Paper card packaging structure

Abstract

The utility model relates to packing technical field especially relates to a paper card packing structure, including by paperboard integral cutting forming's first bottom plate, second bottom plate, first backboard, second backboard, first side plate, second side plate, first vice plate, second vice plate, third vice plate and fourth vice plate, second bottom plate, first bottom plate, first backboard and second backboard are sequentially connected in the first direction, first side plate, first backboard and second side plate are sequentially connected in the second direction, second vice plate, first side plate and first vice plate are sequentially connected in the first direction, fourth vice plate, second side plate and third vice plate are sequentially connected in the first direction. Paper card packing structure adopts paperboard integral cutting forming and forms the buffer inner lining through folding, and paperboard material is more environmental protection and the development cycle is shorter, can effectively reduce product cost and satisfy market demand.

Description

Technical Field

[0001] This utility model belongs to the field of packaging technology, and in particular relates to a paper card packaging structure. Background Technology

[0002] For 3C products that are large in size and have a relatively regular shape, cushioning linings are usually required during packaging to prevent damage during transportation.

[0003] Currently, cushioning linings on the market typically use materials such as pearl cotton (EPE), polystyrene foam (EPS), and EVA foam, which are formed by injection molding or die-cutting and then adhesive bonding. This type of cushioning lining suffers from a long development cycle, resulting in high production costs; furthermore, the materials used are not environmentally friendly and do not meet market demands, thus limiting product sales.

[0004] Therefore, this utility model addresses the aforementioned technical problems by providing a paper card packaging structure that uses cardboard folding to form a cushioning liner. The cardboard material is more environmentally friendly and has a shorter development cycle, thus solving one or more of the aforementioned problems. Utility Model Content

[0005] To address the aforementioned problems in the existing technology, this utility model provides a paper card packaging structure, including a first base plate, a second base plate, a first back plate, a second back plate, a first side plate, a second side plate, a first auxiliary plate, a second auxiliary plate, a third auxiliary plate, and a fourth auxiliary plate, all integrally cut from cardboard.

[0006] The second base plate, the first base plate, the first back plate, and the second back plate are connected in sequence in the first direction; the first side plate, the first back plate, and the second side plate are connected in sequence in the second direction; the second sub-plate, the first side plate, and the first sub-plate are connected in sequence in the first direction; and the fourth sub-plate, the second side plate, and the third sub-plate are connected in sequence in the first direction.

[0007] The first back plate is folded perpendicularly to the first bottom plate. The first side plate and the second side plate are both folded perpendicularly to the first back plate. The second sub-plate and the fourth sub-plate are both folded overlapping with the first bottom plate. The second bottom plate is folded overlapping with the first bottom plate and snapped into the first back plate. The second bottom plate presses against the second sub-plate and the fourth sub-plate. The first sub-plate is folded overlapping with the first side plate and snapped into the second sub-plate. The third sub-plate is folded overlapping with the second side plate and snapped into the fourth sub-plate. The second back plate is folded overlapping with the first back plate and snapped into the first bottom plate.

[0008] Optionally, in some technical solutions, a first dividing groove and a second dividing groove are cut out at both ends of the first base plate, the first dividing groove separates the first base plate and the second sub-plate, and the second dividing groove separates the first base plate and the fourth sub-plate.

[0009] Optionally, in some technical solutions, a third dividing groove and a fourth dividing groove are cut out at both ends of the second back plate, the third dividing groove separating the second back plate and the first sub-plate, and the fourth dividing groove separating the second back plate and the third sub-plate.

[0010] Optionally, in some technical solutions, a symmetrical first slot is cut out on the side of the first base plate that is connected to the first back plate, and a symmetrical first protrusion is cut out on the outer side of the second back plate, wherein the first protrusion is adapted to engage with the first slot.

[0011] Optionally, in some technical solutions, a second slot is cut out on the side of the first back plate that is connected to the first base plate, and a second protrusion is cut out on the outer side of the second base plate, the second protrusion being adapted to engage with the second slot.

[0012] Optionally, in some technical solutions, a third slot is cut out on the side of the second sub-plate that connects to the first side plate, and a third protrusion is cut out on the outer side of the first sub-plate, wherein the third protrusion is adapted to engage with the third slot.

