Frangible product thickened protection packaging box
By introducing a double-line cushioning structure, two-way self-locking buckles, an array of vents, and a composite reinforcement structure into the packaging box, the problems of insufficient cushioning, poor sealing, poor breathability, and dust protection of traditional packaging boxes are solved, achieving all-round protection for fragile items.
Patent Information
- Application Number
- CN202520614009.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-02
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-04-02
AI Technical Summary
Traditional packaging boxes lack sufficient cushioning, have poor sealing, poor breathability and dust protection, and low structural strength, making them unable to effectively protect fragile items.
The packaging box was designed with a double-line cushioning structure, a two-way self-locking buckle, an array of vents, and a composite reinforcement structure. It is filled with elastic particles and covered with a composite functional coating.
It enhances cushioning protection, improves sealing and safety, optimizes breathability and dustproof performance, increases structural strength, and extends service life.
Smart Images
Figure CN223891575U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of packaging technology, specifically to a thickened protective packaging box for fragile items. Background Technology
[0002] Fragile items are highly susceptible to damage during transportation and storage, thus requiring specially designed packaging boxes to provide effective protection. Traditional packaging boxes typically employ simple structural designs, such as boxes made of single-layer cardboard or plastic. While these materials offer a degree of physical protection, they are often insufficient to withstand the vibrations, impacts, and environmental changes that can occur during transportation for fragile items.
[0003] The shortcomings of existing technology:
[0004] 1. Insufficient cushioning performance: Traditional packaging boxes lack effective cushioning structures and cannot effectively absorb external impacts, thus offering limited protection for high-value, fragile items.
[0005] 2. Poor sealing: Many packaging boxes do not have a good self-locking mechanism when closed, and can easily be accidentally opened during transportation, resulting in damage to the contents.
[0006] 3. Poor breathability and dustproofness: Some packaging boxes sacrifice breathability to enhance protection, or although they have ventilation holes, they do not have dustproof measures, which leads to the accumulation of internal moisture or the entry of dust, affecting product quality.
[0007] 4. Low structural strength: Ordinary packaging boxes are prone to deformation or even breakage when faced with external pressure, especially when stacked, the bottom of the packaging box bears greater pressure, increasing the risk of damage to fragile items.
[0008] Therefore, existing technologies have shortcomings and need further improvement. Utility Model Content
[0009] In view of the problems existing in the prior art, this utility model provides a thickened protective packaging box for fragile items.
[0010] To achieve the above objectives, the specific solution of this utility model is as follows:
[0011] This utility model provides a thickened protective packaging box for fragile items, including a box body and a box lid:
[0012] The height ratio of the side of the box body to the side of the box lid is 1:0.8-1:1.2;
[0013] The sides of both the box body and the lid are provided with a double-line buffer structure.
[0014] The dual-line buffer structure consists of two parallel and spaced-apart raised buffer lines. The cross-section of the raised buffer line is wavy, with a wave height of 3-10 mm and a wavelength of 2-5 times the wave height.
[0015] The outer side of the double-line buffer structure forms an inclined surface with an angle of 40°-50° with the outer surface of the box body and the lid, and the inner side forms a cavity buffer layer continuously distributed along the extension direction of the raised buffer line between it and the inner surface of the box body and the lid.
[0016] Furthermore, the cavity buffer layer is filled with elastic particles, which are EPE pearl cotton balls or polyurethane foam particles with a diameter of 1-2 mm, the filling volume ratio is 40%-60% and the resilience rate is ≥70%, and the test is conducted according to ASTM D3574 standard.
[0017] The surface of the elastic particles is coated with a hydrophobic coating with a thickness of 0.01-0.03 mm.
[0018] Furthermore, the opening and closing joints of the box body and the lid are provided with a two-way self-locking latch structure, including:
[0019] A trapezoidal slot is provided on the side of the box body at a distance of 5-8mm from the opening end. The inner wall of the trapezoidal slot is provided with TPU elastic protrusions with a Shore hardness of 50-70 degrees.
[0020] A buckle protrusion is provided on the side of the box lid. The end of the buckle protrusion is provided with a groove that matches the elastic protrusion. The length of the buckle protrusion is 0.5-1mm less than the depth of the trapezoidal groove. When the buckle protrusion is inserted into the trapezoidal groove, the elastic protrusion is embedded in the groove to form a two-way lock.
