Carton corner anti-collision reinforcing corner structure
By setting L-shaped protective plates and support rods at the corners of the carton to form a frame structure, the problem of easy damage to the corners of the carton is solved, and the protection effect and service life are improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIAHANDA PACKAGING TECHNOLOGY (SUZHOU) CO LTD
- Filing Date
- 2025-08-31
- Publication Date
- 2026-07-24
AI Technical Summary
The edges and corners of cardboard boxes are easily damaged, affecting their moisture resistance and structural strength, and reducing their service life.
L-shaped protective plates are installed at the corners of the carton, and a frame structure is formed by rotating adjustment components and support rods. The corners of the carton are fixed by spring telescopic rods and clamps to accommodate cartons of different sizes.
It improves the protection of cardboard box edges and corners, extends service life, is suitable for cardboard boxes of various sizes, and prevents protective panels from falling off.
Smart Images

Figure CN224546882U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of cardboard boxes, and in particular to a corner protection structure for cardboard boxes to prevent collisions. Background Technology
[0002] Cardboard boxes are the most widely used packaging products. Depending on the materials used, there are corrugated cardboard boxes, single-layer cardboard boxes, etc., and there are various specifications and models. Cardboard boxes commonly have three or five layers, while seven layers are less common. Each layer consists of linerboard, corrugated paper, core paper, and face paper. Linerboard and face paper are made of kraft paper or kraft paper, while corrugated paper is used for the core paper.
[0003] Existing cardboard boxes require frequent handling and movement during use, so damage is inevitable, especially to the corners and edges, which are extremely vulnerable to damage. Once the corners and edges of the cardboard box are damaged, its moisture resistance and structural strength will be severely affected, reducing the service life of the cardboard box, and there is room for improvement. Utility Model Content
[0004] To overcome the above shortcomings, this utility model provides a corner protection structure to reinforce the corners of cardboard boxes, aiming to improve the problem that the corners of cardboard boxes are easily damaged by bumps.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a corner protection structure for a carton, comprising a carton body, with L-shaped protective plates at the four corners of the carton body, each protective plate comprising an upper plate and a lower plate, with two sets of spring telescopic rods fixedly connected to opposite ends of the upper and lower plates, a lower clamping plate fixedly connected to the bottom end of the lower plate, an upper clamping plate installed at the top end of the upper plate, and a rotation adjustment assembly installed at the top end of the upper plate for adjusting the rotation position of the upper clamping plate; and support rods provided on the four outer sides of the carton body, with both ends of the support rods fixedly connected to the outer walls of adjacent protective plates.
[0006] Preferably, the rotation adjustment assembly includes a first slide groove, which is formed on the upper surface of the upper plate. A slider is slidably connected inside the first slide groove, and one end of the slider is rotatably connected to one end of the upper plate through a torsion spring shaft.
[0007] Preferably, a first spring is fixedly connected to the inner wall of the first groove, and the other end of the first spring is fixedly connected to the outer wall of the slider.
[0008] Preferably, the rotation adjustment assembly further includes a limiting block, one end of which is fixedly connected to the outer wall of the upper plate.
[0009] Preferably, the rotation adjustment assembly further includes a T-shaped limiting groove, which is formed on the upper side wall of the upper plate.
[0010] Preferably, the support rod includes a rod body one and a rod body two. A second sliding groove is formed on the upper surface of the rod body one. A sliding seat is slidably connected inside the second sliding groove. One end of the sliding seat is rotatably connected to one end of the rod body two via a shaft.
[0011] Preferably, a second spring is fixedly connected to the inner wall of the second groove, and the other end of the second spring is fixedly connected to the outer wall of the sliding seat.
[0012] Preferably, the lower surface of the second rod is fixedly connected with an L-shaped hook, and the upper surface of the first rod is provided with several slots.
[0013] This utility model has the following beneficial effects:
[0014] 1. In this utility model, the rotating adjustment component facilitates the opening of the upper cardboard plate for easy insertion into the carton body, and the cardboard plate is quickly engaged after the carton is inserted, which prevents the protective plate from falling off. The protective plate is fixed to the corners of the carton body, which protects the corners of the carton body and extends the service life of the carton body.
[0015] 2. In this utility model, four sets of protective plates are connected by support rods, thereby forming an overall frame structure on the outside of the carton body, improving the lateral impact resistance of the protective plates. At the same time, the length of the support rods can be adjusted according to the side length of the corresponding carton body, making it suitable for use with carton bodies of various sizes. Attached Figure Description
[0016] Figure 1 This is a perspective view of the anti-collision reinforced corner protection structure for cardboard boxes proposed in this utility model;
[0017] Figure 2 This is a schematic diagram of the protective plate structure of the corner anti-collision reinforcement corner guard structure for cardboard boxes proposed in this utility model;
[0018] Figure 3 This is a schematic diagram of the rotating adjustment component of the anti-collision and reinforced corner protection structure for cardboard boxes proposed in this utility model;
[0019] Figure 4 This is a schematic diagram of the support rod structure of the anti-collision and reinforced corner protection structure for cardboard boxes proposed in this utility model.
