Packaging box body of display module

Abstract

The utility model discloses a packaging box body of a display module. The packaging box of the display module in one embodiment comprises a shell with a containing cavity and a cover matched with an opening of the shell, the shell comprises a bottom plate and side wall plates arranged on the bottom plate, the side wall plates surround to form a plurality of cavities located at different heights in the direction from the bottom plate to the cover, and the side wall plates are arranged on the bottom plate. Comprising a first cavity close to a bottom plate, a second cavity close to the cover plate and at least one third cavity located between the first cavity and the second cavity, and orthographic projections of the second cavity, the third cavity and the first cavity on the bottom plate are gradually reduced; wherein the display module with at least one part of height is fixed in the first cavity, the display module with at least one part of height is located in the at least one third cavity, and the surface, close to one side of the bottom plate, of the cover plate is located in the second cavity.

Description

Technical Field

[0001] The utility model relates to the technical field of display. More specifically, it relates to a packaging box for a display module. Background Art

[0002] The overall packaging is a crucial link in the product transportation process, which directly affects the safe transportation and final quality of the product. Reasonable overall packaging can ensure that the product is not damaged during transportation and maintains a good appearance. The overall packaging is generally divided into inner packaging and outer packaging. Among them, the inner packaging needs to consider the packaging materials, structure, protection performance, load-bearing capacity, etc. In the related art, during the transportation of the inner packaging of the display module, it is easy to collide with the display module, thereby reducing the yield rate of the display module. Content of the Utility Model

[0003] The purpose of the utility model is to provide a packaging box for a display module to solve at least one of the problems existing in the prior art.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions:

[0005] In the first aspect of the utility model, a packaging box for a display module is provided. The packaging box includes a housing having a placement cavity and a cover body cooperatively arranged with the opening of the housing:

[0006] The housing includes a bottom plate and side wall plates arranged on the bottom plate,

[0007] In the direction from the bottom plate to the cover body, the side wall plates surround and form a plurality of cavities at different heights, including a first cavity close to the bottom plate, a second cavity close to the cover plate, and at least one third cavity located between the first cavity and the second cavity. The orthographic projections of the second cavity, the third cavity, and the first cavity on the bottom plate gradually decrease;

[0008] Wherein, at least a part of the height of the display module is fixed in the first cavity, at least another part of the height of the display module is located in at least one of the third cavities, and the surface of the cover plate close to the bottom plate side is located in the second cavity.

[0009] In an optional embodiment, the side wall plates include an outer side wall and an inner side wall closer to the center position than the outer side wall,

[0010] The inner side wall includes a plurality of stepped structures, a first step corresponding to the first cavity, a second step corresponding to the second cavity, and a plurality of third steps corresponding to the third cavity,

[0011] The first step includes a first horizontal plane and a first vertical plane perpendicular to the first horizontal plane. The first vertical plane surrounds and forms the first cavity, and the surface of the display module on the side away from the bottom plate is higher than the first horizontal plane.

[0012] In an alternative embodiment, the second step includes a second horizontal plane and a second vertical plane perpendicular to the second horizontal plane.

[0013] The second horizontal plane abuts against a partial surface of the cover body on the side facing the bottom plate.

[0014] The surface of the cover body on the side facing the bottom plate is at least located in the second cavity or the third cavity.

[0015] When the surface of the cover body on the side facing the bottom plate and the surface of the display module on the side away from the bottom plate are located in the same third cavity, there is a gap between the surface of the cover body on the side facing the bottom plate and the surface of the display module on the side away from the bottom plate.

[0016] In an alternative embodiment, the cover body includes a cover plate and a fixing plate provided on the side of the cover plate facing the bottom plate.

[0017] The orthographic projection of the cover plate on the bottom plate is located within the orthographic projection of the second cavity on the bottom plate. The cover plate includes:

[0018] A cover plate vertical surface, which abuts against the second vertical surface; and

[0019] A cover plate horizontal surface on the side facing the bottom plate, which abuts against the second horizontal surface;

[0020] The orthographic projection of the fixing plate on the bottom plate is located within the orthographic projection of the cover plate on the bottom plate and within the orthographic projection of the third cavity closest to the cover plate on the bottom plate.

