A carton having a built-in reinforcing layer

Abstract

This disclosure relates to the technical field of cardboard boxes. One embodiment of this disclosure provides a cardboard box with a built-in reinforcing layer, comprising: a box bottom, a box lid, and splicing cardboard. The splicing cardboard is inserted between the box bottom and the box lid. A reinforcing structure is disposed between the box bottom and the box lid, and an anti-detachment structure is disposed between the box lid and the splicing cardboard. The reinforcing structure includes a reinforcing bottom plate, which is adhered to the inner surface of the box bottom. Inner support plates are provided on all four end faces of the reinforcing bottom plate, and the inner support plates are attached to the inner wall of the splicing cardboard. Reinforcing corners are attached to the inner end faces of the splicing cardboard, and the splicing cardboard is attached to the splicing joint. Several hooks are inserted into the outer end faces of the splicing cardboard, passing through the splicing cardboard and the reinforcing corners. This technical solution solves the technical problem of existing technologies that rely solely on simple glue bonding or nailing for splicing. This structural design makes the cardboard box prone to bending and damage when subjected to pressure and impact.

Description

Technical Field

[0001] The embodiments disclosed herein relate to the technical field of cardboard boxes, and more specifically, to a cardboard box with a built-in reinforcing layer. Background Technology

[0002] In the logistics and packaging sectors, cardboard boxes are the most widely used packaging material, and their structural strength directly affects the integrity and safety of goods. However, traditional, ordinary assembled cardboard boxes have significant drawbacks in practical use, making it difficult to meet the stringent reliability requirements of modern logistics and transportation.

[0003] Currently, most assembled cardboard boxes on the market use a single-layer corrugated cardboard structure, assembled simply by gluing or nailing. This structural design makes the boxes extremely prone to bending and breakage when subjected to pressure and impact. During warehousing, stacked boxes often lack sufficient compressive strength, causing the lower layers to collapse and deform, affecting space utilization and potentially damaging the contents. During transportation, the joints of ordinary cardboard boxes are easily cracked by bumps, squeezing, and collisions, leading to packaging failure. Furthermore, traditional cardboard boxes lack effective reinforcement designs, failing to provide stable support for heavy or irregularly shaped items, increasing the risk of damage.

[0004] Therefore, it is urgent to develop a cardboard box with a built-in reinforcing layer that has high strength and high stability. Utility Model Content

[0005] To overcome the aforementioned shortcomings, embodiments of this disclosure provide a cardboard box with a built-in reinforcing layer, solving the problem of existing technologies that rely solely on simple glue bonding or nailing for assembly. This structural design makes the cardboard box highly susceptible to bending and damage when subjected to pressure and impact.

[0006] According to one aspect, at least one embodiment of this disclosure provides a cardboard box with a built-in reinforcing layer, comprising:

[0007] The box bottom, box lid, and cardboard joint, wherein the cardboard joint is inserted between the box bottom and the box lid;

[0008] A reinforcing structure is provided between the bottom of the box and the lid of the box;

[0009] An anti-detachment structure is provided between the box lid and the splicing cardboard.

[0010] The reinforcing structure includes a reinforcing base plate, which is adhered to the inner surface of the box bottom. The reinforcing base plate has a cross-shaped structure, and inner support plates are provided on all four end faces of the reinforcing base plate. The inner support plates are attached to the inner wall of the spliced ​​cardboard.

[0011] As a further technical solution, the inner end face of the splicing cardboard is fitted with a reinforcing angle, the splicing cardboard is fitted at the splicing interface of the splicing cardboard, and a number of hooks are inserted into the outer end face of the splicing cardboard, the hooks passing through the splicing cardboard and the reinforcing angle.

[0012] As a further technical solution, the splicing cardboard has horizontal openings on both sides, and a pair of them have mating interfaces on the surface of the inner support plate. A handle is inserted into the mating interface, and one end of the handle is located outside the splicing cardboard.

