Concave paper tube

Abstract

The utility model discloses a concave paper tube which comprises an outer shell, the whole outer shell is arranged in a concave shape, a containing groove is reserved in the top of the outer shell, round corner parts are arranged at the positions, located on the two sides of the containing groove, of the top of the outer shell respectively, the outer shell is in a concave shape, and the unique structure can play an important role in the transportation process of electronic products. When products are packed and stacked, the concave-shaped structure enables pressure transmitted by goods on the upper portion to be more evenly dispersed to all parts of the outer shell, the pressure is prevented from acting on the electronic products in a concentrated mode, meanwhile, the two sets of deformable inner shells arranged inside are symmetrically inserted into the cavity and attached to the inner walls of the two sides, and when external extrusion force is borne, the inner shells are not prone to deformation. The deformable inner shell can deform within the shaping range of the deformable inner shell, pressure is further absorbed and dispersed, all-directional and multi-layer protection is provided for electronic products such as televisions and tablet personal computers inside the deformable inner shell, and the risk that the electronic products are damaged due to extrusion in the transportation process is greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of packaging materials technology, specifically a concave paper tube. Background Technology

[0002] In the logistics and transportation of electronic products, televisions, tablets, and other electronic products, due to their large size and fragile screens, place extremely high demands on packaging protection. Goods are typically stacked to fully utilize transportation space and reduce costs. However, as goods are stacked, the electronic products at the bottom experience increasing pressure from the goods above. This pressure can easily lead to deformation, screen breakage, and other damage, severely impacting product quality and sales, causing significant economic losses to manufacturers and distributors. Currently, foam is commonly used as a protective packaging material for electronic products. While foam has some cushioning properties and can mitigate the impact of external shocks to a certain extent, it is also brittle and easily damaged under pressure. Once damaged, the foam loses its original cushioning and protective properties, failing to provide effective protection for the electronic products and exposing them to the risk of damage during subsequent transportation. Therefore, we need to propose a concave paper tube. Summary of the Invention

[0003] The purpose of this invention is to provide a concave paper tube, which aims 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 concave paper tube includes an outer shell, which is generally U-shaped. A placement groove is pre-formed at the top of the outer shell, and rounded corners are provided on both sides of the top of the outer shell located at the placement groove. An internal cavity is provided within the outer shell, and two sets of deformable inner shells are symmetrically inserted into the cavity, with both sets of deformable inner shells fitting against the inner walls of the cavity. Preferably, the outer shell includes an outer layer, a core layer inside the outer layer, and an inner layer inside the core layer. The outer layer, core layer, and inner layer are fixedly bonded together with hot melt adhesive.

[0006] Preferably, the outer layer is made of kraft paper and the thickness of the outer layer is 0.5-0.8 mm.

[0007] Preferably, the core layer is made of sand tube paper, the flute height of the core layer is 2.5-3.5mm, and the number of flutes is 34-38 / 30cm.

[0008] Preferably, the inner layer is made of kraft paper, and the basis weight of the inner layer is 180-220 g / m².

[0009] Preferably, the cross-section of the placement groove is a symmetrical concave curve, and the inner bottom of the placement groove is provided with an array of anti-slip textures. Preferably, energy-absorbing grooves are respectively formed on the four side walls of the deformable inner shell, and all four sets of energy-absorbing grooves are semi-circularly concave.

[0010] Preferably, the bottom of the deformable inner shell is provided with two sets of limiting grooves, and the inner bottom of the cavity is fixedly connected with a limiting block that matches the limiting groove, and the limiting block is engaged inside the limiting groove.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. This utility model features a U-shaped outer shell, a unique structure that plays a crucial role in the transportation of electronic products. When products are packed and stacked, the U-shaped structure allows the pressure from the goods above to be more evenly distributed across the outer shell, preventing pressure concentration on the electronic products. Simultaneously, two sets of deformable inner shells are symmetrically inserted into the cavity and fit snugly against the inner walls on both sides. When subjected to external pressure, the deformable inner shells can deform within their plasticity, further absorbing and dispersing pressure. This provides comprehensive, multi-layered protection for the internal electronic products such as televisions and tablets, significantly reducing the risk of damage due to compression during transportation.

