Carton box

Abstract

The utility model belongs to the technical field of paper products, and particularly relates to a carton. Comprising an outer box which is of a box-shaped structure with an open upper portion and comprises outer maintaining plates which are arranged on the two sides and used for maintaining the shape of a wall body, the outer maintaining plates are connected through foldable outer folding plates, and containing bodies forming containing spaces are arranged at the bottoms of the outer maintaining plates and the bottoms of the outer folding plates; the inner box is of a box-shaped structure with the upper portion opened, the inner box can be attached to the inner wall of the outer box to form a double-layer structure after being unfolded, and the inner box can be contained in the containing space of the containing body after being folded; the upper cover covers the top of the outer box, and the upper cover comprises a horizontal upper plate and a vertical side plate extending downwards. By designing the foldable outer box and the foldable inner box, the inner box is attached to the outer box after being unfolded to form a double-layer reinforced package, the inner box is stored in the containing body at the bottom of the outer box after being folded, and the inner box can be independently taken out for use.

Description

Technical Field

[0001] This utility model belongs to the field of paper products technology, and specifically refers to a cardboard box. Background Technology

[0002] Cardboard boxes, as a core carrier for logistics, warehousing, and product packaging, are widely used in scenarios such as cargo transportation, storage, and display. With the rapid development of e-commerce logistics and supply chain management, higher demands are being placed on the convenience, space utilization, and functional flexibility of cardboard boxes: they not only need to meet the differentiated requirements of packaging strength for different goods, but also need to minimize volume when folded and stored to reduce transportation costs, while also taking into account the ease of operation for users when assembling, disassembling, and using them individually.

[0003] However, existing cardboard boxes generally suffer from the following problems: First, traditional folding cardboard boxes are mostly single-layer structures. Although they can be folded, they still require additional space for storage after folding, and additional reinforcement is needed to enhance strength after unfolding, making the operation cumbersome. Second, multi-layered cardboard boxes often use a fixed connection method, and the inner and outer boxes cannot be separated. This prevents flexible selection of single or double-layer packaging according to the size of the goods, and also makes it impossible to use the inner box alone, resulting in limited functionality. Third, the bonding stability between the inner and outer boxes of some double-layered cardboard boxes is insufficient, and the inner box is prone to detachment due to vibration during transportation, affecting packaging reliability. Fourth, existing folding structures mostly rely on complex buckles or glue for fixation. The unreasonable design of the folding lines leads to high folding resistance and low efficiency, and they are easily damaged after repeated folding, making it difficult to meet the needs of high-frequency use. Therefore, there is an urgent need for a cardboard box structure that can achieve rapid folding and storage, and can also improve packaging strength and functional versatility through flexible combination of inner boxes. Utility Model Content

[0004] This utility model designs a foldable outer box and inner box, so that the inner box can be unfolded and fitted with the outer box to form a double-layer reinforced packaging, and can be folded and stored in the bottom of the outer box. The inner box can also be taken out and used separately, thus alleviating the problems mentioned in the background art.

[0005] The purpose of this utility model is achieved as follows: a cardboard box, comprising:

[0006] The outer box is a box-shaped structure with an open top, including two outer support plates on both sides to maintain the shape of the wall. The outer support plates are connected by foldable outer folding plates. The bottom of the outer support plates and the outer folding plates is provided with a receiving body to form a receiving space.

[0007] The inner box is a box-shaped structure with an open top. When unfolded, the inner box can fit against the inner wall of the outer box to form a double-layer structure. When folded, the inner box can be placed in the storage space of the container.

[0008] The top cover covers the top of the outer casing and includes a horizontal top plate and downwardly extending vertical side plates.

[0009] The present invention is further configured such that the outer folding panel of the outer box includes a side folding part, an upper folding part and a lower folding part that are foldably connected to each other by a folding line, and the folding line is used to guide the folding direction of the outer folding panel so that the outer box is folded.

[0010] The present invention is further configured such that the inner box includes inner support plates on both sides corresponding to the outer folding plates, the inner support plates are connected by foldable inner folding plates, and the inner folding plates on both sides are folded inward by a vertical folding line in the middle, so that the inner box is folded.

[0011] The present invention is further configured such that a handle is provided at the top center of the inner support plate, and the bottom of the handle is foldably connected to the inner support plate via a folding line.

[0012] The present invention is further configured such that the outer folding plate and the handle plate are provided with corresponding handle holes.