[0013] As a further technical solution, the anti-detachment structure includes a pair of vertical holes, wherein a pair of opposing inner support plates are provided with lower protrusions, the lower protrusions pass through the vertical holes, and upper protrusions are provided on both sides of the box cover, and notches are opened on the surfaces of the upper protrusions and the lower protrusions.

[0014] As a further technical solution, the opening direction of the notch on the upper protrusion is opposite to that on the lower protrusion.

[0015] As a further technical solution, grooves are provided on both ends of the interface, and both ends of the handle are embedded in the grooves.

[0016] As a further technical solution, the inner surface of the spliced ​​cardboard is reinforced and bonded to the inner support plate with adhesive.

[0017] As a further technical solution, the size of the horizontal opening is larger than the size of the opening of the opposite interface.

[0018] The beneficial effects of the embodiments disclosed herein are as follows:

[0019] In this disclosure, the reinforced structure enhances the overall strength of the carton through the synergy of multiple components. The cross-shaped reinforcing bottom plate is bonded to the inner surface of the bottom of the carton to provide stable support. The four-end inner support plates are attached to the inner wall of the spliced ​​cardboard to distribute pressure and prevent side wall dents. The reinforced corners at the splicing joints are fixed with hooks to prevent the joints from cracking. The design of the horizontal opening and the butt joint facilitates the installation of handles. After the handle is embedded in the groove, the connection between the inner support plate and the spliced ​​cardboard is further reinforced, forming a three-dimensional support network. This comprehensively improves the load-bearing capacity of the carton from the bottom, side walls to the splicing joints, making it less prone to deformation and damage when carrying heavy objects, thus solving the problem of insufficient compressive strength of traditional cartons. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.

[0021] Figure 1 This is a schematic diagram of a structure in one embodiment of the present disclosure;

[0022] Figure 2 This is an isometric drawing of the present disclosure;

[0023] Figure 3 This is an isometric sectional view of the present disclosure;

[0024] Figure 4 Appendix to this disclosure Figure 3 Enlarged view of part A in the middle;

[0025] In the diagram: 1. Box bottom; 2. Box lid; 3. Spliced ​​cardboard; 4. Reinforcing structure; 4-1. Reinforcing bottom plate; 4-2. Inner support plate; 4-3. Reinforcing corner; 4-4. Hook; 4-5. Horizontal opening; 4-6. Interlocking joint; 4-7. Handle; 5. Anti-detachment structure; 5-1. Vertical hole; 5-2. Lower protrusion; 5-3. Upper protrusion; 5-4. Notch; 6. Groove. Detailed Implementation

[0026] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.

[0027] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0028] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0029] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0030] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0031] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0032] like Figures 1-4 As shown, a cardboard box with a built-in reinforcing layer is illustrated in one embodiment of this disclosure, comprising:

[0033] The box includes a bottom 1, a lid 2, and a splicing cardboard 3, wherein the splicing cardboard 3 is inserted between the bottom 1 and the lid 2.

[0034] Reinforcing structure 4 is disposed between the bottom of the box 1 and the cover of the box 2;

[0035] Anti-detachment structure 5, wherein the anti-detachment structure 5 is disposed between the box cover 2 and the splicing cardboard 3;

[0036] The reinforcing structure 4 includes a reinforcing base plate 4-1, which is adhered to the inner surface of the box bottom 1. The reinforcing base plate 4-1 has a cross-shaped structure. Each of the four end faces of the reinforcing base plate 4-1 is provided with an inner support plate 4-2. The inner support plate 4-2 is attached to the inner wall of the splicing cardboard 3. The inner end face of the splicing cardboard 3 is attached with a reinforcing angle 4-3. The splicing cardboard 3 is attached to the splicing joint of the splicing cardboard 3. Several hooks 4-4 are inserted into the outer end face of the splicing cardboard 3. The hooks 4-4 pass through the splicing cardboard 3 and the reinforcing angle 4-3. Horizontal openings 4-5 are opened on opposite sides of the splicing cardboard 3. A pair of openings 4-6 are opened on the surface of the inner support plate 4-2. A handle 4-7 is inserted into the joint 4-6. One end of the handle 4-7 is located outside the splicing cardboard 3.

