Stacking system

Abstract

The utility model discloses a stacking system which comprises a first container and a second container, the second container is configured to be capable of being stacked to the first container in the Z-axis direction, and the first container and the second container are connected with each other through a connecting assembly. The connecting assembly comprises a first connecting piece arranged on the first container and a second connecting piece arranged on the second container, the first connecting piece and the second connecting piece are connected in a matched mode and can limit the second container to move relative to the first container in the Z-axis direction, and the first container and the second container are connected into a whole. In the X-axis direction, the second container has a degree of freedom relative to the first container, and the second container is connected with the first container; therefore, the second container is easier and more convenient to stack and install on the first container, and the use feeling of a user is improved.

Description

Technical Field

[0001] This application relates to the field of toolbox or tool box technology, and more particularly to a stackable system. Background Technology

[0002] Toolboxes or tool cases are typically stacked to maximize vertical space for easy storage and transport. However, the lack of interlocking mechanisms makes these structures unstable, prone to shaking or collisions that could cause top toolboxes or tool cases to fall, posing a safety hazard. To address this, interconnecting and locking mechanisms have been designed into the toolboxes or tool cases. However, current interconnecting structures have very limited space, making it difficult for users to connect two toolboxes or tool cases together, resulting in a poor user experience and hindering stacking installation. Furthermore, current stacking systems can only be transported by horizontal movement, not by flipping them over, making them inflexible and inconvenient. Utility Model Content

[0003] This utility model relates to a stacking system that can easily complete stacking connections and facilitate transfer and movement.

[0004] The stacking system includes a first container and a second container, the second container being configured to be stackable onto the first container along the Z-axis, and the first container and the second container being interconnected by a connecting component;

[0005] The connecting component includes a first connector disposed on the first container and a second connector disposed on the second container. The first connector and the second connector cooperate to connect and restrict the movement of the second container relative to the first container in the Z-axis direction. In the X-axis direction, when the second container is connected to the first container, the second container has free movement relative to the first container. The Z-axis direction is the vertical direction, and the X-axis direction is the horizontal direction perpendicular to the Z-axis direction.

[0006] Furthermore, the second container has a first limit position and a second limit position relative to the first container; the first connector includes a first female connector and a second female connector, and the second connector includes a first male connector and a second male connector. In the first limit position, the first male connector extends into and abuts against the first female connector, and the second male connector extends into the second female connector, but there is a gap between the second male connector and the second female connector; in the second limit position, the second male connector extends into and abuts against the second female connector, and the first male connector extends into the first female connector, but there is a gap between the first male connector and the first female connector.

[0007] Furthermore, both the first container and the second container include a top wall, a bottom wall, and a side wall, wherein the top wall and the bottom wall are perpendicular to the Z-axis direction, and the side wall is parallel to the Z-axis direction; the first female connector and the second female connector are disposed on the top wall of the first container, and the openings of the first female connector and the second female connector are opposite to each other; the first male connector and the second male connector are disposed on the bottom wall of the second container and extend in opposite directions along the X-axis direction.

[0008] Furthermore, the first connector further includes a third female connector, and the second connector further includes a third male connector. The third female connector is disposed between the first female connector and the second female connector. The opening orientation of the third female connector is consistent with the opening orientation of the first female connector or the second female connector. The third male connector is mated with the third female connector.

[0009] Furthermore, it also includes an interlocking component configured to lock the second container and the first container together, the interlocking component including a first locking element disposed in the first container and a second locking element disposed in the second container.

[0010] Furthermore, the first locking member and the second locking member are disposed on the sidewalls of the first container and the second container.

[0011] Furthermore, at least one of the first container and the second container also includes a handle.

[0012] Furthermore, the handle is provided on the side wall of the first container and / or the second container.

[0013] Furthermore, the stacking system includes a first position state and a second position state. In the first position state, the stacking system is placed horizontally, and the top and bottom walls of the first and second containers are perpendicular to the Z-axis direction.

[0014] In the second position state, the stacking system is lifted by the handle, and the top and bottom walls of the first and second containers are parallel to the Z-axis direction. Under the action of gravity, the second container can automatically move relative to the first container, so that the second container is in the first extreme position or the second extreme position relative to the first container.