[0013] Optionally, in some technical solutions, a fourth slot is cut out on the side of the fourth sub-plate that connects to the second side plate, and a fourth protrusion is cut out on the outer side of the third sub-plate, the fourth protrusion being adapted to engage with the fourth slot.

[0014] Optionally, in some technical solutions, a first notch and a second notch are cut out at both ends of the first base plate, the first notch avoids the third slot, and the second notch avoids the fourth slot.

[0015] Optionally, in some technical solutions, a symmetrical third notch is cut out on the outer side of the second base plate, the third notch avoiding the first slot;

[0016] A fourth notch is cut out on the outer side of the second back plate, and the fourth notch avoids the second slot.

[0017] Optionally, in some technical solutions, the second sub-plate is cut with a fifth notch on one side of the first dividing groove, and the fifth notch avoids the first slot;

[0018] The fourth subplate is cut with a sixth notch on one side of the second dividing groove, and the sixth notch avoids the first slot.

[0019] The technical solution of this utility model has the following advantages or beneficial effects:

[0020] The paper card packaging structure provided by this utility model includes a first base plate, a second base plate, a first back plate, a second back plate, a first side plate, a second side plate, a first auxiliary plate, a second auxiliary plate, a third auxiliary plate, and a fourth auxiliary plate, all integrally cut from cardboard. The second base plate, the first base plate, the first back plate, and the second back plate are sequentially connected in a first direction; the first side plate, the first back plate, and the second side plate are sequentially connected in a second direction; the second auxiliary plate, the first side plate, and the first auxiliary plate are sequentially connected in a first direction; and the fourth auxiliary plate, the second side plate, and the third auxiliary plate are sequentially connected in a first direction. The first back plate is folded perpendicularly to the first base plate; the first side plate and the second side plate are both folded perpendicularly to the first back plate; the second auxiliary plate and the fourth auxiliary plate are both folded overlapping with the first base plate; the second base plate is folded overlapping with the first base plate and snapped into the first back plate; the second base plate presses down on the second auxiliary plate and the fourth auxiliary plate; the first auxiliary plate is folded overlapping with the first side plate and snapped into the second auxiliary plate; the third auxiliary plate is folded overlapping with the second side plate and snapped into the fourth auxiliary plate; and the second back plate is folded overlapping with the first back plate and snapped into the first base plate. The paper card packaging structure is made of cardboard cut into one piece and folded to form a cushioning liner. Cardboard material is more environmentally friendly and has a shorter development cycle, which can effectively reduce product costs and meet market demands. Attached Figure Description

[0021] Embodiments of the present invention will be described more fully with reference to the accompanying drawings. However, the accompanying drawings are for illustration and explanation only and do not constitute a limitation on the scope of the present invention.

[0022] Figure 1 This is a plan view of the double-layer inner lining paper card packaging structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the folding steps for the double-layer inner lining paper card packaging structure of this utility model;

[0024] Figure 3 This is a schematic diagram of another folding step in the double-layer inner lining paper card packaging structure of this utility model;

[0025] Figure 4 This is a plan view of the multi-layer inner lining paper card packaging structure of this utility model;

[0026] Figure 5 This is a schematic diagram of the folding steps of the multi-layer inner lining paper card packaging structure of this utility model;

[0027] Figure 6 This is a schematic diagram of another folding step in the multi-layer inner lining paper card packaging structure of this utility model;

[0028] Figure 7This is a schematic diagram of the forming process of the paper card packaging structure of this utility model;

[0029] Figure 8 This is a schematic diagram illustrating the packaging application of the paper card packaging structure of this utility model.

[0030] Illustration:

[0031] 1. First base plate; 2. Second base plate; 3. First back plate; 4. Second back plate; 5. First side plate;

[0032] 6. Second side panel; 7. First sub-panel; 8. Second sub-panel; 9. Third sub-panel; 10. Fourth sub-panel;

[0033] 11. First dividing groove; 12. Second dividing groove; 13. Third dividing groove; 14. Fourth dividing groove;

[0034] 15. First card slot; 16. First card protrusion; 17. Second card slot; 18. Second card protrusion; 19. Third card slot; 20. Third card protrusion; 21. Fourth card slot; 22. Fourth card protrusion; 23. First notch slot;

[0035] 24. Second notch; 25. Third notch; 26. Fourth notch; 27. Fifth notch;