[0037] In some examples, a reinforcing structure 4 is designed to enhance the internal support strength of the carton. The reinforcing base plate 4-1 is made of high-strength corrugated cardboard in a cross-shaped structure, firmly bonded to the inner surface of the carton bottom 1, providing a stable bottom support foundation for the entire carton. The four-end extending inner support plate 4-2 fits tightly against the inner wall of the splicing cardboard 3, effectively dispersing external pressure and preventing the carton's side walls from denting or deforming. The reinforcing corner 4-3 at the splicing joint of the splicing cardboard 3 is fixedly connected to the splicing cardboard 3 by hooks 4-4, enhancing the connection strength at the splicing joint and preventing cracking. Furthermore, the design of the horizontal opening 4-5 and the connecting interface 4-6 not only facilitates the installation of the handle 4-7, improving handling convenience, but also, after the handle 4-7 is inserted into the connecting interface 4-6, further strengthens the connection between the inner support plate 4-2 and the splicing cardboard 3, forming a three-dimensional support network. The combined effect of multiple reinforcing components enhances the structural strength of the carton from the bottom and side walls to the splicing joints, making it less prone to deformation and damage when bearing heavy loads, significantly improving the carton's durability and load-bearing capacity.

[0038] like Figures 1-4 As shown in the figure, the anti-detachment structure 5 proposed in this embodiment includes a pair of vertical holes 5-1, wherein a pair of opposing inner support plates 4-2 are provided with lower protrusions 5-2, the lower protrusions 5-2 pass through the vertical holes 5-1, and upper protrusions 5-3 are provided on both end faces of the box cover 2, and notches 5-4 are opened on the surfaces of the upper protrusions 5-3 and the lower protrusions 5-2.

[0039] In some examples, an anti-detachment structure 5 is designed to prevent the lid 2 from falling off. The lower protrusion 5-2 on the inner support plate 4-2 passes through the vertical hole 5-1 in the splicing cardboard 3 and corresponds to the upper protrusions 5-3 on both sides of the lid 2. The notches 5-4 on the surfaces of the upper and lower protrusions 5-3 are specifically designed for accommodating straps. When transporting or storing items, the straps are passed through the notches 5-4 of the upper and lower protrusions 5-2 and tightened to form a secure binding structure. The tension of the straps keeps the lid 2 tightly connected to the splicing cardboard 3, preventing it from easily falling off even when subjected to shaking, collisions, or other external forces during handling. This design is simple and practical, requiring no complex locking structure. Reliable anti-detachment is achieved using common straps, while also facilitating quick disassembly of the lid 2, meeting the needs of frequent opening and closing in daily use and effectively ensuring the safety of the items inside the box.

[0040] For example, such as Figure 1 As shown, the opening direction of the notch 5-4 of the upper protrusion 5-3 is opposite to that of the lower protrusion 5-2.

[0041] In some examples, the opposite opening structure prevents the straps from coming undone after connection, making the connection more secure and less prone to detachment, thus improving safety during carrying. The design of the opposite opening directions of the notches 5-4 on the upper protrusion 5-3 and the lower protrusion 5-2 creates a cross-binding mechanical structure after the straps pass through the notches 5-4. When the carton is subjected to external pulling or shaking, the oppositely opening notches 5-4 apply friction and restraint forces to the straps from different directions, effectively dispersing stress and preventing the straps from slipping due to uneven force. For example, during handling, even with severe bumps, this cross-binding structure ensures that the lid 2 remains tightly connected to the carton body. Simultaneously, the opposite opening design ensures that after the straps are tightened, they form a stable fit within the notches 5-4, further enhancing the stability of the connection and significantly reducing the risk of the lid 2 accidentally detaching. This provides reliable protection for the contents of the carton and meets the stringent safety requirements for cartons in logistics transportation and daily use.

