A cardboard box with corner sealing protection
By installing L-shaped corner strips, bases, fixing grooves, and cushioning components inside the carton, the problem of unstable corner reinforcement strips in corrugated cardboard boxes is solved, achieving corner stability and cushioning effect, and enhancing the impact resistance and waterproof performance of the carton.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DONGGUAN ZHIMEI GREEN PACKAGING TECH CO LTD
- Filing Date
- 2025-07-21
- Publication Date
- 2026-05-26
AI Technical Summary
Existing corrugated cardboard box corner reinforcement strips lack effective connection with the cardboard box, making it easy to tip over when filling goods, affecting the placement of items, and easily deformed upon external impact.
A corner sealing and protection cardboard box was designed. By installing L-shaped corner strips on the inner side wall of the box, and adding a base, fixing groove and fixing device, combined with a cushioning component and magnetic structure, the stability and cushioning capacity of the corner are enhanced. At the same time, the stability and waterproofness of the overall structure are improved by using support strips and reinforcing strips.
It effectively prevents corner strips from tipping over, reduces impact deformation, enhances the strength and stability of carton corners, prevents moisture erosion, and improves filling efficiency and overall structural durability.
Smart Images

Figure CN224278001U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of cardboard box technology, specifically a cardboard box with corner sealing and protection. Background Technology
[0002] Cardboard boxes are the most widely used packaging products, used to package and protect goods. They are commonly used in logistics, moving, food, electronics, and pharmaceutical industries. The most common type is the corrugated cardboard box, which is made of multiple layers of cardboard with corrugated cardboard sandwiched in the middle.
[0003] Existing corrugated cardboard boxes are typically made into boxes of various sizes and shapes through folding, gluing, nailing, or other methods. Corrugated cardboard boxes all contain corner structures. To improve the strength of the corners, reinforcing corner strips are placed at the inner corners of the cardboard box to protect and reinforce the corners, reducing the possibility of deformation due to pressure or impact. However, during long-term use and observation, it was found that the existing reinforcing corner strips are only placed at the corners inside the cardboard box. The lack of connection between the reinforcing corner strips and the cardboard box can cause the corner strips to tip over when items are placed inside, affecting the placement of items into the box.
[0004] Therefore, this utility model provides a cardboard box with corner sealing protection. Utility Model Content
[0005] To overcome the shortcomings of the existing technology and solve at least one of the problems mentioned in the background technology, a corner sealing and protection cardboard box is proposed.
[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: A corner sealing and protection cardboard box of this utility model includes a box body; multiple corner strips are installed on the inner side wall of the box body; the corner strips are located at the corners of the box body; the corner strips have an L-shaped structure; a base is fixedly connected to the bottom of the corner strips; a fixing groove is opened at the bottom of the base; multiple fixing devices are fixedly connected to the bottom of the inner side of the box body; the fixing grooves and fixing devices are correspondingly arranged; the fixing devices have a cross-shaped structure; a box cover is connected to the top of the box body; a buffer component is provided on the top of the corner strips; through the above structure, the corner strips are set with the base and fixing grooves, and the fixing devices are used in conjunction, so as to improve the strength of the corner of the box body by fixing the corner strips at the inner corner of the box body, thereby reducing the deformation of the box body when subjected to external impact, and at the same time improving the stability of the corner strip position, thereby reducing the situation where the corner strips are simply placed inside the box in the traditional method, which causes the corner strips to tip over when loading goods, thus affecting the loading of goods.
[0007] Preferably, the buffer assembly includes a fixed plate; the fixed plate is fixedly connected to the top of the corner strip; a pair of sleeves are fixedly connected to the top of the fixed plate; a sliding rod is slidably connected inside the sleeve; a buffer plate is fixedly connected to the top of the sliding rod; a pair of first magnets are fixedly connected to the top of the fixed plate; a pair of second magnets are fixedly connected to the bottom of the buffer plate; the first magnets and second magnets have a repulsive structure; with the above structure, the fixed plate, sleeves and buffer plate are set, and the first magnets and second magnets are used in conjunction, the repulsive effect of the first magnets and second magnets can generate a buffering force when an external object hits the corner position from the top of the box, so as to reduce the deformation of the corner caused by the impact.
[0008] Preferably, multiple sets of support strips are fixed to the inner side wall of the box; each set of support strips consists of two strips; the support strips are in close contact with the side wall of the corner strips; and the side wall of the support strips is provided with multiple ventilation holes. Through the above structure, the support strips and ventilation holes can absorb moisture inside the box by filling the support strips with desiccant, thereby reducing the possibility of the box structure softening due to moisture inside the box and easily deforming.
