state according to different uses, realizing more uses and increasing utilization value. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be introduced below. The accompanying drawings described below are merely embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0041] Figure 1 A schematic diagram of an exemplary packaging box in its unfolded state, consistent with some embodiments of this application, is shown.

[0042] Figure 2 A schematic diagram of an exemplary packaging box in an intermediate state between an unfolded state and a folded state, consistent with some embodiments of this application, is shown.

[0043] Figure 3 A schematic diagram of the structure of an exemplary packaging box in one direction in a first folded state is shown, consistent with some embodiments of this application;

[0044] Figure 4 A schematic diagram of an exemplary packaging box in another direction, consistent with some embodiments of this application, is shown;

[0045] Figure 5 A perspective structural schematic diagram of an exemplary packaging box in a first folded state is shown, consistent with some embodiments of this application;

[0046] Figure 6A schematic diagram of an exemplary packaging box in a second folded state is shown, consistent with some embodiments of this application.

[0047] in, Figures 1-6 middle:

[0048] 1-First top folding piece; 1a-Top insertion interface; 1b-Fourth snap-fit ​​hole; 1c-Grip structure; 1d-First snap-fit ​​hole;

[0049] 2-Third top fold; 2a-First fold line; 2b-First lug; 2c-Second lug; 2d-Second fold line;

[0050] 3-Second top folding tab; 3a-Second snap-fit ​​hole; 3b-Top insert; 3c-Third snap-fit ​​hole;

[0051] 4-Fourth top fold; 4a-Third fold line; 4b-Third lug; 4c-Fourth lug; 4d-Fourth fold line;

[0052] 5-First side folding piece; 5a-Side overlapping tongue; 5b-Handle hole; 6-First bottom folding piece; 6a-Bottom insertion interface; 7-Third bottom folding piece; 8-Third side folding piece; 9-Second bottom folding piece; 9a-Bottom insertion tongue; 10-Second side folding piece; 11-Fourth bottom folding piece; 12-Fourth side folding piece. Detailed Implementation

[0053] The embodiments of this application will be described below. It should be noted that, in order to provide a concise description of these embodiments, this specification cannot provide a detailed description of all features of the actual embodiments. It should be understood that, in the actual implementation of any embodiment, changes may occur from one embodiment to another to achieve specific objectives. Furthermore, it is also understood that, although the efforts made in this development process may be complex and lengthy, for those skilled in the art related to the content of this application, some design, manufacturing, or production modifications based on the technical content disclosed in this application are merely conventional technical means and should not be construed as insufficient content of this application.

[0054] The packaging box provided in this application embodiment includes a top, sides, and bottom of the box; the packaging box has a folded state and an unfolded state; as... Figure 1 As shown, in the unfolded state, the top, sides, and bottom of the box are unfolded onto the same plane; wherein, the folded state includes at least a first folded state, wherein, as... Figure 3 The diagram shown is a structural schematic of the packaging box in one direction when it is in its first folded state; as shown... Figure 4The diagram shown is a structural schematic of the packaging box in its first folded state from another direction; as shown... Figure 5 The diagram shows a perspective view of the packaging box in its first folded state. In this state, the top, sides, and bottom of the box form a first-shaped receiving cavity. This first shape includes a main receiving cavity and a top expansion cavity located above it. The main receiving cavity is formed by the sides of the box and has a top opening and a bottom opening. The top of the box includes a first top folding piece 1 and a second top folding piece 3 connected to the top edge of the sides. In the first folded state, the first top folding piece 1 and the second top folding piece 3 cooperate to close at least part of the top opening, and the top expansion cavity is formed by at least the first top folding piece... The stacked piece 1 and the second top folding piece 3 cooperate to form a box; the bottom of the box includes a first bottom folding piece 6 and a second bottom folding piece 9 connected to the bottom edge of the side of the box; in the first folded state, the first bottom folding piece 6 and the second bottom folding piece 9 cooperate to close the bottom opening; wherein, in the unfolded state, the first top folding piece 1 and the first bottom folding piece 6 are symmetrically arranged with respect to the side of the box; the second top folding piece 3 and the second bottom folding piece 9 are symmetrically arranged with respect to the side of the box; the top edge is a side that forms the top opening when the side of the box is folded; the bottom edge is a side that forms the bottom opening when the side of the box is folded.

[0055] The packaging box provided in this application embodiment includes a folded state and an unfolded state. The folded state includes at least a first folded state, in which the top, sides, and bottom of the box cooperate to form a first-shaped receiving cavity; the first shape includes a main receiving cavity and a top expansion cavity located above the main receiving cavity; the main receiving cavity is surrounded by the sides of the box and has a top opening and a bottom opening; a first top folding piece 1 and a second top folding piece 3 on the top of the box cooperate to close at least part of the top opening, and a first bottom folding piece 6 and a second bottom folding piece 9 on the bottom of the box cooperate to close the bottom opening; the top expansion cavity is at least surrounded by the first top folding piece 1 and the second top folding piece 3; the top expansion cavity expands the receiving space, which can increase the variety of products that can be packaged, and can also be used as a pet bed, such as a cat bed, thus increasing its utilization value. In the unfolded state, the top, sides, and bottom of the box unfold onto the same plane, occupying less space and facilitating the storage of the packaging box.

