Patent Publication Number: US-2023136626-A1

Title: Stacked toolbox system

Description:
PRIORITY CLAIM 
     This application claims priority to Chinese Patent Application No. 202122677703.6 filed on Nov. 3, 2021; Chinese Patent Application No. 202210212862.5 filed on Mar. 4, 2022; Chinese Patent Application No. 202210212005.5 filed on Mar. 4, 2022; and Chinese Patent Application No. 202210588703.5 filed on May 27, 2022. The contents of all of which are hereby incorporated by reference herein. 
     TECHNICAL FIELD 
     This application relates to the field of article storage, and in particular to a main storage box, a secondary storage box, and a storage box set. 
     BACKGROUND INFORMATION 
     In order to facilitate the user in the case of carrying multiple storage boxes (such as toolboxes) to facilitate the overall movement and use, each storage box is usually stacked together, and each storage box is usually locked together by interlocking, so as to facilitate the user to move and use. A number of ways are known for interlocking storage boxes. Now on the market, there are roughly the following three forms of locking: the first way uses a single plastic latch that can be turned to clasp the lower bottom of the box protrusion to achieve the purpose of interlocking; the second way is the conventional use of the front of the two-segment latch moved to the side to lock between the upper and lower boxes; and the third way uses a combination of steel wire and plastic to lock boxes together at the side. However, the above locking methods can only be interlocked for the same length and width of the shape of the box, and cannot be interlocked for different length and width of the size of the shape of the box, with many professional users needing to carry more and more diverse types of tools, there is an urgent need for interlocking between different sizes of the box. 
     SUMMARY 
     Based on this, it is necessary to provide a main storage box that can be interlocked with other storage boxes of different sizes, a secondary storage box for interlocking with the main storage box, and a storage box set having storage boxes of different sizes and interlocked so that existing storage boxes of different sizes cannot be interlocked with each other. 
     According to an aspect of the present application, there is provided a main storage box comprising: a first box having a first end face; two spaced apart second locking mechanisms, provided symmetrically along the first direction on both edges of said first end face; and at least one first locking mechanism, said at least one first locking mechanism being provided on said first end face and disposed between two spaced apart said second locking mechanisms said at least one first locking mechanism is for being set opposite to any one of said second locking mechanisms to form a first locking gap in a first direction, between two spaced apart said second locking mechanisms being able to form a second locking gap in a first direction. 
     In one embodiment, each said first locking mechanism comprises a first snap hook, said first snap hook being movably mounted to said first box to enable one said first locking mechanism to form said first locking gap with one said second locking mechanism. 
     In one embodiment, said first end surface is provided with a first recess, one end of said first snap hook being movably mounted in said first recess to enable the other end of said first snap hook to protrude or be housed in said first recess. One said first locking mechanism is capable of forming said first locking gap with one said second locking mechanism when the other end of said first snap hook protrudes from said first recess. In one embodiment, each said second locking mechanism comprises a second recess opened in said main storage box, a second connecting shaft fixed in said second recess and a second snap hook rotatably connected to said second connecting shaft, said second locking mechanism being lockable by flipping of said second snap hook. 
     In one of the embodiments, each said second locking mechanism comprises a second recess opened in the main storage box, a rail fixed to the bottom wall of said second recess, and a second snap hook capable of moving within said rail, said second locking mechanism being lockable by retraction of said second snap hook. 
     In one of the embodiments, said first box has a second end surface relative to said first end surface, said second end surface being provided with two second locking positions for cooperating with said second locking mechanism at the edges of said second end surface, the two said second locking positions being spaced along said first direction. 
     According to another aspect of the present application, there is provided a secondary storage box for cooperating with said main storage box, said secondary storage box comprising a second box, said second box having a third end face, at least one second locking mechanism provided on said third end face and a third locking mechanism provided opposite to said second locking mechanism, said second locking mechanism and said third locking mechanism forming a third locking gap between said second locking mechanism and said third locking mechanism. 
     In one embodiment, said secondary storage box further comprises a second locking mechanism, said fourth end face opposite said third end face, said fourth end face provided with a second locking bit opposite said second locking mechanism and a first locking bit opposite said third locking mechanism. 
     According to a further aspect of the present application, there is provided a storage box set, said storage box set comprising at least one said main storage box and at least one said secondary storage box; one said main storage box being capable of being stacked and locked with at least one said secondary storage box on top of each other. 
     When one said main storage box is stacked and locked in place with one said secondary storage box, said first locking mechanism of said main storage box snaps into said first locking position of said secondary storage box, and said second locking mechanism of said main storage box snaps into said second locking position of said secondary storage box so that said secondary storage box is confined in said first locking gap. 
     In one embodiment, said main storage box has a plurality of recessed portions opened on said first end, said main storage box has a plurality of tabs opened on said second end; said secondary storage box has a plurality of said recessed portions opened on said third end, said secondary storage box has a plurality of said tabs opened on said fourth end, each said tab being capable of being confined in one of said recessed portions to prevent stacking of one another said main storage box and said secondary storage box from moving relative to each other. 
     Said main storage box, sub-storage box and storage box set, by providing two spaced and symmetrically provided second locking mechanisms at the edge of one end face of the main storage box, and at least one first locking mechanism between the two second locking mechanisms, so that one first locking mechanism and one second locking mechanism can form a first locking gap, or so that two spaced and symmetrically provided second locking mechanisms can form A second locking gap, not only can the first locking mechanism and the second locking mechanism cooperate to make the secondary storage box confined in the first locking gap of the main storage box, so that the main storage box and the secondary storage box of different sizes can be interlocked when they are stacked together, but also can make use of the cooperation of multiple second locking mechanisms to make one main storage box confined in the second locking gap of another main storage box, so that the main storage box of the same size can be interlocked with the secondary storage box. This allows interlocking of main storage boxes of the same size when they are stacked together. This greatly expands the convenience and versatility of the main storage box, secondary storage box and storage box group, greatly enhancing the user&#39;s experience. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       These and other features and advantages of the present invention will be better understood by reading the following detailed description, taken together with the drawings wherein: 
         FIG.  1    is a three-dimensional schematic diagram of a storage box set of an embodiment provided by the invention. 
         FIG.  2    an exploded schematic diagram of the storage box set of an embodiment provided by the invention. 
         FIG.  3    a three-dimensional schematic diagram of an angle of the first storage box provided by the invention. 
         FIG.  4    a three-dimensional schematic diagram of another angle of the first storage box provided by the invention. 
         FIG.  5    a three-dimensional schematic diagram of an angle of the second storage box provided by the invention. 
         FIG.  6    a three-dimensional schematic diagram of another angle of the second storage box provided by the invention. 
         FIG.  7    a three-dimensional schematic diagram of another angle of the second storage box provided by the invention. 
         FIG.  8    a cross-sectional view along the second direction of the first storage box and the second storage box provided by the invention when stacked. 
         FIG.  9    a three-dimensional schematic diagram of the first locking mechanism provided by the invention. 
         FIG.  10    an exploded schematic diagram of the first locking mechanism provided by the invention. 
         FIG.  11    a three-dimensional schematic diagram of the second locking mechanism of the first embodiment provided by the invention. 