[0009] Preferably, the support strip has a retaining strip fixed to its side wall; both the corner strip and the base side wall have slots; the retaining strip and the slot are slidably engaged; with the above structure, the retaining strip and the slot can be engaged to improve the stability of the corner strip's position inside the housing.
[0010] Preferably, each of the two adjacent support strip sidewalls is fixed with a plurality of reinforcing strips; the plurality of reinforcing strips are evenly distributed on the support strip sidewalls; with the above structure, the reinforcing strips can provide support and reinforcement from the inner wall of the box, thereby improving the stability of the inner wall structure of the box and reducing the deformation or damage caused by external impacts on the box surface.
[0011] Preferably, a pair of supports are fixed to the bottom of the box; the pair of supports are symmetrical; the supports are L-shaped; by setting the supports to connect the box through the above structure, the gap between the box and the ground can be maintained, which can reduce the entry of ground moisture into the box from the bottom of the box, and at the same time improve the stability of the box position when stacked.
[0012] The beneficial effects of this utility model are as follows:
[0013] 1. The corner sealing and protection cardboard box of this utility model, by setting corner strips, bases and fixing grooves, and using a fixing device, can fix the corner strips at the inner corner of the box body to improve the strength of the corner of the box body, thereby reducing the deformation of the box body when subjected to external impact. At the same time, it can improve the stability of the corner strip position, thereby reducing the situation where the corner strips are simply placed inside the box in the traditional method, which may cause the corner strips to tip over when loading goods, thus affecting the loading of goods.
[0014] 2. The corner sealing and protection cardboard box of this utility model, by setting a fixing plate, a sleeve and a buffer plate, and using a first magnet and a second magnet in combination, can generate a buffering force when an external object hits the corner position from the top of the box through the repulsive effect of the first magnet and the second magnet, so as to reduce the deformation of the corner caused by the impact. Attached Figure Description
[0015] The present invention will be further described below with reference to the accompanying drawings.
[0016] Figure 1 This is a perspective view of the present invention;
[0017] Figure 2 This is a schematic diagram of the cooperative structure between the corner strip and the support strip in this utility model;
[0018] Figure 3 This is a schematic diagram of the cooperation structure between the base and the fixing device in this utility model;
[0019] Figure 4 This is a schematic diagram of the cooperative structure of the buffer plate and the fixing plate in this utility model.
[0020] Legend:
[0021] 1. Box body; 11. Corner strip; 12. Base; 13. Fixing groove; 14. Fixing device; 15. Box cover; 2. Fixing plate; 21. Sleeve; 22. Slide rod; 23. Buffer plate; 24. First magnet; 25. Second magnet; 3. Support bar; 31. Vent hole; 4. Locking strip; 41. Slot; 5. Reinforcing strip; 6. Support. Detailed Implementation
[0022] 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 skilled in the art without creative effort are within the protection scope of the present utility model.
[0023] Specific implementation examples are given below.
[0024] like Figures 1 to 3As shown in the embodiment of this utility model, a corner sealing and protection cardboard box includes a box body 1; multiple corner strips 11 are installed on the inner side wall of the box body 1; the corner strips 11 are located at the corners of the box body 1; the corner strips 11 have an L-shaped structure; a base 12 is fixedly connected to the bottom of the corner strips 11; a fixing groove 13 is provided at the bottom of the base 12; multiple fasteners 14 are fixedly connected to the bottom inner side of the box body 1; the fixing groove 13 and the fasteners 14 are correspondingly arranged; the fasteners 14 have a cross-shaped structure; a box cover 15 is connected to the top of the box body 1; a buffer assembly is provided at the top of the corner strips 11; during operation, the fixing groove 13 at the bottom of the base 12 is aligned with the fasteners 14 at the bottom of the box body 1, and then the fasteners 14 are inserted into the fixing groove 13. At this time, the fasteners 14 and the fixing groove 13 are aligned. The U-shaped structure can fix the position of the corner strip 11, thereby fixing the corner strip 11 at the inner corner of the box body 1. After all four corner strips 11 are fixed, the box body 1 can be reinforced from the four inner corners. Then, the goods are placed in the inner space enclosed by the corner strips 11, and the box lid 15 is closed on the top of the box body 1. Through the above structure, the corner strip 11 is set with the base 12 and the fixing groove 13, and the fixing device 14 is used in conjunction. By fixing the corner strip 11 at the inner corner of the box body 1, the strength of the corner of the box body 1 is improved, so as to reduce the deformation of the box body 1 when it is subjected to external impact. At the same time, the stability of the corner strip 11 position is improved, so as to reduce the situation where the corner strip 11 is simply placed inside the box body 1 in the traditional way, which causes the corner strip 11 to tip over when loading goods, thus affecting the loading of goods.