[0036] 28. Sixth notch; 29. ​​Fifth sub-plate; 30. Sixth sub-plate; 31. Seventh sub-plate; 32. Eighth sub-plate; 33. Third back plate. Detailed Implementation

[0037] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many other different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0038] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0039] In the description of this utility model, unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0040] In the description of this utility model, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0041] like Figure 1-8 As shown, an embodiment of this utility model provides a paper card packaging structure that can be used for corner and edge protection of products to be packaged. It includes a first base plate 1, a second base plate 2, a first back plate 3, a second back plate 4, a first side plate 5, a second side plate 6, a first auxiliary plate 7, a second auxiliary plate 8, a third auxiliary plate 9, and a fourth auxiliary plate 10, all integrally cut from cardboard. The second base plate 2, the first base plate 1, the first back plate 3, and the second back plate 4 are sequentially connected in a first direction; the first side plate 5, the first back plate 3, and the second side plate 6 are sequentially connected in a second direction; the second auxiliary plate 8, the first side plate 5, and the first auxiliary plate 7 are sequentially connected in a first direction; and the fourth auxiliary plate 10... 0. The second side panel 6 and the third sub-panel 9 are connected sequentially in the first direction; the first back panel 3 is folded perpendicularly to the first bottom panel 1; the first side panel 5 and the second side panel 6 are both folded perpendicularly to the first back panel 3; the second sub-panel 8 and the fourth sub-panel 10 are both folded overlapping with the first bottom panel 1; the second bottom panel 2 is folded overlapping with the first bottom panel 1 and snapped into the first back panel 3; the second bottom panel 2 presses down on the second sub-panel 8 and the fourth sub-panel 10; the first sub-panel 7 is folded overlapping with the first side panel 5 and snapped into the second sub-panel 8; the third sub-panel 9 is folded overlapping with the second side panel 6 and snapped into the fourth sub-panel 10; the second back panel 4 is folded overlapping with the first back panel 3 and snapped into the first bottom panel 1. The paper card packaging structure uses cardboard cut and formed in one piece and folded to form a cushioning liner. Cardboard material is more environmentally friendly and has a shorter development cycle, which can effectively reduce product costs and meet market demands, improving the product's sales competitiveness and economic benefits.

[0042] Specifically, in this embodiment, such as Figure 1-3As shown, the cardboard to be cut is preferably corrugated paper. Double-layer or triple-layer corrugated paper can be used for overall cutting, and fold lines are pressed out according to the folding steps. During cutting and forming, the second base plate 2, the first base plate 1, the first back plate 3, and the second back plate 4 are connected sequentially in the first direction, wherein the first direction is vertical, with the second base plate 2 at the bottom and the second back plate 4 at the top. The second base plate 2, the first base plate 1, the first back plate 3, and the second back plate 4 are connected sequentially from bottom to top and have fold lines. During cutting and forming, the first side plate 5, the first back plate 3, and the second side plate 6 are connected sequentially in the second direction, wherein the second direction is horizontal, with the first side plate 5 on the left and the second side plate 6 on the right. The first side plate 5, the first back plate 3, and the second side plate 6 are connected sequentially from left to right and have fold lines. During cutting and forming, the second sub-plate 8, the first side plate 5, and the first sub-plate 7 are connected sequentially in the first direction, with the lower sub-plate at the bottom and the first sub-plate 7 at the top. The second sub-plate 8, the first side plate 5, and the first sub-plate 7 are connected sequentially from bottom to top and have fold lines. During cutting and forming, the fourth sub-plate 10, the second side plate 6, and the third sub-plate 9 are connected sequentially in the first direction, with the fourth sub-plate 10 at the bottom and the third sub-plate 9 at the top. The fourth sub-plate 10, the second side plate 6, and the third sub-plate 9 are connected sequentially from bottom to top and have fold lines. During folding and forming, the first back plate 3 is first folded perpendicularly to the first bottom plate 1, and the first side plate 5 and the second side plate 6 are both folded perpendicularly to the first back plate 3. Then, the second sub-plate 8 and the fourth sub-plate 10 are both overlapped and folded to the first bottom plate 1, and the second bottom plate 2 is overlapped and folded to the first bottom plate 1 and engaged with the first back plate 3, so that the second bottom plate 2 can press the second sub-plate 8 and the fourth sub-plate 10 and maintain stability. Finally, the first sub-plate 7 is overlapped and folded with the first side plate 5 and then snapped into the second sub-plate 8 to stabilize the first side plate 5 and the first sub-plate 7; the third sub-plate 9 is overlapped and folded with the second side plate 6 and then snapped into the fourth sub-plate 10 to stabilize the second side plate 6 and the third sub-plate 9; the second back plate 4 is overlapped and folded with the first back plate 3 and then snapped into the first bottom plate 1 to stabilize the first back plate 3 and the second back plate 4.