         FIG.  12    an exploded schematic diagram of the second locking mechanism of the first embodiment provided by the invention. 
         FIG.  13    a three-dimensional schematic diagram of the second locking mechanism of the second embodiment provided by the invention. 
         FIG.  14    is an exploded schematic diagram of the second locking mechanism of the second embodiment provided by the invention. 
         FIG.  15    is a cross-sectional view along the third direction when the first storage box and the second storage box are interlocked when the second locking mechanism is the first embodiment. 
         FIG.  16    shows a cross-sectional view along the third direction when the second locking mechanism is the first storage box and the second storage box interlocked for the second embodiment. 
         FIG.  17    is a schematic diagram of the three-dimensional structure of the storage boxes in a second embodiment of a second locking mechanism in the locked state. 
         FIG.  18    is a cross-sectional view of  FIG.  17   . 
         FIG.  19    is a three-dimensional view of the storage boxes of  FIG.  17    in the unlocked state. 
         FIG.  20    is a three-dimensional view of the storage boxes of  FIG.  17    separated from each other. 
         FIG.  21    is a three-dimensional view of the top storage box of  FIG.  17    viewed from the bottom. 
         FIG.  22    is a three-dimensional view of the bottom storage box of  FIG.  17    viewed from the top. 
         FIG.  23    shows the three-dimensional view of the bottom storage box of  FIG.  17    viewed from the top with the locking mechanism in an exploded state. 
         FIG.  24    is a schematic diagram of a third embodiment of a locking mechanism for storage boxes. 
         FIG.  25    is a schematic diagram of the third embodiment of the locking mechanism for storage boxes in a partially exploded view. 
         FIG.  26    is a bottom perspective view of the storage box of  FIG.  24   . 
         FIG.  27    is a schematic diagram of the structure of a first connection. 
         FIG.  28    is a schematic diagram of the exploded structure of  FIG.  27    after further decomposition. 
         FIG.  29    is a schematic diagram of the exploded structure of  FIG.  27    after even further decomposition. 
         FIG.  30    is a schematic diagram of a three-dimensional structure of a storage box according to a fourth embodiment illustrating a linkage buckle for the second locking mechanism of the half-box of  FIGS.  5 - 7   . 
         FIG.  31    is a schematic diagram of the bottom, front side of the storage box of  FIG.  30   . 
         FIG.  32    is a schematic diagram of the bottom, back side of the storage box of  FIG.  30   . 
         FIG.  33    is a schematic diagram of the locking buckle. 
         FIG.  34    is a schematic diagram of the locking transmission mechanism. 
         FIG.  35    is a schematic diagram of stacked storage boxes with the locking buckle. 
         FIG.  36    is a rear-side view of the stacked storage boxes of  FIG.  35   . 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Referring to  FIGS.  1 - 16   , in order to make the above purpose, features and advantages of the invention more obvious and easy to understand, the following detailed description of the specific implementation of this invention is made in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the invention. However, the invention can be implemented in many other ways than those described herein, and a person skilled in the art can make similar improvements without violating the connotation of the invention, so the invention is not limited by the specific embodiments disclosed below. 
     It should be noted that when an element is said to be “fixed” to another element, it may be directly on the other element or there may also be a centered element. When an element is considered to be “attached” to another element, it may be directly attached to the other element or there may be both centered elements. 
     Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of skill in the art belonging to the invention. The terms used herein in the specification of the invention are for the purpose of describing specific embodiments only and are not intended to limit the invention. The term “and/or” as used herein includes any and all combinations of one or more of the relevant listed items. 
     An embodiment of the invention provides a main storage box  100 , a secondary storage box  300  making up a storage box set  10 . The structure of the storage box set  10  and the main storage box  100  and the secondary storage box  300  in the storage box set  10  in this application is described below as an example of a tool box, which can include at least two main storage boxes  100  of the same size and dimension, or can include main storage boxes  100  and secondary storage boxes  300  of different sizes and dimensions. The storage box set  10  can include at least two main storage boxes  100  of the same size, but also can include different sizes of the main storage box  100  and secondary storage box  300 , each storage box stacked together, adjacent to the upper and lower two layers of the storage box can achieve interlock for the convenience of users to carry and use. 
     The present embodiment is used as an example only and does not limit the technical scope of the present application. It is understood that in other embodiments, the structure of the main storage box  100  and the secondary storage box  300  can also be used for other storage boxes other than toolboxes, and will not be limited here. 
     In one embodiment, the storage box set  10 , as shown in  FIGS.  1  and  2   , includes three main storage boxes  100  and two secondary storage boxes  300  stacked and locked together, with the main storage boxes  100  and secondary storage boxes  300  having different dimensions. Two adjacent main storage boxes  100  are stacked and locked together in the third direction, two secondary storage boxes  300  are placed side by side in the first direction and locked above the two adjacent main storage boxes  100 , and another main storage box  100  is stacked and locked above the two secondary storage boxes  300  placed side by side in the first direction. The two adjacent main storage boxes  100  are aligned and stacked with each other, and the long side of each secondary storage box  300  is aligned with the short side of one main storage box  100 , so that the storage box set  10  provided by the invention can have storage boxes of different sizes aligned and stacked with each other and locked together. The arrangement of the storage boxes  100  and secondary storage boxes  300  can take any form with one or the other on top of the other. 
     In some embodiments, as shown in  FIGS.  3  and  4   , the main storage box  100  has a rectangular cube structure and includes a first box body  110 . The first box body  110  of the main storage box  100  has a first end face  111  and a second end face  112  that are relatively parallel along the third direction. The first end  111  forms a part of the lid into the interior of the first box body  111 . A first locking mechanism  120  and a second locking mechanism  130  can be provided on the first end face  111 . Two first locking mechanisms  120  can be provided at the middle of the first end face  111 , and two second locking mechanisms  130  can be provided at the edges of the two short sides of the first end face  111 , each of which is symmetrical and spaced along the first direction with the central axis of the first box  110  as the axis of symmetry. 
     In this way, one first locking mechanism  120  and one second locking mechanism  130  spaced relatively therebetween can form a first locking gap in the first direction, and the first locking gap can be used to lock the secondary storage box  300 , and one second locking mechanism  130  can form a second locking gap with another second locking mechanism  130  in the first direction, and the second locking gap can be used to lock the main storage box  100 . 
     In some embodiments, two spaced-apart second locking bits  140  are provided correspondingly on two opposing short edge edges of the second end face  112  of the main storage box  100 , each second locking bit  140  being provided opposite a second locking mechanism  130  in a third direction. In a preferred embodiment, the second locking bits  140  are provided at the second end face  112  of the main storage box  100 . In a preferred embodiment, as shown in  FIGS.  3  and  5   , the second locking bits  140  are mounts having a holding cavity with an opening at one end of the holding cavity away from the first box body  110 . 
     With the storage box set  10  placed in the orientation shown in  FIG.  1   , the long side of the main storage box  100  is oriented in the same direction as the first direction and the short side of the main storage box  100  is oriented in the same direction as the second direction. The X direction in the figure is the first direction, the Y direction is the second direction, the Z direction is the third direction, and the first direction, the second direction and the third direction are perpendicular to each other. 