[0013] The present invention is further configured such that a gap is formed between the two outer support plates in the folded state to observe whether the inner box is placed.

[0014] The present invention is further configured such that, after the inner box is unfolded, it forms an interference fit with the inner wall of the outer box.

[0015] The present invention is further provided that the inner box and the outer box have anti-slip texture on their respective wall surfaces.

[0016] By adopting the above technical solution, the beneficial effects that this utility model can achieve are:

[0017] 1. The inner box can be selectively inserted into the outer box to form a double-layer structure or removed for separate use. When the inner box and the outer box are attached, the double-layer walls work together to enhance the overall pressure and impact resistance, meeting the needs of heavy cargo transportation. When the inner box is used alone, it can be used as an independent small and medium-sized carton to adapt to small package packaging, realizing "one box for two purposes" and improving functional flexibility.

[0018] 2. The outer box uses a foldable outer folding panel and the inner box folds inward through a vertical folding line in the middle, so that both are flat after folding. The inner box can be precisely placed into the bottom compartment of the outer box, reducing the overall storage volume and significantly improving the utilization rate of transportation and storage space.

[0019] 3. The outer support plate and inner folding plate are equipped with corresponding hand holes, handle plates and handle holes. With the pre-indentation guide design of the folding line, users can quickly unfold or fold the outer box and take out and put in the inner box with one hand. Assembly can be completed without tools, reducing the intensity of operation and adapting to the high-frequency use needs of logistics scenarios. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention when unfolded;

[0021] Figure 2 This is an exploded view of this utility model;

[0022] Figure 3 This is a folding diagram of the inner box of this utility model;

[0023] Figure 4 This is a schematic diagram of the inner box of this utility model placed inside the outer box;

[0024] Figure 5 This is a three-dimensional structural diagram of the present invention when folded.

[0025] The reference numerals in the diagram are as follows: 1. Outer box; 10. Outer support plate; 11. Outer folding plate; 110. Side folding part; 111. Upper folding part; 112. Lower folding part; 113. Folding line; 12. Container; 2. Inner box; 20. Inner support plate; 21. Inner folding plate; 3. Top cover; 30. Horizontal top plate; 31. Vertical side plate; 4. Handle plate; 5. Handle hole. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. See also: Figure 1-5 :

[0027] Example 1:

[0028] This embodiment provides a cardboard box, including:

[0029] The outer box 1 is a box-shaped structure with an open top, including two outer support plates 10 on both sides for maintaining the shape of the wall. The outer support plates 10 are connected by foldable outer folding plates 11. The bottom of the outer support plates 10 and the outer folding plates 11 is provided with a receiving body 12 to form a receiving space.

[0030] The inner box 2 is a box-shaped structure with an open top. When the inner box 2 is unfolded, it can fit against the inner wall of the outer box 1 to form a double-layer structure. When the inner box 2 is folded, it can be placed in the storage space of the container 12.

[0031] The top cover 3 covers the top of the outer box 1, and the top cover 3 includes a horizontal upper plate 30 and a downwardly extending vertical side plate 31.

[0032] The outer box 1 serves as the external frame of the carton, providing overall support and protection. It resists external collisions and compression during transportation and storage, while also housing the inner box 2 and working together with the inner box 2 to enhance the overall structural strength.

[0033] The outer support plate 10 is used to maintain the shape of the outer casing 1 wall, ensuring that the outer casing 1 will not easily deform due to external forces during use, and providing lateral support for the outer casing 1. Simultaneously, the outer support plate 10 works in conjunction with the outer folding plate 11 to form the side structure of the outer casing 1, playing a positioning and guiding role when folding and unfolding the outer casing 1. The outer support plate 10 is generally a rectangular or nearly rectangular plate structure. The outer support plate 10 is located on both sides of the outer casing 1, connected to the outer folding plate 11, and perpendicular to the bottom housing 12 of the outer casing 1. The outer support plates 10 are connected to each other via the outer folding plate 11, with the connection point being a folding line 113, allowing for relative rotation.

[0034] The outer folding panel 11 is used to realize the folding function of the outer box 1. By folding different parts, the outer box 1 can switch between two states: unfolded for use and folded for storage, thereby reducing storage space.

[0035] The container 12 forms a receiving space for placing the folded inner box 2, and also provides bottom support for the inner box 2 and the outer box 1 during use. The container 12 is typically a rectangular or square closed structure with wall panels extending upwards around it, connecting to the bottom of the outer support plate 10 and the outer folding plate 11, forming the receiving space inside. The container 12 is tightly connected to the bottom of the outer support plate 10 and the outer folding plate 11, and is generally manufactured in a one-piece molding manner.

