A straight quadrangular prism packaging box and a side edge engaging structure of a split packaging profile thereof

Abstract

The utility model relates to a kind of straight four-prism packing box and its split type packing section side edge engaging structure, this side edge engaging structure includes the upper side hook portion and lower side engaging edge portion of first free side edge being equipped in first side plate and the upper side engaging edge portion and lower side hook portion of second free side edge being equipped in second side plate;Wherein, the splicing of two side plate sections is opposite, the upper side engaging edge portion of a side plate section can be engaged with the upper side hook portion of another side plate section, the lower side hook portion is engaged with the lower side engaging edge portion, to make two side plate sections splicing form straight four-prism packing box side plate.The side edge engaging structure provided by the utility model, engaging structure is simple and reliable, splicing is convenient, does not need additional tool, improve the assembly efficiency and reusability of packing box, effectively reduce packing cost, and its split type packing section can be stacked and stored when not being assembled, and it occupies small space.

Description

Technical Field

[0001] This utility model relates to the field of packaging box technology, and more specifically to a straight quadrangular prism packaging box and its split packaging profile side locking 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] In the prior art, packaging boxes are made of plant fibers and additives such as starch. Preparation methods include those disclosed in patent document CN 101377395 B, "Molded Firework Outer Cylinder, Firework Ball Shell and its Manufacturing Method"; and patent document CN 101337374 B, "A Manufacturing Method of Pure Plant Fiber Expanded Foamed Packaging Material," etc. When manufacturing the profiles, only the mold shape needs to be adjusted as required.

[0004] 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. However, directly molding the packaging 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 stacking 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 straight quadrangular prism packaging box and its split packaging profile side interlocking structure, which can be stacked and stored, occupies little space, is easy to assemble, facilitates the transportation of empty packaging boxes, can be reused, and effectively reduces the cost of packaging boxes.

[0007] (II) Technical Solution To solve the above-mentioned technical problems, this utility model provides a side-locking structure for a split packaging profile of a straight quadrangular prism packaging box. The side-locking structure includes an upper hook portion and a lower edge portion provided on the first free side of the first side plate, and an upper edge portion and a lower hook portion provided on the second free side of the second side plate. The two side plate profiles are spliced ​​together opposite each other, and the upper edge portion of one side plate profile can engage with the upper hook portion of the other side plate profile, and the lower hook portion engages with the lower edge portion, so that the two side plate profiles are spliced ​​together to form a straight quadrangular prism-shaped packaging box side plate.

[0008] Preferably, the adjacent side edges are fixed edges, with the first side plate extending in a first direction and the second side plate extending in a second direction; wherein, the lower locking edge is located in the lower half of the first free side edge, and the lower locking edge is a lower locking edge protruding along the first direction on the first free side edge; the upper locking hook is located in the upper half of the first free side edge, and the upper locking hook includes a first extension coplanar with the first side plate protruding along the first direction on the first free side edge and a portion extending from the first extension... A second extension portion extending along the second direction at the end of the extension portion forms an L-shaped upper hook; the upper hook edge portion is provided on the upper half of the second free side, and the upper hook edge portion is an upper hook edge protruding along the second direction on the second free side; the lower hook portion is provided on the lower half of the second free side, and the lower hook portion includes a third extension portion protruding along the second direction on the second free side and coplanar with the second side plate, and a fourth extension portion extending along the first direction at the end of the third extension portion, to form an L-shaped lower hook.

[0009] Preferably, the outer surface of the lower side flange is lower than the outer surface of the first side plate, and a first step is formed between the lower side flange and the outer surface of the first side plate. The thickness of the first step in the direction perpendicular to the plane of the first side plate is the same as the thickness of the fourth extension in the second direction. The sum of the width of the first step in the direction along the plane of the first side plate and the thickness of the first side plate is the same as the length of the fourth extension in the first direction. The inner surface of the lower side flange is flush with the inner surface of the first side plate, and the extension length of the first extension in the first direction is the same as the thickness of the lower side flange in the direction perpendicular to the plane of the first side plate.