[0043] Furthermore, in this embodiment, a first dividing groove 11 and a second dividing groove 12 are respectively cut out at both ends of the first base plate 1. The first dividing groove 11 separates the first base plate 1 and the second sub-plate 8, and the second dividing groove 12 separates the first base plate 1 and the fourth sub-plate 10. Specifically, the first dividing groove 11 is cut between the first base plate 1 and the second sub-plate 8, and the second dividing groove 12 is cut between the first base plate 1 and the fourth sub-plate 10, so that both the second sub-plate 8 and the fourth sub-plate 10 can be folded toward the plane of the first base plate 1, thereby achieving the overlapping folding of both the second sub-plate 8 and the fourth sub-plate 10 toward the first base plate 1.

[0044] Furthermore, in this embodiment, a third dividing groove 13 and a fourth dividing groove 14 are respectively cut out at both ends of the second back plate 4. The third dividing groove 13 separates the second back plate 4 and the first sub-plate 7, and the fourth dividing groove 14 separates the second back plate 4 and the third sub-plate 9. Specifically, the third dividing groove 13 is cut out between the second back plate 4 and the first sub-plate 7, and the fourth dividing groove 14 is cut out between the second back plate 4 and the third sub-plate 9, so that the first sub-plate 7 and the third sub-plate 9 can be folded and snapped onto the planes of the first side plate 5 and the second side plate 6, respectively, thereby achieving the overlapping folding of the first sub-plate 7 and the third sub-plate 9 onto the first side plate 5 and the second side plate 6, respectively.

[0045] Furthermore, in this embodiment, symmetrical first slots 15 are cut out on one side of the first base plate 1 that connects to the first back plate 3, and symmetrical first protrusions 16 are cut out on the outer side of the second back plate 4. The first protrusions 16 are adapted to engage with the first slots 15. Specifically, two symmetrical first slots 15 are cut out on the upper side of the first base plate 1, and two symmetrical first protrusions 16 are cut out on the upper side of the second back plate 4. The first slots 15 and the first protrusions 16 are adapted to engage with each other. When the second back plate 4 overlaps and is folded with the first back plate 3, the first protrusions 16 engage with the first slots 15 to stabilize the second back plate 4. The side of the second back plate 4 can also press the second base plate 2, making the inner lining formed by the paper card packaging structure more stable. Forming and separation are more convenient and quick, and the inner lining can be reused, making it more environmentally friendly and economical.

[0046] Furthermore, in this embodiment, a second slot 17 is cut out on the side of the first back plate 3 that connects to the first base plate 1, and a second protrusion 18 is cut out on the outer side of the second base plate 2. The second protrusion 18 is adapted to engage with the second slot 17. Specifically, a second slot 17 is cut out on the lower side of the first back plate 3, and a second protrusion 18 is cut out on the outer side of the second base plate 2. The second slot 17 and the second protrusion 18 are adapted to engage. When the second base plate 2 overlaps and is folded with the first base plate 1, the second protrusion 18 engages in the second slot 17, thereby stabilizing the second base plate 2. The second base plate 2 simultaneously presses against the second sub-plate 8 and the fourth sub-plate 10, and the second base plate 2 is also pressed against the second back plate 4, making the inner lining formed by the paper card packaging structure more stable. Forming and separation are more convenient and quick, and the inner lining can be reused, making it more environmentally friendly and economical.