[0036] The inner box 2, together with the outer box 1, forms a double-layer structure to enhance packaging strength. It can also be removed separately and used as an independent cardboard box, providing additional packaging options. The inner box 2 is generally a cuboid or similar shape with an open top, which fits the internal shape of the outer box 1 for easy fitting.

[0037] The inner support plate 20 is used to maintain the shape of the inner box 2 wall, ensuring that the inner box 2 maintains a stable shape during use. It corresponds to the outer support plate 10 and together enhances the stability of the overall structure. The inner support plate 20 is generally a rectangular or nearly rectangular plate structure, located on both sides of the inner box 2. The inner support plates 20 are connected by inner folding plates 21, and the connection is a folding line 113, which allows for relative rotation.

[0038] The inner folding panel 21 is used to realize the folding function of the inner box 2, allowing the inner box 2 to switch between the use and storage states for easy storage and transportation. The inner folding panel 21 is generally a rectangular plate structure, which is a foldable panel connecting the inner support plates 20 on both sides, and generally has a vertical folding line 113 in the middle. Folding inward along the vertical folding line 113 in the middle simultaneously drives the inner support plates 20 on both sides to fold inward, thereby realizing the folding action of the inner box 2, and finally making the inner box 2 flat.

[0039] The top cover 3 covers the top of the outer carton 1, serving to seal, prevent dust and moisture, and also enhance the overall structural strength of the carton to a certain extent. The top cover 3 consists of a horizontal top plate 30 and downwardly extending vertical side plates 31. The horizontal top plate 30 covers the top opening of the outer carton 1, and the vertical side plates 31 contact the sides of the outer carton 1. The top cover 3 is installed by fitting the vertical side plates 31 to the top edge of the outer carton 1, possibly using snap-fit ​​or adhesive methods to ensure a tight connection. When the outer carton 1 and inner carton 2 are unfolded, the top cover 3 prevents external substances from entering; when folded, it prevents the outer carton 1 and inner carton 2 from unfolding.

[0040] When it is necessary to store the cardboard box, first fold the inner folding panels 21 on both sides of the inner box 2 inward along the vertical folding line 113 in the middle, so that the inner box 2 is folded. Then, place the folded inner box 2 into the receiving body 12 at the bottom of the outer box 1. Next, fold the outer folding panels 11 of the outer box 1 through the folding lines 113 of the side folding part 110, the upper folding part 111 and the lower folding part 112. The outer retaining panels 10 on both sides then move towards the middle, finally making the outer box 1 folded, which greatly reduces the overall space occupied.

[0041] In use, first unfold the outer box 1. The outer folding plate 11 unfolds the outer box 1 to restore its box-like structure, while the outer retaining plate 10 maintains the stability of the wall shape. Then, remove the inner box 2 from the bottom housing 12 of the outer box 1 and unfold it. Insert the inner box 2 into the outer box 1, ensuring a tight fit between the inner box 2 and the inner wall of the outer box 1, forming a double-layer structure that enhances overall strength and stability. Finally, place the items into the inner box 2 or the space formed by the inner and outer boxes 1, and then close the top cover 3 to complete the packaging.

[0042] If only inner box 2 is needed, it can be directly removed from outer box 1 and unfolded for use as a separate cardboard box.

[0043] Example 2:

[0044] This embodiment provides a cardboard box that, in addition to the technical solutions described in the above embodiments, also has the following technical features.

[0045] The outer folding plate 11 of the outer box 1 includes a side folding part 110, an upper folding part 111 and a lower folding part 112 that are foldably connected to each other by a folding line 113. The folding line 113 is used to guide the folding direction of the outer folding plate 11 so that the outer box 1 is folded.

[0046] The outer folding panel 11 of the outer box 1 is designed as a structure comprising a side folding section 110, an upper folding section 111, and a lower folding section 112, which are interconnected by folding lines 113. This design aims to achieve efficient folding and storage of the outer box 1. The side folding section 110, upper folding section 111, and lower folding section 112 work together, and guided by the folding lines 113, each part can fold in an orderly manner. This design allows the outer box 1 to quickly transform from an unfolded, fully-fledged box form into a compact folded state when not in use, greatly reducing the space occupied by the outer box 1 and facilitating storage and transportation. Simultaneously, this folding design ensures the structural integrity and stability of the outer box 1 during folding and unfolding, ensuring that the outer box 1 can be reused multiple times and meeting the needs of cardboard box storage and use in different scenarios.