     When one main storage box  100  and another main storage box  100  are stacked on top of each other, the first end face  111  of the main storage box  100  located below fits into the second end face  112  of the main storage box  100  located above, and each second locking mechanism  130  snaps into a second locking bit  140 , so that one of the main storage boxes  100  is confined to the other main storage box  100  in the second locking position to achieve interlocking between the two main storage boxes  100 . 
     In some embodiments, the main storage box  100  is further provided with a plurality of tabs at the second end face  112 , the tabs of the main storage box  100  including four first tabs  150  provided at the four corner positions of the second end face  112 , a plurality of depressions at the first end face  111  of the main storage box  100 , the depressions including a first depression  113  and a second depression  114 , the first depression  113  having four, set at the four top corners of the first end face  111  at positions corresponding to the four first tabs  150 . The two second depressions  114  are provided symmetrically along the short side of the second end face  112  in the middle of the second end face  112  near the long side. When the two main storage boxes 100  are stacked up and down in the third direction, each of the first tabs  150  is confined in one of the first depressions  113  to further limit the relative movement of the two adjacent main storage boxes  100  in the first direction or the second direction when stacked on top of each other. 
     In some embodiments, as shown in  FIGS.  5 ,  6  and  7   , the secondary storage box  300  includes a second box  310  having a third end face  311  and a fourth end face  312  relatively parallel to the third end face  311 , and the dimensions of the length and width of the secondary storage box  300  are smaller than those of the main storage box  100 . The second locking mechanism  320  and the third locking mechanism  330  are provided on the edge of one long side of the third end face  311 , and a third locking gap is formed between the second locking mechanism  320  and the third locking mechanism  330 , and the third locking gap can be used to lock the other secondary storage box  300 . A first locking bit  340  and a second locking bit  350  are provided on each of the two long edges of the fourth end face  312 , with one first locking bit  340  and one second locking bit  350  provided opposite each other. The first locking bit  340  may be locked with the third locking mechanism  330  to achieve stacking interlocking between the two secondary storage boxes  300 . The first locking bit  340  may also be locked with the first locking mechanism  120  of the main storage box  100  to achieve stacking interlocking between the secondary storage box  300  and the main storage box  100 . The second locking bit  350  may be locked with the second locking mechanism  320  of the secondary storage box  300 , thereby also enabling stacking interlocking between two secondary storage boxes  300 ; the second locking bit  350  may also be locked with the second locking mechanism  130  of the main storage box  100 , thereby also enabling stacking interlocking between the secondary storage box  300  and the main storage box  100 . With the storage box set  10  placed in the orientation shown in  FIG.  1   , the long side of the secondary storage box  300  is oriented in the same direction as the second orientation. 
     In some embodiments, as shown in  FIG.  6   ,  FIG.  9    and  FIG.  15   , the first locking bit  340  of the secondary storage box  300  is opened at one long edge of the fourth end face  312  of the secondary storage box  300 , with the first locking bit  340  preferably being a rib position located at one long edge of the fourth end face  312  of the secondary storage box  300 . In a preferred embodiment, as shown in  FIG.  5   , the second locking bit  350  of the secondary storage box  300  is also a mount having a holding cavity with an opening at one end of the holding cavity away from the second box  310 . 
     When a secondary storage box  300  is stacked above a main storage box  100 , a first end face  111  of the main storage box  100  at the bottom fits over a fourth end face  312  of the secondary storage box  300  at the top, and a first locking mechanism  120  of the main storage box  100  snaps into a first locking bit  340  of the secondary storage box  300 , and a second locking mechanism  130  of the main storage box  100  snaps into a first locking bit  340  of the secondary storage box  300 , as shown in conjunction with  FIGS.  1  and  2   . A second locking mechanism  130  of the main storage box  100  snaps into a second locking bit  350  of a secondary storage box  300  so that a secondary storage box  300  is confined to a first locking bit  340  of the main storage box  100  to achieve interlocking between a main storage box  100  and a secondary storage box  300 . 
     When two secondary storage boxes  300  are stacked on top of one main storage box  100 , two first locking mechanisms  120  of the main storage box  100  snap into the respective first locking bits  340  of the two secondary storage boxes  300 , and two second locking mechanisms  130  of the main storage box  100  snap into the respective second locking bits  350  of the two secondary storage boxes  300 , so that the two secondary storage boxes 300  are respectively confined in the two first locking gaps of one main storage box  100  to achieve interlocking of the two secondary storage boxes  300  located above and one main storage box  100  located below. 
     When one main storage box  100  is stacked above two secondary storage boxes  300 , the second end face  112  of the main storage box  100  located above fits into the third end face  311  of the secondary storage box  300  located below, and the respective second locking mechanism  320  of the two secondary storage boxes  300  can form a fourth locking gap along the first direction, and the second locking mechanism  320  of the two secondary storage boxes  300  snap into the two second locking bits  140  of the main storage box  100  above, respectively, so that one main storage box  100  located above the two secondary storage boxes  300  is confined in the fourth locking gap to achieve interlocking of one main storage box located above with the two secondary storage boxes  300  located below. 
     In some embodiments, as shown in  FIGS.  7  and  8   , the secondary storage box  300  is also provided with a plurality of tabs at the fourth end face  312 , and the tabs of the secondary storage box  300  include four third tabs  360  and two fourth tabs  370 , the four third tabs  360  being provided at the positions of the four corners of the fourth end face  312 , and the two fourth tabs  370  being provided symmetrically along the short side direction of the fourth end face  312  at the A plurality of depressions are provided in the third end face  311  of the sub-storage box  300 , and the depressions include a third depression  313 , and the third depression  313  has four, which are provided at the positions of the four corners of the third end face  311 , corresponding to the four third tabs 
     When a secondary storage box  300  is stacked on top of a main storage box  100 , the two third tabs  360  of the secondary storage box  300  are confined in the two first depressions  113  of the main storage box  100  to limit relative movement of the main storage box  100  and the secondary storage box  300  in the second direction or the third direction when stacked on top of each other. The two fourth tabs  370  of the secondary storage box  300  are confined in the two second depressions  114  of the main storage box  100 , wherein one side of each of the fourth tabs  370  fits against a side wall of one of the second depressions  114  to further limit relative movement of the main storage box  100  and the secondary storage box  300  in the third direction when stacked on top of each other. 
     When a main storage box  100  is stacked above two secondary storage boxes  300 , two of the four first tabs  150  of the main storage box  100  located above are limited to two third depressions  313  of one of the secondary storage boxes 300  located below, and the other two first tabs  150  are limited to two third depressions  313  of the other secondary storage box  300  located below to achieve the purpose of limiting the relative movement of the main storage box  100  and the secondary storage box  300  in the second or third direction when stacked with each other. The number and shape of the tabs and corresponding depressions of the main storage box  100  or the secondary storage box  300  are not limited, but can be round, square, polygonal, or elongated, as long as they can limit the relative displacement along the second direction and the third direction between the two stacked storage boxes. 
     It should be noted that the first locking mechanism  120  and the second locking mechanism  130  of the main storage box  100 , and the third locking mechanism  330  of the second locking mechanism  320  of the secondary storage box  300  can be unlimited in number, and some more numbers of the first locking mechanism  120  and the second locking mechanism  130  can be provided at the first end face  111  of the main storage box  100 , and thus more numbers of secondary storage boxes  300  can be realized and a main storage box  100  stacking and locking fit. 
