Box body

Abstract

The utility model provides a box, which belongs to the technical field of LED display screens, and comprises box bodies, a first splicing assembly and a second splicing assembly, when the first splicing assembly is installed on the box bodies, the two box bodies can be vertically spliced, and when the second splicing assembly is installed on the box bodies, the two box bodies can be vertically spliced. The two box bodies can be spliced in a plane mode. According to the box body disclosed by the utility model, the 45-degree inclined surfaces are arranged on the splicing beams, so that the splicing beams do not interfere with each other when the two box bodies are spliced at 90 degrees, and a basis compatible with plane splicing and vertical splicing is provided. And secondly, the two splicing assemblies can be vertically spliced and flatly spliced, the first splicing assembly or the second splicing assembly can be selectively assembled according to the splicing requirements during application, excessive mounting positions do not need to be reserved, and the strength of the box body is not influenced.

Description

Technical Field

[0001] The utility model belongs to the technical field of LED display screens, and particularly relates to a box body of an LED display screen. Background Art

[0002] When an LED display screen is applied, multiple LED display screens are assembled into a large display surface. According to different display requirements, some only need to splice out a large display surface, some need to splice two large display surfaces connected vertically, and some need to splice out a cubic display surface. This requires that the LED display screens can be spliced flatly and can also be spliced at 90°. In the related prior art, the LED display screen cannot meet both right-angle splicing and flat splicing at the same time, and usually two specifications of LED display screens need to be produced. Summary of the Utility Model

[0003] The utility model aims to at least solve the above technical problems existing in the prior art. For this purpose, the utility model provides a box body applied to an LED display screen, which can be spliced vertically and can also be spliced flatly.

[0004] The box body according to the embodiment of the utility model, applied to an LED display screen, comprises:

[0005] A box body main body, on two opposite sides of the box body main body, splicing beams are arranged, 45° inclined planes are arranged on the outer side walls of the splicing beams, along the direction from front to back, the distance between the inclined planes and the vertical center line of the box body main body decreases, and on two opposite splicing beams, mounting platforms are recessed in the inclined planes;

[0006] A first splicing component, the first splicing component comprises a first splicing seat and a first splicing head, the first splicing seat and the first splicing head are structures that are mutually matched and clamped, the first splicing seat and the first splicing head can be detachably mounted on two opposite mounting platforms on two sides, and when mounted on the mounting platforms, the connecting direction of the first splicing seat is perpendicular to the connecting direction of the first splicing head, for vertical splicing;

[0007] A second splicing component, the second splicing component comprises a second splicing seat and a second splicing head, the second splicing seat and the second splicing head are structures that are mutually matched and clamped, the second splicing seat and the second splicing head can be detachably mounted on two opposite mounting platforms on two sides, and when mounted on the mounting platforms, the connecting direction of the second splicing seat is opposite to the connecting direction of the second splicing head, for flat splicing;

[0008] Among them, when the first splicing component is installed on the box body, the two box bodies can be vertically spliced, and when the second splicing component is installed on the box body, the two box bodies can be horizontally spliced.

[0009] The box body according to the embodiment of the present invention has at least the following beneficial effects: In the box body of the present invention, first, a 45° inclined surface is provided on the splicing beam of the box body itself, so that there is no interference between the splicing beams when the two box bodies are spliced at 90°, providing a basis for compatible horizontal splicing and vertical splicing. Secondly, the box body of the present invention is provided with two splicing components. In the first splicing component, the splicing directions of the first splicing seat and the first splicing head are perpendicular to each other, so that the two box bodies can be vertically spliced through the first splicing component. In the second splicing component, the splicing directions of the second splicing seat and the second splicing head are opposite, so that the two box bodies can be horizontally spliced through the second splicing component. Moreover, both the first splicing component and the second splicing component are installed on the box body through the installation platform. During application, the first splicing component or the second splicing component can be selected and installed according to the splicing requirements, without the need to reserve too many installation positions, and the strength of the box body will not be affected. Therefore, the box body in the present invention can be vertically spliced and horizontally spliced, solving the splicing problem in the prior art and being beneficial to reducing the equipment investment cost.

