Connecting structure of modules, storage box and storage box assembly

Abstract

The invention provides a connecting structure of a module. The connecting structure comprises a first connecting part located on one surface of the module, a second connecting part located on the other surface of the module and a stop part. The first connecting part comprises a mounting part, a locking part capable of moving relative to the mounting part, and a first elastic piece positioned between the mounting part and the locking part; the second connecting part comprises a matching part which can be mutually locked with the locking part; the locking part is arranged on the first connecting part, the locking part is arranged on the locking part and can move along with the locking part, when the locking part is clamped with the second connecting part, the locking part cannot be automatically locked, and the first connecting part and the second connecting part are kept in an unlocking state. According to the module connecting structure provided by the invention, the functions of automatic locking, unlocking keeping and automatic resetting can be realized, so that a user can operate and use the module conveniently.

Description

[0001] This application is a divisional application of application number 202210212862.5, application date March 4, 2022, and invention title "Module Connection Structure, Storage Box and Storage Box Assembly". Technical Field

[0002] This invention relates to the field of item storage technology, and in particular to a module connection structure, a storage box, and a storage box assembly. Background Technology

[0003] In a standard storage box system, each box is placed individually, and even if they can be stacked one on top of another, they can only be kept level. However, for families and professional users who need to buy multiple boxes, if there is no interlocking function between two boxes, multiple boxes stacked several times can easily tip over, posing a safety hazard. This is especially true when multiple boxes need to be moved simultaneously, as the shift in the center of gravity during dragging and vibrations caused by uneven surfaces make it even easier for the top box to tip over.

[0004] To avoid these problems, the current common solution is to add extra accessories such as ropes to help secure multiple boxes. However, this solution not only increases costs but also requires untying the ropes to retrieve the items, causing inconvenience in actual use.

[0005] In view of this, it is indeed necessary to provide a module connection structure, a storage box, and a storage box assembly to solve this problem. Summary of the Invention

[0006] The purpose of this invention is to provide a connection structure for a storage box, which aims to overcome the shortcomings of the aforementioned background technology and can realize automatic locking, hold-unlock, and automatic reset functions, thereby facilitating user operation and use.

[0007] The present invention provides a connection structure for a module, including a first connecting portion located on one surface of the module, a second connecting portion located on another surface of the module, and a stop portion;

[0008] The first connecting part includes a mounting part, a locking part movable relative to the mounting part, and a first elastic member located between the mounting part and the locking part, wherein the first elastic member causes the locking part to automatically remain in a locked state;

[0009] The second connecting part includes a mating part that can be locked to the locking part. Pressing down the locking part of one module can automatically lock the mating part of it with the other module under the action of the first elastic member.

[0010] The stop part is disposed on the locking part and can move with the locking part. When the stop part is engaged with the second connecting part, the locking part cannot lock automatically, and the first connecting part and the second connecting part are in an unlocked state.

[0011] Furthermore, the stop portion is retractable; when the first connecting portion and the second connecting portion are in an unlocked state, the stop portion extends; when the first connecting portion and the second connecting portion are in a locked state, the stop portion compresses.

[0012] Furthermore, the stop portion includes a receiving groove formed on the locking portion, a locking block that can be accommodated in the receiving groove, and a second elastic member located between the receiving groove and the locking block; when the second elastic member extends, the locking block extends out of the receiving groove, and when the second elastic member is compressed, the locking block is compressed in the receiving groove.

[0013] Furthermore, the second connecting portion also includes a recessed portion, and when the first connecting portion and the second connecting portion are in the unlocked state, the stop portion is engaged with the recessed portion.

[0014] Furthermore, the mating part comprises a plurality of slots, the number of which corresponds to the number of locking buckles in the locking part.

[0015] The present invention provides a storage box, wherein the storage box is provided with a connection structure of the module as described in any of the preceding claims, the first connection part is provided on the lid of the storage box, and the second connection part is provided on the bottom of the storage box body.

[0016] Furthermore, the lid is provided with a positioning groove, and the first connecting part is located at the edge of the positioning groove.

[0017] Furthermore, the mounting part includes a mounting slot formed on the storage box and a mounting body located within the mounting slot.

