Mounting structure, reversible tray and shelving unit

Abstract

The utility model provides a kind of mounting structure, reversible tray and storage rack, it is related to tool field, including connecting piece one, connecting piece two and locking handle, under assembly state, connecting piece two is detachably fixed connection with connecting piece one by fixing part, and it is formed fastening space to buckle;Locking handle passes through the window being equipped on connecting piece two and its cam end is detachably hinged in the assembly slot inside being equipped on connecting piece one;Locking handle can rotate relative to connecting piece two, so that its cam end is extruded towards the inside of fastening space or moves towards the direction of exiting fastening space.The utility model can install tray or other accessories on storage rack or other arbitrary existing tool's frame body with connecting rod, so that accessory can be fixed at any angle relative to connecting rod according to the demand of space scene, relieve the technical problem that tray or other accessories cannot be folded and occupy space or can only be fixed at a certain angle after folding in prior art, cannot meet the needs of multiple scenes.

Description

Technical Field

[0001] This utility model relates to the field of tools, and in particular to an installation structure, a flip-up tray, and a shelf. Background Technology

[0002] With the increasing utilization of modern living spaces and the growing demand for multifunctional storage, shelving units have become widely used in homes, offices, and commercial spaces as common storage tools. Traditional shelving structures typically employ a tiered design, creating storage space through horizontal partitions. To expand their functionality, existing technologies often incorporate tray structures on the shelving unit to hold small items, organize them in categories, or serve as temporary trays for holding maintenance tools during repairs. For example, on industrial shelves, they are used to support tools or spare parts.

[0003] Fixed pallets are mainly installed using mechanical connections such as welding, bolting, or slotting. Once installed, the pallet cannot be folded. When not in use, it occupies a lot of space and may interfere with the normal workflow of staff (e.g., staff walking in the warehouse). Although some existing racks have foldable pallets, these foldable pallets usually have a fixed support angle and cannot be fixed at any angle. Their angle cannot be flexibly adjusted according to the space and the size of the items. Utility Model Content

[0004] The purpose of this invention is to provide an installation structure, a flip-up tray, and a shelf to alleviate the aforementioned technical problems in the prior art.

[0005] To achieve the above objectives, the embodiments of this utility model adopt the following technical solutions: In a first aspect, this utility model provides an installation structure for reversibly installing accessories onto a connecting rod, the installation structure comprising: A connector 1 has a recessed portion on one side surface, and a mounting groove communicating with the interior of the area enclosed by the recessed portion is provided on the connector 1 near the recessed portion; the connector 1 also has an accessory mounting portion for fixing the connector 1 to the accessory. The second connector has a U-shaped notch that runs through three sides on one side, and at least one of the two side walls facing each other of the U-shaped notch has a window. The locking handle has a first end in the length direction forming a cam end with an outer contour in the shape of a cam, and one side surface in the length direction forming a curved surface that is concave to the other side. In the assembled state, the parts corresponding to the opposite side walls of the second connector and its U-shaped notch are detachably and fixedly connected to the parts of the first connector located on both sides of its recess by fasteners, so that the U-shaped notch and the recess are interlocked to form a fastening space that is axially connected at both ends; the locking handle passes through the window provided on the corresponding side of the second connector and its cam end is detachably hinged to the assembly groove provided on the first connector; the locking handle can rotate relative to the second connector so that its curved surface approaches or moves away from the side surface of the second connector away from its U-shaped notch, so that the cam end of the locking handle is pressed toward the inside of the fastening space or moves toward the direction of exiting the fastening space.

[0006] In an optional embodiment, there are two locking handles. The first connector is provided with the mounting groove on both sides of the recess. The windows are provided on both sides of the U-shaped notch facing each other. In the assembled state, the two locking handles pass through the windows on the corresponding sides of the second connector and their respective cam ends are detachably hinged to the mounting grooves on the corresponding sides of the first connector.

[0007] In an optional embodiment, the second connector is a plate-like structure bent into a U-shape.

[0008] In an optional embodiment, the fastener includes a bolt and a nut; In the assembled state, part of the first connector is located inside the U-shaped notch of the second connector. The shank of the bolt passes sequentially through the mounting hole located on one side wall of the opposite side wall of the U-shaped notch of the second connector, the mounting hole located on the first connector, and the mounting hole located on the other side wall of the opposite side wall of the U-shaped notch of the second connector, and is locked by the nut.