[0010] Preferably, the outer surface of the upper retaining edge is lower than the outer surface of the second side plate, and a second step is formed between the upper retaining edge and the outer surface of the second side plate. The thickness of the second step in the direction perpendicular to the plane of the second side plate is the same as the thickness of the second extension in the second direction. The sum of the width of the second step in the direction along the plane of the second side plate and the thickness of the second side plate is the same as the length of the second extension in the second direction. The inner surface of the upper retaining edge is flush with the inner surface of the second side plate, and the extension length of the third extension in the first direction is the same as the thickness of the upper retaining edge in the direction perpendicular to the plane of the second side plate.

[0011] Preferably, the lower edge portion and the upper hook portion each occupy half the length in the extension direction along the first free side of the first side plate.

[0012] Preferably, the side panel profile further includes a triangular base plate integrally formed with the first side panel and the second side panel, wherein the two right-angled sides of the base plate are integrally formed with the bottom edges of the first side panel and the second side panel, respectively.

[0013] Preferably, the edge of the base plate adjacent to the outer surface of the first side plate is a strand edge, and the edge adjacent to the outer surface of the second side plate is a hook edge; a triangular notch is formed at the junction of the strand edge and the hypotenuse of the base plate, the hypotenuse of the notch coincides with the hypotenuse of the base plate, the vertex of the notch coincides with the endpoint of the strand edge, the height of the notch is greater than the thickness of the first side plate, and the long side of the notch coincides with the strand edge; a triangular protrusion is formed at the junction of the hook edge and the hypotenuse of the base plate, coplanar with the base plate, the hypotenuse of the protrusion coincides with the hypotenuse of the base plate, the vertex of the protrusion coincides with the endpoint of the hook edge, the height of the protrusion is greater than the thickness of the second side plate, and the long side of the protrusion coincides with the strand edge.

[0014] Preferably, an upper inclined locking edge portion coplanar with the base plate extends from the inclined side of the base plate near the notch, and a lower inclined locking edge portion coplanar with the base plate extends from the inclined side of the base plate near the locking protrusion; the upper inclined locking edge portion and the lower inclined locking edge portion have the same length along the inclined side of the base plate, and each occupies half the length of the inclined side of the base plate.

[0015] Preferably, the upper inclined flange is an upper inclined flange that protrudes from the inclined side of the base plate and is coplanar with the outer surface of the base plate. The outer surface of the upper inclined flange is higher than the outer surface of the inclined side of the base plate, and an inner step is formed on the outer surface of the upper inclined flange and the base plate. The thickness of the inner step on the outer surface of the base plate is the same as that of the lower inclined flange. The lower inclined flange is a lower inclined flange that protrudes from the inclined side of the base plate and is coplanar with the inner surface of the base plate. The inner surface of the lower inclined flange is higher than the inner surface of the inclined side of the base plate, and an outer step is formed on the inner surface of the lower inclined flange and the base plate. The thickness of the outer step on the inner surface of the base plate is the same as that of the upper inclined flange.

[0016] In a second aspect, this utility model provides a straight quadrangular prism packaging box, wherein the packaging box is formed by the side snap-fit ​​structure.

[0017] (III) Beneficial Effects Compared with the prior art, the present invention has at least the following technical effects: 1. This utility model provides an upper hook and a lower edge on the first free side, and an upper edge and a lower hook on the second free side, so that the two side panel profiles can be spliced ​​together by side snapping to form a straight quadrangular prism packaging box side panel. The structure is simple and the splicing is convenient.

[0018] 2. The side-clamping structure provided by this utility model adopts a split design for the side plate profiles. When not assembled, it can be laid flat or stacked, which effectively reduces the volume of the empty box, reduces the space occupied by the empty box, and facilitates the storage and transportation of the empty box.

[0019] 3. The side-locking structure provided by this utility model is simple in structure. It can be quickly assembled and disassembled by simply using the locking structure on the side plate without any other tools. This improves the reusability and assembly efficiency of the packaging box, makes it easy to splice, has a high reusability rate, and effectively reduces the overall cost of the packaging box.