[0020] Legend:
[0021] 1. Carton body; 2. Protective plate; 21. Upper plate; 22. Lower plate; 23. Spring telescopic rod; 24. Upper clamping plate; 25. Lower clamping plate; 3. Rotation adjustment assembly; 31. First slide groove; 32. Slider; 33. First spring; 34. Limiting block; 35. Limiting groove; 4. Support rod; 41. Rod body one; 42. Rod body two; 43. Second slide groove; 44. Sliding seat; 45. Second spring; 46. Hook; 47. Slot. Detailed Implementation
[0022] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0023] Reference Figure 1 and Figure 3 The embodiment provided by this utility model: a corner anti-collision reinforced corner protection structure for a carton, including a carton body 1, with L-shaped protective plates 2 respectively provided at the four corners of the carton body 1. The protective plate 2 includes an upper plate 21 and a lower plate 22. Two sets of spring telescopic rods 23 are fixedly connected to opposite ends of the upper plate 21 and the lower plate 22. A lower clamping plate 25 is fixedly connected to the bottom end of the lower plate 22. An upper clamping plate 24 is installed at the top end of the upper plate 21. A rotation adjustment component 3 is installed at the top end of the upper plate 21. The rotation adjustment component 3 is used to adjust the rotation position of the upper clamping plate 24. Support rods 4 are respectively provided on the four outer sides of the carton body 1. The two ends of the support rods 4 are fixedly connected to the outer walls of the adjacent protective plates 2 respectively.
[0024] Specifically, during installation, the upper clamping plate 24 is opened by rotating the adjustment assembly 3, and the carton body 1 is inserted into the protective plate 2. Then, the upper clamping plate 24 is rotated to the top of the carton body 1 by rotating the adjustment assembly 3. The upper clamping plate 24 and the lower clamping plate 25 cooperate to lock the upper and lower ends of the carton body 1. At the same time, the four sets of protective plates 2 are connected by the support rod 4 to form a stable frame structure, so that the protective plates 2 can be locked at the corners of the carton body 1 to protect the corners of the carton body 1. In addition, the height of the protective plates 2 can be adjusted according to the different heights of the carton body 1 by the telescopic spring telescopic rod 23, which is suitable for carton bodies 1 of various heights.
[0025] Reference Figure 3 The rotary adjustment component 3 includes a first slide groove 31, which is formed on the upper surface of the upper plate 21. A slider 32 is slidably connected inside the first slide groove 31. One end of the slider 32 is rotatably connected to one end of the upper plate 24 through a torsion spring shaft.
[0026] Specifically, the sliding mechanism is used to drive the upper pallet 24 to slide. The upper pallet 24 rotates to the left due to the torque of the torsion spring shaft, which facilitates the insertion of the carton body 1 when the upper pallet 24 is opened.
[0027] Reference Figure 3 The inner wall of the first slide groove 31 is fixedly connected to a first spring 33, and the other end of the first spring 33 is fixedly connected to the outer wall of the slider 32. The rotation adjustment assembly 3 also includes a limiting block 34, one end of which is fixedly connected to the outer wall of the upper plate 24. The rotation adjustment assembly 3 also includes a T-shaped limiting groove 35, which is opened on the upper side wall of the upper plate 21.
[0028] Specifically, the first spring 33 applies an elastic force to the slider 32, causing the limiting block 34 to insert into the right inner wall of the limiting groove 35. The limiting block 34 is then locked in place by the limiting groove 35, allowing the upper plate 24 to be fixed above the carton body 1. When the upper plate 24 needs to be opened, the slider 32 is pushed to the left, causing the limiting block 34 to abut against the left inner wall of the limiting groove 35. The limiting block 34 can then be rotated out from the upper opening of the limiting groove 35, thereby quickly opening the upper plate 24 and facilitating the removal of the carton.
[0029] Reference Figure 4 The support rod 4 includes a first rod body 41 and a second rod body 42. A second groove 43 is provided on the upper surface of the first rod body 41. A sliding seat 44 is slidably connected inside the second groove 43. One end of the sliding seat 44 is rotatably connected to one end of the second rod body 42 through a shaft.
[0030] Specifically, rod 41 and rod 42 are connected by a sliding seat 44, allowing them to slide and rotate simultaneously.
[0031] Reference Figure 4 The inner wall of the second slide groove 43 is fixedly connected to the second spring 45, and the other end of the second spring 45 is fixedly connected to the outer wall of the sliding seat 44. The lower surface of the second rod 42 is fixedly connected to the L-shaped hook 46, and the upper surface of the first rod 41 is provided with several slots 47.
