A shock resistant foam packaging box

Abstract

The utility model discloses an anti -impact's foam packing carton, including the box body made of foam, the box body is the cuboid, the top corner of box body is covered with the protection angle, the protection angle includes three aprons, two aprons are used for with the side surface of box body is consistent, another apron is used for with the lower end surface or upper end surface of box body is consistent, the inner angle that three aprons surround forms is consistent with the top corner, the side of apron inwards is provided with the clamping piece, the outer surface of box body is provided with the clamping groove with clamping piece one to one corresponds, clamping piece and clamping groove clamping cooperation, the advantage is to the structure reinforcing effect of top corner part is better.

Description

Technical Field

[0001] This utility model belongs to the field of packaging protection technology, and in particular relates to an impact-resistant foam packaging box. Background Technology

[0002] Foam packaging boxes are a common means of protecting fragile items and precision electronic products from damage during logistics and transportation. Their protective mechanism lies in the large number of compressible pores inside the foam. When subjected to external impact, the foam undergoes a series of processes such as elastic deformation, plastic yielding, and even crushing to prolong the impact load duration, dissipate and absorb impact kinetic energy, and ultimately reduce the peak impact force transmitted to the contents, thus achieving the purpose of cushioning protection.

[0003] Conventional foam packaging boxes typically employ a rectangular structure with simple manufacturing processes and high space utilization. Their design is based on ideal vertical drop conditions. However, in actual logistics, impact postures are complex and varied. In particular, when the top corner of the box is impacted, the impact energy concentrates in a very small contact area, causing the stress in that area to rise sharply, far exceeding the yield strength of the foam material itself, ultimately leading to crushing. To alleviate this problem, the current common practice is to design the top corners of the packaging box with rounded corners. By increasing the radius of curvature at the top corners, impact stress can be dispersed to some extent, increasing the yield strength of the local area. However, when the contents are heavy or encounter high-intensity impacts, even with rounded corners, the structural reinforcement provided is still limited, and the foam material in the top corner area may still crush due to the inability to withstand excessive stress. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an impact-resistant foam packaging box with better structural reinforcement at the top corners.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: an impact-resistant foam packaging box, including a box body made of foam, the box body being rectangular in shape, the top corner of the box body being covered with protective corners, the protective corners including three protective plates, two of the protective plates being used to fit against the side of the box body, the other protective plate being used to fit against the bottom or top surface of the box body, the inner corner formed by the three protective plates fitting against the top corner, a snap-fit ​​member being provided on the inward side of the protective plate, and a snap-fit ​​groove being provided on the outer surface of the box body corresponding to the snap-fit ​​member, the snap-fit ​​member engaging with the snap-fit ​​groove.

[0006] Preferably, the protective plate is provided with an installation port, and the snap-fit ​​component includes a one-way valve and an airbag. The one-way valve is installed at the installation port, the air inlet of the airbag is connected to the one-way valve, the airbag extends into the snap-fit ​​groove, and the airbag inflates to fill the snap-fit ​​groove.

[0007] Preferably, the card slot is provided with a cup-shaped plastic card holder, the outer side of the plastic card holder is bonded to the inner side of the card slot, and the airbag extends into the plastic card holder and fills the plastic card holder.

[0008] Preferably, the bottom surface of the plastic card holder is bonded to the bottom of the card slot.

[0009] Preferably, all the top corners are rounded, and the inner corners are aligned with the rounded corners.

[0010] Preferably, the box body includes a box body and a box lid, the upper end of the box body is provided with an opening, the opening is provided with an annular stepped groove, and the box lid covers the stepped groove.

[0011] Preferably, the protective plate located on the upper surface of the box body is offset from the box lid.

[0012] Preferably, a notch is provided on the downward-facing side of the protective plate on the upper surface of the box body. The notch penetrates the protective plate on the side away from the inner corner. A flexible cover plate is placed on the box body. The cover plate is X-shaped and presses on the box lid. Each of the four sides of the cover plate is fixedly provided with a locking block. The locking blocks correspond one-to-one with the notch and are inserted into the corresponding notch.

[0013] Compared with the prior art, the advantages of this utility model are: 1. By adding a protective corner formed by three protective plates at the top corner of the box, the original single foam top corner is transformed into a composite structure of "foam top corner + protective corner". When the packaging box is dropped from the top corner, the impact load can be distributed and transferred over a wider range between the three protective plates of the protective corner and at the top corner of the box. This helps to avoid the impact energy from concentrating in a very small contact area, thereby reducing the local stress peak of the foam material in the top corner area to a certain extent, reducing the risk of the top corner crushing and improving the impact resistance of the top corner. 2. The protective corners are detachable, making it easy to replace them individually when the box or protective corners are damaged, providing good flexibility. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the exploded structure of this utility model; Figure 3 This is a schematic diagram of the protective corner structure in this utility model; Figure 4 This is a schematic diagram of the partial explosion structure of the protective corner in this utility model; Figure 5This is a partial exploded view of the card slot in this utility model.