[0009] In an optional embodiment, the accessory mounting part includes a mounting hole provided in the connector and a locking nut coaxially fixed to one side of the mounting hole. In the assembled state, the shank of the locking bolt passes through the accessory, inserts into the mounting hole, and is threadedly connected to the locking bolt.

[0010] In an optional embodiment, the second end of the locking handle in the length direction is bent toward a side surface opposite to its curved surface to form a bent end.

[0011] In an optional embodiment, the mounting groove on the first connector has rotating shaft mounting holes on opposite side walls, and the cam end of the locking handle has a through hole. In the assembled state, a pin is inserted through the through hole, and the two ends of the pin are rotatably mounted on the rotating shaft mounting holes on opposite side walls inside the mounting groove.

[0012] In an optional embodiment, the side surface of the connector with the recess is taken as the first side surface of the connector, and the assembly groove is a notch formed at the junction of the first side surface and the other side surface adjacent to the first side surface.

[0013] Secondly, the present invention provides a flip-up tray, including a tray body and an installation structure provided in any of the optional embodiments of the first aspect, wherein at least two of the installation structures are arranged at intervals on one side of the tray body, and the connector of each of the installation structures is fixedly connected to the tray body through its respective accessory mounting part.

[0014] Thirdly, this utility model provides a storage rack, including a frame and a flip-up tray provided in the second aspect above. The frame has a connecting rod. In the assembled state, the connecting rod passes through the fastening space formed by the U-shaped notch and the recess in each of the mounting structures. The locking handle is rotatable relative to the second connector, so that the cam end of the locking handle moves toward the direction of squeezing into the fastening space to lock the tray body to the connecting rod, or so that the cam end of the locking handle moves toward the direction of exiting the fastening space to unlock the tray body to the connecting rod.

[0015] The embodiments of this utility model can achieve at least the following beneficial effects: This utility model embodiment can install a tray or other accessories on a shelf or any other existing tool frame with a connecting rod, so that the accessories can be fixed at any angle relative to the connecting rod according to the needs of the space scenario, thus alleviating the technical problem in the prior art that the tray or other accessories cannot be folded and occupy space or can only be fixed at a certain angle after folding, which cannot meet the needs of multiple scenarios.

[0016] Specifically, in use, the accessory is fixed to the accessory mounting part of connector one; connector one and connector two are located on both sides of the connecting rod along the length of the connecting rod. The parts of connector two and the corresponding side walls of its U-shaped notch are detachably fixed to the parts of connector one located on both sides of its recess by fasteners, so that the U-shaped notch and the recess are interlocked to form a fastening space that surrounds the connecting rod in the circumferential direction. The accessory can be rotated 360° around the connecting rod to any angle. By moving the cam end of the locking handle toward the direction of squeezing into the fastening space, the cam end of the locking handle presses against the outer wall of the connecting rod to form a stable clamping force, locking the accessory at the current angle and ensuring that the accessory will not shift or loosen due to external force after locking. To unlock, simply rotate (pull) the locking handle in the opposite direction to unlock.

[0017] In this embodiment of the utility model, the connecting rods include, but are not limited to, the connecting rods provided on the frame of the shelf, and the accessories include, but are not limited to, the tray.

[0018] In the installation structure provided by this utility model embodiment, the cooperation of connector one and connector two forms a fastening space that can surround the connecting rod circumferentially, allowing the accessory fixedly connected to connector one to rotate 360° around the connecting rod to any angle. Furthermore, the window on connector two, in conjunction with a locking handle hinged to connector one and equipped with a cam end, enables the clamping and releasing of the connecting rod, thereby achieving the function of locking or unlocking the accessory at any angle relative to the connecting rod. This satisfies the user's need to adjust the accessory's posture at any angle, and the locking and unlocking process requires no repetition. The mechanical linkage or additional locking tools allow for quick locking or unlocking via manual operation, improving ease of use. Notably, the mounting structure is independent of specific accessories or the shape of connecting rods, and the first and second connectors are separate structures. There is no need to operate the connecting rod through the fastening space; simply snap the first and second connectors together and install the locking handle. It can be installed on any existing tool rack with connecting rods, exhibiting excellent versatility and adaptability, and is suitable for various application scenarios, including but not limited to installing trays on the connecting rods of a shelf.

