Folding compartment

Abstract

The utility model relates to the technical field of container houses, and provides a folding compartment which comprises a bottom plate. The top plate is provided with a plurality of first sliding grooves and can ascend and descend; one end of the first side plate is hinged to one end of the bottom plate, the other end of the first side plate is rotationally and slidably arranged at one end of the top plate, first protrusions are arranged on the two sides of the first side plate and used for being clamped into the first sliding grooves, and after the top plate ascends and descends, the first side plate is driven to rotate; one end of the second side plate is hinged to the other end of the bottom plate, the other end of the second side plate is rotationally and slidably arranged at the other end of the top plate, second protrusions are arranged on the two sides of the second side plate, after the second side plate rotates, the second protrusions are used for being clamped into the first sliding grooves, and after the top plate ascends and descends, the second side plate is driven to rotate. By means of the technical scheme, the problem that in the prior art, in the unfolding process of a folding compartment through hoisting equipment, continuous manual monitoring is needed to ensure precise alignment of house side plates is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of container houses, and in particular to a folding container. Background Art

[0002] Containers have become a preferred option for temporary housing on construction sites, in field operations, and even during disaster reconstruction. To improve assembly efficiency, a new type of foldable container housing has emerged. This system, deployed using hoisting equipment, greatly simplifies on-site installation, requiring only basic screw tightening for quick assembly, significantly improving efficiency. However, this presents a challenge: the hoisting process requires extremely high stability, requiring constant manual monitoring to ensure precise alignment of the housing's side panels. This undoubtedly increases operational uncertainty and reliance on human resources. Utility Model Content

[0003] The utility model provides a folding box, which solves the problem in the related art that during the unfolding process of the folding box using hoisting equipment, continuous manual monitoring is required to ensure the accurate alignment of the side panels of the house.

[0004] The technical solution of the utility model is as follows:

[0005] A folding box, comprising:

[0006] base plate;

[0007] A top plate having a plurality of first slide slots, wherein the top plate can be raised and lowered;

[0008] A first side panel, one end of which is hingedly mounted on one end of the bottom panel, and the other end of which is rotatably and slidably mounted on one end of the top panel. The first side panel has first protrusions on both sides, and the first protrusions are configured to engage with the first sliding grooves. When the top panel is raised or lowered, the first side panel is driven to rotate.

[0009] The second side plate has one end hingedly set on the other end of the bottom plate, and the other end is rotatably and slidably set on the other end of the top plate. The second side plate has second protrusions on both sides. After the second side plate rotates, the second protrusions are used to be stuck in the first sliding groove. After the top plate is raised or lowered, the second side plate is driven to rotate.

[0010] As a further technical solution, after the first side plate and the second side plate rotate, the first protrusion and the second protrusion slide along the first sliding groove.

[0011] As a further technical solution, it also includes:

[0012] a plurality of baffles, each correspondingly disposed on both sides of the first slide groove; the baffles and the first slide groove form a sliding groove and a clamping groove; the sliding groove is connected to the sliding groove; the first protrusion and the second protrusion slide along the sliding groove;

[0013] There are a plurality of rotating plates, which are correspondingly arranged on both sides of the first protrusion and the second protrusion. After the rotating plates are rotated, they are used to be clamped into the clamping grooves.

[0014] As a further technical solution, it also includes:

[0015] There are a plurality of elastic members, one end of which is arranged on the rotating plate and the other end is arranged on the first protrusion or the second protrusion. The elastic member is used to provide a force for resetting the rotating plate.

[0016] As a further technical solution, the top plate has a second slide groove on both sides and also includes several connecting parts. One end of the connecting part is movably set on the top plate, and the other end is rotatably set on the first side plate or the second side plate. The top plate drives the first side plate and the second side plate to rotate through the connecting parts.

[0017] As a further technical solution, the connecting piece includes:

[0018] a first connecting rod, one end of which is movably disposed on the top plate;

[0019] The second connecting rod has one end hingedly arranged on the first side plate or the second side plate, and the other end hingedly arranged on the other end of the first connecting rod.