[0056] The packaging box provided in this application embodiment can be reused. When not in use, the packaging box can be deformed into an unfolded state. When in use, the packaging box can be deformed into a first folded state, utilizing the first-form receiving cavity to hold products or be used as a pet bed. When the packaging box is deformed from the unfolded state to the first folded state, the sides of the box are first folded to form the main receiving cavity; then the first bottom folding piece 6 and the second bottom folding piece 9 are folded to close the bottom opening, and the first top folding piece 1 and the second top folding piece 3 are folded to close at least part of the top opening and to form a top expansion cavity; thus, the packaging box forms the first-form receiving cavity. The operation steps for deforming the packaging box from the first folded state to the unfolded state are reversed and will not be described in detail here.

[0057] Since the first top folding piece 1 and the first bottom folding piece 6 are symmetrically arranged with respect to the side of the box when unfolded, and the second top folding piece 3 and the second bottom folding piece 9 are symmetrically arranged with respect to the side of the box, the shape difference between the top and bottom folding pieces of the packaging box can be reduced, thus simplifying the structure of the packaging box, reducing the difficulty of the process, and thereby reducing the production cost.

[0058] In addition, the packaging box in its first folded state has a unique shape, beautiful appearance, and greater visual appeal, thus enhancing its market competitiveness.

[0059] In some embodiments, such as Figure 1 As shown, the top of the box also includes a third top folding piece 2 and a fourth top folding piece 4. The first top folding piece 1, the third top folding piece 2, the second top folding piece 3, and the fourth top folding piece 4 are sequentially connected to the top edge of the side of the box. In the first folded state, the third top folding piece 2 and the fourth top folding piece 4 are both supported inside the first top folding piece 1 and the second top folding piece 3, and the first top folding piece 1, the third top folding piece 2, the second top folding piece 3, and the fourth top folding piece 4 cooperate to close the top opening and form a top expansion cavity. The bottom of the box also includes a third bottom folding piece 7 and a fourth bottom folding piece 11. The first bottom folding piece 6, the third bottom folding piece 7, the second bottom folding piece 9, and the fourth bottom folding piece 11 are sequentially connected to the bottom edge of the side of the box. In the first folded state, the third bottom folding piece 7 and the fourth bottom folding piece 11 are both supported inside the first bottom folding piece 6 and the second bottom folding piece 9.

[0060] Packaging box is made of Figure 1 The unfolded state shown is transformed as follows: Figure 5In the first folded state shown; for the top of the box, first fold the third top folding piece 2 and the fourth top folding piece 4, then fold the first top folding piece 1 and the second top folding piece 3, so that the first top folding piece 1 and the second top folding piece 3 are located outside the third top folding piece 2 and the fourth top folding piece 4, so that the third top folding piece 2 and the fourth top folding piece 4 are both supported inside the first top folding piece 1 and the second top folding piece 3, which can improve the load-bearing capacity and stability of the top of the box; moreover, the four top folding pieces cooperate to close the top opening, optimizing the sealing and aesthetics of the top of the packaging box.

[0061] For the bottom of the box, first fold the third bottom folding piece 7 and the fourth bottom folding piece 11, then fold the first bottom folding piece 6 and the second bottom folding piece 9, so that the first bottom folding piece 6 and the second bottom folding piece 9 are located outside the third bottom folding piece 7 and the fourth bottom folding piece 11. This ensures that the third bottom folding piece 7 and the fourth bottom folding piece 11 are both supported inside the first bottom folding piece 6 and the second bottom folding piece 9, which can improve the load-bearing capacity and stability of the bottom of the box. Moreover, the four bottom folding pieces work together to close the bottom opening, optimizing the sealing and aesthetics of the bottom of the packaging box.

[0062] Optionally, the top of the box may consist only of a first top folding piece 1 and a second top folding piece 3, which provide top support for the box. The bottom of the box may consist only of a first bottom folding piece 6 and a second bottom folding piece 9, which provide bottom support for the box; this results in a simpler structure.

[0063] In some embodiments, in the unfolded state, a portion or all of the third top folding piece 2 and the third bottom folding piece 7 are symmetrically arranged with respect to the sides of the box; and / or, a portion or all of the fourth top folding piece 4 and the fourth bottom folding piece 11 are symmetrically arranged with respect to the sides of the box. This arrangement, where the third top folding piece 2 and the third bottom folding piece 7 are identical or only slightly different, and the fourth top folding piece 4 and the fourth bottom folding piece 11 are identical or only slightly different, can further reduce the shape differences between the top and bottom folding pieces of the packaging box, simplify the packaging box structure, and reduce production costs.

[0064] In addition, when unfolded, the first top folding piece 1, the third top folding piece 2, the second top folding piece 3, the fourth top folding piece 4, the first bottom folding piece 6, the third bottom folding piece 7, the second bottom folding piece 9, and the fourth bottom folding piece 11, as well as the side of the box, are all unfolded on the same plane, occupying less space and making them easy to store.

[0065] In some embodiments, the folded state includes a second folded state, in which the top, sides, and bottom of the box cooperate to form a second-shaped receiving cavity, which differs from the first state. In this way, the packaging box includes two folded states, broadening its applicability. It can be folded into the first folded state to form the first-shaped receiving cavity, or folded into the second folded state to form the second-shaped receiving cavity, depending on different uses, achieving more applications and increasing its utilization value. For example, the second shape is rectangular or cubic, with a relatively regular shape. The packaging box can be folded to form the second-shaped receiving cavity to hold products such as vacuum cleaners, etc. Figure 6 As shown; moreover, the top and bottom of the box can be folded and unfolded in the same way, making the operation simpler. The packaging box can also be folded to form a receiving cavity in the first form to hold products with protruding tops, such as piggy banks, or it can be used as a pet bed, such as... Figure 3 As shown; its applications are wider, further enhancing its value.