[0021] Furthermore, the outer side surface of the box body and the box cover is provided with an array of vent holes, and the ratio of the diameter of the vent holes to the thickness of the board material in the area is 1:3-1:5.
[0022] The distribution density of the vent holes is 4-6 per cm² at the top of the lid and the bottom of the box, and 6-8 per cm² at the side.
[0023] The inner wall of the vent is provided with a dustproof filter membrane with a filtration accuracy of 50-100μm.
[0024] Furthermore, the inner surfaces of the box body and the box lid are provided with a composite reinforcement structure, including:
[0025] The first layer consists of hexagonal honeycomb reinforcing ribs with a side length of 10-20mm.
[0026] The second layer of radial reinforcing ribs has its radial center located within 5mm of the center point of the bottom surface of the box, with a spacing of 1.2-1.5 times the side length of the honeycomb, and intersects with the honeycomb reinforcing ribs to form a compressive strength grid;
[0027] The height of the reinforcing rib is 1.5-2 times the thickness of the plate.
[0028] Furthermore, the outer surfaces of the box body and the lid are covered with a composite functional coating, including:
[0029] The bottom layer is a 0.1-0.2mm thick polyurethane waterproof layer;
[0030] The middle layer is an antistatic layer with a thickness of 0.1-0.3mm, and the surface resistance is ≤10 Ω according to ISO 1853 standard. 6 Ω;
[0031] The outer layer is a printable matte abrasion-resistant layer, with an abrasion resistance rating of ≥H according to ASTM D4060 standard;
[0032] The adhesion between each coating is ≥3B according to ASTM D3359 standard.
[0033] The technical solution of this utility model has the following beneficial effects:
[0034] 1. Enhanced Cushioning Protection: The double-line cushioning structure, especially the wavy raised cushioning line, effectively absorbs and disperses external impact forces, reducing the risk of damage to fragile items during transportation. The hollow cushioning layer is filled with highly resilient elastic particles, further enhancing this cushioning effect.
[0035] 2. Improved sealing and security: The two-way self-locking buckle structure not only ensures a tight connection between the box body and the lid, preventing accidental opening, but also the TPU elastic protrusions increase additional friction and locking stability, providing a higher level of security for the packaging.
[0036] 3. Optimized breathability and dustproof performance: The design of the air pore array and the application of its internal dustproof filter membrane ensure air circulation inside the packaging while effectively preventing dust from entering and maintaining the cleanliness of the internal environment, making it particularly suitable for environmentally sensitive products.
[0037] 4. Enhanced structural strength: The composite reinforced structure (hexagonal honeycomb reinforcing ribs combined with radial reinforcing ribs) significantly improves the overall compressive strength of the packaging box, making it less prone to deformation or damage even under heavy pressure, thus improving load-bearing capacity and durability.
[0038] 5. Multifunctional surface coating: The composite functional coating covering the outer surface gives the packaging box multiple properties such as waterproof, antistatic and wear-resistant. It not only protects the packaging from the impact of the external environment, but also extends its service life. In addition, the printable matte wear-resistant outer layer facilitates the display of brand logos and information. Attached Figure Description
[0039] Figure 1This is a top-view perspective view of the packaging box of this utility model in its open state.
[0040] Figure 2 This is a perspective view of the packaging box of this utility model from a downward angle when the box is open.
[0041] Figure 3 This is a schematic diagram of the double-line buffer structure of this utility model.
[0042] In the picture:
[0043] 1. Box body; 2. Box lid; 3. Double-line cushioning structure. Detailed Implementation
[0044] The present invention 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 invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.
[0045] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0046] In this invention, unless otherwise explicitly 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.
[0047] In the description of this embodiment, the terms "upper," "lower," "front," "rear," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not 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 utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0048] Combination Figures 1-3 As shown, this utility model provides a thickened protective packaging box for fragile items, including a box body 1 and a box lid 2;
[0049] The height ratio of the side of the box body 1 to the side of the box lid 2 is 1:0.8-1:1.2;
[0050] Both the box body 1 and the box lid 2 are provided with double-line buffer structures 3 on their sides;
[0051] The dual-line buffer structure 3 consists of two parallel and spaced-apart raised buffer lines. The cross-section of the raised buffer line is wavy, with a wave height of 3-10 mm and a wavelength of 2-5 times the wave height.
[0052] The outer side of the double-line buffer structure 3 forms an inclined surface with an angle of 40°-50° with the outer surfaces of the box body 1 and the box cover 2, and the inner side forms a cavity buffer layer continuously distributed along the extension direction of the raised buffer line between it and the inner surface of the box body 1 and the box cover 2.