[0015] Furthermore, the first container and the second container each include an upper shell and a lower shell, which are hinged to each other. The first container and the second container also include a self-locking assembly configured to lock the upper shell and the lower shell together. The handle is disposed on the side wall of the lower shell. The first locking member is disposed on the lower shell of the first container, and the second locking member is disposed on the lower shell of the second container.

[0016] Beneficial effects: The connecting components of this stacking system can restrict the movement of the second container relative to the first container in the Z-axis direction, connecting the first and second containers into a whole. However, in the X-axis direction, while maintaining the connection between the first and second containers, the second container has a degree of freedom relative to the first container, making it easier and more convenient to stack and install the second container on the first container, thus improving the user experience.

[0017] In addition, the first and / or second containers in the stacking system are provided with handles on their sides, allowing the stacking system to be moved as a whole via the handles. Furthermore, the connecting components can be automatically locked in this state. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the stacking system in an embodiment of this utility model.

[0019] Figure 2 yes Figure 1 The sectional view in the image.

[0020] Figure 3 This is a front view of the stacking system in an embodiment of this utility model.

[0021] Figure 4 yes Figure 3 A sectional view.

[0022] Figure 5 This is an exploded view of the first container in an embodiment of this utility model.

[0023] Figure 6a This is a schematic diagram of the upper shell in an embodiment of this utility model.

[0024] Figure 6b This is a schematic diagram of the upper shell from another perspective in an embodiment of this utility model.

[0025] Figure 7 This is a schematic diagram of the lower shell in an embodiment of this utility model.

[0026] Figure 8 This is a schematic diagram illustrating the process of stacking the second container onto the first container in an embodiment of this utility model.

[0027] Figure 9 yes Figure 8 A sectional view.

[0028] Figure 10 This is a schematic diagram of the stacking system in the second position state in an embodiment of this utility model.

[0029] Figure 11 This is a schematic diagram of another stacking system in an embodiment of this utility model.

[0030] Figure 12 This is a schematic diagram of another stacking system in an embodiment of this utility model.

[0031] Reference numerals: Stacking system-100; First container-1; Storage space-10; Upper shell-11; Top wall-111; Upper front wall-112; Upper rear wall-113; Upper left wall-114; Upper right wall-115; First recess-131; Second recess-132; First connector-14; First female connector-141; Second female connector-142; Third female connector-143; Top wall-14a; Long side wall-14b; Short side wall-14c; Bottom wall-14d; Slot-133;

[0032] Lower housing - 12; bottom wall - 121; lower front wall - 122; lower rear wall - 123; lower left side wall - 124; lower right side wall - 125; first protrusion - 151; second protrusion - 152; second connector - 16; first male connector - 161; second male connector - 162; third male connector - 163; first locking element - 171; second locking element - 172; self-locking assembly - 18; handle - 19;

[0033] Second container-2; Upper shell-21; First connector-24; First female connector-241; Second female connector-242; Third female connector-243; Slot-233; Lower shell-22; Second connector-26; First male connector-261; Second male connector-262; Third male connector-263; First locking element-271; Second locking element-272; Handle-29. Detailed Implementation

[0034] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application.

[0035] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to limit the application. Unless otherwise defined, the technical or scientific terms used in this application should be understood in their ordinary sense by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "a" or "one" and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. "A plurality" or "several" indicates two or more. Unless otherwise indicated, the terms "front," "rear," "lower," and / or "upper" and similar terms are for ease of description only and are not limited to a location or spatial orientation. The terms "comprising" or "including" and similar terms mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. The terms "connected" or "linked" and similar terms are not limited to physical or mechanical connections and can include electrical connections, whether direct or indirect. The singular forms “a,” “the,” and “the” used in this application specification and appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0036] This utility model discloses a stacking system 100, such as Figure 1 As shown, the stacking system 100 includes a first container 1 and a second container 2. The second container 2 is configured to be stackable to the first container 1 along the Z-axis direction. The first container 1 and the second container 2 are interconnected by a connecting component.