     The stacking of the storage boxes is not limited to the stacking and locking of the secondary storage boxes 300  at the top of the main storage box  100 , but also to the stacking and locking of multiple secondary storage boxes 300  in the middle of the two main storage boxes 100 . 
     In some embodiments, shown in conjunction with  FIGS.  2 ,  3 , and  5   , the first locking mechanism  120  and the second locking mechanism  130  of the main storage box  100  are both retractable structures, and the first locking mechanism  120  of the main storage box  100  or the second locking mechanism  130  of the main storage box  100  are capable of moving relative to the first box body  110  to form a first locking gap on the first end face  111  of the first box body  110  in the first or a second locking gap in the first direction on the first end face  111  of the first box body  110  so that the secondary storage box  300  can be confined in the first locking gap of the main storage box  100  to achieve interlocking of the main storage box  100  and the secondary storage box  300 , or so that one main storage box  100  is confined in the second locking gap of the other main storage box  100  The interlocking between the two main storage boxes 100  is achieved. 
     Specifically, in a preferred embodiment, as shown in  FIGS.  9  and  10   , the first locking mechanism  120  includes a first connecting shaft  121  and a first snap hook  122  provided on the first box body  110 , and a first recess  115  is provided at the location where the first locking mechanism  120  is installed on the first end face  111  of the main storage box  100 . The first connection shaft  121  is preferably two, and one end of the two first connection shafts  121  is fixed to two opposite side walls of the first recess  115  in the second direction, and the two first connection shafts  121  are coaxially provided, and the end of the first snap hook  122  near the first recess  115  is provided with two mounting brackets for mounting the first connection shaft  121 . The first snap hook  122  is provided with two mounting holes  1221  near the first recess  115  for mounting the first connection shaft  121 , and each mounting hole  1221  is provided with one first connection shaft  121 , so that the first snap hook  122  can rotate around the central axis of the two first connection shafts  121  to realize the turning of the first locking mechanism  120 . 
     When the first locking mechanism  120  of the main storage box  100  snaps into the first locking bit  340  of the secondary storage box  300 , the first snap hook  122  rotates relative to the first connection shaft  121  so that the end of the first snap hook away from the first connection shaft  121  protrudes from the first recess  115 , while the bent portion of the first snap hook  122  hooks and holds against the outer wall of the ribbed position and cooperates with the second locking mechanism  130  to form the first locking gap thereby limiting the displacement of the main storage box  100  and the secondary storage box  300  in the first direction and the second direction. When it is not necessary to interlock the main storage box  100  and the secondary storage box  300 , the first snap hook  122  is rotated in the opposite direction with respect to the first connection shaft  121  so that the first snap hook  122  is completely accommodated in the first recess  115 , thereby keeping the first end face  111  of the main storage box  100  flat. 
     It is to be noted that the movable way of the first locking mechanism  120  relative to the second box  310  is not limited to a rotatable movable way, but may also be a retractable movable way. One end of the first snap hook  122  is movably mounted and housed in the first recess  115 , and when the locking between the storage boxes is required, the end of the first snap hook  122  mounted in the first recess  115  moves in the first direction toward the secondary storage box  300  so that the other end extends out of the first recess  115  and snaps into the first locking bit  340 , thereby forming a fit between the first snap hook  122  and the second locking mechanism  130  to form a first locking gap in the first direction on the first end face  111  of the main storage box  100 . When it is not necessary to interlock the main storage box  100  with the secondary storage box  300 , the first snap hook  122  is moved in the first direction toward the first box body  110  of the main storage box  100  so that the first snap hook  122  is fully accommodated in the first recess  115 . 
     As shown in  FIG.  11   ,  FIG.  12    and  FIG.  15   , the structure of the second locking mechanism  130  is described with the second locking mechanism  130  installed in the main storage box  100  as an example. A first embodiment of the second locking mechanism  130  is shown in the figure, and the second locking mechanism  130  includes a second attachment shaft  131  and a second snap hook  132 , and a second recess  116  is provided at the location where the second locking mechanism  130  is installed on the first end face  111  of the main storage box  100 , and the second recess  116  is provided at the edge of the first end face  111 , and the second recess  116  is open along the first direction and the second The second recess  116  is opened at the edge of the first end face  111  and the second recess  116  is open at one end in the first and second directions. The two ends of the second attachment shaft  131  are fixed to two opposite side walls of the second recess  116  along the third direction perpendicular to each other, and the second snap hook  132  is provided on the second attachment shaft  131  so that the second snap hook  132  can rotate around the central axis of the second attachment shaft  131 . 
     As shown in conjunction with  FIG.  1   ,  FIG.  15    and  FIG.  16   , when the second locking mechanism  130  of the main storage box  100  snaps into the second locking bit  140  of the secondary storage box  300 , or when the second locking mechanism  130  of one main storage box  100  snaps into the second locking position  140  of the other main storage box  100 , the second snap hook  132  is rotated relative to the second attachment shaft  131  to be fully accommodated in the second recess  116  so that the second locking mechanism  130  can cooperate with the first locking mechanism  120  so as to form a first locking gap in the first direction on the first end face  111  of the main storage box  100 , or so that the two second locking mechanisms  130  of the main storage box  100  can cooperate so as to form a second locking gap in the first direction on the first end face  111  of the main storage box  100 , when the side of the first box body  110  remains flat while the bent portion of the second snap hook  132  hooks the bottom cavity wall of the holding cavity of the mount in the second locking bit  140  and holds against the side cavity wall of the holding cavity of the mount to limit the mutual displacement between the main storage box  100  and the secondary storage box  300  or between the two main storage boxes  100  in the second direction and the third direction. 
     When it is not necessary to interlock the main storage box  100  and the secondary storage box  300  or when it is not necessary to lock the two main storage boxes 100  to each other, the second snap hook  132  is rotated in the opposite direction relative to the second attachment shaft  131  so that the end of the second snap hook  132  away from the second attachment shaft  131  extends out of the second recess  116 . 
     As shown in  FIG.  13   ,  FIG.  14    and  FIG.  16   , again taking the second locking mechanism  130  installed in the main storage box  100  as an example, a second embodiment of the second locking mechanism  130  is shown, and unlike the first embodiment of the second locking mechanism  130 , the second locking mechanism  130  is movable in a retractable movable manner relative to the first box body  110 . Specifically, the second locking mechanism  130  includes two rails  133 , the rails  133  are fixed to the bottom wall of the second recess  116  in the second direction, and the bottom of the second snap hook  132  is provided with two travel slots (not shown) matching the rails  133 , each travel slot is set on one rail  133  to enable the second snap hook  132  to move in the second direction. When the second locking mechanism  130  of the main storage box  100  snaps into the second locking bit  140  of the secondary storage box  300 , or when the second locking mechanism  130  of one main storage box  100  locks the second locking bit  140  of the other main storage box  100 , the second snap hook  132  moves along the rail  133  to fully accommodate the second recess  116 , so that the first box body  110  of the main storage box  100  is sides of the first box body  110  of the main storage box  100  are kept flat while the bent portion of the second snap hook  132  is held against the side and bottom cavity walls of the holding cavity of the mount to limit mutual displacement between the main storage box  100  and the secondary storage box  300  or between the two main storage boxes  100  in the second and third directions. When it is not necessary to interlock the main storage box  100  and the secondary storage box  300  or when it is not necessary to lock the two main storage boxes 100  to each other, the second snap hook  132  is moved in the opposite direction along the rail  133  so that one end of the second snap hook  132  extends out of the second recess  116 . 