[0019] In addition, this utility model embodiment also provides several optional implementations of the above-mentioned installation structure. The specific implementation section of this specification will provide a detailed description and explanation of the specific structure and functional effects of these optional implementations. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 A schematic diagram of the split structure of the installation structure provided in the embodiment of this utility model; Figure 2 A schematic diagram of the assembly structure for assembling the mounting structure, accessories, and connecting rods provided in the embodiments of this utility model; Figure 3 for Figure 2 Partial structural explosion diagram; Figure 4 A schematic diagram of the overall structure of the storage rack provided in this embodiment of the utility model. Figure 1 ; Figure 5A schematic diagram of the overall structure of the storage rack provided in this embodiment of the utility model. Figure 2 .

[0022] Icons: 100-Mounting structure; 1-Connector 1; 11-Recessed part; 12-Assembly slot; 121-Spindle mounting hole; 13-Accessory mounting part; 2-Connector 2; 21-U-shaped notch; 22-Window; 3-Locking handle; 301-Cam end; 3011-Through hole; 302-Bent end; 3001-Curved surface; 4-Pin; 5-Fixing component; 200 - Accessories; 300-Connecting rod. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0025] It should be noted that similar labels and letters in the accompanying drawings indicate similar items. Therefore, once an item is defined in one accompanying drawing, it does not need to be further defined and explained in subsequent accompanying drawings.

[0026] In the description of this utility model, it should be noted that the terms "upper," "lower," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0027] Furthermore, the terms "horizontal" and "vertical" do not imply that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0028] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0030] First aspect This embodiment provides an installation structure, referring to... Figures 1 to 3 The mounting structure 100 is used to foldably mount the accessory 200 onto the connecting rod 300. Specifically, it includes a first connector 1, a second connector 2, and a locking handle 3. The first connector 1 has a recessed portion 11 on one side surface, and a mounting groove 12 communicating with the interior of the area enclosed by the recessed portion 11 is provided on the first connector 1. The first connector 1 also has an accessory mounting portion 13 for fixing the first connector to the accessory 200. The second connector 2 has a three-sided through-hole U-shaped notch 21 on one side, and at least one of the facing side walls of the U-shaped notch 21 has a window 22. The locking handle 3 has a first end in the length direction forming a cam end 301 with a cam-shaped outer contour, and a curved surface 3001 recessed to the other side on one side surface in the length direction of the locking handle 3.

[0031] In the assembled state, the parts corresponding to the opposite side walls of the second connector 2 and its U-shaped notch 21 are detachably fixed to the parts of the first connector 1 located on both sides of its recess 11 by the fastener 5, so that the U-shaped notch 21 and the recess 11 are fastened together to form a fastening space; the locking handle 3 passes through the window 22 provided on the corresponding side of the second connector 2 and its cam end 301 is detachably hinged to the assembly groove 12 provided on the first connector 1; the locking handle 3 can rotate relative to the second connector 2 so that its curved surface 3001 approaches or moves away from the side surface of the second connector 2 away from its U-shaped notch 21, so that the cam end 301 of the locking handle 3 is squeezed toward the inside of the fastening space or moves toward the direction of exiting the fastening space.

[0032] This embodiment allows the tray or other accessory 200 to be mounted on a shelf or any existing tool frame with a connecting rod 300, so that the accessory 200 can be fixed at any angle relative to the connecting rod 300 according to the needs of the space scenario. This alleviates the technical problem in the prior art that the tray or other accessory 200 cannot be folded and occupies space, or can only be fixed at a certain angle after folding, which cannot meet the needs of multiple scenarios.

[0033] Specifically, in use, the accessory 200 is fixed to the accessory mounting part 13 of the connector 1; along the length of the connecting rod 300, the connector 1 and the connector 2 are located on both sides of the connecting rod 300. The parts of the connector 2 and its U-shaped notch 21 corresponding to each other are detachably fixed to the parts of the connector 1 located on both sides of its recess 11 by the fixing part 5, so that the U-shaped notch 21 and the recess 11 are interlocked to form a fastening space surrounding the connecting rod 300 in the circumferential direction. The accessory 200 is rotated to any angle around the connecting rod 300 in a 360° circumferential direction. By moving the cam end 301 of the locking handle 3 toward the direction of squeezing into the fastening space, the cam end 301 of the locking handle 3 presses against the outer wall of the connecting rod 300 to form a stable clamping force, locking the accessory 200 at the current angle and ensuring that the accessory 200 will not shift or loosen due to external force after locking. When unlocking is required, the locking handle 3 can be unlocked by rotating (pulling) in the opposite direction.