[0032] Specifically, the elastic force applied to the sliding seat 44 by the second spring 45 causes the hook 46 to engage with the slot 47, thereby securing the first rod 41 and the second rod 42. When the length of the support rod 4 needs to be adjusted, the second rod 42 is pressed towards the first rod 41, allowing the hook 46 to rotate out of the slot 47. Then, by sliding the sliding seat 44, the hook 46 is rotated back into the corresponding slot 47 for engagement, thus allowing the length of the support rod 4 to be adjusted according to the side length of the carton.
[0033] Working principle: When the device is needed, first pull the slider 32 to move the limiting block 34 to the upper opening of the limiting groove 35. At this time, the upper clamping plate 24 can be rotated upward to open. Then, the corner of the carton is inserted along the protective plate 2. The lower clamping plate 25 clamps the lower surface of the carton body 1. Then, push the slider 32 and rotate the upper clamping plate 24 to make the limiting block 34 rotate into the inside of the limiting groove 35 again. The limiting block 34 is fixed inside the limiting groove 35 by the elastic force of the first spring 33. The upper clamping plate 24 clamps the upper surface of the carton body 1. At the same time, the four sets of protective plates 2 are connected by the support rod 4 to form a stable frame structure, so that the protective plates 2 can be clamped at the corners of the carton body 1 to protect the corners of the carton body 1. The elastic force applied to the sliding seat 44 by the second spring 45 causes the hook 46 to engage with the slot 47, fixing the first rod 41 and the second rod 42. When the length of the support rod 4 needs to be adjusted, the second rod 42 is pressed towards the first rod 41 and rotated, so that the hook 46 can rotate out of the slot 47. Then the hook 46 is engaged into the corresponding slot 47, thereby adjusting the length of the support rod 4. This allows the support rod 4 to be suitable for various sizes of carton bodies 1. After the carton body 1 is inserted, the support rod 4 is limited by the carton body 1 to prevent the hook 46 from exiting the slot 47. The corner protection structure of the carton is designed to prevent collisions. During use, the upper plate 24 can be easily opened by rotating the adjustment component 3 to facilitate insertion into the carton body 1. After the carton is inserted, the upper plate 24 is quickly engaged, which prevents the protective plate 2 from falling off. The four sets of protective plates 2 are connected by the support rod 4, thereby forming an overall frame structure on the outside of the carton body 1, which improves the lateral impact resistance of the protective plate 2.
[0034] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A corner protection structure for cardboard boxes, comprising a cardboard box body (1), characterized in that: The four corners of the carton body (1) are respectively provided with L-shaped protective plates (2). The protective plate (2) includes an upper plate (21) and a lower plate (22). Two sets of spring telescopic rods (23) are fixedly connected to the opposite ends of the upper plate (21) and the lower plate (22). The bottom end of the lower plate (22) is fixedly connected with a lower clamping plate (25). The top end of the upper plate (21) is equipped with an upper clamping plate (24). The top end of the upper plate (21) is equipped with a rotation adjustment component (3). The rotation adjustment component (3) is used to adjust the rotation position of the upper clamping plate (24). The four sides of the outer side of the carton body (1) are respectively provided with support rods (4). The two ends of the support rods (4) are respectively fixedly connected to the outer wall of the adjacent protective plate (2).
2. The corner protection structure for cardboard boxes according to claim 1, characterized in that: The rotation adjustment assembly (3) includes a first slide groove (31), which is opened on the upper surface of the upper plate (21). A slider (32) is slidably connected inside the first slide groove (31). One end of the slider (32) is rotatably connected to one end of the upper plate (24) through a torsion spring shaft.
3. The corner protection structure for cardboard boxes according to claim 2, characterized in that: A first spring (33) is fixedly connected to the inner wall of the first groove (31), and the other end of the first spring (33) is fixedly connected to the outer wall of the slider (32).
4. The corner protection structure for cardboard boxes according to claim 2, characterized in that: The rotation adjustment assembly (3) also includes a limiting block (34), one end of which is fixedly connected to the outer wall of the upper plate (24).
5. The corner protection structure for cardboard boxes according to claim 2, characterized in that: The rotation adjustment assembly (3) also includes a T-shaped limiting groove (35), which is formed on the upper side wall of the upper plate (21).
6. The corner protection structure for cardboard boxes according to claim 5, characterized in that: The support rod (4) includes a first rod body (41) and a second rod body (42). The upper surface of the first rod body (41) is provided with a second sliding groove (43). A sliding seat (44) is slidably connected inside the second sliding groove (43). One end of the sliding seat (44) is rotatably connected to one end of the second rod body (42) through a shaft.
7. The corner protection structure for cardboard boxes according to claim 6, characterized in that: A second spring (45) is fixedly connected to the inner wall of the second groove (43), and the other end of the second spring (45) is fixedly connected to the outer wall of the sliding seat (44).
8. The corner protection structure for cardboard boxes according to claim 6, characterized in that: The lower surface of the second rod (42) is fixedly connected with an L-shaped hook (46), and the upper surface of the first rod (41) is provided with several slots (47).