Packaging box

Abstract

The application discloses a packaging box, and belongs to the technical field of display panel storage and transportation devices. The packaging box comprises a bottom plate, an outer bottom surface and an inner bottom surface of the bottom plate, a side wall, an inner side wall surface and an outer side wall surface of the side wall, and a receiving cavity defined by the inner side wall surface of the side wall and the inner bottom surface of the bottom plate. A reinforcing part is arranged on the bottom plate and protrudes into the receiving cavity. The reinforcing part has a circular or elliptical shape in the orthographic projection on the top surface, and the radial dimension of the orthographic projection is LA mm. The normal line distance between the tangent line of the edge of the reinforcing part and the inner side wall surface is L1 mm, and the value range of L1 satisfies L1=(0.01~0.5)×LA±5. According to the technical scheme, the middle part of the bottom plate can bear more pressure, the packaging box is prevented from being deformed due to excessive concentration of pressure around the receiving cavity, the anti-deformation capacity and the overall structural strength of the packaging box are improved, and the risk of damage of the display panel in the storage and transportation process is reduced.

Description

Technical Field

[0001] This application relates to the field of display panel storage and transportation devices, and in particular to a packaging box with high structural strength. Background Technology

[0002] When display panels are shipped as components of display devices, multiple display panels are usually placed in a dedicated packaging box in a horizontal stack for centralized storage and transportation. Limiting structures set in the packaging box are used to restrict the movement of the stacked display panels and prevent them from being damaged by external impacts during storage and transportation.

[0003] Currently, most packaging boxes used for centralized storage and transportation of display panels have flat bottom plates to prevent hard contact between the display panel and the bottom plate. However, flat bottom plates lack reinforced structural support, resulting in insufficient overall structural strength of the packaging box. Since the limiting structure is generally located around the display panel, it transmits the load to the perimeter of the cavity. If the load of the display panel is large, the perimeter of the cavity will experience relatively greater stress, and the stress tends to concentrate near the side walls of the packaging box. However, the stress in the center of the bottom plate is insufficient, resulting in a low stress value. This leads to uneven stress distribution throughout the packaging box, which can easily cause the packaging box to deform and squeeze the display panel. In severe cases, it can even cause the packaging box to break, significantly increasing the risk of display panel damage. Utility Model Content

[0004] This application provides a packaging box to at least partially solve the above-mentioned technical problems.

[0005] To achieve the above objectives, this application provides a packaging box, comprising: a base plate having opposing outer and inner bottom surfaces; and side walls surrounding the edge of the base plate, the side walls having opposing inner and outer wall surfaces, the inner wall surface of the side walls defining a receiving cavity with the inner bottom surface of the base plate; the base plate having a reinforcing portion protruding into the receiving cavity, the orthographic projection of the reinforcing portion on the inner bottom surface being circular or elliptical, the radial dimension of the orthographic projection being LA mm, the normal distance between the edge tangent of the reinforcing portion and the inner wall surface being L1 mm, and the value range of L1 satisfying: L1 = (0.01~0.5) × LA ± 5.

[0006] Optionally, the reinforcing part is protruding on the inner bottom surface and forms a first arc-shaped surface, and the reinforcing part is recessed on the outer bottom surface and forms a second arc-shaped surface, wherein the first arc-shaped surface is parallel to the second arc-shaped surface; wherein the gap between the first arc-shaped surface and the second arc-shaped surface is L2 mm, the gap between the outer bottom surface and the inner bottom surface is L3 mm, and the relationship between L2 and L3 satisfies: L2=L3.

[0007] Optionally, the recess depth of the second arc-shaped surface on the outer bottom surface is L4 mm, and the value of L4 is within the range of: 25 mm ≤ L4 ≤ 45 mm.

[0008] Optionally, the value range of L2 satisfies: L2 = (1.7~3.8) × L4 ± 5. Optionally, the value range of L2 satisfies: 70 mm ≤ L2 ≤ 100 mm.