[0010] According to some embodiments of the present invention, a support portion is provided on the installation platform, and the first splicing seat, the first splicing head, the second splicing seat and the second splicing head are all provided with installation portions matching the support portion and are detachably connected to the support portion through the installation portions.

[0011] According to some embodiments of the present invention, the installation platform has two opposite platform side walls, the support portion protrudes from the two platform side walls, and the support portion is located at one end of the platform side wall close to the center of the box body.

[0012] According to some embodiments of the present invention, the support portion is provided with an installation hole and a positioning hole, the installation portion is connected to the installation hole by a screw, and the installation portion is provided with a positioning protrusion matching the positioning hole.

[0013] According to some embodiments of the present utility model, the first splicing seat is provided with a first splicing hole and a first unlocking member. The first splicing hole is disposed on the rear end face of the first splicing seat along the direction from the rear to the front. The first unlocking member penetrates into the first splicing hole and can withdraw from the first splicing hole under the action of an external force. The first splicing head is provided with a first connecting shaft, the first connecting shaft can be adjusted to move in the left-right or up-down direction, the shaft diameter of the first connecting shaft is adapted to the first splicing hole and can be inserted into the first splicing hole, and a first card slot for the first unlocking member to snap into is provided on the first connecting shaft.

[0014] According to some embodiments of the present utility model, the first splicing head is provided with a first locking assembly, and the first locking assembly can lock the first connecting shaft to limit the movement of the first connecting shaft.

[0015] According to some embodiments of the present utility model, the sizes of the first splicing seat and the first splicing head satisfy that when the first splicing seat is docked with the first splicing head, the two inclined surfaces on the two opposite box body bodies are attached to each other.

[0016] According to some embodiments of the present utility model, the second splicing seat is provided with a third splicing surface, and the second splicing head is provided with a fourth splicing surface. The third splicing surface and the fourth splicing surface are distributed along the front-rear direction of the box body body and are parallel to the length direction of the splicing beam where they are located. The third splicing surface and the fourth splicing surface are flush with the outer edge of the splicing beam where they are located.

[0017] According to some embodiments of the present utility model, the second splicing seat is provided with a second splicing hole and a second unlocking member. The second splicing hole is disposed on the third splicing surface along the left-right or up-down direction. The second unlocking member penetrates into the second splicing hole and can withdraw from the second splicing hole under the action of an external force. The second splicing head is provided with a second connecting shaft, the second connecting shaft can be adjusted to move in the left-right or up-down direction, the shaft diameter of the second connecting shaft is adapted to the second splicing hole and can be inserted into the second splicing hole, and a second card slot for the second unlocking member to snap into is provided on the second connecting shaft.

[0018] According to some embodiments of the present utility model, the splicing beam includes a first splicing beam that is opposite up and down and a second splicing beam that is opposite left and right. One of the first splicing assembly and the second splicing assembly is disposed on the first splicing beam, and the other is disposed on the second splicing beam.

[0019] Additional aspects and advantages of the present utility model will be given in part in the following description, and some additional aspects and advantages will become apparent from the following description, or will be understood through the practice of the present utility model. Brief Description of the Drawings

[0020] The following further describes the present utility model in conjunction with the drawings and embodiments, where:

[0021] Figure 1 It is a schematic structural view of the box body main body in the present utility model;

[0022] Figure 2 It is a schematic structural view of an installation platform;

[0023] Figure 3 It is a schematic structural view of the first splicing seat and the first splicing head installed on the installation platform;

[0024] Figure 4 It is a schematic structural view of the first splicing assembly installed on the box body main body;

[0025] Figure 5 It is a cross-sectional structural view of the first splicing assembly installed on the box body main body;

[0026] Figure 6 and Figure 7 It is a schematic structural view of the first splicing seat from different perspectives;

[0027] Figure 8 It is a schematic structural view of the first splicing head;

[0028] Figure 9 It is a schematic structural view of the second splicing head;

[0029] Figure 10 It is a schematic structural view of the second splicing seat. Detailed Embodiment

[0030] The following details the embodiments of the present utility model. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0031] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0032] In the description of the present utility model, the meaning of "several" is more than one, the meaning of "multiple" is more than two, and understandings such as "greater than", "less than", "exceeding", etc. do not include the base number, and understandings such as "above", "below", "within", etc. include the base number. If there is a description of "first", "second", etc., it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0033] In the description of the present utility model, unless otherwise clearly defined, terms such as "set", "installed", "connected", etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present utility model in combination with the specific content of the technical solution.