[0034] In this embodiment, the connecting rod 300 includes, but is not limited to, the connecting rod provided on the shelf of the shelf, and the accessory 200 includes, but is not limited to, the tray.

[0035] In the installation structure provided in this embodiment, the connector 1 and connector 2 cooperate to form a fastening space that can surround the connecting rod 300 circumferentially, allowing the accessory 200, which is fixedly connected to connector 1, to rotate 360° around the connecting rod 300 to any angle. Furthermore, the window on connector 2 cooperates with the locking handle 3, which is hinged to connector 1 and has a cam end 301, to achieve the pressing and releasing of the connecting rod 300. This allows the accessory 200 to be locked or unlocked at any angle relative to the connecting rod 300, satisfying the user's need to adjust the accessory's posture at any angle. Moreover, the locking and unlocking process requires no complex mechanisms. Mechanical linkage or additional locking tools allow for quick locking or unlocking via manual operation, improving ease of use. In particular, the installation structure is independent of the shape of specific accessories 200 or connecting rods 300, and connector 1 and connector 2 are separate structures. There is no need to operate the connecting rod 300 through the fastening space; simply snap connector 1 and connector 2 together and install the locking handle 3. It can be installed on any existing tool rack with connecting rods 300, exhibiting good versatility and adaptability, and is suitable for various application scenarios, including but not limited to installing trays (accessories 200) on the connecting rods 300 of a shelf.

[0036] In an optional embodiment of this example, the locking handle 3 has two parts. The connector 1 has mounting grooves 12 on both sides of its recessed portion 11. The U-shaped notch 21 has windows 22 on both sides facing each other. In the assembled state, the two locking handles 3 pass through the windows 22 on the corresponding side of the connector 2 and their respective cam ends 301 are detachably hinged to the mounting grooves 12 on the corresponding side of the connector 1.

[0037] In this optional embodiment, by providing two locking handles 3 and mounting grooves 12 on both sides of the connector 1, the accessory 200 can be locked at two points symmetrically on both sides of the connecting rod 300. In vibration or dynamic environments, single-point locking structures are prone to loosening due to concentrated force. The dual-point locking scheme designed in this optional embodiment can provide a more uniform clamping force, reduce the uneven force caused by single-point locking, better resist external vibration and impact, and maintain the fixed position of the accessory 200 on the connecting rod 300, thereby improving the stability and reliability of the locking mechanism. At the same time, since two locking handles 3 are provided, the user can quickly lock and unlock by operating both handles simultaneously. Compared with designing a single locking handle 3, dual-point locking can distribute the operating force, reducing the operating force required for each handle, thereby improving the convenience of operation.

[0038] In an optional embodiment of this example, connector 2 is a U-shaped plate structure. In this optional embodiment, connector 2 is designed as a U-shaped plate structure, which can improve space utilization, simplify the assembly process, enhance structural strength and stability, and improve the uniformity of clamping force.

[0039] In an optional embodiment of this example, the fastener 5 includes a bolt and a nut. In the assembled state, part of the first connector 1 is located inside the U-shaped notch 21 of the second connector 2. The shank of the bolt passes sequentially through a mounting hole located on one side wall of the opposite side wall of the U-shaped notch 21 of the second connector 2, a mounting hole located on the first connector 1, and a mounting hole located on the other side wall of the opposite side wall of the U-shaped notch 21 of the second connector 2, and is locked by the nut. In this optional embodiment, by using bolts and nuts for fixing, a more secure connection can be provided between the first connector 1 and the second connector 2. The bolt and nut fixing method is simple and easy to implement. Assembly can be completed simply by passing the bolt through the corresponding mounting hole and locking it with the nut. This design reduces the steps and tools required for assembly, improves assembly efficiency, and facilitates not only initial assembly but also subsequent adjustment and maintenance.

[0040] In an optional embodiment of this example, the accessory mounting part 13 includes a mounting hole provided in the connector 1 and a locking nut coaxially fixed to one side of the mounting hole. In the assembled state, the shank of the locking bolt passes through the accessory 200, inserts into the mounting hole, and is threadedly connected to the locking bolt. In this optional embodiment, the fixing method of the locking bolt and locking nut provides a more secure connection, reduces assembly steps and tools, and facilitates subsequent adjustment and maintenance.