     The second locking mechanism  320  of the secondary storage box  300  is identical in structure to the second locking mechanism  130  of the main storage box  100 . In this embodiment, the second locking mechanism  320  of the secondary storage box  300  is structured in a retractable implementation, with locking achieved by retraction of the snap hooks. The structure of the third locking mechanism  330  of the secondary storage box  300  is similar to the rotatable implementation of the second locking mechanism  320  in the main storage box  100 , which is also locked by means of a snap hook flip, and will not be repeated here. 
     The above storage box set  10 , by using the first locking mechanism  120 , the second locking mechanism  130 , the second locking bit  140 , the plurality of tabs and the plurality of corresponding depressions of the main storage box  100  and the second locking mechanism  320 , the third locking mechanism  330 , the first locking bit  340 , the second locking bit  350 , the plurality of tabs and the plurality of corresponding depressions of the secondary storage box  300  in conjunction, is able to simultaneously restrict the relative displacement between two stacked boxes in the first direction, the second direction and the third direction, so as to achieve the purpose of interlocking. 
     When the user needs to use a single storage box, the interlocked storage boxes in the storage box set  10  need to be unlocked. When unlocking two main boxes  100  of the same size, it is necessary to first unlock the second locking mechanism  130  of one main storage box  100 , pull out the second snap hook  132  relative to the first box body  110  of the main storage box  100  to protrude from the side of the first box body  110 , so that the second snap hook  132  is free from the second locking bit  140 , and then unlock the other second locking mechanism  130  so that the second snap hook  132  of the other second The second snap hook  132  of the other second locking mechanism  130  is released from its corresponding second locking bit  140 , thereby unlocking the two main storage boxes  100  of the same size. When unlocking two main storage boxes 100  and secondary storage boxes  300  of different sizes, taking the secondary storage boxes 300  stacked on top of the main storage boxes 100  as an example, the second locking mechanism  130  of one first storage box  100  is unlocked first, and then the first locking mechanism  120  is unlocked so that the first snap hook  122  of the first locking mechanism  120  is detached from the first locking bit  340  of the corresponding secondary storage box  300 , thus realizing the unlocking of two main storage boxes 100  of the same size. The first locking mechanism  120  is then unlocked so that the first snap hook  122  of the first locking mechanism  120  is disengaged from the first locking bit  340  of the corresponding secondary storage box  300 , thus realizing the unlocking of two different sizes of the main storage box  100  and the secondary storage box  300 . When unlocking two secondary storage boxes  300  of the same size, the second locking mechanism  320  of one secondary storage box  300  is first unlocked, so that the second locking mechanism  320  is released from its corresponding second locking bit  350 , and then the third locking mechanism  330  of one secondary storage box  300  is unlocked, so that the third locking mechanism  330  is released from its corresponding first locking bit  340 , thus realizing the unlocking of two secondary storage boxes 300  of the same size. The third locking mechanism  330  is released from its corresponding first locking bit  340 , so as to unlock two sub-storage boxes  300  of the same size. 
     Second Embodiment of Second Locking Mechanism 
     As shown in  FIGS.  17 - 23   , different from the above embodiment  1 : the storage box  20   a  in this embodiment (which can be the main storage box and the secondary storage box in the above embodiment 1) also includes a stop part  3   a ; the second locking mechanism  1   a  and the second locking position  2   a  can be automatically locked with each other, and the stop part  3  can make the second locking mechanism  1   a  and the second locking position  2   a  not automatically locked after unlocking, so that the second locking The second locking mechanism  1   a  and the second locking position  2   a  are kept in the unlocked state, so that the second locking mechanism  1   a  and the second locking position  2   a  can be unlocked and separated from each other, freeing the user&#39;s hands and facilitating the user&#39;s use. 
     Specifically, the second locking mechanism  1   a  in this embodiment is provided on the lid (i.e., the first end  201 a) of the storage box  20   a , which includes a mounting part  11   a , a locking part  12   a  movable relative to the mounting part  11   a  and a first elastic member  13   a  located between the mounting part  11   a  and the locking part  12   a , and the locking part  12   a  can be automatically kept in the locked state by the action of the first elastic member  13   a . In addition, in order to facilitate the positioning of the second locking mechanism  1  a when interlocking with the second locking bit  2   a , a positioning slot  41   a  may be provided in the box lid, and the positioning slot  41   a  may accommodate exactly the bottom of the box (i.e., the second end face  202   a ), and the second locking mechanism  1   a  may be provided at the edge of the positioning slot  41   a . In other embodiments, the positioning slot  41   a  can be positioned with the projections provided on the bottom of the box for the upper and lower storage boxes  20   a  when stacked. 
     Further, as shown in  FIG.  23   , in this embodiment, the mounting portion  11   a  is fixedly connected to the box lid. The mounting portion  11   a  includes a mounting slot  111   a  provided in the lid and a mounting body  112   a  located in the mounting slot  111   a , which can be bolted in the mounting slot  111   a . In other embodiments, the mounting body  112   a  may also be integrally formed with the mounting slot  111 , or may be fixedly connected by means such as snap-on. 
     Further, as shown in  FIG.  23   , in this embodiment, the locking portion  12   a  may be housed within the mounting body  112   a , which may be movable relative to the mounting body  112   a , The locking portion  12   a  is a sliding latch that moves horizontally relative to the mounting portion  11   a , thereby allowing the locking portion  12   a  to move horizontally within the mounting slot  111   a . In other embodiments, the locking portion  12   a  may also be a flip latch that flips to move relative to the mounting portion  11   a , or a rotary latch that rotates to move relative to the mounting portion  11   a . The locking portion  12   a  includes a locking body  121   a  that can be accommodated in the mounting body  112   a  and a locking buckle  122   a  located on the side of the locking body  121   a  near the center of the storage box  20   a ; when the locking buckle  122   a  extends out of the mounting portion  11  a (i.e., the locking buckle  122   a  extends into the positioning slot  41   a ), the second locking mechanism  1   a  and the second locking bit  2   a  can be interlocked, and when the locking buckle  122   a  does not The second locking mechanism  1   a  and the second locking position  2   a  can be interlocked when the locking buckle  122   a  does not extend out of the mounting portion  11   a  (i.e., the locking buckle  122   a  does not extend into the positioning slot  41   a ). Also, to facilitate locking between the locking buckle  122   a  and the second locking bit  2   a , the locking buckle  122   a  is provided with a bevel  122   aa.    
     Further, as shown in  FIG.  23   , in this embodiment, the first elastic member  13   a  is located between the locking body  121   a  and the mounting body  112   a , so that the locking portion  12   a  is automatically kept in the locked state by the action of the first elastic member  13   a . At the same time, in order to improve the reliability of the movement of the locking part  12   a , the first elastic member  13   a  can be provided with two, respectively located at the two ends of the locking body  121   a . The first resilient member  13   a  is a compression spring, which causes the locking part  12   a  to move horizontally; in other embodiments, the first resilient member  13   a  may also be a torsion spring, which causes the locking part  12   a  to flip and move. 
