Corrugated carton capable of achieving internal limiting

By installing a waterproof film layer, limiting rods, and reinforcing plates on the outer wall and inner cavity of the corrugated cardboard box, the waterproofing and pressure resistance issues of the corrugated cardboard box are solved, achieving a better protective effect.

CN224131727UActive Publication Date: 2026-04-17SUZHOU DIDELA PACKAGING MATERIALS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
SUZHOU DIDELA PACKAGING MATERIALS CO LTD
Filing Date
2025-06-04
Publication Date
2026-04-17

AI Technical Summary

Technical Problem

Existing corrugated cardboard boxes have low structural strength, are prone to denting and deformation when squeezed, and lack waterproof function, making them susceptible to water damage.

Method used

A waterproof membrane layer is installed on the outer wall and bottom of the corrugated cardboard box, and horizontal and vertical limiting rods and side reinforcement plates are installed at the bottom and around the inner cavity to form a cross-shaped limiting structure, which enhances internal support and waterproof performance.

Benefits of technology

It improves the waterproof performance and pressure resistance of corrugated cardboard boxes, reduces dents and deformation, protects the contents, and enhances load-bearing capacity.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a corrugated carton capable of achieving internal limiting, and relates to the technical field of corrugated cartons, a transverse limiting rod is transversely arranged at the bottom of an inner cavity of a corrugated carton body, and longitudinal limiting rods are arranged in the middles of the front end face and the rear end face of the transverse limiting rod; first side face reinforcing plates are arranged on the left side and the right side of an inner cavity of the corrugated carton body correspondingly, and the bottoms of the first side face reinforcing plates on the left side and the right side are connected with the left end and the right end of a transverse limiting rod correspondingly. Firstly, the waterproof film layers are arranged on the periphery of the outer wall and the bottom of the corrugated carton body, the effective waterproof effect can be achieved through the arranged waterproof film layers, and the situation that water makes direct contact with the corrugated carton body, and consequently the corrugated carton body is soaked is avoided; a certain gap can be formed between the bottom of the corrugated carton main body and the placing surface, so that the bottom of the corrugated carton main body is prevented from being soaked if water exists on the placing surface.
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Description

Technical Field

[0001] This utility model relates to the field of corrugated cardboard box technology, specifically a corrugated cardboard box with internal positioning capability. Background Technology

[0002] Corrugated cardboard boxes are a widely used material in the modern packaging industry. They are composed of multiple layers of corrugated cardboard stacked together. This unique structure gives them excellent compression resistance and cushioning properties. Due to their lightweight and recyclable characteristics, they have become a preferred material for environmentally friendly packaging. They are commonly used to transport various goods, from fragile electronics to everyday food and beverages, providing excellent protection. Furthermore, the foldability of corrugated cardboard boxes greatly reduces space requirements during storage and transportation, further improving logistics efficiency. However, existing corrugated cardboard boxes still have some drawbacks. For example, their overall structural strength is not high, and they are prone to denting and deformation when compressed, causing varying degrees of damage to the items transported inside. They also lack waterproofing; water spilled on their surface and subsequent scratches easily cause damage. Therefore, we propose a corrugated cardboard box with internal locking mechanisms. Utility Model Content

[0003] The purpose of this invention is to provide a corrugated cardboard box with internal positioning to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A corrugated cardboard box with internal limiting, comprising a corrugated cardboard box body, a lateral limiting rod, and a second side reinforcing plate;

[0006] The bottom of the corrugated cardboard box is equipped with pads on all four sides, and the outer walls and bottom of the corrugated cardboard box are equipped with a waterproof film layer.

[0007] A transverse limiting rod is provided at the bottom of the inner cavity of the corrugated cardboard box body, and a longitudinal limiting rod is provided at the middle of the front and rear ends of the transverse limiting rod;

[0008] The inner cavity of the corrugated cardboard box body is provided with side reinforcement plates on both the left and right sides, and the bottom of the side reinforcement plates on both sides is connected to the left and right ends of the transverse limiting rod, respectively. The inner cavity of the corrugated cardboard box body is provided with side reinforcement plates in the middle of the front and rear ends, and the bottom of the side reinforcement plates is connected to the end of the longitudinal limiting rod away from the transverse limiting rod.

[0009] Both side reinforcement plates include a reinforcement plate body, with reinforcement blocks provided at the bottom of both the left and right sides of the reinforcement plate body, and reinforcement rods provided at the top of the reinforcement plate body.

[0010] Furthermore, each reinforcing block has a slot at its bottom center that matches the end of the longitudinal limiting rod, and the main body of the reinforcing plate, the reinforcing block, and the reinforcing rod are integrally formed.

[0011] Furthermore: all pads are made of plastic, all pads are L-shaped, and the top of each pad is fixedly bonded to the bottom of the corrugated cardboard box body.