[0021] The horizontal surface of the fixing plate on the side facing the bottom plate is located in the third cavity and has a gap with the surface of the display module on the side away from the bottom plate.

[0022] In an alternative embodiment, the orthographic projection of the cover plate on the bottom plate includes a long side portion projection and a short side portion projection. At the position of the short side portion projection, a raised handle is provided. The raised handle is a horizontal raised structure extending from the center of the cover plate to the edge.

[0023] In an alternative embodiment, a handle groove is formed at a position on the surface of the box body close to the cover plate corresponding to the raised handle. The handle groove extends from the surface of the housing close to the cover plate towards the bottom plate, and the groove surface of the handle groove close to the bottom plate is higher than the first horizontal plane of the first cavity.

[0024] In an alternative embodiment, the packaging box body further includes a fitting storage groove located on the side of the first cavity close to the bottom plate. The orthographic projection of the fitting storage groove on the bottom plate is located within the orthographic projection of the first cavity on the bottom plate. The surface of the fitting storage groove close to the bottom plate and the surface of the bottom plate away from the first cavity have a height.

[0025] In an alternative embodiment, the packaging box body further includes a partition member located on the first horizontal plane of the first cavity, separating the first cavity and the fitting storage groove. The display module is disposed on the surface of the partition member away from the bottom plate.

[0026] In an alternative embodiment, the partition member further includes a through hole penetrating the partition member.

[0027] In an alternative embodiment, the orthographic projection of the inner side wall on the bottom plate includes a long side wall projection and a short side wall projection. Avoidance grooves are provided at positions corresponding to the power supply and positioning posts of the display module in the long side wall projection, and the avoidance grooves are symmetrically arranged parallel to the central axis of the long side wall projection.

[0028] The beneficial effects of the present utility model are as follows:

[0029] In this embodiment, the structure of the packaging box body is designed to adopt a multi-cavity structure. On the one hand, the multi-cavity structure has strong support and the box body structure is relatively hard, and it is not easy to be damaged due to transportation, resulting in damage to the box body and the display module inside the box. On the other hand, the top surface and the bottom body of the display module in this embodiment are located in different cavities. The first cavity is used to limit the bottom of the display module, and the third cavity is used to protect the top surface of the display module, which can avoid damage to the light-emitting surface of the display module by the inner side wall of the shell. Moreover, there is a gap between the cover body and the top surface of the display module in this embodiment, which can avoid damage to the top surface of the display module, thus ensuring transportation safety. Description of the Drawings

[0030] The following further describes in detail the specific embodiments of the present utility model with reference to the accompanying drawings.

[0031] Figures 1 to 5 A schematic structural diagram of a packaging box body showing the related art;

[0032] Figure 6 A schematic cross-sectional view of the packaging box body according to an embodiment of the present utility model;

[0033] Figure 7 A schematic three-dimensional structural diagram of the packaging box body according to an embodiment of the present utility model;

[0034] Figure 8Schematic diagram showing the top view state of the display module according to an embodiment of the present utility model placed in a housing;

[0035] Figure 9 Schematic diagram showing the structure of the housing and the cover body cooperatively arranged according to an embodiment of the present utility model;

[0036] Figure 10 Schematic diagram showing the side view state of the cover body according to an embodiment of the present utility model;

[0037] Figure 11 Schematic diagram showing the top view state of the cover body according to an embodiment of the present utility model;

[0038] Figure 12 Schematic diagram showing the structure of the accessory slot and the partition member according to an embodiment of the present utility model;

[0039] Figure 13 Schematic diagram showing the structure of the avoidance slot according to an embodiment of the present utility model. Detailed implementation manners

[0040] In order to more clearly illustrate the present utility model, the present utility model will be further described below in conjunction with embodiments and drawings. Similar components in the drawings are denoted by the same reference numerals. Those skilled in the art should understand that the content specifically described below is illustrative rather than restrictive, and should not be used to limit the protection scope of the present utility model.

[0041] The overall packaging of the whole machine is a crucial link in the product transportation process, which directly affects the safe transportation and final quality of the product. Reasonable overall packaging can ensure that the product is not damaged during transportation and maintains a good appearance. The overall packaging is generally divided into inner packaging and outer packaging. Among them, the inner packaging needs to consider the packaging materials, structure, protection performance, load-bearing capacity, etc. In the related art, during the transportation of the inner packaging of the display module, it is easy to collide with the display module, thereby reducing the yield of the display module.