[0020] As a further technical solution, it also includes:

[0021] The rotating wheel is rotatably arranged on one end of the first connecting rod, and the one end of the first connecting rod is movably arranged on the top plate through the rotating wheel.

[0022] As a further technical solution, the top plate, the bottom plate, the first side plate and the second side plate together form a containing cavity, further comprising:

[0023] There are two third side panels, which are hingedly arranged on both sides of the bottom plate. After the third side panels are rotated, the containing cavity is closed.

[0024] As a further technical solution, it also includes:

[0025] There are several rotating shafts, which are arranged on the base plate and have guide grooves. One end of the first side plate and the second side plate is movably arranged in the guide grooves, and the first side plate and the second side plate are hingedly arranged on the base plate through the guide grooves.

[0026] As a further technical solution, the guide groove has a first vertical groove, a transverse groove and a second vertical groove that are connected in sequence, and further includes:

[0027] A fixing column is arranged on the first side panel or the second side panel. After the first side panel and the second side panel are folded, the fixing column is located in the second vertical groove. After the first side panel and the second side panel are unfolded, the fixing column is located in the first vertical groove.

[0028] The working principle and beneficial effects of the utility model are as follows:

[0029] In the present invention, in order to solve the problem in the related art that the folding box needs continuous manual monitoring to ensure the accurate alignment of the house side panels during the unfolding process using hoisting equipment, after the folding box in this solution is folded, the first side panel and the second side panel are located between the top panel and the bottom panel, and a baffle can be designed on both sides of the first side panel and the second side panel. The baffle can not only increase the sealing of the folding box, but also provide conditions for the installation of the first protrusion or the second protrusion. During the unfolding process of the first side panel and the second side panel, the first protrusion and the second protrusion can be stuck in the first slide groove. In order to ensure stability, the first slide groove can be set on both sides of the top panel, the first protrusion can be set on both sides of the first side panel, and the second protrusion can be set on both sides of the second side panel. The other ends of the first side panel and the second side panel can be unfolded along the first slide groove, which prevents the top panel from offsetting with the first side panel and the second side panel, reduces the time for manual adjustment when the folding box is unfolded, and thus improves the unfolding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The preferred embodiments will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present invention.

[0031] Figure 1 This is a schematic diagram of the structure of the utility model;

[0032] Figure 2 This is a schematic diagram of the semi-folding structure of the utility model;

[0033] Figure 3 This is a schematic diagram of the structure of the utility model when viewed from above;

[0034] Figure 4 for Figure 3 A magnified schematic diagram of point A;

[0035] Figure 5 This is a schematic diagram of the partial structure of the first chute of the utility model;

[0036] Figure 6 This is a schematic diagram of the second protrusion structure of the utility model;

[0037] Figure 7 This is a schematic diagram of the elastic member structure of the utility model;

[0038] Figure 8 This is a schematic diagram of the structure of the connector of the utility model;

[0039] Figure 9 for Figure 8 A magnified schematic diagram of point B;

[0040] Figure 10 This is a schematic diagram of the shaft structure of the utility model;

[0041] Figure 11 for Figure 10 Enlarged schematic diagram of point C.

[0042] In the figure: 100, bottom plate, 200, top plate, 210, first slide groove, 300, first side plate, 310, first protrusion, 400, second side plate, 410, second protrusion, 500, baffle, 211, sliding groove, 212, clamping groove, 600, rotating plate, 700, elastic member, 220, second slide groove, 800, connecting member, 810, first connecting rod, 820, second connecting rod, 900, rotating wheel, 110, containing cavity, 1000, third side plate, 1100, rotating shaft, 1110, guide groove, 1111, first vertical groove, 1112, horizontal groove, 1113, second vertical groove, 1200, fixing column. DETAILED DESCRIPTION