[0012] Furthermore: Both side reinforcement plate one and side reinforcement plate two are made of plastic reinforcement plates, and an adhesive layer is provided at the center of the end of side reinforcement plate one and side reinforcement plate two near the inner wall of the corrugated cardboard box body.

[0013] Furthermore: the left and right sides of the lateral limiting rod are respectively attached to the inner cavity of the corrugated cardboard box body, and the ends of the longitudinal limiting rods away from the lateral limiting rods are attached to the front and rear end faces of the inner cavity of the corrugated cardboard box body.

[0014] Furthermore: slots are provided at the center of the top on both sides of the corrugated cardboard box body, and plastic edging is provided on the inner wall of each slot.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This internally restrained corrugated cardboard box features a waterproof membrane layer on all four sides and bottom of the outer wall of the main body. This membrane effectively prevents water from directly contacting the box and wetting it. Additionally, pads are placed around the bottom of the box to create a gap between the bottom and the surface it's placed on, preventing water from wetting the bottom if the surface is wet. Finally, a horizontal restraining rod and two sets of vertical restraining rods are installed at the bottom of the inner cavity of the box. The rod not only limits the corrugated cardboard box from the bottom of its inner cavity, preventing grooves from forming, but also increases the load-bearing capacity of the box's bottom. Additionally, two side reinforcement plates (one and two have the same structure, but the second is larger than the first) are installed around the inner cavity of the box. These reinforcement plates further limit and reinforce the box from all sides, reducing the likelihood of pressure-induced indentation and deformation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the corrugated cardboard box of this utility model;

[0019] Figure 3 This is a schematic diagram of the second side reinforcement plate of this utility model.

[0020] In the diagram: 1. Corrugated cardboard box body; 2. Slot; 3. Pad block; 4. Waterproof film layer; 5. Lateral limiting rod; 6. Longitudinal limiting rod; 7. Side reinforcement plate one; 8. Side reinforcement plate two; 9. Reinforcement plate body; 10. Reinforcement block; 11. Reinforcement rod; 12. Slot. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0022] Please see Figure 1-3 This utility model provides a technical solution: a corrugated cardboard box with internal limiting, including a corrugated cardboard box body 1, a transverse limiting rod 5, and a side reinforcing plate 8;

[0023] The bottom of the corrugated cardboard box body 1 is provided with pads 3 around all four sides. The pads 3 can create a certain gap between the bottom of the corrugated cardboard box body 1 and the placement surface, so as to prevent the bottom of the corrugated cardboard box body 1 from getting wet if there is water on the placement surface. The outer walls and bottom of the corrugated cardboard box body 1 are provided with a waterproof film layer 4. The waterproof film layer 4 can achieve an effective waterproof effect and prevent water from directly contacting the surface of the corrugated cardboard box body 1, thereby preventing the corrugated cardboard box body 1 from getting wet.

[0024] A transverse limiting rod 5 is provided at the bottom of the inner cavity of the corrugated cardboard box body 1. A longitudinal limiting rod 6 is provided at the middle of the front and rear ends of the transverse limiting rod 5. The combination of the transverse limiting rod 5 and the longitudinal limiting rod 6 can form a cross shape, which can effectively limit and reinforce the inner cavity of the corrugated cardboard box body 1 from the bottom, and also increase the load-bearing capacity.

[0025] The inner cavity of the corrugated cardboard box body 1 is provided with side reinforcement plates 7 on both the left and right sides, and the bottom of the side reinforcement plates 7 on both the left and right sides is connected to the left and right ends of the transverse limiting rod 5 respectively. The inner cavity of the corrugated cardboard box body 1 is provided with side reinforcement plates 8 in the middle of the front and rear end faces. The bottom of the side reinforcement plates 8 is connected to the end of the longitudinal limiting rod 6 away from the transverse limiting rod 5. The side reinforcement plates 7 and 8 have the same structure. By cooperating with the side reinforcement plates 7 and 8, the corrugated cardboard box body 1 can be limited and protected from the inner cavity of the corrugated cardboard box body 1, so as to avoid the phenomenon of denting and deformation under pressure.

[0026] The second side reinforcement plates 8 both include a reinforcement plate main body 9. At the bottom of both the left and right sides of the reinforcement plate main body 9, reinforcement blocks 10 are provided, and at the top of the reinforcement plate main body 9, reinforcement rods 11 are provided. Through the cooperation of the provided reinforcement blocks 10, reinforcement rods 11 and the reinforcement plate main body 9, the overall second side reinforcement plate 8 can form an inverted Chinese character 'tu' shape, which can effectively increase the limiting area of the second side reinforcement plate 8 and better protect the corrugated cardboard box main body 1.