[0066] In some embodiments, both the first top folding piece 1 and the second top folding piece 3 can individually close the top opening. For example... Figure 1 As shown, the first top folding piece 1, the second top folding piece 3, and the top opening have the same or substantially the same shape, which simplifies the structure and facilitates processing. Optionally, in the second folded state, the top opening formed by the side of the box is closed by sequentially stacking the first top folding piece 1 and the second top folding piece 3 at the top opening, achieving a double seal on the top of the packaging box, resulting in a better sealing effect on the receiving cavity and thus optimizing the protection of the products inside the packaging box.

[0067] In some embodiments, both the first bottom folding piece 6 and the second bottom folding piece 9 can individually close the bottom opening. For example... Figure 1 As shown, the first bottom folding piece 6, the second bottom folding piece 9, and the bottom opening have the same or substantially the same shape, which simplifies the structure and facilitates processing. Optionally, in the second folded state, the bottom opening formed by the side of the box is closed by sequentially stacking the first bottom folding piece 6 and the second bottom folding piece 9 at the bottom opening, achieving a double seal at the bottom of the packaging box, resulting in a better sealing effect on the receiving cavity and thus optimizing the protection of the products inside the packaging box.

[0068] In addition, the top and bottom of the box can be folded into a second fold using the same steps, which improves the convenience of folding.

[0069] Optionally, the first top folding piece 1 and the second top folding piece 3 can be fitted together to close the top opening, for example, by mating or plugging. The first bottom folding piece 6 and the second bottom folding piece 9 can be fitted together to close the bottom opening, for example, by mating or plugging.

[0070] In some embodiments, the first top folding piece 1, the second top folding piece 3, the first bottom folding piece 6, the second bottom folding piece 9, and each side folding piece on the side of the housing are rectangular. For example... Figure 1 As shown, the first top folding piece 1, the second top folding piece 3, the first bottom folding piece 6, and the second bottom folding piece 9 are the main folding pieces used to close the top and bottom openings formed by the sides of the box, as well as the side folding pieces of the box. They are all rectangular or square, with regular shapes, which are convenient for processing.

[0071] In some embodiments, the third top folding piece 2, the fourth top folding piece 4, the third bottom folding piece 7, and the fourth bottom folding piece 11 are all trapezoidal, and the lower base of the trapezoid is connected to the side of the housing. For example... Figure 1 As shown, the third top folding piece 2, the fourth top folding piece 4, the third bottom folding piece 7, and the fourth bottom folding piece 11 serve as auxiliary folding pieces that provide additional support to the top and bottom of the packaging box. They are all trapezoidal, with their width gradually decreasing from the end closest to the side of the box to the end furthest from the side. This design ensures the bottom of the auxiliary folding pieces guarantees the airtightness of the packaging box's cavity, while other parts avoid the sides of the box, creating a gap between the auxiliary folding pieces and the top opening in the folded state. This prevents the auxiliary folding pieces from getting stuck, thus facilitating folding and unfolding. Optionally, the third top folding piece 2, the fourth top folding piece 4, the third bottom folding piece 7, and the fourth bottom folding piece 11 can also be rectangular or other irregular shapes.

[0072] In some embodiments, each top folding panel on the top of the housing can be along the top edge (e.g., Figure 1 (As shown by the dotted line on the upper side of the middle box) Folding and unfolding. The top edge of the side of the box serves as the folding line for each top folding piece on the top of the box, and each top folding piece is folded into a folded state by folding along the top edge.

[0073] The first top fold piece 1 and the second top fold piece 3 have the same dimension perpendicular to the top edge; the third top fold piece 2 and the fourth top fold piece 4 have the same dimension perpendicular to the top edge. For example... Figure 1As shown, this arrangement ensures that, in the unfolded state, the edges of the first and second top folding pieces 1 and 3 are aligned with the edges of the third and fourth top folding pieces 4, simplifying the structure and facilitating cutting and forming. Optionally, all top folding pieces on the top of the box can have the same dimension perpendicular to the top edge, further simplifying manufacturing. The dimensions of the first and second top folding pieces 1 and 3 perpendicular to the top edge can be larger than those of the third and fourth top folding pieces 2 and 4, reducing their size and thus weight. Alternatively, the dimensions of the first and second top folding pieces 1 and 3 perpendicular to the top edge can be smaller than those of the third and fourth top folding pieces 2 and 4, improving their support effect.

[0074] In some embodiments, each bottom folding piece at the bottom of the housing can be along the bottom edge (e.g., Figure 1 (As shown by the dotted line on the lower side of the middle box) Folding and unfolding. The bottom edge of the side of the box serves as the folding line for each bottom folding piece of the box bottom. Each bottom folding piece is folded into a folded state by folding along the bottom edge.