[0034] In the description of the present utility model, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0035] When an LED display screen is applied, multiple LED display screens are assembled into a large display surface. According to different display requirements, some only need to splice out a large display surface, some need to splice two vertically connected large display surfaces, and some need to splice out a cubic display surface. This requires that the LED display screens can be both horizontally spliced and spliced at 90°. In the related prior art, the LED display screen cannot meet both right-angle splicing and horizontal splicing at the same time, and usually two specifications of LED display screens need to be produced.

[0036] The present utility model provides a box body, which is applied to an LED display screen and can be both vertically spliced and horizontally spliced.

[0037] Refer to Figures 1 to 10, a box body of an embodiment of the present utility model is applied to an LED display screen, and includes a box body main body 100, a first splicing component, and a second splicing component. Among them, splicing beams 101 are provided on two opposite sides of the box body main body 100, such as the upper and lower sides, or the left and right sides. A 45° inclined surface 1011 is provided on the outer side wall of the splicing beam 101 (referring to the side of the splicing beam 101 away from the center of the box body main body 100). The specific inclination direction of the inclined surface 1011 is: along the direction from front to back, the distance between the inclined surface 1011 and the vertical center line of the box body main body 100 decreases, that is, the inclined surface 1011 is inclined inward along the backward direction. In this way, 90° splicing can be achieved by abutting the two box bodies through the inclined surface 1011. Installation platforms 102 are recessed in the two opposite splicing beams 101 within the inclined surface 1011, and the positions of the installation platforms 102 are symmetrical to each other.

[0038] The first splicing component includes a first splicing base 200 and a first splicing head 300. The first splicing base 200 and the first splicing head 300 are structures that are matched and snap-connected to each other. The first splicing base 200 and the first splicing head 300 can be detachably installed on two opposite installation platforms 102 on both sides, and when installed on the installation platform 102, the connection direction of the first splicing base 200 is perpendicular to the connection direction of the first splicing head 300 for vertical splicing.

[0039] The second splicing component includes a second splicing base 500 and a second splicing head 400. The second splicing base 500 and the second splicing head 400 are structures that are matched and snap-connected to each other. The second splicing base 500 and the second splicing head 400 can be detachably installed on two opposite installation platforms 102 on both sides, and when installed on the installation platform 102, the connection direction of the second splicing base 500 is opposite to the connection direction of the second splicing head 400 for planar splicing.

[0040] Therefore, when the first splicing component is installed on the box body main body 100, vertical splicing can be performed between the two box body main bodies 100. When the second splicing component is installed on the box body main body 100, planar splicing can be performed between the two box body main bodies 100.

[0041] In summary, for the box body in the present utility model, first, a 45° inclined plane 1011 is provided on the splicing beam 101 of the box body itself, so that there is no interference between the splicing beams 101 when two box bodies are spliced at 90°, providing a basis for compatible planar splicing and vertical splicing. Secondly, the box body in the present utility model is provided with two splicing components. In the first splicing component, the splicing directions of the first splicing seat 200 and the first splicing head 300 are perpendicular to each other, so that two box bodies can be vertically spliced through the first splicing component. In the second splicing component, the splicing directions of the second splicing seat 500 and the second splicing head 400 are opposite, so that two box bodies can be planar spliced through the second splicing component. Furthermore, both the first splicing component and the second splicing component are installed on the box body main body 100 through the installation platform 102. During application, the first splicing component or the second splicing component can be selected according to the splicing requirements, without reserving too many installation positions and without affecting the strength of the box body. Therefore, the box body in the present utility model can be vertically spliced and can also be planar spliced, solving the splicing problem in the prior art and being beneficial to reducing the equipment input cost.