[0020] 4. The packaging box provided by this utility model has a split profile made of plant fiber molding, which is highly environmentally friendly. At the same time, the interlocking structure on its side panel profile is precisely matched, so that the overall strength and stability of the packaging box are high. Attached Figure Description

[0021] 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 straight quadrangular prism packaging box provided by this utility model; Figure 2 This is an exploded view of the side panel profile provided by this utility model; Figure 3 yes Figure 2 A structural schematic diagram of the first side plate provided by the middle side plate profile; Figure 4 yes Figure 2 A structural schematic diagram of the second side plate provided by the middle side plate profile; Figure 5 yes Figure 3 Cross-sectional view of the middle side panel profile; Figure 6 yes Figure 5 A partially enlarged view of the side interlocking structure of the first side plate at point A; Figure 7 yes Figure 5 A partially enlarged view of the side interlocking structure of the second side plate at point B; Figure 8 yes Figure 2 A structural diagram of the base plate provided by the middle side plate profile.

[0022] Explanation of the labels for the main components in the diagram: 100. Straight rectangular prism packaging box; 200. Side panel profile; 300. Side snap-fit ​​structure; 10. First side plate; 11. First free side edge; 12. Upper hook portion; 121. First extension portion; 122. Second extension portion; 13. Lower hook edge portion; 14. First reinforcing rib; 15. Second reinforcing rib; 20. Second side plate; 21. Second free side; 22. Upper locking edge; 23. Lower locking hook; 231. Third extension; 232. Fourth extension; 30. Fixed edge; 40. Base plate; 41. Edge; 42. Hook edge; 43. Bevel edge; 44. Notch; 45. Socket protrusion; 46. Upper beveled socket edge; 47. Lower beveled socket edge. Detailed Implementation

[0023] 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.

[0024] 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.

[0025] Please see Figures 1 to 8To address the issue of large packaging box volume hindering the storage and transportation of empty boxes, this utility model provides a side-locking structure 300 for a split packaging profile of a straight quadrangular prism packaging box 100. This side-locking structure 300 includes an upper hook portion 12 and a lower edge portion 13 disposed on the first free side 11 of the first side plate 10, and an upper edge portion 22 and a lower hook portion 23 disposed on the second free side 21 of the second side plate 20. The two side plate profiles 200 are spliced ​​together, with the upper edge portion 22 of one side plate profile 200 engaging with the upper hook portion 12 of the other side plate profile 200, and the lower hook portion 23 engaging with the lower edge portion 13, so that the two side plate profiles 200 are spliced ​​together to form a straight quadrangular prism-shaped packaging box side panel (not shown in the figure).

[0026] The side-locking structure 300 provided by this utility model is simple, reliable, 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] Please refer to Figures 1 to 4 The straight quadrangular prism packaging box 100 is assembled from two side panel profiles 200 by a side snap-fit ​​structure 300; the side snap-fit ​​structure includes a first snap-fit ​​structure (not shown in the figure), a second snap-fit ​​structure (not shown in the figure) that matches and snaps with the first snap-fit ​​structure, a third snap-fit ​​structure (not shown in the figure), and a fourth snap-fit ​​structure (not shown in the figure) that matches and snaps with the third snap-fit ​​structure.

[0028] Each side panel profile 200 includes a first side panel 10 and a second side panel 20, which are integrally formed by connecting adjacent sides at right angles.

[0029] 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.

[0030] 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.

[0031] The first side plate 10 has a first engaging structure on its first free side 11, and the second side plate 20 has a second engaging structure 122 on its second free side 21 that engages with the first engaging structure. The first engaging structure 112 includes an upper hook portion 12 on the upper half of the first free side 11 of the first side plate 10 and a lower hook edge portion 13 on the lower half of the first free side 11 of the first side plate 10. The second engaging structure 122 includes an upper hook edge portion 22 on the upper half of the second free side 21 of the second side plate 20 and a lower hook portion 23 on the lower half of the second free side 21 of the second side plate 20.