[0013] 2. Compared with traditional foam protective materials, the concave paper tube of this utility model is made of paper material, which also has good environmental protection performance. Paper material is easy to degrade and will not cause long-term pollution to the environment. It is in line with the current green and environmentally friendly development concept and helps to reduce the pressure of electronic product packaging waste on the environment. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a front view structural diagram of the present invention;

[0016] Figure 3 This is a structural schematic diagram of the deformable inner shell, the limiting groove, and the limiting block of this utility model;

[0017] Figure 4 This is a schematic diagram of the outer shell of this utility model.

[0018] In the diagram: 1. Outer shell; 101. Outer layer; 102. Core layer; 103. Inner layer; 2. Placement slot; 3. Rounded corner; 4. Cavity; 5. Deformable inner shell; 6. Energy absorption slot; 7. Limiting slot; 8. Limiting block. Detailed Implementation

[0019] 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.

[0020] Please see Figure 1-4 This utility model provides a technical solution:

[0021] A concave paper tube includes an outer shell 1, which is shaped like a concave U. A slot 2 is pre-formed at the top of the outer shell 1, into which the bezel of electronic products such as televisions and tablets can be inserted. Rounded corners 3 are provided on both sides of the top of the outer shell 1 on the sides of the slot 2. A cavity 4 is pre-formed inside the outer shell 1, and two sets of deformable inner shells 5 are symmetrically inserted into the cavity 4, with both sets of deformable inner shells 5 fitting against the inner walls of the cavity 4. The outer shell 1 is shaped like a concave U. The U-shaped design plays a crucial role in the transportation of electronic products. When products are packed and stacked, the U-shape allows the pressure from the goods above to be more evenly distributed across the outer casing 1, preventing pressure concentration on the electronic products. Simultaneously, the two sets of deformable inner shells 5 are symmetrically inserted into the cavity 4 and fitted against the inner walls on both sides. When subjected to external pressure, the deformable inner shells 5 can deform within their plasticity, further absorbing and dispersing pressure on the internal components such as televisions and tablets. The sub-product provides comprehensive, multi-layered protection, significantly reducing the risk of electronic products being damaged by compression during transportation. The outer casing 1 includes an outer layer 101, a core layer 102 inside the outer layer 101, and an inner layer 103 inside the core layer 102. The outer layer 101, core layer 102, and inner layer 103 are bonded together with hot melt adhesive. This multi-layered composite structure not only improves the overall strength and stability of the outer casing 1, but also provides a simple and efficient method of bonding the layers with hot melt adhesive, facilitating paper tube production and improving production efficiency. This improves efficiency and reduces production costs. At the same time, the combination of different material layers can leverage their respective advantages to provide better performance for the paper tube. The outer layer 101 is made of kraft paper with a thickness of 0.5-0.8mm. Kraft paper has high strength and abrasion resistance, which can effectively protect the internal structure and electronic products and prevent the paper tube from being scratched and worn by external objects during transportation. The appropriate thickness ensures the strength of the paper tube without making it too bulky, making it easy to handle and stack, while also meeting the requirements of environmental protection and cost control.

[0022] The core layer 102 is made of sand tube paper. The flute height of the core layer 102 is 2.5-3.5mm, and the number of flutes is 34-38 / 30cm. The sand tube paper structure has good cushioning performance and can further enhance the paper tube's resistance to compression. The reasonable setting of flute height and number of flutes ensures that the core layer 102 has good strength and stability while ensuring cushioning performance. It can effectively absorb and disperse external pressure and provide reliable protection for internal electronic products.

[0023] The inner layer 103 is made of kraft paper with a basis weight of 180-220 g / m². Kraft paper has high strength and stiffness, which can provide internal support for the paper tube and ensure the stability of the paper tube's shape. The appropriate basis weight allows the inner layer 103 to provide sufficient support without adding too much weight, which helps maintain the overall performance of the paper tube and ensures the safety of electronic products inside the paper tube. The cross-section of the placement slot 2 is a symmetrical concave curve, and the bottom of the placement slot 2 is provided with an anti-slip texture array. The symmetrical concave curve design can better fit the shape of the electronic product, further enhancing the stability of the product placement. The anti-slip texture array can effectively prevent the electronic product from shifting due to shaking during transportation, avoid damage caused by collision, and ensure that the electronic product always remains stable inside the paper tube.