[0015] In the diagram: 1. Box body; 11. Box body; 111. Slot; 112. Opening; 113. Step groove; 12. Box cover; 2. Protective corner; 21. Protective plate; 211. Mounting port; 212. Notch; 22. Snap-fit ​​component; 221. One-way valve; 222. Airbag; 3. Plastic bracket; 4. Cover plate; 41. Locking block. Detailed Implementation

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0017] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, 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.

[0018] Example 1: As Figures 1 to 3 As shown, an impact-resistant foam packaging box includes a box body 1 made of foam. The box body 1 is rectangular. The top corner of the box body 1 is covered with a protective corner 2. The protective corner 2 includes three protective plates 21. Two protective plates 21 are used to fit against the side of the box body 1, and the other protective plate 21 is used to fit against the bottom or top surface of the box body 1. The three protective plates 21 spatially enclose an inner corner, which fits against the top corner. A snap-fit ​​member 22 is provided on the inward side of the protective plate 21. The outer surface of the box body 1 is provided with a snap-fit ​​groove 111 corresponding to the snap-fit ​​member 22. The snap-fit ​​member 22 engages with the snap-fit ​​groove 111. The thickness of the protective plate 21 is 1.5 mm to 3 mm, preferably 2 mm, to ensure sufficient structural rigidity while taking into account the need for lightweighting. The outward-facing surface of the protective plate 21 can be provided with anti-slip texture. The snap-fit ​​part 22 and the corresponding snap-fit ​​groove 111 form a snap-fit ​​relationship, and a reliable connection between the protective corner 2 and the box body 1 is achieved through physical fitting.

[0019] In this embodiment, all apex corners are rounded, and the inner corners match and fit perfectly with the rounded corners.

[0020] Typically, the box body 1 is made of expandable polystyrene foam, and its dimensions are customized according to the shape of the product to be packaged and the transportation requirements. The length is usually 300 mm to 800 mm, the width is 200 mm to 600 mm, and the height is 150 mm to 500 mm. The specific values ​​are adjusted according to the actual application scenario. If the protective corners 2 are made of high-density polyethylene injection molding material, they have high compressive strength and toughness and can elastically deform and return to their original shape when subjected to external impact.

[0021] Example 2: Figures 2 to 4 As shown, the rest of the parts are the same as in Embodiment 1, except that the guard plate 21 is provided with an installation port 211, and the snap-fit ​​part 22 includes a one-way valve 221 and an airbag 222. The one-way valve 221 is installed at the installation port 211, and the air inlet of the airbag 222 is connected to the one-way valve 221. The airbag 222 extends into the slot 111, and the airbag 222 fills the slot 111 after it is inflated.

[0022] In this embodiment, the one-way valve 221 is preferably a duckbill-type one-way valve made of miniature rubber material, with an outer diameter slightly larger than the diameter of the mounting port 211. It is pressed in and fixedly installed at the mounting port 211 by interference fit to ensure sealing performance. The air inlet of the one-way valve 221 is located on the outward side of the protective plate 21, and the air outlet is located on the inward side of the protective plate 21 and extends towards the slot 111. It can be easily inflated using a common manual air pump.

[0023] In this embodiment, the airbag 222 preferably adopts a thin-walled bladder-like structure made of elastic silicone material. Its air inlet is sealed to the air outlet of the one-way valve 221 by heat fusion welding. The main body of the airbag 222 is flat and smaller than the inner cavity of the slot 111 to facilitate insertion. In the uninflated state, the airbag 222 is in a naturally contracted state. When air is injected into the airbag 222 through the one-way valve 221, the airbag 222 elastically expands, gradually expanding its shape and eventually completely filling the internal space of the slot 111, forming a tight fit with the inner wall of the slot 111, thereby firmly anchoring the protective angle 2 to the box 1. It should be noted that the airbag 222 only needs to fit into the slot 111 after expansion; it is not necessary to enlarge the slot 111. The fixation is achieved by the cooperation of the airbags 222 on the three protective plates 21.

[0024] Example 3: Figure 4 and Figure 5 As shown, the rest of the parts are the same as in Embodiment 2, except that a cup-shaped plastic card holder 3 is provided in the card slot 111. The outer side of the plastic card holder 3 is bonded to the inner side of the card slot 111, and the airbag 222 extends into the plastic card holder 3 and fills the plastic card holder 3. Furthermore, the bottom surface of the plastic card holder 3 is bonded to the bottom of the card slot 111 to ensure a stable connection between the plastic card holder 3 and the card slot 111.