[0032] There are two side panel profiles 200. The two side panel profiles 200 are spliced ​​together opposite each other. The upper edge 22 of one side panel profile 200 can be engaged with the upper hook 12 of the other side panel profile 200. At the same time, the upper hook 12 of the side panel profile 200 is engaged with the lower edge 13 of the other side panel profile 200. Thus, the two side panel profiles 200 are spliced ​​together to form a quadrangular prism-shaped packaging box side panel. The upper and lower engagement forms an interlocking structure, thereby ensuring the firm connection of the packaging side panel 200.

[0033] In one embodiment, see Figures 3 to 6 The adjacent sides of the first side plate 10 and the second side plate 20, which are integrally formed, are fixed edges 30. The first side plate 10 extends in the first direction of the fixed edge 30, and the second side plate 20 extends in the second direction of the fixed edge 30.

[0034] Furthermore, the lower edge portion 13 is provided on the lower half of the first free side 11, and the lower edge portion 13 is a lower edge that protrudes from the first free side 11 along a first direction; the upper hook portion 12 is provided on the upper half of the first free side 11, and the upper hook portion 12 includes a first extension portion 121 that protrudes from the first free side 11 along a first direction and is coplanar with the first side plate 10, and a first extension portion 122 that extends from the end of the first extension portion 121 along a second direction, so as to form an upper hook with an L-shaped structure, so as to engage with the lower edge.

[0035] Furthermore, the upper edge portion 22 is provided on the upper half of the second free side 21, and the upper edge portion 22 is an upper edge that protrudes from the second free side 21 along the second direction; the lower hook portion 23 is provided on the lower half of the second free side 21, and the lower hook portion 23 includes a third extension portion 231 that protrudes from the second free side 21 along the second direction and is coplanar with the second side plate 20, and a fourth extension portion 232 that extends from the end of the third extension portion 231 along the first direction, so as to form an L-shaped lower hook to facilitate engagement with the upper edge.

[0036] In one embodiment, the outer surface of the lower edge is lower than the outer surface of the first side plate 10, and a first step (not shown) is formed between the lower edge and the outer surface of the first side plate 10. The thickness of the first step in the direction perpendicular to the plane of the first side plate 10 is the same as the thickness of the fourth extension 232 in the second direction. The sum of the width of the first step in the direction along the plane of the first side plate 10 and the thickness of the first side plate 12 is the same as the length of the fourth extension 232 in the first direction, so as to ensure that the surface is flat and the structure is tight when engaged, thereby ensuring that the inner and outer surfaces are aligned when engaged and avoiding gaps.

[0037] Furthermore, the inner surface of the lower edge is flush with the inner surface of the first side plate 10, and the extension length of the first extension 121 along the first direction is consistent with the thickness of the lower edge in the direction perpendicular to the plane of the first side plate 10, so as to ensure a tight fit when engaged, thereby ensuring that the inner and outer surfaces are aligned when engaged and avoiding gaps.

[0038] Furthermore, the outer surface of the upper retaining edge is lower than the outer surface of the second side plate 20, and a second step (not shown in the figure) is formed between the upper retaining edge and the outer surface of the second side plate 20. The thickness of the second step in the direction perpendicular to the plane of the second side plate 20 is the same as the thickness of the first extension 122 in the second direction. The sum of the width of the second step in the direction along the plane of the second side plate 20 and the thickness of the second side plate 20 is the same as the length of the first extension 122 in the second direction, so as to ensure that the surface is flat and the structure is tight when engaged, thereby ensuring that the inner and outer surfaces are aligned when engaged and avoiding gaps.

[0039] Furthermore, the inner surface of the upper edge is flush with the inner surface of the second side plate 20, and the extension length of the third extension 231 along the first direction is consistent with the thickness of the upper edge in the direction perpendicular to the plane of the second side plate 20, so as to ensure a tight fit when engaged, thereby ensuring that the inner and outer surfaces are aligned when engaged and avoiding gaps.

[0040] Since the lower edge portion 13 and the upper hook portion 12 both protrude from the first free side 11, and the upper edge portion 22 and the lower hook portion 23 both protrude from the second free side 21; the lower hook portion 23 on the first free side 11 and the upper hook portion 12 abut against each other in the lateral direction, the lower hook portion 23 prevents the first side plate 10 from sliding downward, and the upper hook portion 12 prevents the second side plate 20 from sliding upward.