[0009] Optionally, the sidewall is perpendicular to the base plate, and the height of the outer sidewall in the direction perpendicular to the outer bottom surface is L5 mm, wherein the value of L5 satisfies: L5 = (1.2~2.2) × L2 ± 5. Alternatively, the sidewall is perpendicular to the base plate, and the height of the outer sidewall in the direction perpendicular to the outer bottom surface is L5 mm, wherein the value of L5 satisfies: 110 mm ≤ L5 ≤ 160 mm.

[0010] Optionally, the gap between the inner wall and the outer wall is L6 mm, and the relationship between L6 and L3 is: L6 = L3.

[0011] Optionally, the base plate is a rectangular base plate, the reinforcing part is located at the center of the base plate, the normal distance between the edge tangent of the reinforcing part in the length direction of the base plate and the inner wall surface is L11 mm, the normal distance between the edge tangent of the reinforcing part in the width direction of the base plate and the inner wall surface is L12 mm, and the relationship between L11 and L12 satisfies: L11=L12.

[0012] Optionally, the receiving cavity is configured to receive a display panel, and the gap between the inner wall and the display panel received in the receiving cavity is L7 mm, wherein the value of L7 is within the range of 1 mm ≤ L7 ≤ 3 mm.

[0013] In the packaging box of this application embodiment, the above technical solution enables the center of the bottom plate to bear more pressure, preventing excessive pressure concentration around the cavity and thus preventing the packaging box from deforming. This improves the packaging box's resistance to deformation and overall structural strength, and reduces the risk of damage to the display panel during storage and transportation.

[0014] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0016] Figure 1 This is a top view of the packaging box provided in an exemplary embodiment of this disclosure; Figure 2 The packaging box provided in the exemplary embodiments of this disclosure is in Figure 1 Three-dimensional view of the cross-sectional structure at the AA section indicator line; Figure 3 When the packaging box provided in the exemplary embodiments of this disclosure carries a display panel, in Figure 1 The front view of the sectional structure at the AA section indicator line.

[0017] Explanation of reference numerals in the attached figures: 10 - Packaging box; 101 - Receiving cavity; 20 - Display panel; 1-Base plate; 11-Outer bottom surface; 12-Inner bottom surface; 2-Side wall; 21-Inner wall surface; 22-Outer wall surface; 3-Reinforcing part; 31-First arc-shaped surface; 32-Second arc-shaped surface; XX-axis direction; YY-axis direction; ZZ-axis direction. Detailed Implementation

[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0019] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features.

[0020] This application provides a packaging box 10 for housing a display panel 20 (such as...). Figure 3(as shown in the image), please refer to Figures 1 to 3 , Figure 1 This is a top view of the packaging box 10 provided in an embodiment of this application.

[0021] Packaging box 10 includes a base plate 1 and side walls 2, such as Figure 2 As shown, the base plate 1 can be configured as a plate-like structure, having an outer bottom surface 11 and an inner bottom surface 12. The side wall 2 can also be configured as a plate-like structure, surrounding the edge of the base plate 1, and can be perpendicular to the base plate 1. The side wall 2 has an inner side wall surface 21 and an outer side wall surface 22, the inner side wall surface 21 of the side wall 2 and the inner bottom surface 12 of the base plate 1 defining a receiving cavity 101 for accommodating the display panel 20.

[0022] The base plate 1 is provided with a reinforcing part 3 that protrudes into the receiving cavity 101. The orthographic projection of the reinforcing part 3 on the inner bottom surface 12 is circular or elliptical, and the radial dimension of the orthographic projection is LA mm (e.g., Figure 3 As shown in the figure), the normal distance between the edge tangent of the reinforcing part 3 and the inner wall surface 21 is L1 mm (as shown in the figure). Figure 3 As shown in the diagram, the range of L1 satisfies: L1 = (0.01~0.5) × LA ± 5, that is, 0.01 × LA ± 5 ≤ L1 ≤ 0.5 × LA ± 5. The range of L1 (the normal distance between the edge tangent of the reinforcing part 3 and the inner wall surface 21, which will not be described in detail below) is proportional to the value of LA (the radial dimension of the orthographic projection of the reinforcing part 3 on the inner bottom surface 12, which will not be described in detail below). In this application, the "normal distance" refers to the minimum distance between the edge tangent of the reinforcing part 3 and the corresponding inner wall surface 21 obtained in the normal direction of the edge tangent of the reinforcing part 3.