     Further, as shown in  FIG.  21   , in this embodiment, the second locking position  2   a  is provided at the bottom of the box of the storage box  20   a , which includes the mating part  21   a  that can be interlocked with the locking part  12   a  and the recessed part  22   a  that can be interlocked with the stopping part  3 , and the locking part  12   a  of one storage box  20   a  can be automatically locked with the mating part  21   a  of another storage box  20   a  under the action of the first elastic member  13   a . The first elastic member  13   a  is automatically locked. In addition, in order to facilitate the interlocking of the mating part  21   a  and the locking buckle  122   a , a projection  42   a  (here the projection  42   a  is the bottom of the box) may be provided on the bottom of the box, and the projection  42   a  may fit just inside the positioning slot  41   a . When the second locking mechanism  1   a  is in a locked state with the second locking bit  2   a , the locking buckle  122   a  interferes with the mating part  21   a ; when the second locking mechanism  1   a  is in a holding unlocked state with the second locking bit  2   a , the locking buckle  122   a  does not interfere with the mating part  21   a , and the stopping part  3   a  snaps with the recessed part  22   a , In other embodiments, when the second locking mechanism  1   a  is in a holding unlocked state with the second locking position  2   a , the stop portion  3   a  can be directly held with the mating portion  21   a . In addition, the mating part  21   a  is a number of slots  211   a , and the number of slots  211   a  can be set corresponding to the number of locking buckles  122   a.    
     Further, as shown in  FIG.  22    and  FIG.  23   , in this embodiment, the stop portion  3   a  is provided on the locking portion  12   a , which can move horizontally with the locking portion  12   a , and when the locking portion  12   a  is in the unlocked state, the stop portion  3   a  can snap with the second locking bit  2   a  in the locking path of the locking portion  12   a , and the locking portion  12   a  cannot be automatically locked, so that the second locking mechanism  1   a  and the second locking bit  2   a  are in the remain unlocked. The stopping portion  3   a  includes a holding slot  31   a  opened on the locking portion  12   a , a card block  32   a  that can be accommodated in the slot  31   a  and a second elastic member  33   a  disposed between the holding slot  31   a  and the card block  32   a , and the card block  32   a  is retracted relative to the holding slot  31   a  under the action of the second elastic member  33   a . Specifically, as shown in  FIG.  19   , when the second locking mechanism  1   a  and the second locking bit  2   a  are in a holding unlocked state, the second elastic member  33   a  extends and the card block  32   a  extends into the holding slot  31   a ; as shown in  FIG.  17    and  FIG.  18   , when the second locking mechanism  1  a and the second locking bit  2   a  are in a locked state, the second elastic member  33   a  compresses and the card block  32   a  is squeezed and compressed by the second locking bit  2   a  in the holding slot  31   a.    
     Third Embodiment 
     As shown in  FIGS.  24 - 29   , different from the above embodiment 1: the storage box  20   b  in this embodiment (which can be the main storage box and the secondary storage box in the above embodiment 1) also includes a stop portion  3   b ; the second locking mechanism  1   b  and the second locking bit  2   b  can be automatically locked with each other, and the stop portion  3   b  can make the second locking mechanism  1   b  and the second locking bit  2   b  unable to be automatically locked after unlocking, so that the second The second locking mechanism  1   b  and the second locking position  2   b  are kept in the unlocked state, so that the second locking mechanism  1   b  and the second locking position  2   b  can be unlocked and separated from each other, freeing the user&#39;s hands and facilitating the user&#39;s use. 
     Specifically, in this embodiment, the second locking mechanism  1   b  is provided on the lid (i.e., the first end  201   b ) of the storage box  20   b , which includes a mounting part  11   b , a locking part  12   b  movable relative to the mounting part  11   b  and a first elastic member  13   b  located between the mounting part  11   b  and the locking part  12   b , and the locking part  12   b  can be automatically kept in the locked state under the action of the first elastic member  13   b . In addition, as shown in  FIGS.  18  and  19   , to facilitate positioning of the second locking mechanism  1   b  when interlocked with the second locking bit  2   b , a positioning slot  41   b  may be provided in the lid, which may be positioned with the projection  42   b  provided on the bottom of the box (i.e., the second end face  202   b ) for positioning of the upper and lower storage boxes  20   b  when stacked. In other embodiments, the positioning slot  41   b  may precisely accommodate the bottom of the box, and the second locking mechanism  1   b  may be provided at the edge of the positioning slot  41   b.    
     Further, as shown in  FIG.  25   , in this embodiment, the mounting portion  11   b  is fixedly connected to the box lid. The mounting section  11   b  includes a mounting slot  111   b  in the lid and a mounting body  112   b  located in the mounting slot  111   b , which can be bolted in the mounting slot  111   b . In other embodiments, the mounting body  112   b  may also be integrally formed with the mounting slot  111   b , or may be fixedly connected by means such as snap-on. 
     Further, as shown in  FIGS.  27  to  29   , in this embodiment, the locking portion  12 b may be housed within the mounting body  112   b , which may be movable relative to the mounting body  112   b . The locking portion  12   b  is a flip latch that flips and moves relative to the mounting portion  11   b , thereby allowing the locking portion  12   b  to flip and move within the mounting slot  111   b . In other embodiments, the locking portion  12   b  may also be a sliding latch that moves horizontally relative to the mounting portion  11   b , or a rotating latch that moves rotationally relative to the mounting portion  11   b . The locking part  12   b  includes a locking body  121   b  rotatable around a rotating shaft (not marked) at one end and a locking clasp  122   b  located at the other end of the locking body  121   b  near the center of the storage box  20   b ; when the locking clasp  122   b  is extended into the second locking position  2   b , the second locking mechanism  1   b  and the second locking position  2   b  can be interlocked, and when the locking clasp  122   b  is not extended into the second locking position  2   b , the second The second locking mechanism  1   b  and the second locking position  2   b  can be interlocked when the locking buckle  122   b  is not extended into the second locking position  2   b . Also, to facilitate locking between the locking buckle  122   b  and the second locking position  2   b , the locking buckle  122   b  is provided with a bevel  122   ab.    
     Further, as shown in  FIG.  28    and  FIG.  29   , in this embodiment, the first resilient member  13   b  is provided on the rotating shaft, and its two ends are respectively abutted to the locking body  121   b  and the mounting body  112   b , so that the locking part  12   b  is automatically kept in the locked state under the action of the first resilient member  13   b . Meanwhile, in order to improve the reliability of the movement of the locking part  12   b , the first elastic member  13   b  can be provided at both ends of the rotating shaft. The first resilient member  13   b  is a torsion spring, which causes the locking part  12   b  to move over; in other embodiments, the first resilient member  13   b  may also be a compression spring, which causes the locking part  12   b  to move horizontally. 