[0037] In this embodiment, as Figure 1 The coordinate axes are defined as follows: the X-axis is the horizontal direction, the Y-axis is the horizontal direction, the X-axis and Y-axis correspond to the short and long sides of the first container 1 and the second container 2, respectively, and the Z-axis is the vertical direction, corresponding to the height of the first container 1 and the second container 2. The X-axis, Y-axis and Z-axis are perpendicular to each other.

[0038] like Figure 2 As shown, the connecting assembly includes a first connector 14 disposed in the first container 1 and a second connector 26 disposed in the second container 2. The first connector 14 and the second connector 26 cooperate to connect and restrict the movement of the second container 2 relative to the first container 1 in the Z-axis direction. However, in the X-axis direction, the second container 2 has a degree of freedom l relative to the first container 1, but the second container 2 and the first container 1 remain connected.

[0039] Specifically, in combination Figure 4 As shown, the first connector 14 includes a first female connector 141 and a second female connector 142, and the second connector 26 includes a first male connector 161 and a second male connector 162. The first female connector 141 and the first male connector 161 are assembled, and the second female connector 142 and the second male connector 162 are assembled.

[0040] The second container 2 has a first limit position and a second limit position relative to the first container 1. In the first limit position, the first male connector 161 extends into and abuts against the first female connector 141, and the second male connector 162 extends into the second female connector 142, but there is a gap between the second male connector 162 and the second female connector 142; in the second limit position, they are engaged... Figure 3 and 4 As shown, the second male connector 162 extends into and abuts against the second female connector 142, and the first male connector 161 extends into the first female connector 141, but there is a gap between the first male connector 161 and the first female connector 141.

[0041] In this way, the connecting components have room to move, and the second container 2 can be moved slightly relative to the first container 1, making it easy to stack the second container 2 onto the first container 1. This makes the operation effortless and convenient, and provides a good user experience.

[0042] In this embodiment, the first container 1 and the second container 2 have the same structure, but may differ in length, width or height.

[0043] like Figures 5-7 As shown, taking the first container 1 as an example: the first container 1 includes an upper shell 11 and a lower shell 12 that are hinged together. Combined with... Figure 6a and 6b As shown, the upper shell 11 is integrally formed, including a top wall 111, an upper front end wall 112, an upper rear end wall 113, and upper left and right side walls 114 and 115 connected together. The upper front end wall 112 and the upper rear end wall 113 have short sides extending along the X-axis, and the upper left and right side walls 114 and 115 have long sides extending along the Y-axis. Figure 7 As shown, the lower housing 12 is also integrally formed, including a bottom wall 121, a lower front wall 122, a lower rear wall 123, and lower left and right side walls 124 and 125 that are integrally connected. The lower front wall 122 and the lower rear wall 123 have short sides extending along the X-axis, and the lower left and right side walls 124 and 125 have long sides extending along the Y-axis. The upper left side wall 114 of the upper housing 11 and the lower left side wall 124 of the lower housing 12 are hinged together. The upper housing 11 and the lower housing 12 close to form a storage space 10.

[0044] like Figure 6a and 6bAs shown, the outer surface of the top wall 111 of the upper housing 11 is provided with two recessed portions, and a first connector 14 is provided on the side of the recessed portion. The first connector 14 includes a first female connector 141 and a third female connector 143 disposed in the first recessed portion 131, and a second female connector 142 disposed in the second recessed portion 132. The first female connector 141 is located near the left long side, and the second female connector 142 is located near the right long side. The opening orientation of the second female connector 142 and the third female connector 143 is the same, and the opening orientation is opposite to that of the first female connector 141.

[0045] Specifically, there are two of each of the first female connector 141, the second female connector 142, and the third female connector 143 in the Y-axis direction. Each female connector includes a top wall 14a, a long side wall 14b, two short side walls 14c, and a bottom wall 14d. The bottom wall 14d is the top wall 111 of the upper housing 11. The long side wall 14b extends along the Y-axis direction, and the two short side walls 14c extend along the X-axis direction.

[0046] Preferably, the upper housing 11 is further provided with two fourth female connectors (not shown in the figure) in the second groove portion 132 along the Y-axis direction, and the opening orientation of the fourth female connectors is the same as the opening orientation of the first female connector 141.