[0043] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, they can also be understood as further technical solutions without paying creative work. In some figures, components with the same structure or function are schematically illustrated, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0044] It should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0045] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0046] Reference Figures 1 to 11 , which is a first embodiment of the present utility model, a folding box is proposed, including: a bottom plate 100; a top plate 200, having a plurality of first sliding grooves 210, and the top plate 200 can be raised and lowered; a first side plate 300, one end of which is hingedly set on one end of the bottom plate 100, and the other end is rotatably and slidably set on one end of the top plate 200, and the first side plate 300 has first protrusions 310 on both sides, and the first protrusions 310 are used to be stuck in the first sliding grooves 210, and after the top plate 200 is raised and lowered, the first side plate 300 is driven to rotate; a second side plate 400, one end of which is hingedly set on the other end of the bottom plate 100, and the other end is rotatably and slidably set on the other end of the top plate 200, and the second side plate 400 has second protrusions 410 on both sides, and after the second side plate 400 rotates, the second protrusion 410 is used to be stuck in the first sliding grooves 210, and after the top plate 200 is raised and lowered, the second side plate 400 is driven to rotate.

[0047] In this embodiment, after unfolding, the folding box in the prior art is often fixed by bolts between the top and side panels. In the event of strong winds, if only the bolts are fixed, the bolts may break due to the swaying of the top panel, causing damage to the folding box. To solve the problem of the related art that the folding box needs continuous manual monitoring to ensure the precise alignment of the house side panels during the unfolding process using lifting equipment, the folding box in this solution is folded. The first side panel 300 and the second side panel 400 are located between the top panel 200 and the bottom panel 100. A retaining bar can be designed on both sides of the first side panel 300 and the second side panel 400. The retaining bar can not only improve the sealing of the folding box, but also provide conditions for the installation of the first protrusion 310 or the second protrusion 410. During the deployment of the first and second side panels 300 and 400, the first and second protrusions 310 and 410 can be retained within the first chute 210. To ensure stability, the first chute 210 can be provided on both sides of the top panel 200, and the first and second protrusions 310 and 410 can be provided on both sides of the first and second side panels 300 and 400, respectively. The other ends of the first and second side panels 300 and 400 can be deployed along the first chute 210, preventing the top panel 200 from deviating from the first and second side panels 300 and 400. This reduces the time required for manual adjustment during deployment of the folding compartment, thereby improving deployment efficiency. In this embodiment, the first and second protrusions 310 and 410 can enhance the compressive strength of the connection between the top panel 200, the first and second side panels 300, and the second side panels 400. In strong winds, the first and second protrusions 310 and 410 can act as bolts to disperse wind force, thereby increasing the service life of the folding compartment.

[0048] Furthermore, after the first side plate 300 and the second side plate 400 rotate, the first protrusion 310 and the second protrusion 410 slide along the first sliding groove 210 .

[0049] In this embodiment, in order to reduce the manual intervention time when unfolding the folding compartment, this embodiment increases the height of the first protrusion 310 and the second protrusion 410. When the first side panel 300 and the second side panel 400 are rotated to a certain angle, the first protrusion 310 and the second protrusion 410 can be partially stuck in the sliding groove. In the subsequent rotation process of the first side panel 300 and the second side panel 400, the first protrusion 310 and the second protrusion 410 slide along the first sliding groove 210 until the first side panel 300 and the second side panel 400 are fully unfolded. The first protrusion 310 and the second protrusion 410 are stuck in the first sliding groove 210. The first protrusion 310 and the second protrusion 410 can limit the horizontal displacement of the top panel 200. At the same time, since the first protrusion 310 and the second protrusion 410 are stuck in the first sliding groove 210, the first side panel 300 and the second side panel 400 will not be horizontally misaligned during rotation, and no additional adjustment is required.

[0050] Furthermore, it also includes: a plurality of baffles 500, which are correspondingly arranged on both sides of the first slide groove 210, the baffles 500 and the first slide groove 210 forming a sliding groove 211 and a clamping groove 212, the sliding grooves 211 are connected to the sliding grooves 211, and the first protrusions 310 and the second protrusions 410 slide along the sliding grooves 211;

[0051] There are a plurality of rotating plates 600 , which are correspondingly rotatably arranged on both sides of the first protrusion 310 and the second protrusion 410 . After the rotating plates 600 are rotated, they are used to be clamped into the clamping groove 212 .