[0042] Specifically, referring to Figure 2 , in some embodiments of the present utility model, a supporting portion 1021 is provided on the installation platform 102. The first splicing seat 200, the first splicing head 300, the second splicing seat 500, and the second splicing head 400 are all provided with installation portions 103 matching the supporting portion 1021 and are detachably connected to the supporting portion 1021 through the installation portions 103.

[0043] Referring to Figure 2 , in some embodiments of the present utility model, since the installation platform 102 is formed by the concave of the inclined plane 1011, the installation platform 102 has two opposite platform side walls 1022. In this embodiment, the supporting portion 1021 protrudes on the two platform side walls 1022, and the supporting portion 1021 is located at one end of the platform side wall 1022 close to the center of the box body main body 100, so as to reserve enough space in the outer area of the supporting portion 1021 for the installation and matching of the splicing components. Correspondingly, installation portions 103 are provided on both sides of the first splicing seat 200, the first splicing head 300, the second splicing seat 500, and the second splicing head 400 to connect the supporting portions 1021 on both sides.

[0044] In some embodiments of the present utility model, the support portion 1021 is provided with mounting holes and positioning holes. The mounting portion 103 is connected to the mounting holes by screws, and the mounting portion 103 is provided with positioning protrusions that match the positioning holes. The positioning protrusions can be positioning posts or positioning ball beads. With the structural arrangement of this embodiment, rapid disassembly and assembly of the mounting portion 103 and the support portion 1021 can be achieved, which can not only ensure the mounting stability of the mounting portion 103, and further ensure the mounting stability of the first splicing base 200, the first splicing head 300, the second splicing base 500, and the second splicing head 400, but also quickly disassemble the first splicing base 200, the first splicing head 300, the second splicing base 500, and the second splicing head 400 for replacement.

[0045] Referring Figure 6 and Figure 7 , in some embodiments of the present utility model, the first splicing base 200 is provided with a first splicing hole 202 and a first unlocking member 203. The first splicing hole 202 is arranged on the rear end face of the first splicing base 200 along the direction from the rear to the front. The first unlocking member 203 penetrates into the first splicing hole 202 and can withdraw from the first splicing hole 202 under the action of an external force; the first splicing head 300 is provided with a first connecting shaft 302. The first connecting shaft 302 can be moved and adjusted in the left-right or up-down direction. The shaft diameter of the first connecting shaft 302 is adapted to the first splicing hole 202 and can be inserted into the first splicing hole 202, and a first card slot 303 for the first unlocking member 203 to snap into is arranged on the first connecting shaft 302. With the structural arrangement of this embodiment, when the first splicing base 200 and the first splicing head 300 are installed on two opposite mounting platforms 102, since the first connecting shaft 302 of the first splicing head 300 moves in the left-right or up-down direction, and the first splicing hole 202 is opened on the rear end face of the first splicing base 200, when the first connecting shaft 302 on one box body is inserted into the first splicing hole 202 on the other box body between the two box bodies, the front end faces of the two box bodies are perpendicular to each other, achieving a 90° splicing.

[0046] Specifically, the first unlocking member 203 is slidably mounted on the first splicing base 200. At the same time, a first spring is arranged between the first unlocking member 203 and the first splicing base 200. Through the pushing action of the first spring, one end of the first unlocking member 203 is located in the first splicing hole 202, and the other end extends to the side of the first splicing base 200 close to the center of the box body main body 100. The end of the first connecting shaft 302 is provided with a taper, so as to automatically push open the first unlocking member 203 when inserting to complete the clamping, and when disassembling, only need to push the end of the first unlocking member 203 outwards, and the other end of it can withdraw from the first splicing hole 202.

[0047] In some embodiments of the present utility model, the first splicing joint 300 is provided with a first locking assembly 304, and the first locking assembly 304 can lock the first connecting shaft 302 to limit the movement of the first connecting shaft 302. After the first connecting shaft 302 is inserted into the first splicing hole 202 and the first locking member is snapped into the first card slot 303, the first connecting shaft 302 is locked by the first locking assembly 304, preventing the first connecting shaft 302 from exiting uncontrollably, which can improve the reliability of splicing. The first locking assembly 304 can be structured according to relevant prior art, as long as it can lock the first connecting shaft 302 and limit the movement of the first connecting shaft 302.