[0025] like Figure 4 As shown, the buffer assembly includes a fixed plate 2; the fixed plate 2 is fixed to the top of the corner strip 11; a pair of sleeves 21 are fixed to the top of the fixed plate 2; a sliding rod 22 is slidably connected inside the sleeves 21; a buffer plate 23 is fixed to the top of the sliding rod 22; a pair of first magnets 24 are fixed to the top of the fixed plate 2; a pair of second magnets 25 are fixed to the bottom of the buffer plate 23; the first magnets 24 and the second magnets 25 have a repulsive structure; during operation, when the corner strip 11 is fixed at the inner corner position of the housing 1, the buffer plate 23 is horizontal with the top of the inner side of the housing 1. When an external object impacts the corner from the top of the housing 1... When positioned, the buffer plate 23 will move downward and the slide rod 22 will slide downward within the sleeve 21. At the same time, the second magnet 25 and the first magnet 24 will move closer to each other. At this time, the repulsive structure between the second magnet 25 and the first magnet 24 will generate a repulsive force, thereby generating a buffering force. Through the above structure, the fixed plate 2, the sleeve 21 and the buffer plate 23 are set up, and the first magnet 24 and the second magnet 25 are used in conjunction. Through the repulsive action of the first magnet 24 and the second magnet 25, a buffering force can be generated when an external object hits the corner position from the top of the box 1, so as to reduce the deformation of the corner caused by the impact.
[0026] like Figure 1 and Figure 2 As shown, multiple sets of support strips 3 are fixed to the inner sidewall of the box 1; each set of support strips 3 consists of two strips; the support strips 3 are in close contact with the sidewall of the corner strip 11; the sidewall of the support strips 3 is provided with multiple ventilation holes 31; during operation, desiccant can be placed in the cavity inside the support strips 3, at which time the moisture inside the box 1 will enter the support strips 3 through the ventilation holes 31 and be absorbed by the desiccant. Through the above structure, by setting the support strips 3 and the ventilation holes 31, the moisture inside the box 1 can be absorbed by filling the support strips 3 with desiccant, thereby reducing the situation where the structure of the box 1 softens due to the moisture inside the box 1 and is prone to deformation.
[0027] like Figure 2 As shown, a retaining strip 4 is fixedly connected to the side wall of the support strip 3; slots 41 are provided on the side walls of the corner strip 11 and the base 12; the retaining strip 4 and the slot 41 are slidably engaged; during operation, when the corner strip 11 and the base 12 are inserted into the housing 1, the slot 41 and the retaining strip 4 are aligned and then the corner strip 11 is inserted. At this time, the retaining strip 4 is inserted into the slot 41 and can be fixed to the corner strip 11 from both sides. Through the above structure, the retaining strip 4 and the slot 41 are set, and the stability of the corner strip 11 in the housing 1 can be improved through the insertion and engagement of the retaining strip 4 and the slot 41.
[0028] like Figure 1 As shown, multiple reinforcing strips 5 are fixed to the side walls of two adjacent support strips 3; the multiple reinforcing strips 5 are evenly distributed on the side walls of the support strips 3; during operation, after the support strips 3 and reinforcing strips 5 are fixed inside the box 1, the reinforcing strips 5 are fixed to the inner wall of the box 1, which can support and reinforce the inner wall of the box 1. Through the above structure, the reinforcing strips 5 can support and reinforce from the inner wall of the box 1, thereby improving the stability of the inner wall structure of the box 1 and reducing the deformation or damage caused by external impact on the surface of the box 1.
[0029] like Figure 1 As shown, a pair of supports 6 are fixed to the bottom of the box 1; the pair of supports 6 are symmetrical; the supports 6 are L-shaped; during operation, when the box 1 is placed alone, the supports 6 are located at the bottom of the box 1, which will create a certain gap between the bottom of the box 1 and the ground, thereby reducing the entry of moisture from the ground into the box 1 from the bottom. When the boxes 1 are stacked, the supports 6 will be locked on the top of the box cover 15. Through the above structure, the supports 6 are set to connect the box 1, and by creating a gap between the box 1 and the ground, the entry of moisture from the ground into the box 1 from the bottom can be reduced, and the stability of the box 1 position can be improved when stacked.