[0052] When the first and second side panels 300 and 400 are fully unfolded, that is, rotated to 90 degrees with the bottom panel 100 and the bottom panel 100, the top panel 200 needs to be lowered for a certain distance to ensure that the top panel 200 is completely fitted with the first and second side panels 300 and 400 to achieve a seal. After the top panel 200 is lowered, since the distance between the two baffles 500 is less than the width of the two rotating panels 600, the baffles 500 will limit the rotating panel 600, causing the rotating panel 600 to rotate. After the rotating panel 600 rotates, it can extend into the engaging groove 212 to achieve engagement.

[0053] Furthermore, it also includes: a plurality of elastic members 700 , one end of which is arranged on the rotating plate 600 and the other end is arranged on the first protrusion 310 or the second protrusion 410 . The elastic member 700 is used to provide a force for restoring the rotating plate 600 .

[0054] In this embodiment, in order to strengthen the structure and ensure that the two rotating plates 600 can bounce up and cannot be separated from the locking groove 212 after entering the locking groove 212, an elastic member 700 is designed between the rotating plate 600 and the first protrusion 310 or the second protrusion 410. The elastic member 700 can be but is not limited to a torsion spring. Due to the action of the elastic member 700, after the rotating plate 600 completely enters the locking groove 212, the elastic member 700 immediately resets, driving the rotating plate 600 to reset, so that the rotating plate 600 is locked in the locking groove 212.

[0055] Furthermore, both sides of the top plate 200 have a second slide groove 220, and also include a number of connecting parts 800, one end of the connecting part 800 is movably set on the top plate 200, and the other end is rotatably set on the first side plate 300 or the second side plate 400. The top plate 200 drives the first side plate 300 and the second side plate 400 to rotate through the connecting part 800.

[0056] In this embodiment, in order to enable the other ends of the first side panel 300 and the second side panel 400 to slide and be hinged on the top panel 200, this solution connects the top panel 200 and the second side panel 400 or the second side panel 400 through a connecting member 800. The connecting member 800 itself has a telescopic effect. After telescoping, the top end surfaces of the other ends of the first side panel 300 and the second side panel 400 have different distances from the top panel 200 due to different rotation angles. Through the telescopic and swinging effects of the connecting member 800, the conversion of the first side panel 300, the second side panel 400 and the top panel 200 into different states is realized.

[0057] Furthermore, the connecting member 800 includes: a first connecting rod 810, one end of which is movably set on the top plate 200; a second connecting rod 820, one end of which is hingedly set on the first side plate 300 or the second side plate 400, and the other end is hingedly set on the other end of the first connecting rod 810.

[0058] In this embodiment, in order to realize the extension and swing of the connecting member 800, the connecting member 800 is designed as a connecting rod structure. After the rotation angle between the first connecting rod 810 and the second connecting rod 820 changes, the distance between one end of the first connecting rod 810 and the middle end of the second connecting rod 820 is different, thereby realizing the extension and contraction of the connecting member 800. When the hoisting device is lifting the top plate 200, the angle between the first connecting rod 810 and the second connecting rod 820 is 180 degrees. As the top plate 200 is lifted, the angle between the first connecting rod 810 and the second connecting rod 820 is 180 degrees. The top plate 200 is continuously lifted, and one end of the first connecting rod 810 slides along the top plate 200. One end of the first connecting rod 810 at both ends of the top plate 200 moves away from each other until the first side plate 300 and the second side plate 400 are rotated to an angle where they cannot continue to rotate. The first side plate 300 and the second side plate 400 are manually assisted to rotate to 90°, and finally the top plate 200 is lowered so that the top plate 200 is overlapped on the first side plate 300 and the second side plate 400. At this time, an acute angle is formed between the first connecting rod 810 and the second connecting rod 820.

[0059] Furthermore, it also includes: a rotating wheel 900 rotatably arranged on one end of the first connecting rod 810 , and one end of the first connecting rod 810 is movably arranged on the top plate 200 through the rotating wheel 900 .

