A corrugated carton with adjustable interior space
By incorporating adjustable protective mechanisms and limiting structures within corrugated cardboard boxes, the problem of traditional corrugated cardboard boxes being unable to adapt to diverse product packaging has been solved, achieving safe product transportation and resource conservation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HEFEI DUOYI PACKAGE PROD CO LTD
- Filing Date
- 2025-06-19
- Publication Date
- 2026-06-02
AI Technical Summary
Traditional corrugated cardboard boxes have a fixed internal space, which cannot adapt to the diverse packaging needs of products. This leads to products shaking and being damaged during transportation, as well as wasting space resources. They cannot meet the flexible packaging needs of e-commerce and manufacturing industries.
By setting up protective mechanisms such as corner protectors, a first fixed beam, and a first telescopic beam, the box size can be adjusted, and the internal space can be adjusted through limiting plates and limiting slides. Combined with the protective function of stainless steel, this achieves adaptable packaging for products of different sizes.
It effectively protects products from damage during transportation, reduces resource waste, improves transportation efficiency and space utilization, and meets diverse packaging needs.
Smart Images

Figure CN224312265U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of corrugated cardboard box technology, specifically a corrugated cardboard box with adjustable internal space. Background Technology
[0002] Traditional corrugated cardboard boxes dominate the logistics packaging sector due to their low cost, ease of processing, and recyclability. However, their fixed internal space design struggles to adapt to the diverse packaging needs of products. When packaging dimensions are smaller than the internal space of the cardboard box, products may shift and collide during transport, increasing the risk of damage. For larger products, incompatible existing cardboard box sizes prevent effective loading. Furthermore, single-size cardboard boxes occupy significant space during warehousing and transportation, increasing logistics costs. This "one-size-fits-all" packaging approach not only wastes resources but also fails to meet the growing demand for flexible packaging from e-commerce and manufacturing industries.
[0003] Traditional corrugated cardboard boxes are primarily made of paper, with their structure mainly relying on the bonding of corrugated core paper and linerboard. During transportation, these boxes face numerous challenges. The logistics and transportation process is complex, involving everything from the throwing and stacking during loading and unloading to the continuous vibrations caused by road bumps during transport, and the potential for strong collisions and impacts during transshipment. Due to the limited cushioning capacity of paper, corrugated cardboard boxes are highly susceptible to damage and deformation under these external forces. In severe cases, this can even damage the product inside, affecting product quality and delivery. Utility Model Content
[0004] This utility model provides a corrugated cardboard box with adjustable internal space. The protective mechanism can be effectively adjusted by the setting of corner protectors, first fixed beam and first telescopic beam in the protective mechanism, so as to adapt to the box body of different sizes. The setting of first limiting plate, second limiting plate and limiting slide groove can effectively adjust the internal space of the box body, so as to facilitate the placement of different products.
[0005] To achieve the above objectives, a corrugated cardboard box with adjustable internal space is provided, comprising a box body, a protective mechanism movably connected to the outer wall of the box body, an anti-slip pad fixedly connected above the protective mechanism, a limiting component fixedly connected above the anti-slip pad, a limiting groove formed on the inner surface of the box body, a second limiting plate movably installed within the limiting groove, a limiting slot formed on the second limiting plate, and a first limiting plate snapped into the limiting slot. The protective mechanism, with its corner protectors, first fixed beam, and first telescopic beam, can be effectively adjusted to accommodate boxes of different sizes. The first limiting plate, second limiting plate, and limiting groove effectively adjust the internal space of the box, facilitating the placement of different products. The anti-slip pad effectively prevents slippage; the anti-slip pad on the lower surface of the corner protector is removable, while the anti-slip pad at the bottom of the corner protector is fixed with screws. The limiting component effectively limits the stacking of boxes on top of the box and provides a certain alignment effect, facilitating stacking.
[0006] According to the aforementioned corrugated cardboard box with adjustable internal space, the protective mechanism includes a first fixed beam, a first limiting hole, a first telescopic beam, an internal hex bolt, a second limiting hole, corner protectors, a second fixed beam, and a second telescopic beam. The first limiting hole on the first fixed beam corresponds to the one on the first telescopic beam. The corner protectors, the first fixed beam, and the first telescopic beam in the protective mechanism can effectively adjust the mechanism, thus facilitating adaptation to boxes of different sizes. Furthermore, the protective mechanism is made of stainless steel, providing effective protection.