[0041] In an optional embodiment of this invention, the second end of the locking handle 3 along its length is bent toward a surface opposite to its curved surface 3001 to form a bent end 302. In this optional embodiment, the bent end 302 of the locking handle 3 is designed to make operation less strenuous. The bent end 302 provides better leverage, allowing the user to apply torque more easily during operation, reducing the force required and improving ease of use. Further optionally, anti-slip textures can be provided on the surface of the second end of the locking handle 3 along its length to increase the friction between the user's hand and the locking handle 3 when pulling it, further reducing the force required and improving ease of use.

[0042] In an optional embodiment of this example, the mounting groove 12 on the connector 1 has rotating shaft mounting holes 121 on opposite side walls, and the cam end 301 of the locking handle 3 has a through hole 3011. In the assembled state, a pin 4 passes through the through hole 3011, and both ends of the pin 4 are rotatably mounted in the rotating shaft mounting holes 121 on opposite side walls of the mounting groove 12. In this optional embodiment, the two ends of the pin 4 are rotatably mounted in the rotating shaft mounting holes 121 on opposite side walls of the mounting groove 12, forming a stable rotational connection. This design not only ensures the stability of the locking handle 3 when rotating, but also reduces the steps and tools required for disassembly and assembly. During assembly, simply passing the pin 4 through the through hole 3011 and inserting it into the rotating shaft mounting hole 121 completes the assembly. When maintenance or replacement is required, the pin 4 can be easily disassembled, facilitating user operations according to usage needs.

[0043] In an optional embodiment of this example, the side surface of the connector 1 with the recessed portion 11 is taken as the first side surface of the connector 1, and the mounting groove 12 is a notch formed at the junction of the first side surface and the other side surface adjacent to the first side surface. In this optional embodiment, the mounting groove 12 penetrates the first side surface and the other side surface adjacent to the first side surface, forming a notch. This design allows the cam end 301 of the locking handle 3 to be easily inserted into or disengaged from the mounting groove 12 from multiple directions, simplifying the disassembly and assembly process and improving the convenience of disassembly and assembly. Furthermore, the through design of the mounting groove 12 means that after the cam end 301 of the locking handle 3 is inserted into the mounting groove 12, it is subject to less directional constraint, making rotation more flexible.

[0044] In addition, to further increase the reliability of the installation structure provided in this embodiment in the locked state, anti-slip textures can be provided on the inner side of the U-shaped notch 21 provided in connector 1 and the inner side of the recess 11 provided in connector 2 to increase the friction between the connector and the connecting rod 300 in the tightened state.

[0045] Second aspect This embodiment provides a flip-up tray, see reference. Figure 2 and Figure 3 The flip-up pallet includes a pallet body and a mounting structure provided in any of the optional embodiments of the first aspect, wherein at least two mounting structures 100 are spaced apart on one side of the pallet body, and the connectors 1 of each mounting structure 100 are fixedly connected to the pallet body by their respective accessory mounting portions 13.

[0046] In this embodiment, a pallet body is equipped with at least two mounting structures 100, which can improve the stability of the pallet body installed on the frame connecting rod 300, prevent the pallet body from tipping over when it is unfolded and in use, and at the same time improve the load-bearing capacity of the pallet body.

[0047] Third aspect This embodiment provides a storage rack, see reference. Figure 4 and Figure 5 , combined Figures 1 to 3 The shelf includes a frame and a flip-up tray as described in the second aspect. The frame has a connecting rod 300. In the assembled state, the connecting rod 300 passes through the fastening space formed by the U-shaped notch 21 and the recess 11 in each mounting structure 100. The locking handle 3 can rotate relative to the connecting member 2, so that the cam end 301 of the locking handle 3 moves in the direction of squeezing into the fastening space, thereby locking the tray body to the connecting rod 300; or, the cam end 301 of the locking handle 3 moves in the direction of exiting the fastening space, thereby unlocking the tray body from the connecting rod 300.

[0048] The flip-up tray provided in the second aspect of this embodiment and the shelf provided in the third aspect both include the mounting structure 100 provided in the first aspect. The specific structural form and functional effect of the mounting structure 100 can be obtained by referring to the optional or preferred embodiments of the first aspect.

[0049] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Similar or identical parts between embodiments can be referred to mutually. The above embodiments in this specification are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the various embodiments of this utility model.