[0042] The display module includes components such as a box body, a display screen, a power supply, and wires. When it is delivered to the client, its packaging needs to meet requirements such as being convenient to carry and protecting the product. The display modules in the related art mainly use materials such as foaming materials and cardboard boxes. Among them, the foaming material is used to hold and position the product and provide a certain buffering effect, and it is the most important component in the whole set of packaging.

[0043] The foaming materials have excellent elasticity, wear resistance, chemical corrosion resistance and shockproof performance. Commonly used foaming materials include EPE (ethylene foam) / EPS (expandable polystyrene) / EPO (foamed polystyrene) / EVA (ethylene-vinyl acetate copolymer). Table 1 compares the characteristics of various foaming materials. Through comprehensive comparison, among them, the EPE material requires die-cutting because its material is relatively soft and cannot be formed by a milling machine; the EPS and EPO materials require mold opening and the mold opening cost is relatively high, and they are easy to be adopted when the quantity is large; the EVA material is easy to process and can be formed by molds and milling machines. For small-batch products, computer-controlled milling cutters are generally used for processing, and products of various shapes and sizes can be produced with accurate dimensions and small errors. Moreover, there is no need for die and mold costs, which reduces costs. The overall quantity of the whole machine for sample display is small, so the EVA material is preferably selected.

[0044] Table 1 Comparison of the Performance of Foaming Materials

[0045]

[0046] As Figures 1 to 5 shown in the packaging box structure of the related art, as Figure 1 shown, the packaging box 10 of the related art includes a bottom packaging box 11 and a packaging cover 12. In the process of transportation, the above structure has the following difficulties:

[0047] 1) The packaging box 10 selects the EPE material. This solution has good buffering performance, but the supporting performance is average, and the formed dimensions are prone to errors. Different-sized products require a corresponding die, and they cannot be compatible;

[0048] 2) As Figure 2 can be seen, the product slot 110 of the packaging box 10 does not avoid the edge of the display screen of the display module 200. When the display module 200 moves in the product slot 110, the light-emitting components at the edge of the display module can directly contact the packaging box 10; during the vibration process, the packaging box 10 is prone to rubbing against the display edge of the display module, resulting in the falling of the light-emitting elements of the display module.

[0049] 3) As Figure 3 and Figure 4 shown, the packaging box 10 is provided with a fitting slot 111, and no buffer layer is added above the fitting slot 111. When vibrating up and down, the fittings are easy to contact the box body and damage the box body;

[0050] 4) As Figure 1 shown, the packaging cover 12 of the packaging box 10 is in full contact with the light-emitting surface of the display module 200, and the edge is prone to rubbing and falling off, which has a transportation risk;

[0051] 5) As Figure 5As shown, there are part protrusions such as a power interface and positioning posts on the side of the display module 200. The inner side wall of the packaging box body 10 is not anti-foolproof designed, and an avoidance structure 112 is only provided on one side. When the display module 200 is packaged, it is easy to have a packaging misalignment, resulting in contact between the display module 200 and the packaging box body 10.

[0052] In view of this, this embodiment proposes a packaging box body for a display module to solve the above problems.

[0053] The first embodiment of the present utility model proposes a packaging box body 60 for a display module, as Figures 6 to 13 shown, the packaging box body 60 includes a housing 62 having a placement cavity and a cover body 61 cooperatively arranged with the opening of the housing 62:

[0054] The housing 62 includes a bottom plate 622 and side wall plates 621 arranged on the bottom plate 622,

[0055] In the direction from the bottom plate 622 to the cover body 61, the side wall plates 621 surround and form a plurality of cavities at different heights, including a first cavity 6231 close to the bottom plate 622, a second cavity 6232 close to the cover body 61, and at least one third cavity 6233 located between the first cavity 6231 and the second cavity 6232. The orthographic projections of the second cavity 6232, the third cavity 6233, and the first cavity 6231 on the bottom plate 622 gradually decrease;

[0056] Wherein, at least part of the height of the display module 200 is fixed in the first cavity 6231, and at least another part of the height of the display module 200 is located in at least one of the third cavities 6233. There is a gap between the surface of the cover body 61 facing the bottom plate 622 and the surface of the display module 200 away from the bottom plate 622.

