A packaging box and a split type packaging profile fixing structure thereof

Abstract

The utility model relates to packing box technical field more specifically relates to a kind of packing box and the fixing structure of split type packing section bar of its split type, and packing box includes two side plate sections, each side plate section includes integrally formed and is connected by the first side plate and the second side plate of the adjacent side at right angle, and the adjacent side is fixed edge;Insertion buckle type fixing structure includes the first direction protruding first engagement portion towards on the first free side of first side plate and the second direction protruding second engagement portion towards on the second free side of second side plate, and second engagement portion includes the inner side and the outer side opposite in first direction, and the inner side is provided with the card slot matched with first engagement portion;Wherein, two side plate sections are formed packing box side panel by the first engagement portion and the card slot snap splice.It is simple and reliable to engage, convenient to splice, and the utility model improves the assembly efficiency and reusability of packing box.

Description

Technical Field

[0001] This utility model relates to the field of packaging box technology, and more specifically to a packaging box and its split packaging profile with a snap-fit ​​fixing structure. Background Technology

[0002] Packaging boxes made by foaming and molding plant fibers have the advantages of being virtually environmentally friendly, having a simple manufacturing process, low cost, wide availability of raw materials, and excellent shock absorption and vibration isolation performance.

[0003] Generally, packaging boxes made from plant fiber foam molding are made from plant fibers and additives such as starch. For example, patent document CN 101337374 B discloses a "method for manufacturing pure plant fiber expanded foam packaging material." When manufacturing the profiles, only the mold shape needs to be adjusted as required.

[0004] While this type of material is highly suitable for packaging, effectively solving the problems of high packaging costs and environmental pollution associated with paper, wood, and plastic packaging, directly molding the boxes results in larger spare boxes, which is not conducive to the storage and transportation of empty boxes. Furthermore, its material differs from cardboard, making it unsuitable for the stacking of empty boxes for backup.

[0005] Therefore, it is urgent to propose a new technical solution to address the problem. Utility Model Content

[0006] (a) Technical problems to be solved Based on this, the present invention provides a snap-fit ​​fixing structure for a packaging box and its split packaging profile, which is simple and reliable to engage and easy to assemble.

[0007] (II) Technical Solution To solve the above-mentioned technical problems, this utility model provides a snap-fit ​​fixing structure for a split packaging profile of a packaging box. The snap-fit ​​fixing structure includes a first engaging portion on a first free side of the first side plate and a second engaging portion protruding in the second direction on a second free side of the second side plate. The first engaging portion includes a first locking edge portion protruding in the first direction on the first free side of the first side plate, and the end of the first locking edge portion is further provided with a first locking head. The second engaging portion includes an inner side and an outer side opposite to each other in the first direction, and the inner side is provided with a locking groove that cooperates with the first engaging portion. The two side plate profiles are spliced ​​together by engaging the first engaging portion and the locking groove to form a side panel of the packaging box.

[0008] Preferably, the first card edge portion is coplanar with the inner surface of the first side plate, and the first card head extends along the second direction at the end of the first card edge portion; the card groove includes a strip-shaped groove located near the inner side of the second engaging portion that mates with the first card edge portion, and a fixing groove located at the bottom of the strip-shaped groove that mates with the first card head.

[0009] Preferably, the outer surface of the second engaging portion is coplanar with the outer surface of the second side plate, and the thickness of the second engaging portion in the second direction is greater than the thickness of the first side plate; the inner surface of the second engaging portion is coplanar with the inner surface of the second side plate, and the thickness of the second engaging portion in the first direction is greater than the thickness of the second side plate.

[0010] Preferably, the outer surface of the first card edge portion is lower than the outer surface of the first side plate, and a step is formed on the outer surface of the first card edge portion and the outer surface of the first side plate, wherein the thickness of the step in the direction perpendicular to the plane of the first side plate is the same as the thickness of the strip groove in the first direction.

[0011] Preferably, the length of the first card edge portion is the same as the length of the first card head portion, and the length of the first card edge portion is the same as the length of the first free side portion; the length of the second engaging portion is the same as the length of the card slot, and the length of the second engaging portion is the same as the length of the second free side portion.