[0041] At the same time, please combine Figure 1 Through the size design of each component of the first and second interlocking structures 122, the outer surface of the assembled straight quadrangular prism environmentally friendly packaging box 100 is a smooth plane without steps, with a simple appearance and less prone to bumps and knocks.

[0042] Further, please refer to Figure 3 and Figure 6 The lower edge portion 13 and the upper hook portion 12 each occupy half the length along the extension direction of the first free side 11. That is, the upper half of the first free side 11 is the upper hook portion 12, and the lower half of the first free side 11 is the lower edge portion 13, so that the overall locking structure is evenly distributed and the splicing stability is improved.

[0043] In one embodiment, the straight quadrangular prism packaging box 100 further includes a cover plate profile (not shown in the figure), the cover plate profile is provided with a third engaging structure, and the top of the first side plate 10 and the second side plate 20 is provided with a fourth engaging structure that cooperates with the third engaging structure; the third engaging structure on the cover plate profile is spliced ​​with the fourth engaging structure on the top of the side plate profile 200 to realize that the cover plate profile is engaged with the top of the side panel of the packaging box formed by splicing the two side plate profiles 200.

[0044] Specifically, after the two side panel profiles 200 are spliced ​​together to form the side panel of the packaging box, the cover profile is engaged with the fourth engagement structure through the third engagement structure, so that the cover profile covers the top of the straight quadrangular prism packaging box 100 to achieve the sealing function.

[0045] Understandably, the latching method between the cover profile and the top of the first side panel 10 and the second side panel 20 can be either a tight latch or a loose latch; the locking method can be set according to needs. For example, when the packaging box 100 is used as a courier box, since the courier box itself also needs to be sealed with tape, a loose latching method with protrusions and grooves can be used. When the packaging box 100 is used as a storage box or in other situations where the lid cannot be easily opened, a tight latching method can be used, such as a hook structure or a locking structure, to achieve the latching between the cover and the box body.

[0046] In one embodiment, see Figure 2 and Figure 8 The side panel profile 200 also includes a triangular base plate 40 integrally formed with the first side panel 10 and the second side panel 20. The two right-angled sides of the base plate 40 are respectively fixed to the bottom edges of the first side panel 10 and the second side panel 20 to form an integral structure and enhance the load-bearing capacity of the bottom of the packaging box 100.

[0047] The edge of the triangular base plate 40 adjacent to the outer surface of the first side plate 10 is called the rib edge 41, and the edge adjacent to the outer surface of the second side plate 20 is called the hook edge 42. A triangular notch 44 is formed at the intersection of the rib edge 41 and the hypotenuse 43 of the base plate 40. The hypotenuse of the notch 44 coincides with the hypotenuse 43 of the base plate 40, and the vertex of the notch 44 coincides with the endpoint of the rib edge 41. The height of the notch 44 is greater than the thickness of the first side plate 10. The long side of the 4 coincides with the side 41; at the junction of the hook edge 42 and the hypotenuse 43 of the base plate 40, a triangular protrusion 45 is formed on the same plane as the base plate 40. The hypotenuse of the protrusion 45 coincides with the hypotenuse 43 of the base plate 40, the vertex of the protrusion 45 is the same as the endpoint of the hook edge 42, the height of the protrusion 45 is greater than the thickness of the second side plate 20, and the long side of the protrusion 45 coincides with the side 41, which effectively enhances the stability of the splicing of the base plate 40.

[0048] Further, please refer to Figure 8 An upper inclined locking edge 46 extends from the inclined side 43 of the base plate 40 near the notch 44, and a lower inclined locking edge 47 extends from the inclined side 43 of the base plate 40 near the locking protrusion 45 and is spliced ​​with the upper inclined locking edge 46.

[0049] Specifically, the upper inclined clamping edge 46 and the lower inclined clamping edge 47 are coplanar with the lower surface of the bottom plate 40 and the upper surface of the box, respectively, and are used to assist in the splicing and positioning of the side plate profile 200.