[0030] like Figure 1As shown, the side walls of the box body 1 and the box cover 15 are coated with a waterproof layer. Through the above structure, a waterproof layer is set on the outside of the box body 1 and the box cover 15, which can block external water vapor and reduce the possibility of external water vapor entering the box body 1 and causing structural damage.
[0031] Working principle: Align the fixing groove 13 at the bottom of the base 12 with the fixing device 14 at the bottom of the box 1, and then insert the fixing device 14 into the fixing groove 13. At this time, the cross-shaped structure of the fixing device 14 and the fixing groove 13 can fix the position of the corner strip 11, thereby fixing the corner strip 11 at the inner corner position of the box 1. After all four corner strips 11 are fixed, they can be reinforced from the four inner corners inside the box 1. Then, place the goods in the internal space enclosed by the corner strips 11, and then close the box lid 15 on the top of the box 1. After the corner strips 11 are fixed at the inner corner position of the box 1, the buffer plate 23 is horizontal with the top of the inner side of the box 1. When an external object hits the corner position from the top of the box 1, it will cause the buffer plate 23 to move downward and the slide rod 22 to slide downward in the sleeve 21. At the same time, it will cause the second magnet 25 and the first magnet 24 to move closer to each other. At this time, the second magnet 25 and the first magnet 24 are closer together. The repulsive structure between magnets 24 generates a repulsive force, thus creating a buffering effect. Desiccant can be placed in the cavity inside the support strip 3. At this time, the moisture inside the box 1 will enter the support strip 3 through the vent 31 and be absorbed by the desiccant. When inserting the corner strip 11 and the base 12 into the box 1, align the slot 41 with the locking strip 4 and then insert the corner strip 11. At this time, the locking strip 4 is inserted into the slot 41 and can be fixed from both sides of the corner strip 11. After the support strip 3 and the reinforcing strip 5 are fixed inside the box 1, the reinforcing strip 5 is fixed to the inner wall of the box 1, which can support and reinforce the inner wall of the box 1. When the box 1 is placed alone, the support 6 is located at the bottom of the box 1, which will create a certain gap between the bottom of the box 1 and the ground, thereby reducing the moisture on the ground from entering the box 1 from the bottom of the box 1. When the boxes 1 are stacked, the support 6 will be locked on the top of the box cover 15.
[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A cardboard box with corner sealing protection, comprising a box body (1); characterized in that: Multiple corner strips (11) are installed on the inner side wall of the box (1); the corner strips (11) are located at the corner of the box (1); the corner strips (11) are L-shaped; a base (12) is fixed to the bottom of the corner strips (11); a fixing groove (13) is opened at the bottom of the base (12); multiple fasteners (14) are fixed to the bottom of the inner side of the box (1); the fixing groove (13) and the fasteners (14) are correspondingly arranged; the fasteners (14) are cross-shaped; a box cover (15) is connected to the top of the box (1); a buffer assembly is provided on the top of the corner strips (11).
2. A corner-sealed carton according to claim 1, characterized in that: The buffer assembly includes a fixing plate (2); the fixing plate (2) is fixed to the top of the corner strip (11); a pair of sleeves (21) are fixed to the top of the fixing plate (2); a sliding rod (22) is slidably connected inside the sleeve (21); a buffer plate (23) is fixed to the top of the sliding rod (22); a pair of first magnets (24) are fixed to the top of the fixing plate (2); a pair of second magnets (25) are fixed to the bottom of the buffer plate (23); the first magnets (24) and the second magnets (25) are repulsive structures.
3. A corner-sealed carton according to claim 1, characterized in that: The inner sidewall of the box (1) is fixed with multiple sets of support bars (3); each set of support bars (3) consists of two bars; the support bars (3) are in close contact with the sidewall of the corner bar (11); the sidewall of the support bars (3) is provided with multiple ventilation holes (31).
4. A corner-sealed carton according to claim 3, characterized in that: The support bar (3) has a retaining strip (4) fixedly connected to its side wall; the corner bar (11) and the base (12) both have slots (41) on their side walls; the retaining strip (4) and the slots (41) are slidably engaged.
5. A corner-sealed carton according to claim 3, characterized in that: Multiple reinforcing strips (5) are fixed to the side walls of two adjacent support strips (3); the multiple reinforcing strips (5) are evenly distributed on the side walls of the support strips (3).
6. A corner-sealed carton according to claim 1, characterized in that: The bottom of the box (1) is fixed with a pair of supports (6); the pair of supports (6) are symmetrical; the supports (6) are L-shaped.
7. A corner-sealed carton according to claim 1, characterized in that: The side walls of the box body (1) and the box cover (15) are both coated with a waterproof layer.