[0012] Preferably, the first engaging portion is a convex 7-shaped engaging portion or a convex T-shaped engaging portion; the first card edge forms the first side of the convex 7-shaped engaging portion or the convex T-shaped engaging portion, and the first card head forms a second side adjacent to the first side of the convex 7-shaped engaging portion or the convex T-shaped engaging portion at the end of the first card edge; the fixing groove formed on the inner side of the second engaging portion is a concave 7-shaped card groove or a concave T-shaped card groove; wherein, the two side panel profiles are joined together by the convex 7-shaped engaging portion or the convex T-shaped engaging portion and the concave 7-shaped card groove or the concave T-shaped card groove to form the side panel of the packaging box.

[0013] Preferably, the first engaging part is a convex spherical engaging part, and the fixing groove formed on the inner side of the second engaging part is a concave spherical groove; wherein, the two side plate profiles are joined together by the convex spherical engaging part and the concave spherical groove to form the side panel of the packaging box.

[0014] Preferably, the packaging box further includes a cover profile, the cover profile including a top cover, the top cover having a third engaging part, and the top of the side panel of the packaging box having a fourth engaging part that cooperates with the third engaging part. The third engaging part on the top cover engages with the second engaging part on the top of the side panel of the packaging box, so that the cover profile engages with the top of the side panel of the packaging box formed by splicing the two side panel profiles.

[0015] In a second aspect, this utility model provides a packaging box, the packaging box comprising two side panel profiles and a cover profile; the two side panel profiles are spliced ​​together by the snap-fit ​​fixing structure to form a side panel of the packaging box; the cover profile covers the top and / or bottom of the side panel of the packaging box.

[0016] (III) Beneficial Effects Compared with the prior art, the present invention has at least the following technical effects: 1. The snap-fit ​​fixing structure provided by this utility model achieves quick snap-fit ​​splicing of two side panel profiles by the mutual cooperation of the first snap-fit ​​part and the snap-fit ​​part with the slots on the second snap-fit ​​part.

[0017] 2. The snap-fit ​​fixing structure provided by this utility model is simple and reliable in the assembly process, which greatly improves the assembly efficiency of the packaging box.

[0018] 3. The snap-on fixing structure provided by this utility model is easy to disassemble and reuse, effectively improving the reuse rate of packaging boxes and reducing packaging costs. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort. In the drawings: Figure 1 This is a structural schematic diagram of a packaging box provided by this utility model; Figure 2 This is a schematic diagram of another embodiment of the packaging box provided by this utility model; Figure 3 yes Figure 1 An exploded view of the packaging box provided by this utility model; Figure 4 yes Figure 2 An exploded view of the packaging box provided by this utility model; Figure 5 yes Figure 3A first-view structural schematic diagram of the side panel profile of the medium-sized packaging box; Figure 6 yes Figure 3 A structural schematic diagram of the middle side panel profile from a second perspective; Figure 7 yes Figure 3 A third-view structural schematic diagram of the middle side panel profile; Figure 8 yes Figure 4 A first-view structural schematic diagram of the side panel profile of the medium-sized packaging box; Figure 9 yes Figure 4 A structural schematic diagram of the middle side panel profile from a second perspective; Figure 10 yes Figure 4 A third-view structural schematic diagram of the middle side panel profile; Figure 11 yes Figure 5 A magnified view of part A of the middle side panel profile; Figure 12 yes Figure 6 A magnified view of part B of the middle side panel profile; Figure 13 yes Figure 8 A magnified view of section C of the middle side panel profile; Figure 14 yes Figure 9 A magnified view of part D of the middle side panel profile; Figure 15 This is a schematic diagram of the structure of the side panel of the packaging box provided by this utility model; Figure 16 yes Figure 15 A magnified view of section E on the side panel of the inner packaging box; Figure 17 This is a schematic diagram of another embodiment of the packaging box side panel provided by this utility model; Figure 18 yes Figure 17 A magnified view of section F on the side panel of the inner packaging box; Figure 19 This is a bottom view of the packaging box provided by this utility model; Figure 20 This is a bottom view of another embodiment of the packaging box provided by this utility model; Figure 21 This is a schematic diagram of the structure of the triangular base plate provided by this utility model; Figure 22 This is a structural schematic diagram of the cover plate profile provided by this utility model; Figure 23 This is a structural schematic diagram of another embodiment of the cover plate profile provided by this utility model.