[0053] The cavity buffer layer is filled with elastic particles, which are EPE pearl cotton balls or polyurethane foam particles with a diameter of 1-2mm. The filling volume ratio is 40%-60% and the resilience is ≥70%, as tested according to ASTM D3574 standard.
[0054] The surface of the elastic particles is coated with a hydrophobic coating with a thickness of 0.01-0.03 mm.
[0055] The opening and closing joints of the box body 1 and the box lid 2 are equipped with a two-way self-locking buckle structure, including:
[0056] A trapezoidal slot is provided on the side of the box body 1 at a distance of 5-8mm from the opening end, and the inner wall of the trapezoidal slot is provided with TPU elastic protrusions with a Shore hardness of 50-70 degrees.
[0057] A buckle protrusion is provided on the side of the lid 2. The end of the buckle protrusion is provided with a groove that matches the elastic protrusion. The length of the buckle protrusion is 0.5-1mm less than the depth of the trapezoidal groove. When the buckle protrusion is inserted into the trapezoidal groove, the elastic protrusion is embedded in the groove to form a two-way lock.
[0058] The outer side surfaces of the box body 1 and the box cover 2 are provided with an array of ventilation holes, and the ratio of the diameter of the ventilation holes to the thickness of the board in the area is 1:3-1:5.
[0059] The distribution density of the vent holes is 4-6 per cm² at the top of the lid 2 and the bottom of the body 1, and 6-8 per cm² on the side.
[0060] The inner wall of the vent is provided with a dustproof filter membrane with a filtration accuracy of 50-100μm.
[0061] The inner surfaces of the box body 1 and the box lid 2 are provided with a composite reinforcement structure, including:
[0062] The first layer consists of hexagonal honeycomb reinforcing ribs with a side length of 10-20mm.
[0063] The second layer of radial reinforcing ribs has its radial center located within 5mm of the center point of the bottom surface of box 1, with a spacing of 1.2-1.5 times the side length of the honeycomb, and intersects with the honeycomb reinforcing ribs to form a compressive strength grid;
[0064] The height of the reinforcing rib is 1.5-2 times the thickness of the plate.
[0065] The outer surfaces of the box body 1 and the box lid 2 are covered with a composite functional coating, including:
[0066] The bottom layer is a 0.1-0.2mm thick polyurethane waterproof layer;
[0067] The middle layer is an antistatic layer with a thickness of 0.1-0.3mm, and the surface resistance is ≤10 Ω according to ISO 1853 standard. 6 Ω;
[0068] The outer layer is a printable matte abrasion-resistant layer, with an abrasion resistance rating of ≥H according to ASTM D4060 standard;
[0069] The adhesion between each coating is ≥3B according to ASTM D3359 standard.
[0070] The principle of this utility model is as follows:
[0071] Dual-line buffer structure 3:
[0072] The packaging box body 1 and lid 2 are equipped with a double-line cushioning structure 3 on their sides. These structures consist of two wavy, raised cushioning lines that effectively absorb and disperse external impact forces. The wavy design increases the cushioning area, while the hollow cushioning layer between the cushioning lines further enhances this effect.
[0073] The cavity buffer layer is filled with elastic materials such as EPE pearl cotton balls or polyurethane foam particles. These particles have a high resilience (≥70%), which can deform under pressure and quickly return to their original shape, thereby effectively reducing the impact force transmitted to fragile items. The application of a hydrophobic coating also prevents moisture from entering between the particles, maintaining its performance stability.
[0074] Two-way self-locking buckle structure:
[0075] The opening and closing joints of the box body 1 and the lid 2 feature a two-way self-locking buckle design, ensuring that the packaging box will not be accidentally opened during transportation. The TPU elastic protrusions inside the trapezoidal slot cooperate with the grooves at the ends of the buckle protrusions to form a tight lock when inserted, improving the security and sealing of the packaging.
[0076] Ventilation pore array and dust filter membrane:
[0077] The packaging box features an array of ventilation holes on the side, allowing air circulation to prevent internal moisture buildup and keeping external dust out. A dust filter membrane on the inner wall of the ventilation holes further ensures air exchange while preventing the intrusion of fine particles, maintaining a clean internal environment.