[0018] Furthermore, the locking part includes a locking body and a locking buckle located on the side of the locking body near the center of the storage box; when the first connecting part and the second connecting part are locked together, the locking buckle extends into the positioning groove / exits the mounting groove; when the first connecting part and the second connecting part are unlocked together, the locking buckle does not extend into the positioning groove / exits the mounting groove.

[0019] The present invention provides a storage box assembly, including a first connecting portion located on the surface of one storage box, a second connecting portion located on the surface of another storage box, and a stop portion;

[0020] The first connecting part includes a mounting part, a locking part movable relative to the mounting part, and a first elastic member located between the mounting part and the locking part, wherein the first elastic member causes the locking part to automatically remain in a locked state;

[0021] The second connecting part includes a mating part that can be locked to the locking part. Pressing down the locking part of the first storage box can automatically lock the mating part of the first storage box under the action of the first elastic member.

[0022] The stop part is disposed on the locking part and can move with the locking part. When the stop part is engaged with the second connecting part, the locking part cannot lock automatically, and the first connecting part and the second connecting part are in an unlocked state.

[0023] The storage box connection structure provided by this invention allows the locking part to move relative to the mounting part, and the first elastic member can drive the locking part to automatically remain in the locked state. When both storage boxes are locked, the locking part of one storage box can automatically lock with the mating part of the other storage box under the action of the first elastic member, thereby realizing the automatic locking function of the first connecting part and the second connecting part. At the same time, by setting a stop part, the stop part can be used to hold the locking part on the locking path, keeping the first connecting part and the second connecting part in an unlocked state, thus eliminating the need to manually keep the locking part in the unlocked state and freeing the user's hands. Furthermore, when the two storage boxes are unlocked and disengaged, the locking part can automatically reset under the drive of the first elastic member, preparing for the next locking, simplifying the locking operation steps and making it convenient for users. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the storage box in the first embodiment of the present invention.

[0025] Figure 2 for Figure 1 A sectional view.

[0026] Figure 3 This is a schematic diagram of another three-dimensional structure of the storage box in the first embodiment of the present invention.

[0027] Figure 4 for Figure 3 A schematic diagram of a localized explosion structure.

[0028] Figure 5 for Figure 4 A 3D view of a storage box.

[0029] Figure 6 for Figure 4 Another 3D view of the storage box in the middle.

[0030] Figure 7for Figure 6 An exploded view of the middle section of the structure.

[0031] Figure 8 This is a three-dimensional structural diagram of the storage box in the second embodiment of the present invention.

[0032] Figure 9 for Figure 8 A schematic diagram of a localized explosion structure.

[0033] Figure 10 for Figure 8 A schematic diagram of the relationship between the stopping part and the locking part.

[0034] Figure 11 for Figure 10 A schematic diagram of the structure of the first connecting part.

[0035] Figure 12 for Figure 11 A schematic diagram of the explosion structure.

[0036] Figure 13 for Figure 10 A schematic diagram of the stop mechanism.

[0037] Figure 14 for Figure 13 A schematic diagram of the explosion structure. Detailed Implementation

[0038] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0039] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification and claims of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0040] The directional terms such as "up," "down," "left," "right," "front," "back," "top," and "bottom" (if present) used in the specification and claims of this invention are defined by the position of the structures in the drawings and the relative positions of the structures, and are only for the clarity and convenience of expressing the technical solution. It should be understood that the use of directional terms should not limit the scope of protection claimed in this application.

[0041] This invention provides a modular connection structure, a storage box with the connection structure, and a storage box assembly. The connection structure can be installed on the storage box, and adjacent storage boxes can be locked together via the connection structure, thereby facilitating the transportation of multiple storage boxes. The storage box can be a toolbox, tool basket, transport box, transfer box, or other storage device.

[0042] First Embodiment

[0043] like Figures 1 to 7 As shown, this embodiment provides a module connection structure that can be installed on a storage box. The connection structure includes a first connecting part 1, a second connecting part 2, and a stop part 3. The first connecting part 1 and the second connecting part 2 can cooperate to automatically lock together. The stop part 3 prevents the first connecting part 1 and the second connecting part 2 from automatically locking after unlocking, thus keeping the first connecting part 1 and the second connecting part 2 in an unlocked state. This facilitates unlocking and separation of the first connecting part 1 and the second connecting part 2, freeing the user's hands and making it easier for the user to use.