[0020] Explanation of the labels for the main components in the diagram: 100. Packaging box; 200. Side panel profile; 300. Snap-on fixing structure; 400. Side panel of packaging box; 10. First side plate; 11. First free side; 12. First engaging part; 1211, 1212. First engaging edge; 1221, 1222. First engaging head; 20. Second side plate; 21. Second free side; 22. Second engaging part; 221. Inner side; 222. Outer side; 23. Slot; 231. Strip groove; 232. Fixing groove; 30. Triangular base plate; 31. Straight edge; 32. Hook edge; 33. Beveled edge; 34. Notch; 35. Engraved edge; 36. Upper beveled edge; 37. Lower beveled edge; 40. Cover plate profile; 41. Top cover; 42. Third locking part; 50. Fixed edge; 60. Fourth locking part. Detailed Implementation

[0021] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings; many specific details are set forth in the following description in order to provide a full understanding of this utility model; based on the embodiments of this utility model, those skilled in the art can make similar improvements without departing from the spirit of this utility model, but cannot make all other embodiments obtained without creative effort, therefore this utility model is not limited to the specific embodiments disclosed below.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components; and they can also refer to a "transmission connection," that is, a power connection through various suitable methods such as belt drive, gear drive, or sprocket drive. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] Please see Figures 1 to 23To address the problems of large packaging box volume, inconvenience in empty box storage and transportation, and low reusability, this utility model provides a packaging box 100 and its split packaging profile with a snap-fit ​​fixing structure 300. The packaging box 100 includes two side panel profiles 200. Each side panel profile 200 includes a first side panel 10 and a second side panel 20 integrally formed and connected at right angles through adjacent sides. The adjacent sides are fixed edges 50. The first side panel 10 extends in a first direction of the fixed edge 50, and the second side panel 20 extends in a second direction of the fixed edge 50.

[0024] Furthermore, the snap-fit ​​fixing structure 300 includes a first engaging portion 12 protruding in a first direction on the first free side 11 of the first side plate 10 and a second engaging portion 22 protruding in a second direction on the second free side 21 of the second side plate 20. The second engaging portion 22 includes an inner side 221 and an outer side 222 opposite to each other in the first direction. A slot 23 that mates with the first engaging portion 12 is provided on the inner side 221. The two side plate profiles 200 are spliced ​​together by engaging the first engaging portion 12 and the slot 23 to form a packaging box side panel 400.

[0025] Specifically, during assembly, the first engaging part 12 of one side panel profile 200 is aligned with the slot 23 of the other side panel profile 200, and pushed along its height direction so that the first engaging part 12 is engaged into the slot 23, thus completing the engagement and splicing of the two side panel profiles 200.

[0026] The snap-fit ​​fixing structure 300 provided by this utility model has a simple and reliable snap-fit ​​structure, is easy to assemble, and requires no additional tools. It improves the assembly efficiency and reusability of the packaging box 100 and effectively reduces packaging costs.

[0027] It is understood that the term "integrated molding" in this embodiment can refer to a plastic structure integrally molded by injection molding; a material integrally molded by casting; or a structure integrally molded after curing a foamed material.

[0028] Preferably, in this embodiment, the structure can be integrally formed by thermoforming and curing organic fibers and starch-based adhesives, supplemented with inorganic fillers, release agents and other materials.