[0075] The first bottom fold piece 6 and the second bottom fold piece 9 have the same dimension perpendicular to the bottom edge; the third bottom fold piece 7 and the fourth bottom fold piece 11 have the same dimension perpendicular to the bottom edge. For example... Figure 1 As shown, this arrangement ensures that, in the unfolded state, the edges of the first bottom folding piece 6 and the second bottom folding piece 9 are aligned with the edges away from the bottom edge; it also aligns the edges of the third bottom folding piece 7 and the fourth bottom folding piece 11 with the edges away from the bottom edge. This simplifies the structure and facilitates cutting and shaping. Optionally, all bottom folding pieces at the bottom of the box can have the same dimension perpendicular to the bottom edge, further simplifying manufacturing. The dimensions of the first bottom folding piece 6 and the second bottom folding piece 9 perpendicular to the bottom edge can be larger than those of the third bottom folding piece 7 and the fourth bottom folding piece 11, reducing their dimensions and thus reducing weight. Alternatively, the dimensions of the first bottom folding piece 6 and the second bottom folding piece 9 perpendicular to the bottom edge can be smaller than those of the third bottom folding piece 7 and the fourth bottom folding piece 11, providing better support for the third bottom folding piece 7 and the fourth bottom folding piece 11.

[0076] In some embodiments, the third top folding piece 2 is provided with a first folding line 2a and a second folding line 2d, the first folding line 2a and the second folding line 2d extending from two right-angled vertices near the side of the box body to the third top folding edge away from the side of the box body; the third top folding piece 2 includes a first lug 2b provided on the first folding line 2a and a second lug 2c provided on the second folding line 2d; the fourth top folding piece 4 is provided with a third folding line 4a and a fourth folding line 4d, the third folding line 4a and the fourth folding line 4d extending from two right-angled vertices near the side of the box body to the fourth top folding edge away from the side of the box body; the fourth top folding piece 4 includes a third lug 4b provided on the third folding line 4a and a fourth lug 4c provided on the fourth folding line 4d;

[0077] The first top folding piece 1 is provided with a first snap-fit ​​hole 1d and a fourth snap-fit ​​hole 1b; the second top folding piece 3 is provided with a second snap-fit ​​hole 3a and a third snap-fit ​​hole 3c.

[0078] In the first folded state, the third top folding piece 2 is folded along the top edge and along the first folding line 2a and the second folding line 2d; the fourth top folding piece 4 is folded along the top edge and along the third folding line 4a and the fourth folding line 4d; the first top folding piece 1 is folded along the top edge and abuts against the first folding line 2a and the fourth folding line 4d, and the first lug 2b is inserted into the first snap-fit ​​hole 1d, and the fourth lug 4c is inserted into the fourth snap-fit ​​hole 1b; the second top folding piece 3 is folded along the top edge and abuts against the second folding line 2d and the third folding line 4a, and the second lug 2c is inserted into the second snap-fit ​​hole 3a, and the third lug 4b is inserted into the third snap-fit ​​hole 3c.

[0079] Packaging box is made of Figure 1 The unfolded state shown is transformed as follows: Figure 5 In the first folded state shown, for the top of the box, firstly, the third top folding piece 2 is folded along the top edge and along the first folding line 2a and the second folding line 2d, and the fourth top folding piece 4 is folded along the top edge and along the third folding line 4a and the fourth folding line 4d; then, the first top folding piece 1 is folded along the top edge to abut against the first folding line 2a and the fourth folding line 4d, and the second top folding piece 3 is folded along the top edge to abut against the second folding line 2d and the third folding line 4a; and the folding positions of the third top folding piece 2 and the fourth top folding piece 4 relative to the top edge are adjusted so that the position of the first lug 2b is aligned with the first snap-fit ​​hole 1d and inserted into the first snap-fit ​​hole 1d, the position of the fourth lug 4c is aligned with the fourth snap-fit ​​hole 1b and inserted into the fourth snap-fit ​​hole 1b, the position of the second lug 2c is aligned with the second snap-fit ​​hole 3a and inserted into the second snap-fit ​​hole 3a, and the position of the third lug 4b is aligned with the third snap-fit ​​hole 3c and inserted into the third snap-fit ​​hole 3c.

[0080] This design, through the engagement of the four lugs with the snap-fit ​​holes and the positioning of the four fold lines, enhances the connection strength of the first top folding piece 1, the third top folding piece 2, the second top folding piece 3, and the fourth top folding piece 4, resulting in better stability of the enclosed top expansion cavity. Furthermore, the first folded state can be achieved simply by folding and snapping, improving operational convenience and facilitating easy assembly and disassembly for reuse. Optionally, the first top folding piece 1, the third top folding piece 2, the second top folding piece 3, and the fourth top folding piece 4 can also be inserted or glued together to achieve the same effect of forming a top expansion cavity.

[0081] In some embodiments, the first fold line 2a and the second fold line 2d intersect at the third top fold edge, and the first fold line 2a, the second fold line 2d, and the top edge together form a triangle; the third fold line 4a and the fourth fold line 4d intersect at the fourth top fold edge, and the third fold line 4a, the fourth fold line 4d, and the top edge together form a triangle, such as... Figure 1 As shown. In this way, in the first folded state, the first top folding piece 1 and the second top folding piece 3 can all overlap on the folding lines of the third top folding piece 2 and the fourth top folding piece 4, forming a triangular support structure with better stability; at the same time, the four top folding pieces on the top of the box are connected in a sealed manner, ensuring the airtightness of the top expansion cavity.

[0082] Optionally, the triangles formed by the first fold line 2a, the second fold line 2d, and the top edge, as well as the triangles formed by the third fold line 4a, the fourth fold line 4d, and the top edge, are all equilateral triangles. When the packaging box transforms from the unfolded state to the first folded state, the first top fold piece 1 is folded 30° along its top edge towards the top opening, and the second top fold piece 3 is folded 30° along its top edge towards the top opening, thus aligning with the first fold line 2a and the second fold line 2d of the third top fold piece 2, and the third fold line 4a and the fourth fold line 4d of the fourth top fold piece 4. This angle facilitates processing, and the resulting top expansion cavity has the optimal length-to-width ratio, maximizing the accommodating space. The aforementioned triangles can also be other shapes, such as isosceles triangles with apex angles of 45°, 50°, 70°, 80°, or 90°.