[0023] In this embodiment, the projection of the reinforcing part 3 onto the inner bottom surface 12 of the packaging box 10 can be circular or elliptical, and this application does not limit this. The reinforcing part 3 can be directly disposed on the inner bottom surface 12 of the base plate 1; or, the reinforcing part 3 can be formed by protruding from the outer bottom surface 11 of the base plate 1 toward the inner bottom surface 12, that is, the reinforcing part 3 is convex on the inner bottom surface 12 and recessed on the outer bottom surface 11. The height of the protrusion of the reinforcing part 3 on the inner bottom surface 12 and the depth of the recess on the outer bottom surface 11 can be set according to actual usage requirements. This application does not limit the above features of the reinforcing part 3, as long as it can ensure that the reinforcing part 3 protrudes arc-shaped into the receiving cavity 101 on the base plate 1.

[0024] The packaging box 10 provided in this application embodiment sets the value range of L1 (i.e., the normal distance between the edge tangent of the reinforcing part 3 and the inner wall surface 21) to be in a preset proportional relationship with the value of LA (i.e., the radial dimension of the orthographic projection of the reinforcing part 3 on the inner bottom surface 12). This ensures that the size ratio between the reinforcing part 3 and the base plate 1 is optimal in packaging boxes 10 of different specifications and sizes, and ensures that there is a sufficient gap between the edge of the reinforcing part 3 and the inner wall surface 21, ensuring that the strength of the packaging box 10 meets the design requirements. In addition, by setting the value range of L1 to be in a preset proportional relationship with the radial dimension LA of the orthographic projection of the reinforcing part 3 on the inner bottom surface 12, when the size of the base plate 1 is determined, after determining the value of either parameter LA or L1, the value range of the other parameter LA or L1 can be calculated according to the above formula. Then, the edge dimension range of the reinforcing part 3 can be defined according to the value range of LA and L1, realizing the quantification of the projected shape and area of ​​the reinforcing part 3. Through the above technical solutions, the reinforcing portion 3 protruding into the receiving cavity 101 of the packaging box 10 provided in this embodiment serves to reinforce the base plate 1, equivalent to a reinforcing rib on the base plate 1. This significantly improves the pressure-bearing capacity of the middle part of the base plate 1, and the protruding reinforcing portion 3 provides a supporting skeleton for the middle part of the base plate 1, allowing the middle part of the base plate 1 to bear more pressure, preventing excessive pressure concentration around the receiving cavity 101 and causing deformation of the packaging box 10. This significantly improves the deformation resistance of the packaging box 10, enhances the overall structural strength of the packaging box 10, and reduces the risk of damage to the display panel 20 during storage and transportation. In some embodiments, the value of L1 can be set between 15mm and 25mm, including the endpoint value. Specifically, the value of L1 can be set to 15 mm, 16 mm, 18 mm, 20 mm, 22 mm, 25 mm, etc.

[0025] The packaging box 10 provided in this application, by limiting the specific value range of L1, ensures that there is a gap of not less than 15mm and not more than 25mm between the edge of the reinforcing part 3 and the side wall 2. This ensures that the reinforcing part 3 enhances the overall strength of the base plate 1, while also ensuring that there is a sufficient gap between the edge of the reinforcing part 3 and the inner side wall 21. This gap can be used to arrange a support and limiting structure (not shown in the figure) around the display panel 20 to support and limit the display panel 20, and prevent the reinforcing part 3 from making direct hard contact with the display panel 20.

[0026] In some embodiments, for a packaging box 10 that houses a small-sized display panel (e.g., less than 10 inches), the value of LA can be set between 0 and 100 mm (LA does not include 0); in this case, the value of L1 satisfies: L1 = (0.3~0.5) × LA ± 5. For a packaging box 10 that houses a medium-sized display panel (e.g., 10-14 inches), the value of LA can be set between 100 and 500 mm; in this case, the value of L1 satisfies: L1 = (0.02~0.2) × LA ± 5. For a packaging box 10 that houses a medium-to-large-sized display panel (e.g., 16-27 inches), the value of LA can be set between 500 and 1000 mm. In this case, the value of L1 satisfies the following range: L1 = (0.02~0.04) × LA ± 5. For a packaging box 10 that houses a large-sized display panel, the value of LA can be set between 1000 and 3000 mm. In this case, the value of L1 satisfies the following range: L1 = (0.01~0.02) × LA ± 5.