[0047] Further, in this embodiment, a third slot 19 is cut out on the side of the second sub-plate 8 that connects to the first side plate 5, and a third protrusion 20 is cut out on the outer side of the first sub-plate 7. The third protrusion 20 is adapted to engage with the third slot 19. A fourth slot 21 is cut out on the side of the fourth sub-plate 10 that connects to the second side plate 6, and a fourth protrusion 22 is cut out on the outer side of the third sub-plate 9. The fourth protrusion 22 is adapted to engage with the fourth slot 21. Specifically, a third slot 19 is cut out on the upper side of the second sub-plate 8, a third protrusion 20 is cut out on the upper side of the first sub-plate 7, a fourth slot 21 is cut out on the upper side of the fourth sub-plate 10, and a fourth protrusion 22 is cut out on the upper side of the third sub-plate 9. The third slot 19 is adapted to engage with the third protrusion 20, and the fourth slot 21 is adapted to engage with the fourth protrusion 22. When the first sub-plate 7 is overlapped and folded with the first side plate 5, the third latching protrusion 20 engages in the third latching groove 19 to stabilize the first sub-plate 7; when the third sub-plate 9 is overlapped and folded with the second side plate 6, the fourth latching protrusion 22 engages in the fourth latching groove 21 to stabilize the third sub-plate 9. This makes the inner lining formed by the paper card packaging structure more stable, and the forming and separation are more convenient and quick. In addition, the inner lining can be reused, which is more environmentally friendly and economical.

[0048] Further, in this embodiment, a first notch 23 and a second notch 24 are cut out at both ends of the first base plate 1, respectively. The first notch 23 avoids the third slot 19, and the second notch 24 avoids the fourth slot 21. A symmetrical third notch 25 is cut out on the outer side of the second base plate 2, avoiding the first slot 15; a fourth notch 26 is cut out on the outer side of the second back plate 4, avoiding the second slot 17. Specifically, the first notch 23 and the second notch 24 are cut out at both ends of the first base plate 1, respectively. The first notch 23 avoids the third slot 19, and the second notch 24 avoids the fourth slot 21, so that the third protrusion 20 and the fourth protrusion 22 can be smoothly inserted into the third slot 19 and the fourth slot 21, respectively, and the third protrusion 20 and the fourth protrusion 22 can reach or pass through the first base plate 1. A symmetrical third notch 25 is cut out on the lower side of the second base plate 2, which avoids the first card slot 15; a fourth notch 26 is cut out on the upper side of the second back plate 4, which avoids the second card slot 17, so that the first card protrusion 16 and the second card protrusion 18 can be smoothly inserted into the first card slot 15 and the second card slot 17 respectively, and the first card protrusion 16 can pass through the first base plate 1, and the second card protrusion 18 can pass through the first back plate 3, which improves the overall stability of the inner lining of the paper card packaging structure.

[0049] Furthermore, in this embodiment, the second sub-plate 8 is cut with a fifth notch 27 on one side of the first dividing groove 11, the fifth notch 27 avoiding the first card slot 15; the fourth sub-plate 10 is cut with a sixth notch 28 on one side of the second dividing groove 12, the sixth notch 28 avoiding the first card slot 15. Specifically, the fifth notch 27 is cut on the right side of the second sub-plate 8, avoiding the first card slot 15; the sixth notch 28 is cut on the left side of the fourth sub-plate 10, avoiding the first card slot 15, so that the symmetrical first card protrusion 16 can be smoothly inserted into the first card slot 15, and the first card protrusion 16 can pass through the first bottom plate 1, improving the overall stability of the paper card packaging structure lining.

[0050] Furthermore, in another embodiment, such as Figure 4-6 As shown, in order to increase the hardness and thickness of the inner lining layer, the paper card packaging structure can also be equipped with a fifth sub-plate 29, a sixth sub-plate 30, a seventh sub-plate 31, an eighth sub-plate 32 and a third back plate 33. The third back plate 33 is located above the second back plate 4 and connected to the second back plate 4. The fifth sub-plate 29 is located above the first sub-plate 7 and connected to the first sub-plate 7. The sixth sub-plate 30 is located below the second sub-plate 8 and connected to the second sub-plate 8. The seventh sub-plate 31 is located above the third sub-plate 9 and connected to the third sub-plate 9. The eighth sub-plate 32 is located below the fourth sub-plate 10 and connected to the fourth sub-plate 10. During folding, the third back panel 33 is first overlapped with the second back panel 4, the fifth sub-panel 29 is overlapped with the first sub-panel 7, the sixth sub-panel 30 is overlapped with the second sub-panel 8, the seventh sub-panel 31 is overlapped with the third sub-panel 9, and the eighth sub-panel 32 is overlapped with the fourth sub-panel 10. Then, the first back panel 3 is folded perpendicularly to the first bottom panel 1, and the first side panel 5 and the second side panel 6 are both folded perpendicularly to the first back panel 3. This folding process continues until a lining with greater rigidity and thickness is formed, adaptable to more application scenarios. It should be noted that in some embodiments, the strength and thickness of the paperboard packaging structure lining can be specifically designed according to the cushioning requirements of the packaged product. For example, the number of bottom panels, back panels, and / or sub-panels can be increased, or paperboard of different strengths or thicknesses can be used to cut the paperboard packaging structure.