[0083] In some embodiments, in the first folded state, the first top folding edge of the first top folding piece 1 away from the side of the housing abuts against the second top folding edge of the second top folding piece 3 away from the side of the housing, and the included angle formed by the first top folding piece 1 and the second top folding piece 3 toward the side of the top expansion cavity is 45° to 90°. Figure 4As shown, in the first folded state, the first top folding piece 1 and the second top folding piece 3 abut against each other and form a triangular support structure with the top edge of the side of the box, resulting in better stability. Furthermore, the first top folding piece 1 and the second top folding piece 3 work together to form a triangular top expansion cavity, which, together with the main receiving cavity formed by the side of the box, creates a roof-shaped receiving cavity, making it more aesthetically pleasing. Additionally, the sides of the first top folding piece 1 and the second top folding piece 3, perpendicular to the top edge of the side of the box, work together with the side of the box to form openings at both ends of the top expansion cavity. When used as a pet bed, this facilitates pet entry and exit, improving practicality.

[0084] Optionally, the included angle formed by the first top folding piece 1 and the second top folding piece 3 facing the top expansion cavity can be 45°, 50°, 60°, 70°, 80°, or 90°, etc. In the first folded state, the first top folding piece 1 and the second top folding piece 3 can also be inserted or overlapped.

[0085] In some embodiments, the side of the housing includes a first side folding piece 5, a third side folding piece 8, a second side folding piece 10, and a fourth side folding piece 12 connected in sequence. One of the first outer side edge of the first side folding piece 5 away from the third side folding piece 8 and the second outer side edge of the fourth side folding piece 12 away from the second side folding piece 10 is provided with a side overlapping tongue 5a; in the folded state, the side overlapping tongue 5a is fixedly connected to the other outer side. In such a case... Figure 5 The first folded state shown and as Figure 6 In the second folded state shown, the four side folding pieces on the side of the box are folded in sequence, so that the first outer side of the first side folding piece 5 away from the third side folding piece 8 and the second outer side of the fourth side folding piece 12 away from the second side folding piece 10 are joined together, and the first outer side and the second outer side are connected together by the side overlapping tongue 5a, thereby forming a main receiving cavity with a top opening and a bottom opening.

[0086] The side overlapping tongue 5a can be located inside or outside the main receiving cavity, and can be bonded or snapped onto the side folding piece. The side overlapping tongue 5a facilitates the connection between the first side folding piece 5 and the fourth side folding piece 12, ensuring the connection area and improving the connection strength.

[0087] In some embodiments, such as Figure 1 As shown, one of the first top folding piece 1 and the second top folding piece 3 has a top insertion interface 1a at the position where it connects to the side of the box, and the other has a top tongue 3b on its outer folding edge away from the side of the box. When the first top folding piece 1 and the second top folding piece 3 are folded, the top tongue 3b can be inserted into the top insertion interface 1a. Figure 6As shown, in the second folded state, after the first top folding piece 1 and the second top folding piece 3 are stacked at the top opening, they are fixed to the top of the box by inserting the top tongue 3b into the top insertion interface 1a, facilitating assembly and disassembly while ensuring good connection strength. Alternatively, the top folding pieces can also be fixed by adhesive or other methods. Figure 3 As shown, in the first folded state, after the first top folding piece 1 and the second top folding piece 3 abut against each other at the top opening, the top tongue 3b overlaps the outside of the top folding piece on the opposite side. Furthermore, it can be fixed by adhesive or sticker to ensure the stability of the first top folding piece 1 and the second top folding piece 3 in the folded position.

[0088] In some embodiments, such as Figure 1 As shown, one of the first bottom folding piece 6 and the second bottom folding piece 9 has a bottom insertion interface 6a at the position where it connects to the side of the box, and the other has a bottom tongue 9a on the bottom folding edge away from the side of the box. When the first bottom folding piece 6 and the second bottom folding piece 9 are folded, the bottom tongue 9a can be inserted into the bottom insertion interface 6a. Figure 3 The first folded state shown and as Figure 6 In the second folded state shown, after the first bottom folding piece 6 and the second bottom folding piece 9 are stacked with the bottom opening, the bottom folding pieces at the bottom of the box are fixed by inserting the bottom tongue 9a into the bottom insertion interface 6a, which facilitates disassembly and assembly and ensures good connection strength. Alternatively, the bottom folding pieces can also be fixed by adhesive or other methods.

[0089] In some embodiments, at least one of the first top folding piece 1, the second top folding piece 3, the first bottom folding piece 6, and the second bottom folding piece 9 has a gripping structure 1c on its folding edge away from the side of the box. The gripping structure 1c can be provided on one, two, three, or four of the first top folding piece 1, the second top folding piece 3, the first bottom folding piece 6, and the second bottom folding piece 9, facilitating the unfolding and folding operation of the packaging box. For example, the first top folding piece 1 is provided with a gripping structure 1c, such as a semi-circular groove; the second top folding piece 3 is provided with a top tongue 3b; and so on. Figure 1 As shown, the semi-circular groove and the top tongue 3b are grasped by fingers, which facilitates the taking and placing of the folding piece and makes it easy to fold and unfold the top folding piece.