[0027] This application adaptively adjusts the preset ratio between L1 and LA for packaging boxes 10 of different specifications and sizes, ensuring that the size ratio of the reinforcing part 3 relative to the base plate 1 can meet the strength requirements of packaging boxes 10 of different specifications and sizes, guaranteeing the deformation resistance of packaging boxes 10 of different specifications and sizes, and preventing the problem of packaging box 10 deformation caused by the size ratio of the reinforcing part 3 being out of balance.

[0028] In some embodiments, please refer to Figure 2 and Figure 3 In the packaging box 10 provided in this embodiment, the reinforcing part 3 is formed by protruding from the outer bottom surface 11 to the inner bottom surface 12 of the base plate 1. The reinforcing part 3 is convex on the inner bottom surface 12 and has a first arc-shaped surface 31. The reinforcing part 3 is concave on the outer bottom surface 11 and has a second arc-shaped surface 32. The first arc-shaped surface 31 is parallel to the second arc-shaped surface 32. The gap between the first arc-shaped surface 31 and the second arc-shaped surface 32 is L2 mm, and the gap between the outer bottom surface 11 and the inner bottom surface 12 is L3 mm. The relationship between L2 and L3 satisfies: L2 = L3.

[0029] The packaging box 10 provided in this embodiment has a reinforcing part 3 formed by an arc-shaped bulge from the outer bottom surface 11 of the base plate 1 to the inner bottom surface 12. Compared with the method of directly setting the reinforcing part 3 on the inner bottom surface 12 of the base plate 1, the recessed structure formed by the reinforcing part 3 on the outer bottom surface 11 plays a role in weight reduction, which can reduce the total weight of the packaging box 10 and facilitate the lightweight design of the packaging box 10. In addition, L2 (i.e., the gap between the first arc-shaped surface 31 and the second arc-shaped surface 32) can represent the thickness of the reinforcing part 3, and L3 (i.e., the gap between the outer bottom surface 11 and the inner bottom surface 12) can represent the thickness of the base plate 1. In the packaging box 10 provided in this embodiment, L2 and L3 are equal, so that the thickness of the reinforcing part 3 is consistent with the thickness of the base plate 1. The structure of the base plate 1 can be reinforced without significantly increasing the material of the packaging box 10. Furthermore, the planar base plate can be optimized into a composite structure with the first arc-shaped surface 31 and the second arc-shaped surface 32, which significantly improves the stress condition of the base plate 1, avoids stress concentration around the cavity 101, further improves the overall load-bearing capacity of the packaging box 10, and reduces the risk of the packaging box 10 deforming and squeezing the display panel 20.

[0030] In some examples, please refer to Figure 3 In the packaging box 10 provided in this embodiment, the recess depth of the second arc-shaped surface 32 on the outer bottom surface 11 is L4 mm. The value of L4 is within the range of 25 mm ≤ L4 ≤ 45 mm. In specific implementation, the value of L4 can be set to 25 mm, 27 mm, 29 mm, 30 mm, 32 mm, 35 mm, 38 mm, 40 mm, 42 mm, 45 mm, etc. Since the thickness of the reinforcing part 3 is the same as the thickness of the base plate 1, and the first arc-shaped surface 31 is parallel to the second arc-shaped surface 32, the recess depth of the second arc-shaped surface 32 on the outer bottom surface 11 is the same as the bulge height of the first arc-shaped surface 31 on the inner bottom surface 12, both of which are set between 25 mm and 45 mm (including the endpoint value).