[0060] In this embodiment, in order to reduce friction, a rotating wheel 900 is designed on one end of the first connecting rod 810. Through the rotation of the rotating wheel 900, one end of the first connecting rod 810 can slide on the top plate 200, and then after the top plate 200 is lifted, the first side panel 300 and the second side panel 400 can be smoothly unfolded.

[0061] Furthermore, the top plate 200, the bottom plate 100, the first side plate 300 and the second side plate 400 together form a containing cavity 110, and also include: a third side plate 1000, having two, correspondingly hingedly arranged on both sides of the bottom plate 100, after the third side plate 1000 rotates, the containing cavity 110 is closed.

[0062] In this embodiment, the main frame of the temporary container house is made of a durable material (such as high-strength steel or lightweight aluminum alloy). The top panel 200, bottom panel 100, and two opposing first and second side panels 300 and 400 together form a basic container chamber 110. These panels are designed with well-sealed edges, ensuring effective wind and water resistance when closed, meeting the basic requirements of temporary living or storage. Two third side panels 1000 are hingedly mounted on either side of the bottom panel 100. These third side panels 1000 can rotate along pre-set hinge axes, facilitating rapid assembly and disassembly of the container house. To close the container chamber 110, the user manually or through a simple mechanical device (such as a ratchet or hydraulic strut) rotates the third side panels 1000 about the hinge points until they securely fit the first or second side panels 300 and 400. The pivoting and closing design of the third side panels 1000 allows the temporary container house to flexibly adjust its internal spatial layout to suit different application scenarios. For example, when used as a temporary office, it can be completely closed to create a private space. When used as a temporary warehouse or exhibition space, partially opening the third side panel 1000 enhances air circulation and display quality. The third side panel 1000 and its hinged portion are constructed of corrosion-resistant, lightweight, and high-strength materials to ensure stability and durability during long-term use. The hinge is dustproof and waterproof, reducing maintenance requirements. This embodiment not only enhances structural flexibility and allows for diverse spatial uses, but also ensures overall stability and environmental adaptability.

[0063] The present invention further includes: a plurality of rotating shafts 1100, which are disposed on the base plate 100 and have guide slots 1110. One end of the first side plate 300 and the second side plate 400 are movably disposed in the guide slots 1110, and the first side plate 300 and the second side plate 400 are hingedly disposed on the base plate 100 via the guide slots 1110. The guide slots 1110 have a first vertical slot 1111, a transverse slot 1112, and a second vertical slot 1113 that are sequentially connected. The present invention further includes: a fixing post 1200, which is disposed on the first side plate 300 or the second side plate 400. When the first side plate 300 and the second side plate 400 are folded, the fixing post 1200 is located in the second vertical slot 1113. When the first side plate 300 and the second side plate 400 are unfolded, the fixing post 1200 is located in the first vertical slot 1111.

[0064] In this embodiment, the base plate 100 is provided with several rotating shafts 1100. The guide slots 1110 include a first vertical slot 1111, a transverse slot 1112, and a second vertical slot 1113, forming a continuous track system. One end of the first side panel 300 and the second side panel 400 fits neatly into the guide slots 1110. This not only defines the side panel's movement trajectory but also achieves an articulated connection with the base plate 100, significantly enhancing the structural flexibility and stability. The first side panel 300 and the second side panel 400 can move along the guide slots 1110 to transition from unfolded to folded. When folding, the first side panel 300 and the second side panel 400 slide along the first vertical slot 1111 to the transverse slot 1112 and then rotate to the second vertical slot 1113. During this process, the movement of the first side panel 300 and the second side panel 400 is guided by the guide slots 1110, ensuring a smooth and precise folding process. Conversely, the unfolding operation also proceeds along the opposite path, ensuring simple and quick operation. Fixing posts 1200 are provided on the first side panel 300 or the second side panel 400 to retain the first side panel 300 and the second side panel 400 within the guide groove 1110. This embodiment not only greatly enhances the foldability of the temporary container house and increases the flexibility of space utilization, but also ensures structural stability and ease of operation.

[0065] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, and all of these should be included in the scope of the claims of the present invention.