[0050] Since the lower hook portion 23 of the second side plate 20 prevents the first side plate 10 from sliding downward, a lower inclined locking edge portion 47 extends from the inclined edge 43 of the bottom plate 40 near the locking protrusion 45 to block the upward movement of the first side plate 10, thus achieving bidirectional locking. Similarly, since the upper hook portion 12 prevents the second side plate 20 from sliding upward, an upper inclined locking edge portion 46 extends from the inclined edge 43 of the bottom plate 40 near the notch 44 to block the downward sliding of the second side plate 20, thus achieving bidirectional locking.

[0051] Furthermore, the upper inclined edge portion 46 and the lower inclined edge portion 47 have the same length along the inclined side 43 of the base plate 40, and each occupies half the length of the inclined side 43 of the base plate 40, ensuring uniform force distribution during splicing.

[0052] In one embodiment, see Figure 8 The upper inclined edge 46 is an upper inclined edge that protrudes from the inclined side 43 of the base plate 40 and is coplanar with the outer surface of the base plate 40. The outer surface of the upper inclined edge is higher than the outer surface of the inclined side 43 of the base plate 40, and an inner step (not shown in the figure) is formed on the outer surface of the upper inclined edge and the base plate 40. The thickness of the inner step on the outer surface of the base plate 40 is the same as that of the lower inclined edge.

[0053] Furthermore, the lower inclined edge 47 is a lower inclined edge that protrudes from the inclined side 43 of the base plate 40 and is coplanar with the inner surface of the base plate 40. The inner surface of the lower inclined edge is higher than the inner surface of the inclined side 43 of the base plate 40, and an outer step (not shown in the figure) is formed on the lower inclined edge and the inner surface of the base plate 40. The thickness of the outer step on the inner surface of the base plate 40 is the same as that of the upper inclined edge.

[0054] 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 base plate 40 is the same as the thickness of the lower inclined locking edge 47, and the thickness of the outer step on the inner surface of the base plate 40 is the same as the thickness of the upper inclined locking edge 46, a tight engagement is achieved.

[0055] In one embodiment, the straight quadrangular prism packaging box 100 is formed by snap-fitting side interlocking structures 300. Specifically, two side panel profiles 200 are spliced ​​together by the side interlocking structures 300 to form four side panels, and the bottom plate 40 is connected to the bottom by the interlocking structure of the inclined side 43 to form a complete packaging box 100. The overall structure is stable and easy to disassemble and reuse.

[0056] 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 side-locking structure for a split-type packaging profile of a straight quadrangular prism packaging box, the straight quadrangular prism 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 sides; characterized in that, The side-locking structure includes an upper hook portion and a lower edge portion provided on the first free side of the first side plate, and an upper edge portion and a lower hook portion provided on the second free side of the second side plate. In this configuration, the two side panel profiles are spliced ​​together opposite each other, and the upper edge of one side panel profile can engage with the upper hook of the other side panel profile, while the lower hook engages with the lower edge, so that the two side panel profiles are spliced ​​together to form a right quadrangular prism-shaped packaging box side panel.

2. The side-engaging structure according to claim 1, characterized in that, The adjacent side is a fixed edge, the first side plate extends in the first direction of the fixed edge, and the second side plate extends in the second direction of the fixed edge. The lower side retaining edge is located in the lower half of the first free side, and the lower side retaining edge is a lower side retaining edge that protrudes along the first direction on the first free side. The upper hook portion is provided on the upper half of the first free side. The upper hook portion includes a first extension portion that protrudes along the first direction on the first free side and is coplanar with the first side plate, and a second extension portion that extends along the second direction at the end of the first extension portion, so as to form an L-shaped upper hook. The upper side retaining edge is located on the upper half of the second free side, and the upper side retaining edge is an upper side retaining edge that protrudes along the second direction on the second free side; the lower side retaining hook is located on the lower half of the second free side, and the lower side retaining hook includes a third extension that protrudes along the second direction on the second free side and is coplanar with the second side plate, and a fourth extension that extends along the first direction at the end of the third extension, so as to form an L-shaped lower side retaining hook.