[0031] The packaging box 10 provided in this disclosure, through the above technical solution, ensures the structural reinforcement effect of the base plate 1 while preventing the reinforcing part 3 from being excessively recessed on the outer bottom surface 11 and excessively raised on the inner bottom surface 12, thus ensuring the structural integrity of the base plate 1 and achieving a balance between structural reinforcement and the thickness of the base plate 1.

[0032] In some embodiments, please refer to Figure 3In the packaging box 10 provided in this embodiment, the value range of L2 satisfies: L2=(1.7~3.8)×L4±5, that is, 1.7×L4±5≤L2≤3.8×L4±5. In the formula, L2 represents the gap size between the first arc-shaped surface 31 and the second arc-shaped surface 32, that is, the thickness of the reinforcing part 3, and L4 represents the depth of the indentation of the second arc-shaped surface 32 on the outer bottom surface 11. Since L2=L3, the value of L2 can also represent the thickness of the bottom plate 1.

[0033] The packaging box 10 provided in this disclosure achieves an optimal balance between structural strength, material efficiency, and production feasibility by precisely matching the proportional relationship between the thickness of the reinforcing part 3 and the recess depth of the second arc-shaped surface 32 of the reinforcing part 3 on the outer bottom surface 11. This ensures that when the recess depth of the second arc-shaped surface 32 of the reinforcing part 3 on the outer bottom surface 11 increases, the thickness of the base plate 1 and the thickness of the reinforcing part 3 also increase accordingly, avoiding self-fracture caused by excessive bulging of the reinforcing part 3. When the recess depth of the second arc-shaped surface 32 of the reinforcing part 3 on the outer bottom surface 11 decreases, the thickness of the base plate 1 and the thickness of the reinforcing part 3 also decrease accordingly. This achieves a match between the thickness of the base plate 1, the thickness of the reinforcing part 3, and the recess depth of the second arc-shaped surface 32 on the outer bottom surface 11, ensuring the reinforcing effect of the reinforcing part 3 on the base plate 1 and preventing the packaging box 10 from deforming due to uneven stress, while also avoiding material redundancy or structural failure.

[0034] In some examples, please refer to Figure 3 The packaging box 10 provided in this embodiment, based on the above calculation formula for L2, and substituting the value of L4, shows that the range of L2 (i.e., the gap between the first arc-shaped surface 31 and the second arc-shaped surface 32) satisfies: 70 mm ≤ L2 ≤ 100 mm. In specific implementations, the value of L2 can be set to 70 mm, 73 mm, 75 mm, 77 mm, 80 mm, 82 mm, 85 mm, 88 mm, 90 mm, 92 mm, 94 mm, 96 mm, 98 mm, 100 mm, etc. The value of L2 can be used to represent the thickness of the reinforcing part 3. Since L2 = L3, the value of L2 can also represent the thickness of the base plate 1. That is, the thickness of both the base plate 1 and the reinforcing part 3 can be set between 70 mm and 100 mm (including the endpoint value).

[0035] The packaging box 10 provided in this disclosure, through the above technical solution, limits the thickness of the base plate 1 and the thickness of the reinforcing part 3 of the packaging box 10. The reinforcing part 3 can strengthen the structure of the base plate 1 and share the stress around the cavity 101. While ensuring the load-bearing capacity of the packaging box 10 on the display panel 20, it avoids the base plate 1 and the reinforcing part 3 being insufficient or excessively thick, which is conducive to the optimization of the weight of the entire packaging box 10. It not only saves material costs, but also improves the portability of the packaging box 10. While ensuring the reinforcement effect of the packaging box 10, it controls the amount of material used in the packaging box 10, and achieves a balance between structural reinforcement and cost and weight of the packaging box 10.