     Further, as shown in  FIGS.  24  to  26   , in this embodiment, the second locking bit  2   b  is provided at the bottom of the box of the storage box  20   b , which includes a mating part  21   b  that is interlockable with the locking part  12   b , and pressing down on the locking part  12   b  of one module can make it automatically lock with the mating part  21   b  of the other module under the action of the first elastic member  13   b . When the second locking mechanism  1   b  and the second locking bit  2   b  are in a locked state, the locking buckle  122   b  interferes with the mating part  21   b ; when the second locking mechanism  1   b  and the second locking bit  2   b  are in an unlocked state, the locking buckle  122   b  does not interfere with the mating part  21   b . The mating part  21   b  is a number of slots  211   b , and the number of slots  211   b  may be set corresponding to the number of locking buckles  122   b.    
     Further, as shown in  FIGS.  27  to  29   , in this embodiment, the stop portion  3   b  includes a block  31   b  and a protrusion  32   b  that can be interlocked with the block  31   b , and when the block  31   b  and the protrusion  32   b  are interlocked, the locking portion  12   b  cannot be automatically locked. Specifically, when the second locking mechanism  1   b  and the second locking bit  2   b  are in a holding unlocked state, the card block  31   b  and the convex rib  32   b  are stuck on the side of the convex rib  32   b  away from the center of the storage box  20   b ; when the second locking mechanism  1   b  and the second locking bit  2   b  are in a locked state, the card block  31   b  is located on the other side of the convex rib  32   b  near the center of the storage box. 
     Further, as shown in  FIG.  28    and  FIG.  29   , in this embodiment, the card  31   b  is set on the locking part  12   b  of the second locking mechanism  1   b  and can move with the locking part  12   b , and the convex rib  32   b  remains stationary compared with the card  31   b , and the locking part  12   b  can drive the card  31   b  over the convex rib  32   b . Specifically, the card  31   b  is set at both ends of the locking part  12   b , and the card  31   b  can With the locking part  12   b  overturned to move between the two sides of the convex ribs  32   b , so as to realize the second locking mechanism  1   b  and the second locking position  2   b  to switch between the locked state, the unlocked state and the keep unlocked state. 
     Further, as shown in  FIG.  29   , in this embodiment, the convex rib  32   b  is also provided on the second locking mechanism  1   b  and remains relatively stationary compared to the catch  31   b , which includes a first holding slot  321   b  opened on the convex rib body  325   b , a bump  322   b  that can be accommodated in the first holding slot  321   b  and a second resilient member located between the bump  322   b  and the first holding slot  321   b    323   b , the bump  322   b  being retractable relative to the first holding slot  321   b  under the action of the second resilient member  323   b , so that after the card block  31   b  crosses the bump  322   b  the card block  31   b  can again snap with the bump  322   b  against each other, thereby keeping the second locking mechanism  1   b  in an unlocked state with the second locking position  2   b . The protrusions  32   b  may be retractable relative to the card block  31   b , for example, the protrusions  32   b  may be provided to be resilient to facilitate the card block  31   b  to be held after crossing the protrusions  32   b . In other embodiments, the card block  31   b  may also be resilient, and the card block  31   b  may be provided with a resilient structure similar to the convex rib  32   b  (i.e., the second resilient member  323   b  is provided with the first holding slot  321   b ); or both the card block  31   b  and the convex rib  32   b  may be resilient; the convex rib  322   b  may be resilient without the second resilient member  323   b , and the convex rib  322   b  may itself be a resilient material or be provided with a The cam  322   b  may be a resilient material itself or may be provided as a suspended structure. In other embodiments, the locking part  12   b  is a sliding latch, the block  31   b  is set on the locking part  12   b  of the second locking mechanism  1   b  and can move with the locking part  12   b , and the protrusion  32   b  is set on the second locking bit  2   b  and remains stationary with respect to the block  31   b.    
     Further, as shown in  FIG.  29   , in this embodiment, the cam  32   b  further includes a second holding slot  324   b  opened on the second locking mechanism  1   b , a cam body  325   b  that can be accommodated in the second holding slot  324   b  and a third elastic member  326   b  located between the cam body  325   b  and the second holding slot  324   b , and the cam body  325   b  can, under the action of the third elastic member  326   b  The third elastic member  326   b  can be stretched relative to the second holding slot  324   b  by the action of the third elastic member  326   b . When the third elastic member  326   b  is extended, the projection  322   b  is located above the card block  31   b , and the projection  322   b  may not be held with the card block  31   b ; when the third elastic member  326   b  is compressed, the projection  322   b  is located at the same level as the card block  31   b  (or the projection  322   b  is located on the flip movement trajectory of the card block  31   b ), at which time the projection  322   b  may be held with the card block  31   b , and the flip locking portion  12   b  can make the card block  31   b  stuck on the side of the convex rib  32   b  away from the center of the storage box  20   b  (i.e., remain in the unlocked state). Such a setting prevents misuse by the user while the two storage bins  20   b  are not yet stacked, i.e., it does not have a hold unlock function while the two storage bins  20   b  are not yet stacked. In other embodiments, the card block  31   b  may also be resilient by setting the card block  31   b  to a resilient structure similar to that of the convex ribbed body  325   b  (i.e., by setting the third resilient member  326   b  with the second holding slot  324 b). 
     Fourth Embodiment 
     As shown in  FIGS.  30 - 36   , different from the above embodiment 1: the second locking mechanism  1   c  of the storage box  20   c  (which can be the secondary storage box in the above embodiment 1) in this embodiment is set on the third end face  201   c , which includes the first locking buckle  11   c  and the second locking buckle  12   c  which is connected to the first locking buckle  11   c  by transmission, and the second locking buckle  12   c  can drive the first locking buckle  11   c  to move, thus The second locking buckle  12   c  can drive the first locking buckle  11   c  to move, so that the second locking buckle  12   c  and the first locking buckle  11   c  are simultaneously locked and unlocked with the second locking position  2   c , thus enabling the interlocking function between two adjacent storage boxes  20   c , which is convenient and fast. 
     The first locking buckle  11   c  has a first limiting member  111   c  protruding in the direction away from the second locking buckle  12   c , and the first locking buckle  11   c  is provided in correspondence with the first snap hook  21   c  on the second locking position  2   c  set on the fourth end face  202   c , and the first snap hook  21   c  can form the first slot  211   c , so that the first limiting member  111   c  can extend into the first slot  211   c . Specifically, when two storage bins  20   c  are stacked and provided, the first limiting member  111   c  of one of the storage bins  20   c  is embedded in the first slot  211   c  of the other storage bin  20   c , thereby limiting the vertical displacement between the two storage bins  20   c , thereby achieving interlocking between the two storage bins  20   c . In other embodiments, the locking of the first limiting member  111   c  with the first slot  211   c  may also limit both vertical and horizontal displacements between the two lockers  20   c . In this embodiment, the first slot  211   c  is formed on the first snap hook  21   c , but the structure forming the first slot  211   c  is not limited thereto. The first limiting member  111   c  is provided with a first guiding ramp  112   c  and the first snap hook  21   c  is provided with a second guiding ramp  212   c , thereby facilitating the first limiting member  111   c  to slide into the first slot  211   c . In this embodiment, the number of first locking clasps  11   c  corresponds to the number of second locking clasps  12 c; in other embodiments, multiple first locking clasps  11   c  may also be provided. 