[0024] The deformable inner shell 5 has energy-absorbing grooves 6 on its four side walls. The four sets of energy-absorbing grooves 6 are all semi-circular and concave. When the paper tube is subjected to impact forces from different directions, the energy-absorbing grooves 6 can deform and absorb some energy, further enhancing the buffering performance of the deformable inner shell 5. This all-round buffering design ensures that electronic products can be effectively protected from squeezing or collisions from any direction during transportation, greatly improving the protective capability of the paper tube. The bottom of the deformable inner shell 5 has two sets of limiting grooves 7. The bottom of the cavity 4 is fixedly connected to a limiting block 8 that matches the limiting groove 7. The limiting block 8 is engaged inside the limiting groove 7. This limiting design makes the position of the deformable inner shell 5 more stable in the cavity 4, preventing displacement due to shaking during transportation, ensuring that the deformable inner shell 5 can always play an effective buffering and protective role, and ensuring the stability and reliability of the overall performance of the paper tube.

[0025] When protecting electronic products during transportation, the concave paper tube primarily relies on the synergistic effect of its various structures. When the paper tube is subjected to external pressure during transportation, the concave structure of the outer shell 1 first disperses the pressure, ensuring that the pressure is evenly transmitted to the interior. The deformable inner shell 5 deforms within its plasticity range, absorbing and dispersing the pressure. Simultaneously, the energy-absorbing grooves 6 on its sidewalls further absorb energy, enhancing the cushioning effect. The symmetrical concave curves and anti-slip texture array of the placement groove 2 ensure that the electronic product is stably placed inside the paper tube, preventing damage due to shaking. The limiting groove 7 at the bottom of the deformable inner shell 5 engages with the limiting block 8 at the bottom of the cavity 4, ensuring the stability of the deformable inner shell 5 and maintaining its cushioning effect. The kraft paper of the outer layer 101 prevents scratches and wear, the sandpaper core of the core layer 102 provides cushioning, and the kraft paper of the inner layer 103 ensures the stability of the paper tube shape. All layers work together to provide comprehensive and multi-layered protection for the electronic product, ensuring its safety during transportation. 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. A concave paper tube comprising an outer shell (1), characterized in that: The whole outer shell (1) is concave, the top of the outer shell (1) is provided with a placing groove (2), the top of the outer shell (1) is provided with a rounded corner (3) on both sides of the placing groove (2), the inner part of the outer shell (1) is provided with a cavity (4), the cavity (4) is provided with two groups of deformable inner shells (5), the two groups of deformable inner shells (5) are symmetrically inserted into the cavity (4), and the two groups of deformable inner shells (5) are attached to the inner walls of the cavity (4).

2. A recessed paper tube according to claim 1, characterized in that: The outer shell (1) comprises an outer layer (101), the inner side of the outer layer (101) is provided with a core layer (102), the inner side of the core layer (102) is provided with an inner layer (103), and the outer layer (101), the core layer (102) and the inner layer (103) are fixedly bonded by hot melt adhesive.

3. A recessed paper tube according to claim 2, wherein: The material of the outer layer (101) is kraft paper, and the thickness of the outer layer (101) is 0.5-0.8mm.

4. A recessed paper tube according to claim 3, wherein: The material of the core layer (102) is sand pipe paper core, the corrugation height of the core layer (102) is 2.5-3.5mm, and the corrugation number is 34-38 corrugations / 30cm.

5. A recessed paper tube according to claim 4, wherein: The inner layer (103) is set as kraft paper, and the basis weight of the inner layer (103) is 180-220g / m².

6. A recessed paper tube according to claim 1, wherein: The cross section of the placing groove (2) is symmetrically concave curve, and the inner bottom of the placing groove (2) is provided with an anti-skid line array.

7. A recessed paper tube as defined in claim 1, wherein: Four groups of energy absorption grooves (6) are formed in the four side walls of the deformable inner shell (5), and the four groups of energy absorption grooves (6) are semicircular concave.

8. A recessed paper tube according to claim 1, wherein: Two groups of limiting grooves (7) are formed in the bottom of the deformable inner shell (5), the inner bottom of the cavity (4) is fixedly connected with a limiting block (8) matched with the limiting groove (7), and the limiting block (8) is clamped in the inner part of the limiting groove (7).

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