[0057] This embodiment designs the structure of the packaging box body 60 and adopts a multi-cavity structure. On the one hand, the multi-cavity structure has strong support and the box body structure is relatively hard, and it is not easy to be damaged due to transportation, resulting in damage to the display module 200 inside the box. On the other hand, the top surface and the bottom body of the display module 200 in this embodiment are located in different cavities. The first cavity 6231 is used to limit the bottom of the display module 200, and the third cavity 6233 is used to protect the top surface of the display module 200, which can avoid damage to the light-emitting surface of the display module 200 by the inner side wall of the housing 62. Moreover, there is a gap between the cover body 61 and the top surface of the display module 200 in this embodiment, which avoids damage to the top surface of the display module 200, thus ensuring transportation safety.

[0058] In an optional embodiment, as Figures 6 to 8As shown, the side wall plate 621 includes an outer side wall 6212 and an inner side wall 6211 closer to the center position than the outer side wall 6212. Exemplarily, the outer side wall 6212 is a smooth surface, saving space occupancy and facilitating placement.

[0059] In this embodiment, the inner side wall 6211 includes a plurality of stepped structures, a first step 6241 corresponding to the first cavity 6231, a second step 6242 corresponding to the second cavity 6232, and a plurality of third steps 6243 corresponding to the third cavity 6233. That is to say, the stepped structure of the inner side wall 6211 surrounds and forms the first cavity 6231, the second cavity 6232, and a plurality of third cavities 6233 in this embodiment.

[0060] As Figure 6 and Figure 7 shown in the exemplary illustration, the inner side wall 6211 has three cavity structures, which are the first cavity 6231, a third cavity 6233, and the second cavity 6232 in sequence from the direction of the bottom plate 622 to the cover body 61. In this embodiment, the first step 6241 is the step structure closest to the bottom plate 622. The first step 6241 includes a first horizontal surface 62411 and a first vertical surface 62412 perpendicular to the first horizontal surface 62411. The first vertical surface 62412 surrounds and forms the first cavity 6231. A part of the height of the display module 200 is set to be limited within the first cavity 6231. The surface of the display module 200 on the side away from the bottom plate 622 is higher than the first horizontal surface 62411, avoiding knocking between the first vertical surface 62412 and the top surface of the display module 200, and ensuring the product yield of the display module 200.

[0061] In this embodiment, the second step 6242 is the step structure farthest from the bottom plate 622. As Figure 9 shown, the second step 6242 includes a second horizontal surface 62421 and a second vertical surface 62422 perpendicular to the second horizontal surface 62421. The second horizontal surface 62421 abuts against a part of the surface of the cover body 61 facing the bottom plate 622, and the second vertical surface 62422 abuts against the cover vertical surface of the cover body 61 to achieve the fixation between the housing 62 and the cover body 61.

[0062] In an alternative embodiment, the surface of the cover body 61 facing the bottom plate 622 is at least located in the second cavity 6232 or the third cavity 6233. That is to say, the height of the cover body 61 is not limited in this embodiment. In a multi-cavity structure, the cover body 61 can be snap-fitted into multiple cavities at the opening of the housing 62, but it is designed that there is a gap between the surface of the cover body 61 facing the bottom plate 622 and the surface of the display module 200 away from the bottom plate 622 to ensure the transportation safety of the product.

[0063] In an alternative embodiment, as Figure 9 shown, when the number of the third cavities 6233 is one and the cover body 61 extends from the second cavity 6232 to the third cavity 6233, in this structure, the surface of the cover body 61 facing the bottom plate 622 and the surface of the display module 200 away from the bottom plate 622 are located in the same third cavity 6233. Therefore, to avoid friction and collision of the cover body 61 on the top surface of the display module 200, a gap is provided between the surface of the cover body 61 facing the bottom plate 622 and the surface of the display module 200 away from the bottom plate 622 in this embodiment, so as to avoid damage to the display module 200 by the packaging box 60 while limiting the display module 200.