[0051] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0052] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A paper card packaging structure, characterized in that, It includes a first base plate, a second base plate, a first back plate, a second back plate, a first side plate, a second side plate, a first sub-plate, a second sub-plate, a third sub-plate, and a fourth sub-plate, all integrally cut from cardboard. The second base plate, the first base plate, the first back plate, and the second back plate are connected in sequence in the first direction; the first side plate, the first back plate, and the second side plate are connected in sequence in the second direction; the second sub-plate, the first side plate, and the first sub-plate are connected in sequence in the first direction; and the fourth sub-plate, the second side plate, and the third sub-plate are connected in sequence in the first direction. The first back plate is folded perpendicularly to the first bottom plate. The first side plate and the second side plate are both folded perpendicularly to the first back plate. The second sub-plate and the fourth sub-plate are both folded overlapping with the first bottom plate. The second bottom plate is folded overlapping with the first bottom plate and snapped into the first back plate. The second bottom plate presses against the second sub-plate and the fourth sub-plate. The first sub-plate is folded overlapping with the first side plate and snapped into the second sub-plate. The third sub-plate is folded overlapping with the second side plate and snapped into the fourth sub-plate. The second back plate is folded overlapping with the first back plate and snapped into the first bottom plate.

2. The paper card packaging structure as described in claim 1, characterized in that, The first base plate has a first dividing groove and a second dividing groove cut out at both ends. The first dividing groove separates the first base plate and the second sub-plate, and the second dividing groove separates the first base plate and the fourth sub-plate.

3. The paper card packaging structure as described in claim 2, characterized in that, The second back plate has a third dividing groove and a fourth dividing groove cut out at both ends. The third dividing groove separates the second back plate from the first sub-plate, and the fourth dividing groove separates the second back plate from the third sub-plate.

4. The paper card packaging structure as described in claim 3, characterized in that, A symmetrical first slot is cut out on one side of the first base plate that connects to the first back plate, and a symmetrical first protrusion is cut out on the outer side of the second back plate. The first protrusion is adapted to engage with the first slot.

5. The paper card packaging structure as described in claim 4, characterized in that, A second slot is cut out on one side of the first back plate that connects to the first base plate, and a second protrusion is cut out on the outer side of the second base plate. The second protrusion is adapted to engage with the second slot.

6. The paper card packaging structure as described in claim 5, characterized in that, A third slot is cut out on the side of the second sub-plate that connects to the first side plate, and a third protrusion is cut out on the outer side of the first sub-plate. The third protrusion is adapted to engage with the third slot.

7. The paper card packaging structure as described in claim 6, characterized in that, A fourth slot is cut out on the side of the fourth sub-plate that connects to the second side plate, and a fourth protrusion is cut out on the outer side of the third sub-plate. The fourth protrusion is adapted to engage with the fourth slot.

8. The paper card packaging structure as described in claim 7, characterized in that, The first base plate has a first notch and a second notch cut out at both ends, the first notch avoids the third slot, and the second notch avoids the fourth slot.

9. The paper card packaging structure as described in claim 8, characterized in that, A symmetrical third notch is cut out on the outer side of the second base plate, and the third notch avoids the first slot; A fourth notch is cut out on the outer side of the second back plate, and the fourth notch avoids the second slot.

10. The paper card packaging structure as described in claim 9, characterized in that, The second sub-plate is cut with a fifth notch on one side of the first dividing groove, and the fifth notch avoids the first slot; The fourth subplate is cut with a sixth notch on one side of the second dividing groove, and the sixth notch avoids the first slot.

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