     The second locking buckle  12   c  is a horizontal sliding buckle, and drive the first locking buckle  11   c  for horizontal movement; specifically, a second locking buckle  12   c  can drive at least one first locking buckle  11   c  and the second locking bit  2   c  lock and unlock each other, so as to easily and quickly achieve the interlocking function between the two storage boxes  20   c , convenient for stacking and rapid separation between multiple storage boxes  20   c . In this embodiment, the number of first locking buckle  11   c  corresponds to the number of second locking buckle  12   c ; in other embodiments, a second locking buckle  12   c  can also be set to drive a plurality of first locking buckle  11   c  to move at the same time; when a second locking buckle  12   c  drives a plurality of first locking buckle  11   c  to move, because a plurality of first locking buckle  11   c  makes horizontal movement, therefore, a plurality of first locking buckle  11   c  is not limited to be set at the edge position of the storage box  20   c , it can be set at the middle position of the storage box  20   c , so that the locking between the storage box  20   c  is more solid and reliable. In other embodiments, the second locking buckle  12   c  is a flip buckle and drives the first locking buckle  11   c  for horizontal movement; or the first locking buckle  11   c  is also a flip buckle, and the second locking buckle  12   c  drives the first locking buckle  11  for flip movement. 
     The second locking buckle  12   c  includes a drive part  121   c , a second limiting member  122   c  connected to the drive part  121   c  and a resilient member  123   c . The second locking buckle  12   c  has a first position interlocked with the second locking position  2   c  and a second position interlocked with the second locking position  2   c ; when the second locking buckle  12   c  is in the first position, the second locking buckle  12   c  drives the first locking buckle  11   c  to interlock with the second locking position  2   c . the second locking buckle  12   c  drives the first locking buckle  11   c  to interlock with the second locking position  2   c  when the second locking buckle  12   c  is in the second position and the second locking buckle  12   c  drives the first locking buckle  11   c  to interlock with the second locking position  2   c  when the second locking buckle  12   c  is in the second position. 
     The drive member  121   c  is a rigid or soft material, which may be provided in an elongated structure and extend along the length of the bottom. In other embodiments, drive member  121   c  may also be a rigid or soft, thickly shaped, curved structure. The drive member  121   c  is disposed between the first locking clasp  11   c  and the second locking clasp  12   c  such that the second locking clasp  12   c  can control the movement of the first locking clasp  11   c  via the drive member  121   c . Further, the transmission member  121   c  is provided with a connecting part  121   ac , and the diameter of the connecting part  121   ac  is larger than the diameter of the transmission member  121   c , so that one end of the resilient member  123   c  is held against the connecting part  121   ac . In this embodiment, the number of transmission members  121   c  is two and side by side, and the first locking buckle  11   c  is fixed on the connecting part  121   ac  of the two transmission members  121   c , so as to enhance the stability of the first locking buckle  11   c  sliding. In other embodiments, multiple transmission members  121   c  may be provided; the transmission structure  121   c  may also be a gear transmission structure, a belt transmission structure, etc. 
     The second limiting member  122   c  is a rod-like structure, which can be interlocked with the second locking position  2   c ; specifically, the second limiting member  122   c  is located at one end of the two transmission members  121   c , and the second limiting member  122   c  is connected between the two transmission members  121   c , which is provided in correspondence with the second snap hook  22   c  on the second locking position  2   c , and the second snap hook  22   c  can form the second slot  221   c , so that the second limiting member  122   c  can extend into the second slot  221   c . Specifically, when two storage bins  20   c  are stacked, the second limiting member  122   c  of one of the storage bins  20   c  is embedded in the second slot  221   c  of the other storage bin  20   c , thereby further limiting the vertical displacement between the two storage bins  20   c , and the two storage bins  20   c  have two fixing points between the front and rear, for better fixing effect. In other embodiments, the locking of the second limiting member  122   c  with the second slot  221   c  may also limit both vertical and horizontal displacement between the two storage bins  20   c . In this embodiment, the second slot  221   c  is formed on the second snap hook  22   c , but the structure forming the second slot  221   c  is not limited to this. The second snap hook  22   c  is provided with a third guide ramp  222   c , thereby facilitating the second limiting member  122   c  to slide into the second slot  221   c.    
     One end of the resilient member  123   c  abuts against the second locking mechanism  1   c  and the other end abuts against the storage box  20   c . In this embodiment, one end of the resilient member  123   c  abuts against the attachment portion  121   ac  on the drive member  121   c  and the other end abuts against the storage box  20   c . In other embodiments, one end of the resilient member  123   c  may also be abutted against the first locking clasp  11 c. Specifically, the resilient member  123   c  can make the drive member  121   c  of the second locking buckle  12   c  automatically located in the first position to keep the first locking buckle  11   c  automatically in the locked state, the drive member  121   c  moved to the second position by external force, the drive member  121   c  drive the first locking buckle  11   c  into the unlocked state. The resilient member  123   c , such as a spring, the resilient member  123   c  is set on the transmission member  121   c  and one end is connected to the connection  121 ac, and the other end of the resilient member  123   c  is connected to the storage box  20   c , and the second locking buckle  12   c  is automatically fixed in the first position by the elastic force of the resilient member  123   c , so as to realize the automatic locking of the first locking buckle  11   c  and the second locking buckle  12   c.    
     Further, the second locking buckle  12   c  also includes a tie bar  124   c that can be connected to a plurality of transmission members  121   c , in this embodiment, the tie bar  214   c is provided at one end of the two transmission members  121   c  away from the connecting part  121   ac  and connected to the two transmission members  121   c . The lever  214   c is used to allow the user to pull the drive members  121   c  to unlock the first locking buckle  11   c . In other embodiments, a plurality of pull rods  214   c may be provided. 
     Further, the second locking buckle  12   c  also includes a connecting rod  215   c  that can connect a plurality of rods  214   c . In this embodiment, the connecting rod  215   c  is set between the rods  214   c of the two second locking buckles  12   c  and can drive a plurality of rods  214   c to move; when the number of second locking buckles  12   c  is two and set side by side, the two rods  214   c are connected to each other by the connecting rod  215   c . The storage box  20   c  corresponding to the position of the connecting rod  215   c  is provided with avoidance groove, pulling the connecting rod  215   c  can move the transmission member  121   c , so that pulling the connecting rod  215   c  can simultaneously control the movement of the two second locking buckle  12   c . In this embodiment, the locker  20   c  is also provided with a handheld section  203   c . The handheld section  203   c  is provided on the same side as the rod  215   c  to facilitate the user to lift the locker  20   c  while unlocking it. in other embodiments, the rod  215   c  can also be used as the handheld section  203   c  to simplify the design and achieve multiple uses of the rod  215   c.    
     The technical features of the above described embodiments can be combined in any number of ways. For the sake of brevity of description, not all possible combinations of the technical features of the above described embodiments are described, however, as long as the combinations of these technical features are not contradictory, they should be considered to be within the scope of the present specification. 
     While the principles of the invention have been described herein, it is to be understood by those skilled in the art that this description is made only by way of example and not as a limitation as to the scope of the invention. Other embodiments are contemplated within the scope of the present invention in addition to the exemplary embodiments shown and described herein. Modifications and substitutions by one of ordinary skill in the art are considered to be within the scope of the present invention, which is not to be limited except by the following claims.