[0042] For example, such as Figure 4 As shown, grooves 6 are provided on both ends of the interface 4-6, and both ends of the handle 4-7 are embedded in the grooves 6.

[0043] In some examples, the inclusion of a groove 6 increases the connection strength between the handle 4-7 and the inner support plate 4-2, preventing excessive bending when upward or downward force is applied. The tight fit between the groove 6 and the ends of the handle 4-7 significantly increases the contact area, allowing it to withstand greater tensile and compressive forces compared to a standard flat connection. When the handler pulls the handle 4-7 upward, the support provided by the sidewall of the groove 6 effectively disperses stress, preventing the base of the handle 4-7 from bending due to concentrated force. When placing the carton downward, the groove 6 also firmly supports the pressure transmitted by the handle 4-7, reducing the risk of deformation. Furthermore, the precise dimensional fit of the groove 6 ensures that the handle 4-7 does not wobble after installation, further enhancing connection stability. This structural design not only extends the service life of the handle 4-7 but also improves safety and comfort during handling, allowing users to operate the carton without worrying about damage to the handle 4-7, providing reliable handling protection for the carton with the built-in reinforcement layer.

[0044] For example, such as Figure 1 As shown, the inner surface of the splicing cardboard 3 is reinforced and bonded to the inner support plate 4-2 with adhesive.

[0045] In some examples, adhesive bonding ensures a tight fit between the splicing cardboard 3 and the inner support plate 4-2 without affecting the internal space. A high-strength, environmentally friendly adhesive is used, possessing excellent initial tack and long-lasting adhesion. This adhesive forms a strong molecular-level bond between the splicing cardboard 3 and the inner support plate 4-2, ensuring a tight, gapless fit and effectively enhancing the overall structural strength of the carton. This bonding method differs from traditional mechanical connections, requiring no additional connectors and not occupying internal space, thus ensuring the carton's internal volume remains unaffected and can fully accommodate the contents. Furthermore, the adhesive layer is thin and uniform, maintaining connection strength without compromising the carton's appearance or stacking performance due to excessive thickness, allowing the carton to maintain good shape and stability during storage and transportation.

[0046] For example, such as Figure 4 As shown, the opening size of the horizontal opening 4-5 is larger than the opening size of the opposite interface 4-6.

[0047] In some examples, the larger opening size of the cross opening 4-5 allows for a gap between it and the handle 4-7. The handle 4-7 tilts slightly during use, preventing it from pressing against the cross opening 4-5 and causing tearing. When the handler lifts the handle 4-7, the gap allows it to tilt slightly at a natural angle, preventing the force from being applied directly to the edge of the cross opening 4-5. This design effectively disperses the stress generated during lifting, preventing stress concentration at the cross opening 4-5 and thus preventing tearing of the cardboard. Simultaneously, the appropriate gap provides room for the handle 4-7 to move. Even with some degree of wobbling or shifting during frequent use, it will not damage the spliced ​​cardboard 3 due to excessive friction or pressure against the edge of the cross opening 4-5, thereby extending the carton's lifespan and ensuring the carton structure remains intact during multiple handling operations, providing reliable protection for the contents.