Claims

1. A mounting structure for reversibly mounting a fitting (200) to a connecting rod (300), characterized by, The mounting structure (100) includes: The connector (1) has a recess (11) on one side surface. The connector (1) near the recess (11) has an assembly groove (12) that communicates with the interior of the area enclosed by the recess (11). The connector (1) also has an accessory mounting part (13) for fixing the connector (1) to the accessory (200). Connector 2 (2) has a U-shaped notch (21) that is three-sided through on one side. At least one of the two side walls facing each other of the U-shaped notch (21) has a window (22). The locking handle (3) has a first end in the length direction forming a cam end (301) with an outer contour in the shape of a cam, and a curved surface (3001) on one side in the length direction forming a concave surface to the other side. In the assembled state, the parts corresponding to the opposite side walls of the second connector (2) and its U-shaped notch (21) are detachably fixed to the parts of the first connector (1) located on both sides of its recess (11) by the fastener (5), so that the U-shaped notch (21) and the recess (11) are fastened together to form a fastening space that is axially connected at both ends; the locking handle (3) passes through the window (22) provided on the corresponding side of the second connector (2) and its cam end (301) is detachably hinged to the assembly groove (12) provided on the first connector (1); the locking handle (3) can rotate relative to the second connector (2) so that its curved surface (3001) approaches or moves away from the side surface of the second connector (2) away from its U-shaped notch (21), so that the cam end (301) of the locking handle (3) is squeezed toward the inside of the fastening space or moves toward the direction of exiting the fastening space.

2. The mounting structure according to claim 1, characterized by The locking handle (3) has two parts. The first connector (1) is provided with the mounting groove (12) on both sides of the recess (11). The U-shaped notch (21) is provided with the window (22) on both sides facing each other. In the assembled state, the two locking handles (3) pass through the window (22) on the corresponding side of the second connector (2) and their respective cam ends (301) are detachably hinged to the mounting groove (12) on the corresponding side of the first connector (1).

3. The mounting structure according to claim 1, wherein The second connector (2) is a plate-like structure bent into a U-shape.

4. The mounting structure according to claim 1, wherein The fastener (5) includes bolts and nuts; In the assembled state, part of the first connector (1) is located inside the U-shaped notch (21) of the second connector (2). The shank of the bolt passes through the mounting hole in one side wall of the second connector (2) with opposite sides of its U-shaped notch (21), the mounting hole in the first connector (1), and the mounting hole in the other side wall of the second connector (2) with opposite sides of its U-shaped notch (21) and is locked by the nut.

5. The installation structure according to claim 1, characterized in that, The accessory mounting part (13) includes a mounting hole provided in the connector (1) and a locking nut coaxially fixed to one side of the mounting hole. In the assembled state, the shank of the locking bolt passes through the accessory (200), inserts into the mounting hole, and is threadedly connected to the locking bolt.

6. The mounting structure according to claim 1, wherein The second end of the locking handle (3) in the length direction is bent toward the side surface opposite to its curved surface (3001) to form a bent end (302).

7. The mounting structure according to claim 1, wherein The mounting groove (12) provided on the connector (1) has rotating shaft mounting holes (121) on the opposite side walls inside. The cam end (301) of the locking handle (3) has a through hole (3011). In the assembled state, a pin (4) is inserted inside the through hole (3011) and the two ends of the pin (4) are respectively rotatably installed in the rotating shaft mounting holes (121) on the opposite side walls inside the mounting groove (12).

8. The mounting structure according to claim 1, wherein The first side surface of the connector (1) with a recess (11) is the first side surface of the connector (1), and the assembly groove (12) is a notch groove formed at the junction of the first side surface and the other side surface adjacent to the first side surface.

9. A reversible pallet, characterized by The pallet includes a pallet body and a mounting structure as described in any one of claims 1-8, wherein at least two of the mounting structures (100) are spaced apart on one side of the pallet body, and the connector (1) of each of the mounting structures (100) is fixedly connected to the pallet body by a respective accessory mounting part (13).

10. A shelving unit, characterized in that Includes a frame and a flip-up tray as described in claim 9, the frame having a connecting rod (300), in the assembled state, the connecting rod (300) passing through the fastening space formed by the U-shaped notch (21) and the recess (11) in each of the mounting structures (100); The locking handle (3) can rotate relative to the second connector (2) so that the cam end (301) of the locking handle (3) moves toward the direction of squeezing inside the fastening space to lock the tray body to the connecting rod (300), or so that the cam end (301) of the locking handle (3) moves toward the direction of exiting the fastening space to unlock the tray body to the connecting rod (300).

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