[0048] In some embodiments of the present utility model, the sizes of the first splicing base 200 and the first splicing joint 300 are such that when the first splicing base 200 and the first splicing joint 300 are docked, the two opposite inclined surfaces 1011 on the two box bodies 100 are in contact.

[0049] Refer to Figures 3 to 8 , in some embodiments, the first splicing surface 201 is provided at the rear end of the first splicing base 200. The first splicing surface 201 is perpendicular to the front-rear direction and parallel to the length direction of the splicing beam 101 where the first splicing base 200 is located. The first splicing hole 202 is opened on the first splicing surface 201. When installed on the installation platform 102, the first splicing surface 201 is flush with the upper end of the platform side wall 1022, and the outer side is flush with the outer side of the installation platform 102 or retracted inward relative to the outer side of the installation platform 102. The outer side (i.e., the side away from the center of the box body 100) of the first splicing joint 300 is provided with a second splicing surface 301. The second splicing surface 301 is perpendicular to the front-rear direction and parallel to the length direction of the splicing beam 101 where it is located. The second splicing surface 301 is retracted inward relative to the outer side of the installation platform 102, so as to form a space capable of accommodating the protruding part of the first splicing base 200 relative to the inclined surface 1011 between it and the installation platform 102. When the first splicing base 200 and the first splicing joint 300 are docked, the first splicing surface 201 and the second splicing surface 301 are in contact, and at the same time, the inclined surfaces 1011 of the two boxes are in contact, with a large contact area, which is beneficial to improving the stability of splicing and can achieve seamless splicing between the two boxes.

[0050] Refer to Figure 9 and Figure 10, in some embodiments of the present utility model, the second splicing seat 500 is provided with a third splicing surface 501, and the second splicing head 400 is provided with a fourth splicing surface 401. The third splicing surface 501 and the fourth splicing surface 401 are distributed along the front-back direction of the box body 100 and are parallel to the length direction of the splicing beam 101 where they are located. The third splicing surface 501 and the fourth splicing surface 401 are flush with the outer edge of the splicing beam 101 where they are located. In this way, when the second splicing seat 500 and the second splicing head 400 are docked, planar splicing can be achieved through the abutting and fitting of the third splicing surface 501 and the fourth splicing surface 401, and a supporting force can be provided.

[0051] Refer to Figure 9 and Figure 10 , in some embodiments of the present utility model, the second splicing seat 500 is provided with a second splicing hole 502 and a second unlocking member. The second splicing hole 502 is vertically provided on the third splicing surface 501. The second unlocking member penetrates into the second splicing hole 502 and can withdraw from the second splicing hole 502 under the action of an external force. The second splicing head 400 is provided with a second connecting shaft 402. The movement adjustment of the second connecting shaft 402 is parallel to the hole direction of the second splicing hole 502. The shaft diameter of the second connecting shaft 402 is adapted to the second splicing hole 502 and can be inserted into the second splicing hole 502. And the second connecting shaft 402 is provided with a second card slot 403 for the second unlocking member to be inserted into. Further, the second splicing head 400 is also provided with a second locking assembly 503 for locking the movement of the second connecting shaft 402. The corresponding structural settings can all refer to the first splicing assembly for setting and will not be elaborated here.

[0052] In some embodiments of the present utility model, the splicing beam 101 includes a first splicing beam that is relatively upper and lower and a second splicing beam that is relatively left and right. One of the first splicing assembly and the second splicing assembly is provided on the first splicing beam, and the other is provided on the second splicing beam. In this way, the boxes can be spliced flatly between left and right, vertically between up and down, or vertically between left and right and flatly between up and down.

[0053] Refer to Figure 1 , two installation platforms 102 are provided on each splicing beam 101 to enable two splicing assemblies to be used for connection and fixation between adjacent two boxes.

[0054] The embodiments of the present utility model have been described in detail above with reference to the drawings. However, the present utility model is not limited to the above embodiments. Various changes can be made without departing from the gist of the present utility model within the knowledge scope of those of ordinary skill in the art. In addition, the embodiments of the present utility model and the features in the embodiments can be combined with each other without conflict.