[0047] A slot 133 is provided on the outer surface of the top wall 111 of the upper housing 11 at the center near the right long side.

[0048] like Figure 7 As shown, the bottom of the lower housing 12 is provided with two protrusions, which correspond to and engage with the grooves of the upper housing 11. A second connector 16 extends from each protrusion along the X-axis. The second connector 16 includes a first male connector 161 and a third male connector 163 extending from the first protrusion 151, and a second male connector 162 extending from the second protrusion 152. Both the second male connector 162 and the third male connector 163 extend along the X-axis towards the right long side, while the first male connector 161 extends along the X-axis towards the left long side.

[0049] Specifically, there are two of each of the first male connector 161, the second male connector 162, and the third male connector 163 in the Y-axis direction, which correspond one-to-one with each of the female connectors.

[0050] Preferably, the second protrusion 152 may also be provided with a fourth male connector (not shown in the figure), which extends from the second protrusion 152 along the X-axis direction toward the left long side.

[0051] In this embodiment, the width of the second connector 16 in the X-axis direction is smaller than the width of the first connector 14 in the X-axis direction, and the length of the second connector 16 in the Y-axis direction is equal to the length of the first connector 14 in the Y-axis direction.

[0052] Combination Figure 1 and Figure 5 , Figure 7 As shown, the lower housing 12 has a first locking member 171 on the lower right side wall 125 where the long right side is located. The first locking member 171 is configured as a buckle, which is hinged to the lower right side wall 125 and located at the upper center of the lower right side wall 125. When the upper housing 11 and the lower housing 12 are closed, the buckle is engaged in the slot 133 of the upper housing 11, and the buckle does not protrude from the outer surface of the upper housing 11.

[0053] The lower housing 12 is provided with a second locking member 172 on the lower right side wall 125 where the long right side is located. The second locking member 172 is configured as a hook extending from the lower right side wall 125 and the hook is located at the lower center of the lower right side wall 125.

[0054] like Figure 2 As shown, the first container 1 also includes a self-locking assembly 18, which locks the upper shell 11 and the lower shell 12 together after they are closed. The self-locking assembly 18 is a conventional snap-fit ​​structure, and therefore will not be described in detail here. The number of self-locking assemblies 18 can be set according to the length of the first container 1 to ensure that the upper shell 11 and the lower shell 12 are locked. In this embodiment, three sets of self-locking assemblies 18 are provided on the upper and lower right side walls 115 and 125 where the right long side is located. Furthermore, in this embodiment, the first locking member 171 is hinged to the middle self-locking assembly. In other embodiments, two or more sets of self-locking assemblies 18 can be provided.

[0055] The lower housing 12 is also provided with a handle 19 on the lower right side wall 125 where the long right side is located. The handle 19 is hinged to the lower right side wall 125. Therefore, the user can lift the handle 19 to flip the first container 1 and move the first container 1 portablely.

[0056] Similarly, such as Figure 2 and 4As shown, the second container 2 includes an upper shell 21 and a lower shell 22 that are hinged together. The upper shell 21 is provided with a recess, a first connector 24, and a slot 233. The first connector 24 includes a first female connector 241, a second female connector 242, and a third female connector 243. The lower shell 22 is provided with a protrusion, a second connector 26, a buckle 271, a hook 272, and a handle 29. The second connector 26 includes a first male connector 261, a second male connector 262, and a third male connector 263. The second container 2 is also provided with three sets of self-locking components for locking after the upper shell 21 and the lower shell 22 are closed. The buckle 271 of the second container 2 engages with the slot 233 to achieve mutual locking of the upper and lower shells 21 and 22.

[0057] During stacking, the second container 2 is placed on top of the first container 1 along the Z-axis. The first connector 14 of the upper shell 11 of the first container 1 and the second connector 26 of the lower shell 22 of the second container 2 cooperate to form a connecting assembly. The first locking member 171 of the first container 1 and the second locking member 272 of the second container 2 cooperate to form an interlocking assembly.