[0064] Based on the embodiment in which the number of the third cavities 6233 is one, the number of the third cavities 6233 in this embodiment can also be multiple. In this structure, the cover body 61 can extend into different third cavities 6233 from the display module 200, further expanding the interval between the two to avoid friction.

[0065] In an alternative embodiment, as Figure 10 shown, the cover body 61 includes a cover plate 611 and a fixing plate 612 provided on the side of the cover plate 611 facing the bottom plate 622. The cover plate 611 in this embodiment has a "T" - shaped structure.

[0066] The cover plate 611 includes: a cover plate vertical surface 6111 in contact with the second vertical surface 62422; and a cover plate horizontal surface 6112 on the side facing the bottom plate 622 in contact with the second horizontal surface 62421.

[0067] In this embodiment, the orthographic projection of the cover plate 611 on the bottom plate 622 is located in the orthographic projection of the second cavity 6232 on the bottom plate 622. A step is formed between the cover plate horizontal surface 6112 of the cover plate 611 and the fixing surface vertical surface of the fixing plate 612. Under the limitation of the second step 6242, the cover plate 611 is fixed in the second cavity 6232.

[0068] In an alternative embodiment, as Figure 9 and Figure 10As shown, the orthographic projection of the fixing plate 612 on the bottom plate 622 is located in the orthographic projection of the cover plate 611 on the bottom plate 622, and is located in the orthographic projection of the third cavity 6233 closest to the cover plate 611 on the bottom plate 622. That is to say, the fixing plate 612 may not be in contact with the side wall surface corresponding to the third step 6243, but there is a gap between the fixing portion and the side wall surface corresponding to the third step 6243, thereby reducing the impact of the fixing plate 612 on the shell 62 during transportation.

[0069] In this embodiment, the fixing plate 612 is a protruding structure extending from the surface of the cover plate 611 toward one side of the bottom plate 622. The horizontal plane of the fixing plate 612 toward the bottom plate 622 is located in the third cavity 6233, and there is a gap between the surface of the display module 200 away from the bottom plate 622 to avoid damage to the display module 200 by the packaging box 60.

[0070] In an optional embodiment, if Figure 10 and Figure 11 As shown, the orthographic projection of the cover plate 611 on the bottom plate 622 includes a long side projection and a short side projection, and a raised handle 6113 is provided at the position where the short side projection is located, and the raised handle 6113 is a horizontal raised structure extending from the center to the edge of the cover plate 611. In this embodiment, the raised handle 6113 is provided on the short side to facilitate operation and improve work efficiency.

[0071] In an optional embodiment, if Figure 8 and Figure 12 As shown, a handle groove 625 is provided on the surface of the shell 62 close to the cover plate 611 at a position corresponding to the raised handle 6113. On the one hand, the handle groove 625 is used to place the raised handle 6113 of the cover body 61 to avoid the raised handle 6113 protruding from the shell 62 and being inconvenient to use. On the other hand, the handle groove 625 facilitates the picking up of the entire product and improves efficiency.

[0072] In this embodiment, the handle groove 625 extends from the surface of the shell 62 close to the cover plate 611 toward the bottom plate 622, and the groove surface of the handle groove 625 close to the bottom plate 622 is higher than the first horizontal surface 62411 of the first cavity 6231, that is, the depth of the handle groove 625 is less than the total cavity depth of the multi-cavity structure, thereby avoiding friction between the cover body 61 and the top surface of the display module 200 when the cover body 61 and the shell 62 are matched.

[0073] In an optional embodiment, if Figure 7 and Figure 12As shown, the packaging box body 60 further includes a fitting storage groove 626 located on the side of the first cavity 6231 close to the bottom plate 622. The orthographic projection of the fitting storage groove 626 on the bottom plate 622 is located within the orthographic projection of the first cavity 6231 on the bottom plate 622. The surface of the fitting storage groove 626 close to the bottom plate 622 and the surface of the bottom plate 622 away from the first cavity 6231 have a height. As Figure 7 shown, the fitting storage groove 626 is used to store the fittings of the display module 200, such as power supplies, wires and other materials. It is located below the first cavity 6231 and has a certain thickness from the bottom surface of the bottom plate 622, ensuring the overall strength of the packaging box body 60.