[0047] Example 3:

[0048] This embodiment provides a cardboard box that, in addition to the technical solutions described in the above embodiments, also has the following technical features.

[0049] The inner box 2 includes inner support plates 20 on both sides corresponding to the outer folding plates 11. The inner support plates 20 are connected by foldable inner folding plates 21. Both inner folding plates 21 are folded inward through a vertical folding line 113 in the middle, so that the inner box 2 is folded.

[0050] The inner box 2 is designed with inner retaining plates 20 on both sides corresponding to the outer folding plates 11, and connected by foldable inner folding plates 21. Both inner folding plates 21 can be folded inward along the vertical folding line 113 in the middle. This design has the following main purposes: First, the inner retaining plates 20 can maintain the shape of the inner box 2 wall, so that it has a stable structure when used with the outer box 1 or when used alone, ensuring the inner box 2's function of containing and protecting items. Second, the design of the inner folding plates 21 and their folding line 113 allows the inner box 2 to flexibly switch between unfolded use and folded storage. When storage is required, the inner folding plates 21 are folded along the vertical folding line 113, and the inner box 2 is folded, making it easy to place inside the bottom housing 12 of the outer box 1, reducing the overall space occupied and improving space utilization. When in use, the unfolded inner box 2 can fit with the outer box 1 to form a double-layer structure to enhance strength, or be used alone to meet different packaging scenarios, greatly improving the flexibility and convenience of using the inner box 2.

[0051] Example 4:

[0052] This embodiment provides a cardboard box that, in addition to the technical solutions described in the above embodiments, also has the following technical features.

[0053] The inner support plate 20 has a handle plate 4 at the top center, and the bottom of the handle plate 4 is foldably connected to the inner support plate 20 via a folding line 113.

[0054] A foldable handle plate 4, connected to the inner support plate 20 via a folding line 113, is provided at the top center of the inner support plate 20. This design primarily aims to enhance the ease of use of the carton. When the inner carton 2 is used alone, the user can pull up the handle plate 4 along the folding line 113 to form a grippy handle structure, facilitating the handling of the inner carton 2 and its contents, reducing the burden of handling, especially suitable for scenarios where small items need to be frequently moved after packaging. When the handle is not in use, the handle plate 4 can be folded back into the inner support plate 20 along the folding line 113, avoiding space occupation and collision risks caused by the protruding handle. This ensures that the inner carton 2 maintains a neat shape when stored or used in conjunction with the outer carton 1, without hindering overall stacking and transportation. Simultaneously, this foldable design also protects the handle to some extent, preventing damage when not in use, extending the handle's lifespan, and improving the user experience.

[0055] Example 5:

[0056] This embodiment provides a cardboard box that, in addition to the technical solutions described in the above embodiments, also has the following technical features.

[0057] The outer folding plate 11 and the handle plate 4 are provided with corresponding handle holes 5.

[0058] The outer folding plate 11 and the handle plate 4 are equipped with corresponding handle holes 5, which are designed to further optimize the handling convenience and user experience of the carton. When the inner box 2 is placed inside the outer box 1, the operator's hands can pass through the handle holes 5 on the outer folding plate 11, while their fingers can grip the handle holes 5 on the inner box 2's handle plate 4. This allows both hands to stably grip the inner and outer boxes 1, greatly improving the stability of the carton during handling, preventing the inner and outer boxes 1 from sliding relative to each other, and reducing the risk of damage to the items. When the inner box 2 needs to be carried separately, it can be easily lifted through the handle holes 5 on the handle plate 4, without interference from the corresponding handle holes 5 on the outer folding plate 11. In addition, the corresponding handle holes 5 also make the inner and outer boxes 1 more visually integrated. When folded and stored, the design of the handle holes 5 will not affect the compact stacking of the carton, thus balancing aesthetics and practicality.

[0059] Example 6:

[0060] This embodiment provides a cardboard box that, in addition to the technical solutions described in the above embodiments, also has the following technical features.

[0061] A gap is formed between the two outer support plates 10 in the folded state to observe whether the inner box 2 is placed.