[0036] In some embodiments, please refer to Figure 3 In the packaging box 10 provided in this embodiment, the side wall 2 is set perpendicular to the bottom plate 1. The height of the outer side wall 22 in the direction perpendicular to the outer bottom surface 11 is L5 mm. The value range of L5 satisfies: L5=(1.2~2.2)×L2±5, that is, 1.2×L2±5≤L5≤2.2×L2±5. The value of L5 in the formula can be used to represent the overall height of the side wall 2 (that is, the sum of the height of the inner side wall 21 and the thickness of the bottom plate 1). L2 in the formula represents the size of the gap between the first arc surface 31 and the second arc, that is, the thickness of the reinforcing part 3. Since L2=L3, the value of L2 can also represent the thickness of the bottom plate 1. The packaging box 10 provided in this disclosure achieves a balance between the bottom load-bearing capacity and the lateral support capacity of the packaging box 10 by precisely matching the proportional relationship between the overall height of the side wall 2 and the thickness of the base plate 1 and the reinforcement 3. On the one hand, it can prevent the center of gravity of the packaging box 10 from shifting upward due to excessively high side walls 2 or excessively thin base plate 1 and reinforcement 3, thus preventing the packaging box 10 from becoming top-heavy. It can also prevent the base plate 1 from collapsing or breaking due to excessively thin base plate 1 and reinforcement 3. On the other hand, it can also prevent the packaging box 10 from being damaged due to insufficient height of the side walls 2. The problem of weakened side protection and insufficient lateral support for the display panel 20 due to reasons such as excessive thickness of the base plate 1 and the reinforcing part 3 is addressed by forming a "mechanical closed loop" between the lateral support performance and the bottom load-bearing performance of the packaging box 10. This avoids the performance shortcomings caused by a single structural parameter of the packaging box 10 (such as limiting only the base plate 1, the thickness of the reinforcing part 3, or the height of the side wall 2). Furthermore, it can reduce production complexity and control costs through standardized quantitative proportions, ultimately achieving the design goal of a packaging box 10 that is structurally reliable, functionally compatible, and cost-effective.

[0037] In some embodiments, please refer to Figure 3In this embodiment of the packaging box 10, the sidewall 2 is perpendicular to the base plate 1. The height of the outer sidewall 22 in the direction perpendicular to the outer bottom surface 11 is L5 mm. Based on the above calculation formula for L5, substituting the value of L2, the range of L5 satisfies: 110 mm ≤ L5 ≤ 160 mm. In specific implementations, the value of L5 can be set to 110 mm, 115 mm, 117 mm, 120 mm, 125 mm, 128 mm, 130 mm, 135 mm, 140 mm, 145 mm, 148 mm, 150 mm, 152 mm, 155 mm, 157 mm, 160 mm, etc. The value of L5 can be used to represent the overall height of the sidewall 2, which is equal to the sum of the height of the inner sidewall 21 in the direction perpendicular to the inner bottom surface 12 and the thickness of the base plate 1.

[0038] The packaging box 10 provided in this disclosure, through the above technical solution, enables the height of the side wall 2 to be matched with the thickness of the reinforcing part 3, the thickness of the base plate 1, and the recess depth of the second arc-shaped surface 32 on the outer bottom surface 11, significantly enhancing the overall structural stability of the packaging box 10. When the packaging box 10 is subjected to stacking pressure from the display panel 20, the side wall 2 can distribute part of the pressure onto the base plate 1 and the reinforcing part 3, with all three sharing the load, effectively preventing the problem of the packaging box 10 deforming and squeezing the display panel 20.

[0039] In some embodiments, please refer to Figure 3 In the packaging box 10 provided in this embodiment, the gap between the inner sidewall 21 and the outer sidewall 22 is L6 mm. The relationship between L6 and L3 is: L6=L3, where L6 represents the thickness of the sidewall 2 and L3 represents the thickness of the base plate 1. Since L2=L3, the value of L3 can also be used to represent the thickness of the reinforcing part 3. That is, the thickness of the sidewall 2 is consistent with the thickness of the base plate 1 and the reinforcing part 3, and can be set between 70 mm and 100 mm (including the endpoint value).

[0040] The packaging box 10 provided in this disclosure, by limiting the thickness of the side wall 2, the base plate 1, and the reinforcing part 3, can ensure that the thickness of each part of the packaging box 10 is uniform and consistent, and ensure that stress can be uniformly transmitted between the side wall 2, the base plate 1, and the reinforcing part 3. This effectively avoids stress abrupt changes at the joints of different parts of the packaging box 10 (such as the joint between the side wall 2 and the base plate 1, the joint between the reinforcing part 3 and the base plate 1) caused by inconsistent thickness of each part of the packaging box 10, and can prevent problems such as local cracking and deformation caused by stress abrupt changes at the joints of different parts of the packaging box 10.