[0074] In this embodiment, during transportation, the fittings of the display module 200 are prone to shaking, resulting in collisions between the fittings and the packaging box body 60. In an alternative embodiment, the packaging box body 60 further includes a partition 627 located on the first horizontal plane 62411 of the first cavity 6231, separating the first cavity 6231 and the fitting storage groove 626. The display module 200 is disposed on the surface of the partition 627 away from the bottom plate 622. Therefore, in this embodiment, the first cavity 6231 and the fitting storage groove 626 are separated by the partition 627, increasing the buffering performance and preventing the fittings from scratching the packaging box body 60.

[0075] In an alternative embodiment, the partition 627 further includes a through hole 6271 penetrating the partition 627. As Figure 12 shown, the through hole 6271 is disposed at the central position of the partition 627 and has a circular orthographic projection, or the through hole 6271 is disposed on the surface of the partition 627 close to the inner side wall 6211 and has a semi-circular orthographic projection. Those skilled in the art can design according to actual applications, which will not be elaborated here.

[0076] In an alternative embodiment, as Figure 13 shown, the orthographic projection of the inner side wall 6211 on the bottom plate 622 includes a long side wall projection and a short side wall projection. Avoidance grooves 628 are formed at positions corresponding to the power supply and positioning posts of the display module 200 in the long side wall projection. The avoidance grooves 628 are symmetrically arranged with respect to the central axis parallel to the long side wall projection.

[0077] As Figure 13As shown, the avoidance groove 628 is provided on the long side of the housing 62 and is symmetrically arranged on the long side for anti-fooling design to avoid packaging negligence and improve the efficiency of packaging operations, transportation, and storage. In this embodiment, the avoidance groove 628 is used to avoid the power supply and positioning posts. The orthographic projection of the avoidance groove 628 on the bottom plate 622 covers the orthographic projections of the power supply, positioning posts, and protruding accessories of the display module 200 on the bottom plate 622 to protect each accessory of the display module 200.

[0078] Based on the packaging box 60 of the embodiment of the present utility model, EVA material can be used. The EVA material has strong support, good buffering performance, and does not require mold opening. Utilizing the good compatibility of the EVA material, for small batches of products with different sizes, the packaging box 60 of different sizes can be directly manufactured by a computer-controlled milling machine, saving the costs of EPE die molds and EPS / EPO molds and effectively reducing costs.

[0079] In this embodiment, the structure of the packaging box 60 is designed to adopt a multi-cavity structure. On the one hand, the multi-cavity structure has strong support and the box structure is relatively hard, making it not easy to be damaged due to transportation for the box and the display module 200 inside the box. On the other hand, the top surface and the bottom body of the display module 200 in this embodiment are located in different cavities. The first cavity 6231 is used to limit the bottom of the display module 200, and the third cavity 6233 is used to protect the top surface of the display module 200, which can avoid damage to the light-emitting surface of the display module 200 caused by the inner side wall 6211 of the housing 62. Moreover, there is a gap between the cover plate 611 and the top surface of the display module 200 in this embodiment to avoid damage to the top surface of the display module 200, thus ensuring transportation safety.

[0080] Based on the packaging box 60 of the embodiment of the present utility model, this embodiment innovates from the material and structure of the packaging box 60. Structurally, considering the weakness of the product edge of the display module 200, the packaging material structure is innovated to avoid direct contact between the packaging box 60 and the product edge of the display module 200 to protect the display module 200. The packaging box 60 of this embodiment effectively solves the problems of poor support strength, high transportation risk, and high cost of the packaging box 60 in the related art, provides safe and reliable protection for the transportation of the display module 200, improves the transportation efficiency, and reduces the packaging material cost at the same time.

[0081] In the description of the present utility model, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the said element.

[0082] Obviously, the above-mentioned embodiments of the present utility model are only examples for clearly illustrating the present utility model, rather than limitations on the implementation modes of the present utility model. For those of ordinary skill in the art, other different forms of changes or variations can be made on the basis of the above description. It is impossible to list all the implementation modes here. Any obvious changes or variations derived from the technical solutions of the present utility model still fall within the protection scope of the present utility model.