[0044] Furthermore, such as Figure 6 and Figure 7 As shown, in this embodiment, the first connecting part 1 is disposed on the lid of the storage box, and includes a mounting part 11, a locking part 12 movable relative to the mounting part 11, and a first elastic member 13 located between the mounting part 11 and the locking part 12. The locking part 12 can be automatically held in a locked state under the action of the first elastic member 13. In addition, in order to facilitate the positioning when the first connecting part 1 and the second connecting part 2 are interlocked, a positioning groove 41 can be provided on the lid. The positioning groove 41 can just accommodate the bottom of the box, and the first connecting part 1 can be disposed at the edge of the positioning groove 41. In other embodiments, the positioning groove 41 can be used to position the storage boxes when stacked with a protrusion provided on the bottom of the box.

[0045] Furthermore, such as Figure 7 As shown, in this embodiment, the mounting part 11 is fixedly connected to the cover. The mounting part 11 includes a mounting groove 111 formed on the cover and a mounting body 112 located in the mounting groove 111. The mounting body 112 can be fixed in the mounting groove 111 with bolts. In other embodiments, the mounting body 112 can also be integrally formed with the mounting groove 111, or fixedly connected by snap-fit ​​or other means.

[0046] Furthermore, such as Figure 7As shown, in this embodiment, the locking part 12 can be accommodated within the mounting body 112 and is movable relative to the mounting body 112. The locking part 12 is a sliding latch that moves horizontally relative to the mounting part 11, thereby allowing the locking part 12 to move horizontally within the mounting groove 111. In other embodiments, the locking part 12 may also be a flip latch that moves relative to the mounting part 11 or a rotary latch that moves relative to the mounting part 11. The locking part 12 includes a locking body 121 that can be accommodated within the mounting body 112 and a locking buckle 122 located on the side of the locking body 121 near the center of the storage box; when the locking buckle 122 extends out of the mounting part 11 (i.e., the locking buckle 122 extends into the positioning groove 41), the first connecting part 1 and the second connecting part 2 can be locked together; when the locking buckle 122 does not extend out of the mounting part 11 (i.e., the locking buckle 122 does not extend into the positioning groove 41), the first connecting part 1 and the second connecting part 2 can be unlocked together. Meanwhile, in order to facilitate locking between the locking buckle 122 and the second connecting part 2, the locking buckle 122 is provided with a bevel 122a.

[0047] Furthermore, such as Figure 7 As shown, in this embodiment, the first elastic member 13 is located between the locking body 121 and the mounting body 112, thereby automatically keeping the locking part 12 in the locked state under the action of the first elastic member 13. Meanwhile, to improve the reliability of the movement of the locking part 12, two first elastic members 13 can be provided, located at opposite ends of the locking body 121. The first elastic member 13 is a compression spring, thereby allowing the locking part 12 to move horizontally; in other embodiments, the first elastic member 13 can also be a torsion spring, thereby allowing the locking part 12 to rotate.

[0048] Furthermore, such as Figure 5 As shown, in this embodiment, the second connecting part 2 is located at the bottom of the storage box, and includes a mating part 21 that can be locked with the locking part 12 and a recessed part 22 that can be engaged with the stop part 3. Pressing down the locking part 12 of one storage box can automatically lock it with the mating part 21 of the other storage box under the action of the first elastic member 13. In addition, in order to facilitate the mutual locking of the mating part 21 and the locking buckle 122, a protrusion 42 (here, the protrusion 42 is the bottom of the box) can be provided on the bottom of the box, and the protrusion 42 can be just accommodated in the positioning groove 41. When the first connecting part 1 and the second connecting part 2 are in the locked state, the locking buckle 122 interferes with the mating part 21; when the first connecting part 1 and the second connecting part 2 are in the unlocked state, the locking buckle 122 does not interfere with the mating part 21, and the stop part 3 is engaged with the recessed part 22. In other embodiments, when the first connecting part 1 and the second connecting part 2 are in the unlocked state, the stop part 3 can be directly engaged with the mating part 21. In addition, the mating part 21 consists of several slots 211, and the number of slots 211 can be set to correspond to the number of locking buckles 122.