[0048] In actual use: Prepare the bottom 1 and lid 2 of the box. Insert the spliced ​​cardboard 3 between the bottom 1 and lid 2. Glue a cross-shaped reinforcing base plate 4-1 to the inner surface of the bottom 1. Attach the four ends of the reinforcing base plate 4-1 to the inner support plate 4-2 and reinforce it with adhesive to the inner wall of the spliced ​​cardboard 3. Attach reinforcing corners 4-3 to the inner side of the splicing joints of the spliced ​​cardboard 3. Insert hooks 4-4 from the outside, passing through the spliced ​​cardboard 3 and reinforcing corners 4-3 for fixation. Make horizontal openings 4-5 and mating joints 4-6 on opposite sides of the spliced ​​cardboard 3. Insert the handles 4-7 into the grooves 6 on both sides of the mating joints 4-6. The lower protrusion 5-2 on the surface of the inner support plate 4-2 passes through the vertical hole 5-1 of the splicing cardboard 3. The upper protrusion 5-3 on both sides of the box lid 2 corresponds to the lower protrusion 5-2. When in use, put the items into the carton, close the box lid 2, and use the strap to pass through the notch 5-4 of the upper protrusion 5-3 and the lower protrusion 5-2 and tighten it. The straps cross and bind because the opening directions of the notch 5-4 of the upper and lower protrusions 5-2 are opposite. When carrying, apply force through the handle 4-7. The gap between the horizontal opening 4-5 and the handle 4-7 allows the handle 4-7 to tilt slightly, avoiding tearing of the horizontal opening 4-5, and realizing the safe transportation and storage of items.

[0049] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.

Claims

1. A carton having a built-in reinforcing layer, characterized in that include: The box bottom (1), the box lid (2), and the splicing cardboard (3) are inserted between the box bottom (1) and the box lid (2); A reinforcing structure (4) is provided between the bottom of the box (1) and the lid of the box (2); Anti-detachment structure (5), the anti-detachment structure (5) is disposed between the box cover (2) and the splicing cardboard (3); The reinforcing structure (4) includes a reinforcing base plate (4-1), which is adhered to the inner surface of the bottom of the box (1). The reinforcing base plate (4-1) has a cross-shaped structure, and each of the four ends of the reinforcing base plate (4-1) is provided with an inner support plate (4-2). The inner support plate (4-2) is attached to the inner wall of the splicing cardboard (3).

2. A carton with a built-in reinforcing layer according to claim 1, characterized in that The inner end face of the splicing cardboard (3) is fitted with a reinforcing angle (4-3), the splicing cardboard (3) is fitted at the splicing interface of the splicing cardboard (3), and a number of hooks (4-4) are inserted into the outer end face of the splicing cardboard (3). The hooks (4-4) pass through the splicing cardboard (3) and the reinforcing angle (4-3).

3. A carton incorporating a reinforcing layer according to claim 2, wherein, The splicing cardboard (3) has horizontal openings (4-5) on both sides, and a pair of interfaces (4-6) are opened on the surface of the inner support plate (4-2). A handle (4-7) is inserted into the interface (4-6), and one end of the handle (4-7) is located outside the splicing cardboard (3).

4. A carton with a built-in reinforcing layer according to claim 1, characterized in that, The anti-detachment structure (5) includes a pair of vertical holes (5-1), wherein a pair of opposing inner support plates (4-2) are provided with lower protrusions (5-2), the lower protrusions (5-2) pass through the vertical holes (5-1), and the two end faces of the box cover (2) are provided with upper protrusions (5-3), and the surfaces of the upper protrusions (5-3) and the lower protrusions (5-2) are provided with notches (5-4).

5. A carton incorporating a reinforcing layer according to claim 4, wherein, The opening direction of the upper protrusion (5-3) is opposite to that of the notch (5-4) of the lower protrusion (5-2).

6. A carton incorporating a reinforcing layer according to claim 3, wherein, Both ends of the interface (4-6) are provided with grooves (6), and both ends of the handle (4-7) are embedded in the grooves (6).

7. A cardboard box with an internal reinforcing layer according to claim 1, characterized in that, The inner surface of the splicing cardboard (3) is bonded to the inner support plate (4-2) with adhesive for reinforcement.

8. A carton according to claim 3, wherein, The opening size of the horizontal port (4-5) is larger than the opening size of the opposite port (4-6).

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