[0078] Composite reinforced structure:
[0079] The inner surface features a design combining hexagonal honeycomb reinforcing ribs with radial reinforcing ribs, forming a robust, pressure-resistant mesh. This structure not only enhances the overall strength and pressure resistance of the packaging box but also effectively resists external pressure and impacts, providing more reliable protection for fragile items.
[0080] Composite functional coating:
[0081] The outer surface is covered with a composite functional coating consisting of three layers: waterproof, antistatic, and abrasion-resistant, each addressing different protection needs. The bottom polyurethane waterproof layer prevents moisture penetration; the middle antistatic layer reduces the risk of static electricity buildup; and the outer matte abrasion-resistant layer enhances the durability and aesthetics of the packaging box, while also facilitating the printing of brand information or product descriptions.
[0082] In summary, this utility model, by integrating multiple innovative designs and technical means, improves the protective effectiveness of the packaging box from multiple perspectives, ensuring that fragile items receive optimal protection during transportation and storage.
[0083] The above description is only a preferred embodiment of the present utility model and does not limit the scope of the present utility model. All equivalent structural transformations made under the present utility model concept and based on the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the protection scope of the present utility model.
Claims
1. A thickened protective packaging box for fragile items, comprising a box body and a box lid, characterized in that: The height ratio of the side of the box body to the side of the box lid is 1:0.8-1:1.2; The sides of both the box body and the lid are provided with a double-line buffer structure. The dual-line buffer structure consists of two parallel and spaced-apart raised buffer lines. The cross-section of the raised buffer line is wavy, with a wave height of 3-10 mm and a wavelength of 2-5 times the wave height. The outer side of the double-line buffer structure forms an inclined surface with an angle of 40°-50° with the outer surface of the box body and the lid, and the inner side forms a cavity buffer layer continuously distributed along the extension direction of the raised buffer line between it and the inner surface of the box body and the lid.
2. The packaging box according to claim 1, characterized in that: The cavity buffer layer is filled with elastic particles, which are EPE pearl cotton balls or polyurethane foam particles with a diameter of 1-2mm. The filling volume ratio is 40%-60% and the resilience is ≥70%, as tested according to ASTM D3574 standard. The surface of the elastic particles is coated with a hydrophobic coating with a thickness of 0.01-0.03 mm.
3. The packaging box according to claim 1, characterized in that: The opening and closing joints of the box body and lid are equipped with a two-way self-locking buckle structure, including: A trapezoidal slot is provided on the side of the box body at a distance of 5-8mm from the opening end. The inner wall of the trapezoidal slot is provided with TPU elastic protrusions with a Shore hardness of 50-70 degrees. A buckle protrusion is provided on the side of the box lid. The end of the buckle protrusion is provided with a groove that matches the elastic protrusion. The length of the buckle protrusion is 0.5-1mm less than the depth of the trapezoidal groove. When the buckle protrusion is inserted into the trapezoidal groove, the elastic protrusion is embedded in the groove to form a two-way lock.
4. The packaging box according to claim 1, characterized in that: The outer side surface of the box body and the box cover is provided with an array of vent holes, and the ratio of the diameter of the vent holes to the thickness of the board in the area is 1:3-1:
5. The distribution density of the vent holes is 4-6 per cm² at the top of the lid and the bottom of the box, and 6-8 per cm² at the side. The inner wall of the vent is provided with a dustproof filter membrane with a filtration accuracy of 50-100μm.
5. The packaging box according to claim 1, characterized in that: The inner surfaces of the box body and the box lid are provided with a composite reinforcement structure, including: The first layer consists of hexagonal honeycomb reinforcing ribs with a side length of 10-20mm. The second layer of radial reinforcing ribs has its radial center located within 5mm of the center point of the bottom surface of the box, with a spacing of 1.2-1.5 times the side length of the honeycomb, and intersects with the honeycomb reinforcing ribs to form a compressive strength grid; The height of the reinforcing rib is 1.5-2 times the thickness of the plate.
6. The packaging box according to claim 1, characterized in that: The outer surfaces of the box body and lid are covered with a composite functional coating, including: The bottom layer is a 0.1-0.2mm thick polyurethane waterproof layer; The middle layer is an antistatic layer with a thickness of 0.1-0.3mm, and the surface resistance is ≤10 Ω according to ISO 1853 standard. 6 Ω; The outer layer is a printable matte abrasion-resistant layer, with an abrasion resistance rating of ≥H according to ASTM D4060 standard; The adhesion between each coating is ≥3B according to ASTM D3359 standard.