[0058] When installing the second container 2 onto the first container 1, combined with Figure 8 and 9 As shown, the second container 2 can be tilted first, and the first male connector 261 of the second container 2 can be inserted into the first female connector 141 of the first container 1. Then, as the second container 2 is laid flat, the second male connector 262 and the third male connector 263 can be inserted into the second female connector 142 and the third female connector 143 of the first container 1, respectively. Simultaneously, the protruding portions of the second container 2 are respectively accommodated in the recessed portions of the first container 1. Each second connector 26 of the second container 2 is interconnected with the corresponding first connector 14 of the first container 1. Alternatively, the second male connector 262 and the third male connector 263 of the second container 2 can be first engaged with the second female connector 242 and the third female connector 243 of the first container 1, respectively, and then the second container 2 can be laid flat so that its first male connector 261 engages with the first female connector 141 of the first container 1.

[0059] Combination Figure 4 As shown, in the Z-axis direction, the top wall 14a of each female connector can restrict the corresponding mating male connectors, thus restricting the movement of the second container 2 relative to the first container 1 in the Z-axis direction. Since the length of the female connector is equal to the length of the male connector in the Y-axis direction, each male connector abuts against the short sidewall 14c of the mating female connector, thus restricting the movement of the second container 2 relative to the first container 1 in the Y-axis direction.

[0060] Because the width of the female connector is greater than that of the male connector in the X-axis direction, the second container 2 has a certain degree of freedom of movement l relative to the first container 1 in the X-axis direction. That is, the second container 2 can move slightly relative to the first container 1 in the X-axis direction. However, it is worth noting that the second container 2 still maintains its connection with the first container 1. Leaving space in the X-axis direction makes it easier to stack the second container 2.

[0061] After all the male connectors of the second container 2 are inserted into the corresponding female connectors of the first container 1, the retaining ring of the first container 1 is then fastened onto the hook 272 of the second container 2 to achieve mutual locking of the first container 1 and the second container 2, making the first container 1 and the second container 2 a single unit for easy overall movement. It should be noted that a small movement of the second container 2 relative to the first container 1 in the X-axis direction is insufficient to affect the locking state of the retaining ring 171 of the first container 1 and the hook 272 of the second container 2.

[0062] The stacking system 100 includes a first position state and a second position state. In the first position state, the stacking system 100 is placed horizontally, as shown below. Figure 3 As shown, the top walls of the upper shells 11 and 21 of the first container 1 and the second container 2, and the bottom walls of the lower shells 12 and 22 of the first container 1 and the second container 2 are perpendicular to the Z-axis direction.

[0063] In the second position, the stacking system 100 is lifted by handles 19 and 29, i.e., the top walls of the upper shells 11 and 21 of the first container 1 and the second container 2, and the bottom walls of the lower shells 12 and 22 of the first container 1 and the second container 2 are parallel to the Z-axis direction. Therefore, when the stacking system 100 is locked in place, it can be moved as a whole by means of handles 19 and 29.

[0064] When the user lifts the handle, the stacking system rotates 90°. Because the width of the first connector 14 is greater than the width of the second connector 26, the second container 2 can move relative to the first container 1 under the action of gravity, so that at least one pair of female connectors and male connectors abut against each other, thereby achieving automatic locking of the first container 1 and the second container 2.

[0065] Specifically, when the user lifts the handle 19 of the first container 1 located below, the second container 2 droops under the action of gravity, bringing it to its first extreme position. That is, the first male connector 261 of the second container 2 abuts against the long side wall 14b of the first female connector 141 of the first container 1, thereby achieving automatic locking. Furthermore, although there are gaps between the second male connector 262 of the second container 2 and the long side wall 14b of the second female connector 142 of the first container 1, and between the third male connector 263 of the second container 2 and the long side wall 14b of the third female connector 143 of the first container 1, the second male connector 262 and the third male connector 263 are pressed against the top walls 14a of the second female connector 142 and the third female connector 143 respectively, thus maintaining the connection.

[0066] In another case, combination Figure 10 As shown, when the user lifts the handle 29 of the second container 2 located at the top, the first container 1 droops under the action of gravity, causing the second container 2 to be in the second extreme position. That is, the second male connector 261 of the second container 2 abuts against the long side wall 14b of the second female connector 142 of the first container 1, and the third male connector 263 of the second container 2 abuts against the long side wall 14b of the third female connector 143 of the first container 1, thereby achieving automatic locking. In addition, although there is a gap between the first male connector 261 of the second container 2 and the long side wall 14b of the first female connector 141 of the first container 1, the first male connector 261 is pressed against the top wall 14a of the first female connector 141, thereby maintaining the connection.