[0041] In some embodiments, please refer to Figure 1The packaging box 10 provided in this embodiment has a rectangular plate structure as the base plate 1. The reinforcing part 3 can be disposed in the center of the base plate 1. The normal distance between the edge tangent of the reinforcing part 3 in the length direction of the base plate 1 and the inner wall surface 21 is L11 mm. The normal distance between the edge tangent of the reinforcing part 3 in the width direction of the base plate 1 and the inner wall surface 21 is L12 mm. The relationship between L11 and L12 is: L11=L12.

[0042] To facilitate readers' understanding of the technical solution of this application, the length direction of the base plate 1 is defined as the X-axis direction, the width direction of the base plate 1 is defined as the Y-axis direction, the thickness direction of the base plate 1 is defined as the Z-axis direction, and the thickness direction of the base plate 1 is also the height direction of the side wall 2.

[0043] like Figure 1 As shown, when the base plate 1 is configured as a rectangular plate structure, the side walls 2 surround the four edges of the base plate 1. The side walls 2 extending along the length direction of the base plate 1, i.e., the X-axis direction, are relatively longer, while the side walls 2 extending along the width direction of the base plate 1, i.e., the Y-axis direction, are relatively shorter. Because L11=L12 is defined, the minimum distance between the edge tangent of the reinforcing part 3 and each inner side wall surface 21 is the same. At this time, the orthographic projection of the reinforcing part 3 on the inner bottom surface 12 is a centrally arranged ellipse. The orthographic projection of the ellipse has a major axis along the X-axis direction and a minor axis along the Y-axis direction. The radial dimension of the orthographic projection of the ellipse along the major axis direction is LA1, and the radial dimension along the minor axis direction is LA2. The length of the inner bottom surface 12 along the X-axis direction is LA1+2×L12, and the width of the inner bottom surface 12 along the Y-axis direction is LA2+2×L11. The values ​​of LA1 and LA2 can be set according to the specifications and dimensions of the packaging box 10, ensuring that the normal distance L1 between the edge tangent of the elliptical orthographic projection of the reinforcing part 3 on the inner bottom surface 12 and the corresponding inner side wall 21 is between 15mm and 25mm.

[0044] In some other embodiments, the base plate 1 can also be configured as a square plate structure, with side walls 2 surrounding the four edges of the base plate 1. The lengths of each side wall 2 are the same in both the length and width directions of the base plate 1. Since L11=L12 is defined, the minimum distance between the edge tangent of the reinforcing part 3 and each side wall 2 is the same. In this case, the orthographic projection of the reinforcing part 3 on the inner bottom surface 12 is a centrally arranged circle.

[0045] The packaging box 10 provided in this embodiment, through the above technical solution, enables the supporting range of the reinforcing part 3 to uniformly cover the entire area of ​​the base plate 1. When the packaging box 10 is subjected to force, the reinforcing part 3 can uniformly transmit the stress to all parts of the packaging box 10 through the arc edge. Whether it is the vertical stress from the display panel 20 or the lateral compression from the outside (such as the collision during storage and transportation), the deformation resistance of each area of ​​the base plate 1 is consistent, so that the stress can be distributed to the entire base plate 1 rather than concentrated on one side, further reducing the risk of bottom collapse or sidewall 2 deformation.

[0046] In some embodiments, please refer to Figure 3 In this embodiment of the present disclosure, the packaging box 10 has a receiving cavity 101 configured to receive a display panel 20. During use, the display panel 20 is stacked and received within the receiving cavity 101 along the thickness direction of the base plate 1, i.e., the Z-axis direction. The gap between the inner wall surface 21 and the side portion of the display panel 20 received in the receiving cavity 101 is L7 mm. The value of L7 satisfies the following range: 1 mm ≤ L7 ≤ 3 mm. In specific implementations, the value of L7 can be set to 1 mm, 1.15 mm, 1.25 mm, 1.3 mm, 1.45 mm, 1.5 mm, 1.55 mm, 1.6 mm, 1.65 mm, 1.7 mm, 1.75 mm, 1.8 mm, 1.85 mm, 2 mm, 2.2 mm, 2.5 mm, 2.8 mm, 3 mm, etc.