[0090] In some embodiments, a handle hole 5b is provided on the side of the box to facilitate the lifting of the packaging box. For example, a handle hole 5b is provided on the first side folding piece 5 to facilitate the loading and unloading of the packaging box in the folded state. Figure 6 As shown.

[0091] In some embodiments, from left to right, the first top folding piece 1 and the first bottom folding piece 6 are respectively connected to the upper and lower sides of the first side folding piece 5; the third top folding piece 2 and the third bottom folding piece 7 are respectively connected to the upper and lower sides of the third side folding piece 8; the second top folding piece 3 and the second bottom folding piece 9 are respectively connected to the upper and lower sides of the second side folding piece 10; and the fourth top folding piece 4 and the fourth bottom folding piece 11 are respectively connected to the upper and lower sides of the fourth side folding piece 12, as shown below. Figure 1 As shown.

[0092] In general, the packaging box is made of, for example Figure 1 The unfolded state shown is folded as Figure 5 The specific operations for the first folded state shown are as follows:

[0093] S1. First, fold the first side folding piece 5, the third side folding piece 8, the second side folding piece 10, the fourth side folding piece 12, and the side overlapping tongue 5a on the first side folding piece 5, and then glue the side overlapping tongue 5a and the fourth side folding piece 12 together to form a shape as shown. Figure 2 The intermediate state shown;

[0094] S2. Next, fold the third bottom folding piece 7 and the fourth bottom folding piece 11 at the bottom of the box inward by 90°, then fold the first bottom folding piece 6 and the second bottom folding piece 9 inward by 90°, then fold the bottom tongue 9a on the second bottom folding piece 9 inward by 90° and insert it into the bottom insertion interface 6a of the first bottom folding piece 6, thereby forming a closed bottom of the box.

[0095] S3. Then, first fold the third top folding piece 2 of the box body inward along the top edge and inward along the first folding line 2a and the second folding line 2d. Then fold the fourth top folding piece 4 inward along the top edge and inward along the third folding line 4a and the fourth folding line 4d. Then fold the first top folding piece 1 inward 30° along the top edge to abut against the first folding line 2a and the fourth folding line 4d. Then fold the second top folding piece 3 inward 30° along the top edge to abut against the second folding line 2d and the third folding line 4a. The position is adjusted; and the folding positions of the third top folding piece 2 and the fourth top folding piece 4 relative to the top edge are adjusted so that the first lug 2b is inserted into the first latching hole 1d, the fourth lug 4c is inserted into the fourth latching hole 1b, the second lug 2c is inserted into the second latching hole 3a, and the third lug 4b is inserted into the third latching hole 3c; finally, the top tongue 3b is folded 60° and overlapped on the outside of the first top folding piece 1, thereby folding to form a first shape, such as a house-shaped (also called a roof-shaped) packaging box, as shown. Figure 4 As shown.

[0096] In general, the packaging box is made of, for example Figure 1 The unfolded state shown is folded as Figure 6The specific operation of the second folded state shown is different from the specific operation of folding into the first folded state, except for the folding method of the top of the box.

[0097] When folding to the second folded state is required, first fold the third top folding piece 2 and the fourth top folding piece 4 at the top of the box inwards by 90° along the top edge; then fold the first top folding piece 1 and the second top folding piece 3 inwards by 90° along the top edge; next, fold the top tab 3b on the second top folding piece 3 inwards by 90° and insert it into the top tab 1a of the first top folding piece 1, thereby folding to form the second form, such as a rectangular box. Figure 6 As shown. In this way, the folding and unfolding operations of the top and bottom of the box are the same, making it more convenient to operate.

[0098] In some embodiments, the packaging box is a cardboard box, with the top, sides, and bottom of the box cut from a single piece of cardboard. The packaging box is formed from a single sheet of paper; exemplaryly, the cardboard is rectangular, formed along a line such as... Figure 1 The solid lines between adjacent folded pieces shown serve as cutting lines, used to cut the folded pieces that form the top and bottom of the box, facilitating processing; by following the lines shown... Figure 1 The dotted lines shown serve as folding lines, which, when folded, form a box that is shaped like a house or a cuboid.

[0099] Optionally, the first top folding piece 1, the second top folding piece 3, the first bottom folding piece 6, the second bottom folding piece 9, and the side folding pieces on the sides of the box are all rectangular. The first top folding piece 1, the second top folding piece 3, the first bottom folding piece 6, the second bottom folding piece 9, the first side folding piece 5, and the second side folding piece 10 are all the same length, and the overall length of the packaging box can be between 600-650mm, for example, 626mm.

[0100] The widths of the first top folding piece 1, the second top folding piece 3, the first bottom folding piece 6, and the second bottom folding piece 9 are all basically the same, and can be between 250-300mm, for example, 280mm. The widths of the first side folding piece 5 and the second side folding piece 10, which serve as the overall height of the packaging box, can be between 180-210mm. To achieve seamless folding of the top and bottom folding pieces, the width of the first side folding piece 5 is smaller than the width of the second side folding piece 10, for example, the width of the first side folding piece 5 can be 196mm, and the width of the second side folding piece 10 can be 201mm.

[0101] The width of the top tongue 3b on the second top folding piece 3 is the same as the width of the bottom tongue 9a on the second bottom folding piece 9, which can be between 50-60mm, for example, 52mm; at this time, the overall width of the second top folding piece 3 and the top tongue 3b, as well as the overall width of the second bottom folding piece 9 and the bottom tongue 9a, are all 332mm. The radius of the semi-circular groove on the first top folding piece 1 is 20mm.