[0025] The plastic card holder 3 helps to enhance the stability and durability of the card connection structure. It can prevent the airbag 222 from over-inflating and opening the card slot 111, thus ensuring the reliability of the connection.

[0026] Example 4: Figure 1 , Figure 2 and Figure 4 As shown, the rest is the same as in Embodiment 1, except that the box body 1 includes a box body 11 and a box lid 12. The upper end of the box body 11 is provided with an opening 112 for placing the contents, and an annular stepped groove 113 is provided at the opening 112. The box lid 12 covers the stepped groove 113. The slots 111 are all provided on the box body 11. The protective plate 21 located on the upper surface of the box body 1 is offset from the box lid 12 to prevent the protective plate 21 from affecting the normal assembly of the box lid 12.

[0027] In this embodiment, a notch 212 is provided on the downward side of the protective plate 21 on the upper surface of the box body 1. The notch 212 penetrates the side of the protective plate 21 away from the inner corner. A flexible cover plate 4 is placed on the box body 1. The cover plate 4 is X-shaped and presses on the box cover 12. The top of the four sides of the cover plate 4 are respectively fixed with a locking block 41. The locking block 41 corresponds to the notch 212 and is inserted into the corresponding notch 212.

[0028] It should be noted that the cover plate 4 can be bent and deformed under external force and automatically return to its original shape after the external force is removed. During assembly, the cover plate 4 is first bent and deformed so that the four locking blocks 41 correspond one-to-one with the four notches 212. Then the cover plate 4 is released and restored to its original shape. At the same time, the four locking blocks 41 are inserted into the corresponding notches 212 to achieve locking.

[0029] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the implementation of the present invention is not limited to the above-described manner. Any improvements made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, are all within the protection scope of the present invention.

Claims

1. An impact-resistant foam packaging box, comprising a box body (1) made of foam, said box body (1) being rectangular parallelepiped in shape, characterized in that: The top corner of the box body (1) is covered with a protective corner (2). The protective corner (2) includes three protective plates (21). Two of the protective plates (21) are used to fit against the side of the box body (1), and the other protective plate (21) is used to fit against the lower or upper end face of the box body (1). The inner corner formed by the three protective plates (21) fits against the top corner. A snap-fit ​​member (22) is provided on the inward side of the protective plate (21). The outer surface of the box body (1) is provided with a slot (111) corresponding to the snap-fit ​​member (22). The snap-fit ​​member (22) engages with the slot (111).

2. The impact-resistant foam packaging box according to claim 1, characterized in that: The guard plate (21) is provided with an installation port (211). The snap-fit ​​component (22) includes a one-way valve (221) and an airbag (222). The one-way valve (221) is installed at the installation port (211). The air inlet of the airbag (222) is connected to the one-way valve (221). The airbag (222) extends into the slot (111). After the airbag (222) is inflated, it fills the slot (111).

3. The impact-resistant foam packaging box according to claim 2, characterized in that: The slot (111) is provided with a cup-shaped plastic card holder (3), the outer side of the plastic card holder (3) is bonded to the inner side of the slot (111), and the airbag (222) extends into the plastic card holder (3) and fills the plastic card holder (3).

4. The impact-resistant foam packaging box according to claim 3, characterized in that: The bottom surface of the plastic card holder (3) is bonded to the bottom of the card slot (111).

5. The impact-resistant foam packaging box according to claim 1, characterized in that: All the top corners are rounded, and the inner corners are aligned with the rounded corners.

6. The impact-resistant foam packaging box according to claim 1, characterized in that: The box body (1) includes a box body (11) and a box lid (12). The upper end of the box body (11) is provided with an opening (112), and an annular stepped groove (113) is provided at the opening (112). The box lid (12) covers the stepped groove (113).

7. The impact-resistant foam packaging box according to claim 6, characterized in that: The protective plate (21) located on the upper surface of the box body (1) is offset from the box cover (12).

8. The impact-resistant foam packaging box according to claim 7, characterized in that: A notch (212) is provided on the downward side of the protective plate (21) on the upper surface of the box body (1). The notch (212) penetrates the side of the protective plate (21) away from the inner corner. A flexible cover plate (4) is placed on the box body (1). The cover plate (4) is X-shaped and presses on the box cover (12). The top of the four sides of the cover plate (4) is fixedly provided with a locking block (41). The locking block (41) corresponds to the notch (212) and is inserted into the corresponding notch (212).

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