[0062] The two outer retaining plates 10 form a gap when folded, primarily to provide users with a direct observation window to quickly determine whether the inner box 2 has been correctly stored in the bottom housing 12 of the outer box 1. When folding and storing the carton, there is no need to open the outer box 1 or flip it over to check; this gap allows confirmation that the inner box 2 is properly placed, avoiding wasted space or a loose structure after folding due to improper storage of the inner box 2. Simultaneously, this design also facilitates a quick check of the carton's storage status before transportation or handling, improving packaging and logistics efficiency, reducing issues such as the inner box 2 falling or being lost due to negligence, and ensuring the accuracy and reliability of the storage process.

[0063] Example 7:

[0064] This embodiment provides a cardboard box that, in addition to the technical solutions described in the above embodiments, also has the following technical features.

[0065] When the inner box 2 is unfolded, it forms an interference fit with the inner wall of the outer box 1.

[0066] When the inner box 2 is unfolded, it forms an interference fit with the inner wall of the outer box 1. This tight physical fit significantly improves the overall stability and reliability of the carton structure. This fit ensures a close fit between the inner box 2 and the outer box 1 after assembly, effectively eliminating internal gaps and preventing the inner box 2 from shaking, shifting, or even detaching from the outer box 1 during transportation due to vibration, collisions, or other external forces. Simultaneously, the compression effect of the interference fit enhances the carton's compression resistance, allowing the double-layered inner and outer boxes 1 to share external pressure. Compared to single-layered cartons or simple packaging structures, this provides better protection for the contents, reducing the risk of damage due to loose packaging during transport and offering more reliable packaging protection for logistics and warehousing.

[0067] Example 8:

[0068] This embodiment provides a cardboard box that, in addition to the technical solutions described in the above embodiments, also has the following technical features.

[0069] The inner box 2 and the outer box 1 have anti-slip textures on their walls.

[0070] The inner box 2 and the outer box 1 have anti-slip textured surfaces that adhere to each other. The core purpose of this is to enhance the stability of the connection between the inner box 2 and the outer box 1. By increasing the roughness of the surface, the anti-slip texture effectively increases the friction between the inner box 2 and the outer box 1 when they are attached. Even if shaking, bumping, or being subjected to external pressure or collision during handling, the inner box 2 is less likely to slide or shift relative to the outer box 1, thus ensuring the stability of the double-layer structure. At the same time, this design also assists in the interference fit, further improving the tightness of the connection between the inner and outer boxes 1, preventing a decrease in packaging strength due to poor adhesion, providing more reliable protection for the contents, and meeting the stringent requirements for packaging stability in logistics and transportation scenarios.

[0071] The above embodiments are merely preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. A carton characterised in that ,include: The outer box (1) is a box-shaped structure with an open top, including two outer support plates (10) on both sides for maintaining the shape of the wall. The outer support plates (10) are connected by a foldable outer folding plate (11). The bottom of the outer support plates (10) and the outer folding plate (11) is provided with a container (12) to form a receiving space. The inner box (2) is a box-shaped structure with an open top. When the inner box (2) is unfolded, it can fit against the inner wall of the outer box (1) to form a double-layer structure. When the inner box (2) is folded, it can be placed in the storage space of the container (12). The top cover (3) covers the top of the outer box (1), and the top cover (3) includes a horizontal upper plate (30) and a downwardly extending vertical side plate (31).

2. A carton according to claim 1 wherein, The outer folding plate (11) of the outer box (1) includes a side folding part (110), an upper folding part (111) and a lower folding part (112) that are foldably connected to each other by a folding line (113). The folding line (113) is used to guide the folding direction of the outer folding plate (11) so that the outer box (1) is folded.

3. A carton according to claim 1 wherein, The inner box (2) includes inner support plates (20) on both sides corresponding to the outer folding plates (11). The inner support plates (20) are connected by foldable inner folding plates (21). The inner folding plates (21) on both sides are folded inward through the vertical folding line (113) in the middle, so that the inner box (2) is folded.

4. A carton according to claim 3 wherein, The inner support plate (20) has a handle plate (4) at the top center, and the bottom of the handle plate (4) is foldably connected to the inner support plate (20) via a folding line (113).

5. A carton according to claim 4 wherein, The outer folding plate (11) and the handle plate (4) are provided with corresponding handle holes (5).

6. A carton according to claim 1 wherein, A gap is formed between the two outer support plates (10) in the folded state to observe whether the inner box (2) is placed.

7. A carton according to claim 1 wherein, After the inner box (2) is unfolded, it forms an interference fit with the inner wall of the outer box (1).

8. A carton according to claim 1 wherein, The inner box (2) and the outer box (1) have anti-slip textures on their walls.

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