[0029] It should be noted that, Figure 6 , Figure 9 , Figure 12 , Figure 14 , Figure 15 , Figure 16 , Figure 17 , Figure 18 , Figure 19 and Figure 20The red auxiliary line (which only serves as an indicator in the diagram) marks the first free side 11. Figure 7 , Figure 10 , Figure 17 , Figure 18 , Figure 19 and Figure 20 The yellow auxiliary line (which only serves as an indicator in the diagram) marks the second free side 21. Figure 19 and Figure 20 The green auxiliary lines (which only serve as indicators in the diagram) are marked as the notch 34 and the protrusion 35 on the triangular base plate 30.

[0030] In one embodiment, the first engaging portion 12 includes a first engaging edge portion 121 that protrudes along a first direction on the first free side 11 and is coplanar with the inner surface of the first side plate 10, and a first engaging head portion 122 that extends along a second direction at the end of the first engaging edge portion 121; the slot 12 includes a strip groove 231 located near the inner side surface 221 of the second engaging portion 22 and cooperating with the first engaging edge portion 121, and a fixing groove 232 located at the bottom of the strip groove 231 and cooperating with the first engaging head portion 122.

[0031] Specifically, when engaged, the first locking edge 121 is inserted into the strip groove 231, and the first locking head 122 is engaged into the locking groove 232, forming an interlock to prevent the side panel profile 200 from disengaging.

[0032] Please combine them together Figure 11 and Figure 12 In this embodiment, the first card head 122 is strip-shaped, and the second side of the first card head 122 is adjacent to the first side of the first card edge 121 to form a 7-shaped buckle.

[0033] Please combine them together Figure 13 and Figure 14 In this embodiment, the first card head 122 is a ball-shaped structure with a roughly circular cross-section, and together with the first card edge 121, it forms a ball-shaped buckle structure.

[0034] In other embodiments, the first engaging portion 12 can adopt different shapes, such as the first engaging head 122 and the first engaging edge portion 121 forming a T-shape or other engaging structures; as long as when engaging, the first engaging edge portion 121 is inserted into the strip groove 231 and the first engaging head 122 is engaged into the slot 232, forming an interlocking structure.

[0035] Furthermore, the outer surface 222 of the second engaging portion 22 is coplanar with the outer surface of the second side plate 20, and the thickness of the second engaging portion 22 in the second direction is greater than the thickness of the first side plate 10; the inner surface 221 of the second engaging portion 22 is coplanar with the inner surface of the second side plate 20, and the thickness of the second engaging portion 22 in the first direction is greater than the thickness of the second side plate 20, thereby ensuring the stability and sealing of the two side plate profiles 200 when engaged, enhancing the strength and durability of the second engaging portion 22, and improving the overall stability of the packaging box 100.

[0036] In one embodiment, the outer surface of the first retaining edge 121 is lower than the outer surface of the first side plate 10, and a step (not shown) is formed on the outer surface of the first retaining edge 121 and the outer surface of the first side plate 10. The thickness of the step in the direction perpendicular to the plane of the first side plate 10 is the same as the thickness of the strip groove 231 in the first direction.

[0037] Specifically, the thickness of the step perpendicular to the plane of the first side plate 10 is the same as the thickness of the strip groove 231 in the first direction, so that the first locking edge 121 can be accurately inserted into the strip groove 231 and avoid loosening.

[0038] Furthermore, the length of the first card edge portion 121 is the same as the length of the first card head portion 122, and the length of the first card edge portion 121 is the same as the length of the first free side portion 11; the length of the second engaging portion 22 is the same as the length of the card slot 23, and the length of the second engaging portion 22 is the same as the length of the second free side portion 21, thereby ensuring full contact during engagement and improving connection strength.

[0039] Please see Figures 11 to 12 and Figures 15 to 16 In one embodiment, the first engaging part 12 is a convex 7-shaped engaging part, and the fixing groove 232 formed on the inner side surface 221 of the second engaging part 22 is a concave 7-shaped groove; wherein, the two side panel profiles 200 are joined together by the convex 7-shaped engaging part and the concave 7-shaped groove to form the side panel 400 of the packaging box.