[0049] Furthermore, such as Figure 6 and Figure 7 As shown, in this embodiment, the stop part 3 is disposed on the locking part 12 and can move horizontally with the locking part 12. When the locking part 12 is in the unlocked state, the stop part 3 can engage with the second connecting part 2 on the locking path of the locking part 12, preventing the locking part 12 from locking automatically, thus keeping the first connecting part 1 and the second connecting part 2 in an unlocked state. The stop part 3 includes a receiving groove 31 formed on the locking part 12, a locking block 32 that can be accommodated in the receiving groove 31, and a second elastic member 33 located between the receiving groove 31 and the locking block 32. The locking block 32 can extend and retract relative to the receiving groove 31 under the action of the second elastic member 33. Specifically, as shown... Figure 3 As shown, when the first connecting part 1 and the second connecting part 2 are in the unlocked state, the second elastic member 33 extends, and the locking block 32 extends out of the receiving groove 31; as Figure 1 and Figure 2 As shown, when the first connecting part 1 and the second connecting part 2 are in a locked state, the second elastic member 33 is compressed, and the locking block 32 is compressed into the receiving groove 31 by the pressure of the second connecting part 2.

[0050] The working principle of this embodiment is as follows:

[0051] When it is necessary to lock the two storage boxes, the upper storage box is pressed down so that it contacts the locking buckle 122 on the lower storage box. The locking buckle 122 of the lower storage box is compressed, causing the locking part 12 to move in the unlocking direction (i.e., away from the center of the storage box). At this time, the first elastic member 13 is compressed and stored. After the upper storage box moves down a certain distance, the locking buckle 122 on the locking part 12 corresponds to the slot 211 on the mating part 21. The locking buckle 122 loses the supporting effect of the upper storage box and automatically engages with the slot 211 under the drive of the first elastic member 13, thereby locking the first connecting part 1 and the second connecting part 2, thus realizing the automatic locking function of the upper and lower storage boxes. At this time, the stop part 3 is compressed in the receiving groove 31 by the compression of the second connecting part 2.

[0052] When it is necessary to unlock both storage compartments, pull the locking part 12 of the lower storage compartment outwards to move it in the unlocking direction. After the locking part 12 moves a certain distance in the unlocking direction, the locking buckle 122 of the lower storage compartment disengages from the slot 211 of the upper storage compartment, thereby unlocking the locking part 12 and the mating part 21. At the same time, continue to pull the locking part 12 in the unlocking direction until the stop part 3 loses the pressure of the upper storage compartment. Under the action of the second elastic member 32, the locking block 31 automatically extends upwards into the receiving groove 31 and engages with the recessed part 22, thereby keeping the first connecting part 1 and the second connecting part 2 in an unlocked state, thus realizing the unlocked state function. At this time, simply pull up the upper storage compartment to easily unlock and separate the two storage compartments. At the same time, if the user wants to relock, simply press down on the locking block 31 to retract it into the receiving groove 31. After the upper and lower storage compartments are separated, the locking block 31 remains extended under the action of the second elastic member 32, and the locking part 12 automatically resets to the locked state under the drive of the first elastic member 13, preparing for the next locking.

[0053] The advantages of the connection structure of the storage box provided in this embodiment include:

[0054] 1. The connection structure of this storage box has an automatic locking function, an unlocking retention function, and an automatic reset function: Since the locking part 12 can move horizontally relative to the mounting part 11, and the first elastic member 13 can drive the locking part 12 to automatically remain in the locked state. When the two storage boxes are locked, the locking part 12 of one storage box can automatically lock with the mating part 21 of the other storage box under the action of the first elastic member 13, thereby realizing the automatic locking function of the first connecting part 1 and the second connecting part 2; at the same time, by setting the stop part 3, the stop part 3 cooperates with the second connecting part 2, so that the first connecting part 1 and the second connecting part 2 can remain in the unlocked state when unlocking, without having to manually keep the locking part 12 in the unlocked state, thus freeing the user's hands; at the same time, after the two storage boxes are unlocked and separated, the locking part 12 can automatically reset under the drive of the first elastic member 13, preparing for the next locking, simplifying the operation steps of locking and unlocking (conventional locking and unlocking requires at least four steps, while this embodiment only requires two steps), making it convenient for users.