[0027] Among them, preferably, at the center of the bottom of each reinforcement block 10, a card slot 12 matching the end of the longitudinal limiting rod 6 is provided. The reinforcement plate main body 9, reinforcement blocks 10 and reinforcement rods 11 are of an integrally formed structure. Through the provided card slot 12, the effect of limiting and connecting the longitudinal limiting rod 6 can be achieved, connecting the longitudinal limiting rod 6 with the second side reinforcement plate 8.

[0028] Preferably, the cushion blocks 3 are all set as plastic cushion blocks. The cushion blocks 3 are all set as 'L'-shaped. The tops of the cushion blocks 3 are fixedly bonded to the bottom of the corrugated cardboard box main body 1. The plastic cushion blocks are not only light in weight but also good in bearing capacity.

[0029] Preferably, the first side reinforcement plates 7 and the second side reinforcement plates 8 are both set as plastic reinforcement plates. The plastic reinforcement plates are light in weight, not easily damaged, and low in processing cost. At the center of one end of the first side reinforcement plates 7 and the second side reinforcement plates 8 close to the inner wall of the cavity of the corrugated cardboard box main body 1, an adhesive layer is provided. Through the provided adhesive layer, the first side reinforcement plates 7 and the second side reinforcement plates 8 can be stably installed on the inner wall of the cavity of the corrugated cardboard box main body 1. Embodiment

[0030] Refer to Figure 1-3 , what is different from the first embodiment in this embodiment is that the left and right sides of the transverse limiting rod 5 are respectively in close contact connection with the left and right inner cavities of the corrugated cardboard box main body 1, and the ends of the longitudinal limiting rods 6 far from the transverse limiting rod 5 are respectively in close contact connection with the front and rear end faces of the inner cavity of the corrugated cardboard box main body 1. Such a setting can increase the stability of the transverse limiting rod 5 and the longitudinal limiting rods 6 installed in the inner cavity of the corrugated cardboard box main body 1 and avoid the phenomenon of shaking and displacement; at the center of the top of both the left and right sides of the corrugated cardboard box main body 1, slots 2 are provided, and plastic edgings are provided on the inner walls of the slots 2. The provided slots 2 can facilitate the staff to carry the corrugated cardboard box main body 1, and the provided plastic edgings can avoid the phenomenon of edge warping and damage at the slots 2.

[0031] The electrical appliances mentioned in this article are all connected to an external power source through wires.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An internally limitable corrugated carton, characterized by: Includes the corrugated cardboard box body (1), the transverse limiting rod (5), and the second side reinforcement plate (8); The corrugated cardboard box body (1) is provided with pads (3) around the bottom, and the corrugated cardboard box body (1) is provided with a waterproof film layer (4) around the outer wall and bottom. A transverse limiting rod (5) is provided at the bottom of the inner cavity of the corrugated cardboard box body (1), and a longitudinal limiting rod (6) is provided at the middle of the front and rear end faces of the transverse limiting rod (5). The inner cavity of the corrugated cardboard box body (1) is provided with side reinforcement plates (7) on both the left and right sides, and the bottom of the side reinforcement plates (7) on both the left and right sides is connected to the left and right ends of the transverse limiting rod (5) respectively. The inner cavity of the corrugated cardboard box body (1) is provided with side reinforcement plates (8) in the middle of the front and rear end faces, and the bottom of the side reinforcement plates (8) is connected to the end of the longitudinal limiting rod (6) away from the transverse limiting rod (5). Each of the two side reinforcement plates (8) includes a reinforcement plate body (9), and reinforcement blocks (10) are provided at the bottom of both the left and right sides of the reinforcement plate body (9), and reinforcement rods (11) are provided at the top of the reinforcement plate body (9).

2. A set-back corrugated carton according to claim 1, wherein: The bottom center of each reinforcing block (10) is provided with a slot (12) that matches the end of the longitudinal limiting rod (6). The main body (9) of the reinforcing plate, the reinforcing block (10) and the reinforcing rod (11) are integrally formed.

3. The internally limited corrugated carton of claim 1, wherein: All the pads (3) are plastic pads, all the pads (3) are L-shaped, and the top of each pad (3) is fixedly bonded to the bottom of the corrugated cardboard box body (1).

4. The internally limited corrugated carton of claim 1, wherein: Both the first side reinforcement plate (7) and the second side reinforcement plate (8) are plastic reinforcement plates. An adhesive layer is provided at the center of one end of the first side reinforcement plate (7) and the second side reinforcement plate (8) near the inner wall of the corrugated carton body (1).

5. The internally limited corrugated carton of claim 1, wherein: The left and right sides of the lateral limiting rod (5) are respectively attached to the inner cavity of the corrugated carton body (1), and the end of the longitudinal limiting rod (6) away from the lateral limiting rod (5) is attached to the front and rear end faces of the inner cavity of the corrugated carton body (1).

6. The internally limited corrugated carton of claim 1, wherein: The corrugated cardboard box body (1) has slots (2) at the top center of both sides, and plastic edging is provided on the inner wall of each slot (2).