[0102] The lengths of the third side folding piece 8 and the fourth side folding piece 12 are basically the same, and the overall width of the packaging box can be between 280-300mm; the length of the third side folding piece 8 is greater than the length of the fourth side folding piece 12, for example, the length of the third side folding piece 8 is 285mm; the length of the third side folding piece 8 is 284mm.

[0103] The width of the third side folding piece 8 and the fourth side folding piece 12 is the same, and can be between 190-200mm; for example, 191mm.

[0104] The third top fold piece 2, the fourth top fold piece 4, the third bottom fold piece 7, and the fourth bottom fold piece 11 are all trapezoidal. The length of the bottom base of the third top fold piece 2 and the third bottom fold piece 7 is the same as the length of the third side fold piece 8, for example, 285 mm. The length of the bottom base of the fourth top fold piece 4 and the fourth bottom fold piece 11 is the same as the length of the fourth side fold piece 12, for example, 284 mm.

[0105] The trapezoidal heights of the third top fold piece 2 and the fourth top fold piece 4 are the same, and can be between 250-300mm; for example, 270mm. The trapezoidal heights of the third bottom fold piece 7 and the fourth bottom fold piece 11 are the same, and can be between 300-330mm; for example, 316mm.

[0106] In this way, the overall length of the side of the box in the unfolded state is 1861mm.

[0107] The packaging box provided in this embodiment can be used to package household appliances such as sweepers, dust collectors, and electric fans, as well as other products such as electronic products like computers, food, furniture, books, and toys; it can also be used as a pet's sleeping bed; thus achieving multifunctionality and high utilization value.

[0108] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details of the above application are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0109] The block diagrams of devices, apparatuses, devices, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Unless otherwise defined, the technical or scientific terms used in the claims and description should have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar words used in the patent application description and claims of this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "an" or "a" and similar words do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" and similar words mean that the element or object preceding "comprising" or "including" encompasses the element or object listed following "comprising" or "including" and its equivalents, and do not exclude other elements or objects. The terms "connected," "coupled," or "linked" and similar words are not limited to physical or mechanical connections, nor are they limited to direct or indirect connections. Words such as “including,” “contains,” and “has” are open-ended words that mean “including but not limited to” and can be used interchangeably with them.

[0110] In this application, the terms "or" and "and / or" describe the relationship between related objects and indicate a non-exclusive inclusion. For example, "A and / or B" and "A or B" can include: only "A" exists, only "B" exists, and both "A" and "B" exist simultaneously, where "A" and "B" can be singular or plural. As another example, "A, B, and / or C" and "A, B, or C" can include: only "A" exists, only "B" exists, only "C" exists, both "A" and "B" exist simultaneously, both "A" and "C" exist simultaneously, both "B" and "C" exist simultaneously, and both "A", "B", and "C" exist simultaneously, where "A", "B", and "C" can be singular or plural. Furthermore, the symbol " / " in this application indicates an "or" relationship between the related objects before and after the symbol. In this application, the term "at least one A or B" has the same meaning as the aforementioned "A or B". The term "at least one A, B or C" has the same meaning as "A, B or C" above.

[0111] In the apparatus and equipment of this application, the components can be disassembled and / or reassembled. These disassemblies and / or reassemblies should be considered as equivalent solutions of this application.

[0112] The above description of the claimed aspects is provided to enable any person skilled in the art to make or use this application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of this application. Therefore, this application is not intended to be limited to the aspects shown herein, but rather to be applied within the widest scope consistent with the principles and novel features of this application.

[0113] The above description has been given for illustrative and descriptive purposes. Furthermore, this description is not intended to limit the embodiments of this application to the forms described herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A packaging box comprising a box top, a box side and a box bottom; said packaging box comprising a folded state and an unfolded state; in said unfolded state, said box top, said box side and said box bottom are unfolded in the same plane; characterized in that, The folded state includes at least a first folded state, in which the top, side and bottom of the box body cooperate to form a first-shaped receiving cavity; the first shape includes a main receiving cavity and a top expansion cavity located above the main receiving cavity, the main receiving cavity being formed by the side of the box body and having a top opening and a bottom opening; The top of the box includes a first top folding piece and a second top folding piece connected to the top edge of the side of the box; In the first folded state, the first top folding piece and the second top folding piece cooperate to close at least part of the top opening, and the top expansion cavity is formed by the cooperation of the first top folding piece and the second top folding piece; The bottom of the box includes a first bottom folding piece and a second bottom folding piece connected to the bottom edge of the side of the box; in the first folded state, the first bottom folding piece and the second bottom folding piece cooperate to close the bottom opening; In the unfolded state, the first top folding piece and the first bottom folding piece are symmetrically arranged with respect to the side of the box body; the second top folding piece and the second bottom folding piece are symmetrically arranged with respect to the side of the box body. The top edge is the side that forms the top opening when the side of the box is folded; the bottom edge is the side that forms the bottom opening when the side of the box is folded.