[0055] 2. The locking function is achieved by the cooperation of the stop part 3 and the second connecting part 2. When the user wants to lock again (due to accidental unlocking), he / she only needs to press down the card block 31. There is no need to separate the first connecting part 1 and the second connecting part 2 to lock again, and the reliability of the structure is not compromised.

[0056] Second Embodiment

[0057] like Figures 8 to 14As shown, the difference between this embodiment and the first embodiment is that the locking part 12 is a flip lock, and the stop part 3 is disposed on the second connecting part 2 and remains stationary relative to the locking part 12. When the first connecting part 1 and the second connecting part 2 are in the unlocked state, the stop part 3 and the locking part 12 are engaged on the locking path of the locking part 12.

[0058] Specifically, the locking part 12 includes a locking buckle 122 and a stop buckle 123. The locking buckle 122 can cooperate with the mating part 21 to lock, and the stop buckle 123 is correspondingly provided with the stop part 3. The stop buckle 123 can engage with the stop part 3 on the locking path of the locking part 12, thereby keeping the first connecting part 1 and the second connecting part 2 in an unlocked state. The extension length of the locking buckle 122 in the locking direction is less than the extension length of the stop buckle 123 in the locking direction, so that the angle of rotation required to release the stop buckle 123 and the stop part 3 on the locking path is the maximum. When the second elastic member 33 is compressed, the locking buckle 122 and the mating part 21 are locked together, and the locking block 32 and the stop buckle 123 abut against each other in the vertical direction, and the first connecting part 1 and the second connecting part 2 are in a locked state. When the second elastic member 33 is extended, the locking block 32 extends out of the receiving groove 31 and engages with the stop buckle 123 on the locking path, and the first connecting part 1 and the second connecting part 2 are in an unlocked state. In other embodiments, the locking block 32 and the stop buckle 123 may also abut on other non-locking paths, such as the locking block 32 and the stop buckle 123 abutting in the left and right direction. The stop buckle 123 only needs to hold the locking block 32 against the non-locking path to be within the scope of protection of this invention.

[0059] Furthermore, such as Figure 9 and Figure 13 As shown, in this embodiment, the stop part 3 further includes a fixing groove 34 formed on the second connecting part 2 and a fixing block 35 located at the end of the locking block 32 away from the second elastic member 33. The fixing block 35 can slide into the fixing groove 34. When the fixing block 35 is located in the fixing groove 34, the second elastic member 33 is compressed, so that the stop part 3 is always fixed above the stop buckle 123. This arrangement allows the unlocking function to be selectively opened and closed, which is convenient for users. In other embodiments, the fixing groove 34 can also be formed on the first connecting part 1, as long as the stop part 3 cannot be located on the locking path of the locking part 12 (i.e., the stop part 3 cannot contact the stop buckle 123), it is within the scope of protection of this invention.

[0060] The working principle of this embodiment is as follows:

[0061] When it is necessary to lock the two storage boxes, the upper storage box is pressed down so that it contacts the locking buckle 122 on the lower storage box. The locking buckle 122 of the lower storage box is compressed, causing the locking part 12 to move in the unlocking direction (i.e., away from the center of the storage box). At this time, the first elastic member 13 is compressed and stores force. After the upper storage box moves down a certain distance, the locking buckle 122 on the locking part 12 corresponds to the slot 211 on the mating part 21. The locking buckle 122 loses the supporting effect of the upper storage box and automatically engages with the slot 211 under the drive of the first elastic member 13, thereby locking the first connecting part 1 and the second connecting part 2, thus realizing the automatic locking function of the upper and lower storage boxes. It should be noted that during this process, when the upper storage box is pressed down, the locking block 32 is compressed by the stop buckle 123, and the second spring 33 is compressed and stores force. The stop buckle 123 and the locking block 32 always maintain vertical support.