[0067] Therefore, the stacking system 100 can also be portable by means of a handle, and in this state, the connecting components of the stacking system 100 can also automatically lock the first container 1 and the second container 2.

[0068] like Figure 11 As shown, similarly, a third container 3, a fourth container 4, and so on can be stacked sequentially on top of the second container 2 using the same connecting and locking structure. Furthermore, as... Figure 12 As shown, other containers may be different in size from the first container 1.

[0069] The above description is merely a preferred embodiment of this application and is not intended to limit this application in any way. Although this application has disclosed the preferred embodiment as above, it is not intended to limit this application. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the technical solution of this application. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the content of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A stacking system, characterized in that, It includes a first container and a second container, the second container being configured to be stackable onto the first container along the Z-axis direction, and the first container and the second container being interconnected by a connecting component; The connecting component includes a first connector disposed on the first container and a second connector disposed on the second container. The first connector and the second connector cooperate to connect and restrict the movement of the second container relative to the first container in the Z-axis direction. In the X-axis direction, when the second container is connected to the first container, the second container has a degree of freedom of movement relative to the first container. The Z-axis direction is the vertical direction, and the X-axis direction is the horizontal direction perpendicular to the Z-axis direction.

2. The stacking system according to claim 1, characterized in that, The second container has a first limit position and a second limit position relative to the first container; the first connector includes a first female connector and a second female connector, and the second connector includes a first male connector and a second male connector. In the first limit position, the first male connector extends into and abuts against the first female connector, and the second male connector extends into the second female connector, but there is a gap between the second male connector and the second female connector; in the second limit position, the second male connector extends into and abuts against the second female connector, and the first male connector extends into the first female connector, but there is a gap between the first male connector and the first female connector.

3. The stacking system according to claim 2, characterized in that, Both the first container and the second container include a top wall, a bottom wall, and a side wall, wherein the top wall and the bottom wall are perpendicular to the Z-axis direction, and the side wall is parallel to the Z-axis direction; the first female connector and the second female connector are disposed on the top wall of the first container, and the openings of the first female connector and the second female connector are opposite to each other; the first male connector and the second male connector are disposed on the bottom wall of the second container and extend in opposite directions along the X-axis direction.

4. The stacking system according to claim 3, characterized in that, The first connector further includes a third female connector, and the second connector further includes a third male connector. The third female connector is disposed between the first female connector and the second female connector. The opening orientation of the third female connector is consistent with the opening orientation of the first female connector or the second female connector. The third male connector is mated with the third female connector.

5. The stacking system according to claim 3, characterized in that, It also includes an interlocking component configured to lock the second container and the first container together, the interlocking component including a first locking element disposed in the first container and a second locking element disposed in the second container.

6. The stacking system according to claim 5, characterized in that, The first locking member and the second locking member are disposed on the side walls of the first container and the second container.

7. The stacking system according to claim 6, characterized in that, At least one of the first container and the second container also includes a handle.

8. The stacking system according to claim 7, characterized in that, The handle is provided on the side wall of the first container and / or the second container.

9. The stacking system according to claim 8, characterized in that, The stacking system includes a first position state and a second position state. In the first position state, the stacking system is placed horizontally, and the top and bottom walls of the first and second containers are perpendicular to the Z-axis direction. In the second position state, the stacking system is lifted by the handle, and the top and bottom walls of the first and second containers are parallel to the Z-axis direction. Under the action of gravity, the second container can automatically move relative to the first container, so that the second container is in the first extreme position or the second extreme position relative to the first container.

10. The stacking system according to claim 9, characterized in that, The first container and the first The two containers respectively It includes an upper shell and a lower shell, which are hinged together. The first container and the second container further include a self-locking assembly configured to lock the upper housing and the lower housing together; the handle is disposed on the side wall of the lower housing; the first locking member is disposed on the lower housing of the first container, and the second locking member is disposed on the lower housing of the second container.

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