[0047] The packaging box 10 provided in this embodiment can, through the above technical solution, set the dimensions of the base plate 1 and the side wall 2 according to the size characteristics of the display panel 20 to be stored and transported, ensuring that the value range of L7 (i.e. the size of the gap between the inner side wall 21 and the side of the display panel 20) meets the upper and lower limits of the display panel size tolerance, ensuring that the display panel can be stacked in the receiving cavity 101, avoiding interference between the side of the display panel and the side wall 2, and preventing the display panel from touching the inner side wall 21, while forming a buffer gap between the display panel 20 and the side wall 2, which facilitates the arrangement of a limiting structure within the buffer gap range, and can reduce the risk of direct collision between the display panel 20 and the side wall 2 during storage and transportation.

[0048] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0049] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0050] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A packaging box, characterized in that, The packaging box includes: The base plate has an outer bottom surface and an inner bottom surface; A sidewall is provided at the edge of the base plate, the sidewall having opposing inner and outer wall surfaces, the inner wall surface of the sidewall defining a receiving cavity with the inner bottom surface of the base plate; The base plate is provided with a reinforcing part that protrudes into the receiving cavity. The orthographic projection of the reinforcing part on the inner bottom surface is circular or elliptical. The radial dimension of the orthographic projection is LA mm. The normal distance between the edge tangent of the reinforcing part and the inner sidewall is L1 mm. The value range of L1 satisfies: L1=(0.01~0.5)×LA±5.

2. The packaging box according to claim 1, characterized in that, The reinforcing part is protruding on the inner bottom surface and forms a first arc-shaped surface, and the reinforcing part is recessed on the outer bottom surface and forms a second arc-shaped surface, with the first arc-shaped surface parallel to the second arc-shaped surface; The gap between the first arc-shaped surface and the second arc-shaped surface is L2 mm, and the gap between the outer bottom surface and the inner bottom surface is L3 mm. The relationship between L2 and L3 is: L2 = L3.

3. The packaging box according to claim 2, characterized in that, The second arc-shaped surface has a recess depth of L4 mm on the outer bottom surface, and the value of L4 is within the range of 25 mm ≤ L4 ≤ 45 mm.

4. The packaging box according to claim 3, characterized in that, The value range of L2 satisfies: L2 = (1.7~3.8) × L4 ± 5.

5. The packaging box according to claim 2, characterized in that, The value range of L2 satisfies: 70 mm ≤ L2 ≤ 100 mm.

6. The packaging box according to claim 2, characterized in that, The sidewall is set perpendicular to the bottom plate, and the height of the outer sidewall in the direction perpendicular to the outer bottom surface is L5 mm. The value range of L5 satisfies: L5=(1.2~2.2)×L2±5.

7. The packaging box according to claim 1, characterized in that, The sidewall is perpendicular to the bottom plate, and the height of the outer sidewall in the direction perpendicular to the outer bottom surface is L5 mm, and the value of L5 is within the range of: 110 mm ≤ L5 ≤ 160 mm.

8. The packaging box according to claim 2, characterized in that, The gap between the inner wall and the outer wall is L6 mm, and the relationship between L6 and L3 is: L6 = L3.

9. The packaging box according to claim 1, characterized in that, The base plate is a rectangular base plate, and the reinforcing part is located in the center of the base plate. The normal distance between the edge tangent of the reinforcing part in the length direction of the base plate and the inner wall is L11 mm, and the normal distance between the edge tangent of the reinforcing part in the width direction of the base plate and the inner wall is L12 mm. The relationship between L11 and L12 is: L11=L12.

10. The packaging box according to claim 1, characterized in that, The cavity is configured to accommodate a display panel, and the gap between the inner wall and the display panel accommodated in the cavity is L7 mm, wherein the value of L7 is within the range of 1 mm ≤ L7 ≤ 3 mm.

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