[0062] When it is necessary to unlock both storage compartments, pull the locking part 12 of the lower storage compartment outwards to move it in the unlocking direction. After the locking part 12 moves outwards a certain distance, the locking buckle 122 of the lower storage compartment disengages from the slot 211 of the upper storage compartment, thereby unlocking the locking part 12 and the mating part 21. At the same time, continue to pull the locking part 12 outwards until the stop part 3 loses the resistance of the stop buckle 123 of the lower storage compartment. Under the action of the second elastic member 32, the locking block 31 automatically extends downwards into the receiving groove 31 and engages with the stop buckle 123 on the locking path of the locking part 12, thereby keeping the first connecting part 1 and the second connecting part 2 in an unlocked state, thus realizing the unlocked state function. At this time, simply pull up the upper storage compartment to easily unlock and separate the two storage compartments. At the same time, if the user wants to relock, simply pull up the locking block 31 to make the locking block 31 engage with the stop buckle 123 again. After the upper and lower storage compartments are separated, the locking block 31 remains extended under the action of the second elastic member 32, and the locking part 12 automatically resets to the locked state under the drive of the first elastic member 13, preparing for the next locking.

[0063] The connection structure of the storage box provided in this embodiment also has automatic locking function, hold-unlock function and automatic reset function. Other structures and functions of this embodiment are the same as or similar to those of the first embodiment, and will not be described in detail here.

[0064] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A module connection structure, characterized in that, It includes a first connecting portion located on one surface of the module, a second connecting portion located on the other surface of the module, and a stop portion; The first connecting part includes a mounting part, a locking part movable relative to the mounting part, and a first elastic member located between the mounting part and the locking part, wherein the first elastic member causes the locking part to automatically remain in a locked state; The second connecting part includes a mating part that can be locked to the locking part. Pressing down the locking part of one module can automatically lock the mating part of it with the other module under the action of the first elastic member. The stop part is disposed on the locking part and can move with the locking part. When the stop part is engaged with the second connecting part, the locking part cannot lock automatically, and the first connecting part and the second connecting part are in an unlocked state.

2. The connection structure of the module according to claim 1, characterized in that, The stop portion is retractable; when the first connecting portion and the second connecting portion are in an unlocked state, the stop portion extends; when the first connecting portion and the second connecting portion are in a locked state, the stop portion compresses.

3. The connection structure of the module according to claim 2, characterized in that, The stop portion includes a receiving groove formed on the locking portion, a locking block that can be accommodated in the receiving groove, and a second elastic member located between the receiving groove and the locking block; when the second elastic member extends, the locking block extends out of the receiving groove, and when the second elastic member compresses, the locking block is compressed in the receiving groove.

4. The connection structure of the module according to claim 1, characterized in that, The second connecting portion further includes a recessed portion, and when the first connecting portion and the second connecting portion are in the unlocked state, the stop portion is engaged with the recessed portion.

5. The connection structure of the module according to claim 1, characterized in that, The mating part consists of several slots, and the number of slots corresponds to the number of locking buckles in the locking part.

6. A storage box, characterized in that, The storage box is provided with a connection structure for the module as described in any one of claims 1 to 5, wherein the first connection part is provided on the lid of the storage box, and the second connection part is provided on the bottom of the storage box body.

7. The storage box according to claim 6, characterized in that, The lid is provided with a positioning groove, and the first connecting part is located at the edge of the positioning groove.

8. The storage box according to claim 6, characterized in that, The mounting section includes a mounting slot formed on the storage box and a mounting body located within the mounting slot.

9. The storage box according to claim 7 or 8, characterized in that, The locking part includes a locking body and a locking buckle located on the side of the locking body near the center of the storage box; when the first connecting part and the second connecting part are locked together, the locking buckle extends into the positioning groove / exits the mounting groove; when the first connecting part and the second connecting part are unlocked together, the locking buckle does not extend into the positioning groove / exits the mounting groove.

10. A storage box assembly, characterized in that, It includes a first connecting part located on the surface of one storage box, a second connecting part located on the surface of another storage box, and a stop part; The first connecting part includes a mounting part, a locking part movable relative to the mounting part, and a first elastic member located between the mounting part and the locking part, wherein the first elastic member causes the locking part to automatically remain in a locked state; The second connecting part includes a mating part that can be locked to the locking part. Pressing down the locking part of the first storage box can automatically lock the mating part of the first storage box under the action of the first elastic member. The stop part is disposed on the locking part and can move with the locking part. When the stop part is engaged with the second connecting part, the locking part cannot lock automatically, and the first connecting part and the second connecting part are in an unlocked state.

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