3. The side-engaging structure according to claim 2, characterized in that, The outer surface of the lower side flange is lower than the outer surface of the first side plate, and a first step is formed between the lower side flange and the outer surface of the first side plate. The thickness of the first step in the direction perpendicular to the plane of the first side plate is the same as the thickness of the fourth extension in the second direction. The sum of the width of the first step in the direction along the plane of the first side plate and the thickness of the first side plate is the same as the length of the fourth extension in the first direction. The inner surface of the lower side edge is flush with the inner surface of the first side plate, and the extension length of the first extension along the first direction is the same as the thickness of the lower side edge in the direction perpendicular to the plane of the first side plate.

4. The side-engaging structure according to claim 3, characterized in that, The outer surface of the upper side flange is lower than the outer surface of the second side plate, and a second step is formed between the upper side flange and the outer surface of the second side plate. The thickness of the second step in the direction perpendicular to the plane of the second side plate is the same as the thickness of the second extension in the second direction. The sum of the width of the second step in the direction along the plane of the second side plate and the thickness of the second side plate is the same as the length of the second extension in the second direction. The inner surface of the upper side flange is flush with the inner surface of the second side plate. The extension length of the third extension in the first direction is the same as the thickness of the upper side flange in the direction perpendicular to the plane of the second side plate.

5. The side-engaging structure according to any one of claims 2-3, characterized in that, The lower edge portion and the upper hook portion each occupy half the length in the extension direction along the first free side of the first side plate.

6. The side-engaging structure according to claim 2, characterized in that, The side panel profile also includes a triangular base plate integrally formed with the first side panel and the second side panel, wherein the two right-angled sides of the base plate are integrally formed with the bottom edges of the first side panel and the second side panel, respectively.

7. The side-engaging structure according to claim 6, characterized in that, The edge of the base plate adjacent to the outer surface of the first side plate is called the "strap edge," and the edge adjacent to the outer surface of the second side plate is called the "hook edge." A triangular notch is formed at the junction of the strap edge and the hypotenuse of the base plate. The hypotenuse of the notch coincides with the hypotenuse of the base plate, the vertex of the notch coincides with the endpoint of the strap edge, the height of the notch is greater than the thickness of the first side plate, and the long side of the notch coincides with the strap edge. A triangular protrusion coplanar with the base plate is formed at the junction of the hook edge and the hypotenuse of the base plate. The hypotenuse of the protrusion coincides with the hypotenuse of the base plate, the vertex of the protrusion coincides with the endpoint of the hook edge, the height of the protrusion is greater than the thickness of the second side plate, and the long side of the protrusion coincides with the strap edge.

8. The side-engaging structure according to claim 7, characterized in that, An upper inclined locking edge, coplanar with the base plate, extends from the inclined side of the base plate near the notch, and a lower inclined locking edge, coplanar with the base plate, extends from the inclined side of the base plate near the locking protrusion; the upper and lower inclined locking edges have the same length along the inclined side of the base plate, and each occupies half the length of the inclined side of the base plate.

9. The side-engaging structure according to claim 8, characterized in that, The upper inclined flange is an upper inclined flange that protrudes from the inclined side of the base plate and is coplanar with the outer surface of the base plate. The outer surface of the upper inclined flange is higher than the outer surface of the inclined side of the base plate, and an inner step is formed on the outer surface of the upper inclined flange and the base plate. The thickness of the inner step on the outer surface of the base plate is the same as that of the lower inclined flange. The lower inclined flange is a lower inclined flange that protrudes from the inclined side of the base plate and is coplanar with the inner surface of the base plate. The inner surface of the lower inclined flange is higher than the inner surface of the inclined side of the base plate, and an outer step is formed on the inner surface of the lower inclined flange and the base plate. The thickness of the outer step on the inner surface of the base plate is the same as that of the upper inclined flange.

10. A straight quadrangular prism packaging box, characterized in that, The packaging box is formed by snap-fitting the side-locking structure as described in any one of claims 1 to 9.

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