[0040] Further, please refer to Figures 13 to 14 and Figures 17 to 18 The first engaging part 12 can also be a convex spherical engaging part, and the fixing groove 232 formed on the inner side surface 221 of the second engaging part 22 is a concave spherical groove; wherein, the two side plate profiles 200 are spliced ​​together by engaging the convex spherical engaging part and the concave spherical groove to form the side panel 400 of the packaging box.

[0041] Please see Figure 21In one embodiment, the packaging box 100 further includes a bottom plate engaging structure (not shown in the figure). The side plate profile 200 also includes a triangular base plate 30. The edge of the triangular base plate 30 adjacent to the outer surface of the first side plate 10 is a strand edge 31, and the edge adjacent to the outer surface of the second side plate 20 is a hook edge 32. A triangular notch 34 is formed at the intersection of the strand edge 31 and the hypotenuse 33 of the triangular base plate 30. The hypotenuse of the notch 34 coincides with the hypotenuse 33 of the triangular base plate 30, and the apex of the notch 34 coincides with the endpoint of the strand edge 31. The height of the notch 34 is greater than the thickness of the first side plate 10. The long side of 34 coincides with the side 31; the intersection of the hook edge 32 and the hypotenuse 33 of the triangular base plate 30 forms a triangular protrusion 35 that is coplanar with the triangular base plate 30. The hypotenuse of the protrusion 35 coincides with the hypotenuse 33 of the triangular base plate 30, the vertex of the protrusion 35 coincides with the endpoint of the hook edge 32, the height of the protrusion 35 is greater than the height of the second side plate 20, and the long side of the protrusion 35 coincides with the side 31, thereby achieving a stable connection when the triangular base plate 30 is spliced ​​with the first side plate 10 and the second side plate 20.

[0042] Further, please refer to Figure 21 An upper inclined retaining edge 36, coplanar with the triangular base plate 30, extends from the hypotenuse 33 near the notch 34. A lower inclined retaining edge 37, coplanar with the triangular base plate 30, extends from the hypotenuse 33 near the retaining protrusion 35. The upper inclined retaining edge 36 and the lower inclined retaining edge 37 have the same length along the hypotenuse 33 of the triangular base plate 30, and each occupies half the length of the hypotenuse 33 of the triangular base plate 30. This ensures that the two side plate profiles 200 are subjected to more even force when spliced, thereby ensuring their balance and stability when engaged.

[0043] Furthermore, the upper inclined edge 36 is an upper inclined edge (not shown) that protrudes from the inclined side 33 of the triangular base plate 30 and is coplanar with the outer surface of the triangular base plate 30. The outer surface of the upper inclined edge is higher than the outer surface of the inclined side 33 of the triangular base plate, and an inner step is formed on the upper inclined edge and the outer surface of the triangular base plate 30 (not shown). The lower inclined edge 37 is a lower inclined edge (not shown) that protrudes from the inclined side 33 of the triangular base plate 30 and is coplanar with the inner surface of the triangular base plate 30. The inner surface of the lower inclined edge is higher than the inner surface of the inclined side 33 of the triangular base plate, and an outer step is formed on the lower inclined edge and the inner surface of the triangular base plate 30 (not shown). The thickness of the outer step on the inner surface of the triangular base plate 30 is the same as that of the upper inclined edge, and the thickness of the inner step on the outer surface of the triangular base plate 30 is the same as that of the lower inclined edge.

[0044] Specifically, when the two side panel profiles 200 are spliced, the inner step of one side panel profile 200 engages with the outer step of the other side panel profile 200, and the outer step of one side panel profile 200 engages with the inner step of the other side panel profile 200. Since the thickness of the inner step on the outer surface of the triangular base plate 30 is the same as the thickness of the upper edge, and the thickness of the outer step on the inner surface of the triangular base plate 30 is the same as the thickness of the lower edge, a tight engagement between the upper and lower edges is achieved, thereby ensuring the stability of the splicing and engagement of the two side panel profiles 200.