Claims

1. A box body, characterized in that, Applied to an LED display screen, including: A cabinet body, on two opposite sides of the cabinet body, splicing beams are provided. On the outer side wall of the splicing beam, a 45° inclined surface is provided. Along the direction from front to back, the distance between the inclined surface and the vertical center line of the cabinet body decreases. On two opposite splicing beams, installation platforms are recessed in the inclined surface; A first splicing component, the first splicing component includes a first splicing seat and a first splicing head. The first splicing seat and the first splicing head are structures that are matched and clamped with each other. The first splicing seat and the first splicing head can be detachably installed on two opposite installation platforms on both sides. And when installed on the installation platform, the connection direction of the first splicing seat is perpendicular to the connection direction of the first splicing head, for vertical splicing; A second splicing component, the second splicing component includes a second splicing seat and a second splicing head. The second splicing seat and the second splicing head are structures that are matched and clamped with each other. The second splicing seat and the second splicing head can be detachably installed on two opposite installation platforms on both sides. And when installed on the installation platform, the connection direction of the second splicing seat is opposite to the connection direction of the second splicing head, for planar splicing; Wherein, when the first splicing component is installed on the cabinet body, vertical splicing can be carried out between two cabinet bodies. When the second splicing component is installed on the cabinet body, planar splicing can be carried out between two cabinet bodies.

2. The box according to claim 1, characterized in that, Support parts are provided on the installation platform. The first splicing seat, the first splicing head, the second splicing seat and the second splicing head are all provided with installation parts matching the support parts, and are detachably connected to the support parts through the installation parts.

3. The box according to claim 2, characterized in that, The installation platform has two opposite platform side walls. The support parts protrude from the two platform side walls, and the support parts are located at one end of the platform side walls close to the center of the cabinet body.

4. The box according to claim 3, characterized in that, The support parts are provided with installation holes and positioning holes. The installation parts are connected to the installation holes by screws, and the installation parts are provided with positioning protrusions matching the positioning holes.

5. The box according to claim 1, characterized in that, The first splicing seat is provided with a first splicing hole and a first unlocking part. The first splicing hole is arranged on the rear end face of the first splicing seat along the direction from back to front. The first unlocking part penetrates into the first splicing hole and can withdraw from the first splicing hole under the action of an external force; the first splicing head is provided with a first connecting shaft. The first connecting shaft can move and adjust along the left-right or up-down direction. The shaft diameter of the first connecting shaft is adapted to the first splicing hole and can be inserted into the first splicing hole. And a first clamping groove for the first unlocking part to be clamped into is arranged on the first connecting shaft.

6. The box according to claim 5, characterized in that, The first splicing head is provided with a first locking component, and the first locking component can lock the first connecting shaft to limit the movement of the first connecting shaft.

7. The box according to claim 1, characterized in that, The sizes of the first splicing seat and the first splicing head meet the requirement that when the first splicing seat is docked with the first splicing head, the two inclined surfaces on two opposite cabinet bodies are attached.

8. The box according to claim 1, characterized in that, The second splicing base is provided with a third splicing surface, the second splicing head is provided with a fourth splicing surface, the third splicing surface and the fourth splicing surface are distributed along the front-back direction of the box body, and are parallel to the length direction of the splicing beam where they are located, and the third splicing surface and the fourth splicing surface are flush with the outer edge of the splicing beam where they are located.

9. The housing according to claim 8, characterized in that, The second splicing base is provided with a second splicing hole and a second unlocking member. The second splicing hole is arranged on the third splicing surface along the left-right or up-down direction. The second unlocking member penetrates into the second splicing hole and can withdraw from the second splicing hole under the action of an external force. The second splicing head is provided with a second connecting shaft. The second connecting shaft can be adjusted to move along the left-right or up-down direction. The shaft diameter of the second connecting shaft is adapted to the second splicing hole and can be inserted into the second splicing hole. And the second connecting shaft is provided with a second card slot for the second unlocking member to be inserted into.

10. The box according to claim 1, characterized in that, The splicing beam includes a first splicing beam and a second splicing beam that are opposite to each other up and down and a second splicing beam that are opposite to each other left and right. One of the first splicing component and the second splicing component is arranged on the first splicing beam, and the other is arranged on the second splicing beam.

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