Claims

1. A packaging box for a display module, characterized in that, The packaging box body includes a housing having a placement cavity and a cover body cooperatively arranged with the opening of the housing: The housing includes a bottom plate and side wall plates arranged on the bottom plate. In the direction from the bottom plate to the cover body, the side wall plates surround and form a plurality of cavities at different heights, including a first cavity near the bottom plate, a second cavity near the cover body, and at least one third cavity located between the first cavity and the second cavity. The orthographic projections of the second cavity, the third cavity, and the first cavity on the bottom plate gradually decrease. Wherein, at least part of the height of the display module is fixed in the first cavity, and at least another part of the height of the display module is located in at least one of the third cavities. The surface of the cover plate on the side close to the bottom plate is located in the second cavity.

2. The packaging box according to claim 1, wherein, The side wall plates include an outer side wall and an inner side wall closer to the center position than the outer side wall. The inner side wall includes a plurality of stepped structures, a first step corresponding to the first cavity, a second step corresponding to the second cavity, and a plurality of third steps corresponding to the third cavity. The first step includes a first horizontal plane and a first vertical plane perpendicular to the first horizontal plane. The first vertical plane surrounds and forms the first cavity, and the surface of the display module on the side away from the bottom plate is higher than the first horizontal plane.

3. The packaging box according to claim 2, characterized in that, The second step includes a second horizontal plane and a second vertical plane perpendicular to the second horizontal plane. The second horizontal plane abuts against a partial surface of the cover body on the side facing the bottom plate. The surface of the cover body on the side facing the bottom plate is at least located in the second cavity or the third cavity. When the surface of the cover body on the side facing the bottom plate and the surface of the display module on the side away from the bottom plate are located in the same third cavity, there is a gap between the surface of the cover body on the side facing the bottom plate and the surface of the display module on the side away from the bottom plate.

4. The packaging box according to claim 3, characterized in that, The cover body includes a cover plate and a fixing plate arranged on the side of the cover plate facing the bottom plate. The orthographic projection of the cover plate on the bottom plate is located in the orthographic projection of the second cavity on the bottom plate. The cover plate includes: A cover plate vertical surface that abuts against the second vertical surface; and A cover plate horizontal surface on the side facing the bottom plate that abuts against the second horizontal plane. The orthographic projection of the fixing plate on the bottom plate is located in the orthographic projection of the cover plate on the bottom plate and is located in the orthographic projection of the third cavity closest to the cover plate on the bottom plate. The horizontal plane of the fixing plate on the side facing the bottom plate is located in the third cavity and has a gap with the surface of the display module on the side away from the bottom plate.

5. The packaging box according to claim 4, characterized in that, The orthographic projection of the cover plate on the bottom plate includes a long side portion projection and a short side portion projection. A raised handle is provided at the position of the short side portion projection. The raised handle is a horizontal raised structure extending from the center of the cover plate to the edge.

6. The packaging box according to claim 5, characterized in that, A handle groove is opened at the position of the box body on the side close to the cover plate corresponding to the raised handle. The handle groove extends from the surface of the housing on the side close to the cover plate towards the bottom plate direction. The groove surface of the handle groove on the side close to the bottom plate is higher than the first horizontal plane of the first cavity.

7. The packaging box according to claim 6, characterized in that, The packaging box body further includes a fitting storage groove located on the side of the first cavity close to the bottom plate, and the orthographic projection of the fitting storage groove on the bottom plate is located within the orthographic projection of the first cavity on the bottom plate. The surface of the fitting storage groove close to the bottom plate side and the surface of the bottom plate far from the first cavity side have a height.

8. The packaging box according to claim 7, characterized in that The packaging box body further includes a partition member located on the first horizontal plane of the first cavity, separating the first cavity and the fitting storage groove, and the display module is disposed on the surface of the partition member far from the bottom plate side.

9. The packaging box according to claim 8, wherein, The partition member further includes a through hole penetrating the partition member.

10. The packaging box according to claim 5, characterized in that, The orthographic projection of the inner side wall on the bottom plate includes a long side wall projection and a short side wall projection. Avoidance grooves are provided at positions corresponding to the power supply and positioning posts of the display module in the long side wall projection, and the avoidance grooves are symmetrically arranged with the center parallel to the long side wall projection as the axis.

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