[0045] It is understood that the structure in the above embodiment, which uses the triangular base plate 30 to limit the sliding of the snap-fit ​​fixing structure 300 of the side panel profile 200, is merely a preferred example and is not a limitation. Other methods can also be used, such as applying glue to the joints of the side panel profiles 200 to fix them together; or, by adding an additional cover plate profile 40, the side panel profile 200 can be fixed to the cover plate profile 40, achieving the effect of limiting the sliding of the snap-fit ​​fixing structure 300 of the side panel profile 200.

[0046] Please see Figures 22 to 23 In another embodiment, the packaging box 100 may further include a cover profile 40, the cover profile 40 including a top cover 41, the top cover 41 being provided with a third engaging structure 42, and the top of the packaging box side panel 400 being provided with a fourth engaging structure 60 that cooperates with the third engaging structure 42. The third engaging structure 42 on the top cover 41 engages with the fourth engaging structure 60 on the top of the packaging box side panel 400, thereby realizing that the cover profile 40 is engaged with the two side panel profiles 200 and spliced ​​together to form the top of the packaging box side panel 400.

[0047] By engaging the third engaging structure 42 on the top cover 41 with the fourth engaging structure 60 on the top of the side panel 400 of the packaging box, the cover profile 40 is securely engaged with the top of the side panel 400 of the packaging box formed by splicing the two side panel profiles 200, thereby achieving the closure of the packaging box 100.

[0048] It should be noted that in this embodiment, the top cover 41 is the cover body 40 itself, and the bottom of the side panel 400 of the packaging box is spliced ​​together by two triangular base plates 30, thereby achieving a seal on the bottom surface of the side panel 400 of the packaging box.

[0049] Preferably, in other specific embodiments, the side panel profile 200 does not have a formed triangular base plate 30; the cover profile 40 includes a top cover 41 and a bottom cover (not shown in the figure). The top cover 41 covers the top of the side panel 400 of the packaging box, and the bottom cover covers the bottom of the side panel 400 of the packaging box. The double-cover design of the top cover 41 and the bottom cover provides a complete closed space for the packaging box 100. In this embodiment, the bottom cover can be used to splice the bottom of the two side panel profiles 200, thereby restricting the sliding of the snap-fit ​​fixing structure 300; the top cover 41 can limit the sliding of the snap-fit ​​fixing structure 300 of the side panel profile 200.

[0050] In one embodiment, the packaging box 100 includes two side panel profiles 200 and a cover profile 40. Specifically, the two side panel profiles 200 are spliced ​​together by a snap-fit ​​fixing structure 300 to form a side panel 400 of the packaging box. The triangular base plate 30 is connected to the bottom of the side panel 400 of the packaging box by a snap-fit ​​structure on the inclined side 33. The cover profile 40 is placed on the top of the side panel 400 of the packaging box, thereby forming a complete packaging box 100. The overall structure of the packaging box 100 is stable and easy to disassemble and reuse.

[0051] Compared with the prior art, the present invention has at least the following technical effects: 1. The snap-fit ​​fixing structure 300 provided by this utility model achieves quick snap-fit ​​splicing of two side plate profiles 200 by the mutual cooperation of the first snap-fit ​​part 12 and the snap-fit ​​part 22 with the slot 23.

[0052] 2. The snap-fit ​​fixing structure 300 provided by this utility model has a simple and reliable assembly process, which greatly improves the assembly efficiency of the packaging box 100.

[0053] 3. The snap-on fixing structure 300 provided by this utility model is easy to disassemble and reuse, effectively improving the reuse rate of the packaging box 100 and reducing packaging costs.

[0054] Obviously, the above embodiments are merely examples for the detailed description of this utility model, and are not intended to limit the implementation. This utility model can be implemented in many other ways different from those described herein. Although the embodiments of this utility model have been described in conjunction with the accompanying drawings, those skilled in the art can make other modifications and variations based on the above description, and such modifications and variations still fall within the protection scope defined by the appended claims.