[0007] According to the aforementioned corrugated cardboard box with adjustable internal space, the inner side of the corner protectors is fitted around the perimeter of the box body, and a first fixing beam is fixedly connected to one side of each corner protector. The corner protectors effectively protect the corners of the box, and the first fixing beam facilitates the retraction and extension of the first telescopic beam, thus providing protection.
[0008] According to the aforementioned corrugated cardboard box with adjustable internal space, a first telescopic beam is slidably installed inside the first fixed beam, and both the first fixed beam and the first telescopic beam have first limiting holes. The limiting holes between the telescopic beam and the fixed beam are positioned correspondingly, which can effectively and conveniently align and fix the distance between the corner protectors.
[0009] According to the aforementioned corrugated cardboard box with adjustable internal space, an internal hexagon bolt is threaded into the first limiting hole, and a second fixing beam is fixedly connected to the other side of the corner protector. The internal hexagon bolt in the first limiting hole can effectively fix and limit the fixing beam and the telescopic beam.
[0010] According to the aforementioned corrugated cardboard box with adjustable internal space, a second telescopic beam is slidably connected within the second fixed beam, and a second limiting hole is provided on both the second fixed beam and the second telescopic beam. The second fixed beam and the second telescopic beam serve the same function as the first fixed beam and the first telescopic beam.
[0011] According to the aforementioned corrugated cardboard box with adjustable internal space, threads are provided in the second limiting hole and the first limiting hole, and both sides of the first fixed beam and the first telescopic beam are fixedly connected to one side surface of the corner protectors. The fixed beam and the telescopic beam are fixedly connected between each pair of corner protectors.
[0012] The beneficial effects of this utility model are as follows: the protective mechanism can be effectively adjusted by setting up corner guards, a first fixed beam and a first telescopic beam, etc., so as to adapt to boxes of different sizes. The setting of the first limiting plate, the second limiting plate and the limiting slide groove can effectively adjust the internal space of the box, so as to facilitate the placement of different products.
[0013] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments;
[0015] Figure 1 This is a three-dimensional sectional view of the overall structure of a corrugated cardboard box with adjustable internal space according to the present invention.
[0016] Figure 2 This is a three-dimensional schematic diagram of the overall structure of a corrugated cardboard box with adjustable internal space according to the present invention.
[0017] Figure 3 This is a schematic diagram of the limiting plate in the overall structure of a corrugated cardboard box with adjustable internal space according to this utility model.
[0018] Figure 4 This utility model Figure 1 A magnified structural diagram of point A in the middle.
[0019] Legend:
[0020] 1. Housing; 2. Protective mechanism; 3. Limiting groove; 4. First limiting plate; 5. Second limiting plate; 6. Anti-slip pad; 7. Limiting component; 8. Limiting slot; 201. First fixed beam; 202. First limiting hole; 203. First telescopic beam; 204. Hex socket head cap screw; 205. Second limiting hole; 206. Corner guard; 207. Second fixed beam; 208. Second telescopic beam. Detailed Implementation
[0021] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.
[0022] Reference Figures 1 to 4 This utility model provides a corrugated cardboard box with adjustable internal space, comprising a box body 1, a protective mechanism 2 movably connected to the outer wall of the box body 1, an anti-slip pad 6 fixedly connected above the protective mechanism 2, a limiting member 7 fixedly connected above the anti-slip pad 6, a limiting groove 3 opened on the inner surface of the box body 1, a second limiting plate 5 movably installed in the limiting groove 3, a limiting slot 8 opened on the second limiting plate 5, and a first limiting plate 4 snapped into the limiting slot 8.
[0023] The protective mechanism 2 includes a first fixed beam 201, a first limiting hole 202, a first telescopic beam 203, an internal hex bolt 204, a second limiting hole 205, a corner protector 206, a second fixed beam 207, and a second telescopic beam 208. The first limiting hole 202 on the first fixed beam 201 corresponds to the one on the first telescopic beam 203. The inner side of the corner protector 206 is fitted around the outside of the box body 1, and one side of the corner protector 206 is fixedly connected to the first fixed beam 201.