Claims

1. A folding box, characterized in that: include: Bottom plate (100); A top plate (200) having a plurality of first slide grooves (210), wherein the top plate (200) can be raised and lowered; A first side plate (300), one end of which is hingedly arranged on one end of the bottom plate (100), and the other end of which is rotatably and slidably arranged on one end of the top plate (200), the first side plate (300) having first protrusions (310) on both sides, the first protrusions (310) being used to be inserted into the first sliding grooves (210), and when the top plate (200) is raised or lowered, the first side plate (300) is driven to rotate; A second side plate (400) has one end hingedly arranged on the other end of the bottom plate (100), and the other end rotatably and slidably arranged on the other end of the top plate (200). The second side plate (400) has second protrusions (410) on both sides. After the second side plate (400) rotates, the second protrusions (410) are used to be inserted into the first sliding grooves (210). After the top plate (200) is raised or lowered, the second side plate (400) is driven to rotate.

2. A folding box according to claim 1, characterized in that: After the first side plate (300) and the second side plate (400) rotate, the first protrusion (310) and the second protrusion (410) slide along the first sliding groove (210).

3. A folding box according to claim 1, characterized in that: Also includes: A plurality of baffles (500) are provided on both sides of the first slide groove (210) respectively. The baffles (500) and the first slide groove (210) form a slide groove (211) and a clamping groove (212). The slide grooves (211) are connected to each other. The first protrusion (310) and the second protrusion (410) slide along the slide groove (211); The rotating plates (600) are provided in a plurality and are rotatably arranged on both sides of the first protrusion (310) and the second protrusion (410) in correspondence. After the rotating plates (600) are rotated, they are used to be snapped into the snap-fitting grooves (212).

4. A folding box according to claim 3, characterized in that: Also includes: The elastic member (700) comprises a plurality of elastic members, one end of which is arranged on the rotating plate (600) and the other end of which is arranged on the first protrusion (310) or the second protrusion (410). The elastic member (700) is used to provide a force for resetting the rotating plate (600).

5. A folding box according to claim 1, characterized in that: The top plate (200) has second slide grooves (220) on both sides, and also includes a plurality of connecting members (800), one end of the connecting member (800) is movably arranged on the top plate (200), and the other end is rotatably arranged on the first side plate (300) or the second side plate (400), and the top plate (200) drives the first side plate (300) and the second side plate (400) to rotate through the connecting member (800).

6. A folding box according to claim 5, characterized in that: The connecting piece (800) comprises: A first connecting rod (810), one end of which is movably disposed on the top plate (200); A second connecting rod (820) has one end hingedly arranged on the first side plate (300) or the second side plate (400), and the other end hingedly arranged on the other end of the first connecting rod (810).

7. A folding box according to claim 6, characterized in that: Also includes: The rotating wheel (900) is rotatably arranged on one end of the first connecting rod (810), and one end of the first connecting rod (810) is movably arranged on the top plate (200) through the rotating wheel (900).

8. A folding box according to claim 1, characterized in that: The top plate (200), the bottom plate (100), the first side plate (300) and the second side plate (400) together form a containing cavity (110), further comprising: The third side panels (1000) have two portions, which are hingedly arranged on both sides of the bottom panel (100) respectively; after the third side panels (1000) rotate, they close the containing cavity (110).

9. A folding box according to claim 1, characterized in that: Also includes: A plurality of rotating shafts (1100) are provided on the bottom plate (100) and have a guide groove (1110), one end of the first side plate (300) and the second side plate (400) being movably provided in the guide groove (1110), and the first side plate (300) and the second side plate (400) being hingedly provided on the bottom plate (100) via the guide groove (1110).

10. A folding box according to claim 9, characterized in that: The guide groove (1110) comprises a first vertical groove (1111), a transverse groove (1112) and a second vertical groove (1113) which are connected in sequence, and further comprises: A fixing column (1200) is arranged on the first side panel (300) or the second side panel (400); when the first side panel (300) and the second side panel (400) are folded, the fixing column (1200) is located in the second vertical groove (1113); when the first side panel (300) and the second side panel (400) are unfolded, the fixing column (1200) is located in the first vertical groove (1111).

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