Claims

1. A snap-fit ​​fixing structure for a split packaging profile of a packaging box, the packaging box comprising two side panel profiles, each side panel profile comprising an integrally formed first side panel and a second side panel connected at right angles by adjacent side edges; the adjacent side edges are fixed edges, the first side panel extending in a first direction of the fixed edges, and the second side panel extending in a second direction of the fixed edges; characterized in that, The snap-fit ​​fixing structure includes a first engaging portion disposed on the first free side of the first side plate and a second engaging portion disposed on the second free side of the second side plate protruding toward the second direction; wherein, the first engaging portion includes a first locking edge portion disposed on the first free side of the first side plate protruding toward the first direction, and the end of the first locking edge portion is further provided with a first locking head. The second engaging portion includes an inner side and an outer side opposite to each other in the first direction, and the inner side is provided with a groove that mates with the first engaging portion; The two side panel profiles are joined together by the first engaging part and the slot to form the side panel of the packaging box.

2. The snap-fit ​​fixing structure according to claim 1, characterized in that, The first card edge portion is coplanar with the inner surface of the first side plate, and the first card head extends along the second direction at the end of the first card edge portion; The card slot includes a strip-shaped groove located near the inner side of the second engaging portion that mates with the first card edge portion, and a fixing groove located at the bottom of the strip-shaped groove that mates with the first card head portion.

3. The snap-fit ​​fixing structure according to claim 2, characterized in that, The outer surface of the second engaging portion is coplanar with the outer surface of the second side plate, and the thickness of the second engaging portion in the second direction is greater than the thickness of the first side plate; the inner surface of the second engaging portion is coplanar with the inner surface of the second side plate, and the thickness of the second engaging portion in the first direction is greater than the thickness of the second side plate.

4. The snap-fit ​​fixing structure according to claim 3, characterized in that, The outer surface of the first card edge is lower than the outer surface of the first side plate, and a step is formed on the outer surface of the first card edge and the outer surface of the first side plate. The thickness of the step in the direction perpendicular to the plane of the first side plate is the same as the thickness of the strip groove in the first direction.

5. The snap-fit ​​fixing structure according to claim 4, characterized in that, The length of the first card edge portion is the same as the length of the first card head portion, and the length of the first card edge portion is the same as the length of the first free side portion; the length of the second engaging portion is the same as the length of the card slot, and the length of the second engaging portion is the same as the length of the second free side portion.

6. The snap-fit ​​fixing structure according to claim 5, characterized in that, The first engaging portion is a convex 7-shaped engaging portion or a convex T-shaped engaging portion; the first card edge portion forms the first side of the convex 7-shaped engaging portion or the convex T-shaped engaging portion, and the first card head portion forms a second side at the end of the first card edge portion that is adjacent to the first side of the convex 7-shaped engaging portion or the convex T-shaped engaging portion. The fixing groove formed on the inner side of the second engaging part is a concave 7-shaped groove or a concave T-shaped groove; wherein, the two side panel profiles are engaged and spliced ​​with the convex 7-shaped engaging part or the convex T-shaped engaging part and the concave 7-shaped groove or the concave T-shaped groove to form the side panel of the packaging box.

7. The snap-fit ​​fixing structure according to claim 5, characterized in that, The first engaging part is a convex spherical engaging part, and the fixing groove formed on the inner side of the second engaging part is a concave spherical groove; wherein, the two side plate profiles are joined together by the convex spherical engaging part and the concave spherical groove to form the side panel of the packaging box.

8. The snap-fit ​​fixing structure according to any one of claims 1-7, characterized in that, The packaging box also includes a cover profile, which includes a top cover. The top cover has a third engaging part, and the top of the side panel of the packaging box has a fourth engaging part that cooperates with the third engaging part. The third engaging part on the top cover engages with the second engaging part on the top of the side panel of the packaging box, so that the cover profile is engaged with the top of the side panel of the packaging box formed by splicing the two side panel profiles.

9. A packaging box, characterized in that, The packaging box includes two side panel profiles and a cover profile; the two side panel profiles are spliced ​​together by a snap-fit ​​fixing structure as described in any one of claims 1 to 8 to form a side panel of the packaging box; the cover profile covers the top and / or bottom of the side panel of the packaging box.

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