[0024] A first telescopic beam 203 is slidably installed inside the first fixed beam 201. A first limiting hole 202 is provided on the first fixed beam 201 and the first telescopic beam 203. An internal hex bolt 204 is threaded into the first limiting hole 202. A second fixed beam 207 is fixedly connected to the other side of the corner protector 206. A second telescopic beam 208 is slidably connected inside the second fixed beam 207. A second limiting hole 205 is provided on the second limiting hole 205 and the second telescopic beam 208. Threads are provided in the second limiting hole 205 and the first limiting hole 202. Both sides of the first fixed beam 201 and the first telescopic beam 203 are fixedly connected to one side surface of the corner protector 206.
[0025] Working principle: Place the corrugated cardboard box on a flat surface. Then, based on the dimensions of the box body 1, make preliminary adjustments to the first fixed beam 201, the first telescopic beam 203, the second fixed beam 207, and the second telescopic beam 208 that are fixedly connected between the corner protectors 206. The adjusted dimensions are slightly larger than the dimensions of the outer wall of the box body 1. Install the protective mechanism 2 from top to bottom onto the outside of the box body 1. Use tools to remove the hex bolts 204 and move the first telescopic beam 203 inward toward the first fixed beam 201, thereby narrowing the gap between the corner protectors 206. The distance is then determined, and the internal hex bolts 204 are installed in the first limiting hole 202. During installation, the first limiting holes 202 on the first fixed beam 201 and the first telescopic beam 203 are aligned before installation and fixation. The second fixed beam 207 and the second telescopic beam 208 are operated in the same way. Multiple limiting grooves 3 are provided inside the box body 1. The number of first limiting plates 4 and second limiting plates 5 slidably installed in the limiting grooves 3 will adjust the space inside the box body 1 to different sizes. The first limiting plate 4 is installed on the second limiting plate 5.
[0026] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.
Claims
1. A corrugated cardboard box with adjustable internal space, characterized in that, The box includes a housing (1), a protective mechanism (2) is movably connected to the outer wall of the housing (1), an anti-slip pad (6) is fixedly connected above the protective mechanism (2), a limiting member (7) is fixedly connected above the anti-slip pad (6), a limiting groove (3) is opened on the inner surface of the housing (1), a second limiting plate (5) is movably installed in the limiting groove (3), a limiting slot (8) is opened on the second limiting plate (5), and a first limiting plate (4) is snapped into the limiting slot (8).
2. A corrugated cardboard box with adjustable internal space according to claim 1, characterized in that, The protective mechanism (2) includes a first fixed beam (201), a first limiting hole (202), a first telescopic beam (203), an internal hex bolt (204), a second limiting hole (205), a corner guard (206), a second fixed beam (207), and a second telescopic beam (208), with the first limiting hole (202) on the first fixed beam (201) and the corresponding hole on the first telescopic beam (203).
3. A corrugated cardboard box with adjustable internal space according to claim 2, characterized in that, The inner side of the corner protector (206) is fitted around the outside of the box body (1), and a first fixing beam (201) is fixedly connected to one side of the corner protector (206).
4. A corrugated cardboard box with adjustable internal space according to claim 2, characterized in that, A first telescopic beam (203) is slidably installed inside the first fixed beam (201), and a first limiting hole (202) is provided on the first fixed beam (201) and the first telescopic beam (203).
5. A corrugated cardboard box with adjustable internal space according to claim 4, characterized in that, The first limiting hole (202) is internally threaded with an internal hex bolt (204), and the other side of the corner guard (206) is fixedly connected with a second fixing beam (207).
6. A corrugated cardboard box with adjustable internal space according to claim 5, characterized in that, The second fixed beam (207) is slidably connected to the second telescopic beam (208), and the second limiting hole (205) is provided on the second limiting hole (205) and the second telescopic beam (208).
7. A corrugated cardboard box with adjustable internal space according to claim 2, characterized in that, The second limiting hole (205) and the first limiting hole (202) are provided with threads, and both sides of the first fixed beam (201) and the first telescopic beam (203) are fixedly connected to one side surface of the corner protector (206).