2. The packaging box according to claim 1, characterized in that, The top of the box also includes a third top folding piece and a fourth top folding piece, wherein the first top folding piece, the third top folding piece, the second top folding piece and the fourth top folding piece are sequentially connected to the top edge of the side of the box; In the first folded state, the third top fold piece and the fourth top fold piece are both supported inside the first top fold piece and the second top fold piece, and the first top fold piece, the third top fold piece, the second top fold piece and the fourth top fold piece cooperate to close the top opening and form the top expansion cavity; The bottom of the box also includes a third bottom folding piece and a fourth bottom folding piece, and the first bottom folding piece, the third bottom folding piece, the second bottom folding piece and the fourth bottom folding piece are sequentially connected to the bottom edge of the side of the box; in the first folded state, the third bottom folding piece and the fourth bottom folding piece are both supported on the inner side of the first bottom folding piece and the second bottom folding piece; In the unfolded state, at least a portion of the third top folding piece and the third bottom folding piece are symmetrically arranged relative to the side of the housing; and / or, in the unfolded state, at least a portion of the fourth top folding piece and the fourth bottom folding piece are symmetrically arranged relative to the side of the housing.

3. The packaging box according to claim 1, characterized in that, The folded state includes a second folded state, in which the top, side and bottom of the box body cooperate to form a second-shaped receiving cavity, which is different from the first-shaped cavity.

4. The packaging box according to claim 1, characterized in that, Both the first top folding piece and the second top folding piece can individually close the top opening; And / or, both the first bottom folding piece and the second bottom folding piece can individually close the bottom opening.

5. The packaging box according to claim 2, characterized in that, The first top folding piece, the second top folding piece, the first bottom folding piece, the second bottom folding piece, and each side folding piece on the side of the box body are all rectangular; And / or, the third top folding piece, the fourth top folding piece, the third bottom folding piece, and the fourth bottom folding piece are all trapezoidal, and the lower base of the trapezoid is connected to the side of the box body.

6. The packaging box according to claim 2, characterized in that, Each of the top folding panels on the top of the box can be folded and unfolded along the top edge. The first and second top folding panels have the same dimension perpendicular to the top edge; the third and fourth top folding panels have the same dimension perpendicular to the top edge. And / or, each bottom folding piece at the bottom of the box can be folded and unfolded along the bottom edge, the first bottom folding piece and the second bottom folding piece having the same dimension perpendicular to the bottom edge; the third bottom folding piece and the fourth bottom folding piece having the same dimension perpendicular to the bottom edge.

7. The packaging box according to claim 2, characterized in that, The third top folding piece is provided with a first folding line and a second folding line. The first folding line and the second folding line extend from two right-angled vertices of the third top folding piece near the side of the box body to the third top folding edge of the third top folding piece away from the side of the box body. The third top folding piece includes a first lug provided on the first folding line and a second lug provided on the second folding line. The fourth top folding piece is provided with a third folding line and a fourth folding line. The third folding line and the fourth folding line extend from two right-angle vertices of the fourth top folding piece near the side of the box body to the fourth top folding edge of the fourth top folding piece away from the side of the box body. The fourth top folding piece includes a third lug provided on the third folding line and a fourth lug provided on the fourth folding line. The first top folding piece is provided with a first snap-fit ​​hole and a fourth snap-fit ​​hole; the second top folding piece is provided with a second snap-fit ​​hole and a third snap-fit ​​hole. In the first folded state, the third top folding piece is folded along the top edge and along the first folding line and the second folding line; the fourth top folding piece is folded along the top edge and along the third folding line and the fourth folding line; the first top folding piece is folded along the top edge and abuts against the first folding line and the fourth folding line, and the first lug is inserted into the first snap-fit ​​hole, and the fourth lug is inserted into the fourth snap-fit ​​hole; the second top folding piece is folded along the top edge and abuts against the second folding line and the third folding line, and the second lug is inserted into the second snap-fit ​​hole, and the third lug is inserted into the third snap-fit ​​hole.

8. The packaging box according to claim 7, characterized in that, The first fold line and the second fold line intersect at the third top fold edge, and the first fold line, the second fold line, and the top edge together form a triangle; The third fold line and the fourth fold line intersect at the fourth top fold edge, and the third fold line, the fourth fold line and the top edge together form a triangle.

9. The packaging box according to claim 1, characterized in that, In the first folded state, the first top folding edge of the first top folding piece away from the side of the box abuts against the second top folding edge of the second top folding piece away from the side of the box, and the included angle formed by the first top folding piece and the second top folding piece toward the side of the top expansion cavity is 45° to 90°.

10. The packaging box according to any one of claims 1-9, characterized in that, The side of the box includes a first side folding piece, a third side folding piece, a second side folding piece, and a fourth side folding piece connected in sequence. One of the first side folding piece away from the first outer side edge of the third side folding piece and the fourth side folding piece away from the second side folding piece is provided with a side overlapping tongue. In the folded state, the side overlapping tongue is fixedly connected to the other side. And / or, one of the first top folding piece and the second top folding piece is provided with a top insertion interface at the position where it connects to the side of the box body, and the other is provided with a top insertion tongue on the outer folding edge away from the side of the box body. When the first top folding piece and the second top folding piece are folded, the top insertion tongue can be inserted into the top insertion interface. And / or, one of the first bottom folding piece and the second bottom folding piece is provided with a bottom insertion interface at the position where it connects to the side of the box body, and the other is provided with a bottom insertion tongue on the bottom folding edge away from the side of the box body. When the first bottom folding piece and the second bottom folding piece are folded, the bottom insertion tongue can be inserted into the bottom insertion interface. And / or, at least one of the first top folding piece, the second top folding piece, the first bottom folding piece, and the second bottom folding piece is provided with a gripping structure on the folding edge away from the side of the box body; And / or, a handle hole is provided on the side of the box.

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