Trolley, foldable storage device and rear plate assembly

Abstract

The utility model discloses a buggy, foldable storage device and back plate subassembly, wherein the back plate subassembly includes outer plate, inner plate, unlocking plate, latch hook and lock spring, the inner plate is overlaid in the outer plate, the inner plate and the outer plate form the plate cavity, the lock hole of the inner plate is communicated with the plate cavity, the lock hole of the inner plate is communicated with the lock hook, and the lock spring is connected with the lock hole of the inner plate. The lock hook comprises a lock body, a driven part and a hook part, the driven part extends backwards from the top of the lock body, the hook part extends forwards from the bottom of the lock body, the lock body is configured to be rotatable relative to the inner plate, the driven part extends to the plate cavity through the lock hole of the inner plate, and the hook part extends to the plate cavity through the lock hole of the inner plate. The driven part is connected to the unlocking plate in a drivable mode, and the lock spring is arranged between the inner plate and the hook part and used for pushing the hook part to move in the direction away from the inner plate.

Description

Technical Field

[0001] This utility model relates to a trolley, and more particularly to a trolley, a foldable storage device, and a rear panel assembly. Background Technology

[0002] In Chinese utility model patent CN214777508U, the inventor discloses a folding storage box, which includes a box body with an opening at the top. The box body includes a first fixed box panel, a first folding side box panel, a second folding side box panel, a second fixed box panel, and a bottom box panel. One side of the first folding side box panel is hinged to a first side of the first fixed box panel, and the other side of the first folding side box panel is hinged to a first side of the second fixed box panel. One side of the second folding side box panel is hinged to a second side of the first fixed box panel, and the other side of the second folding side box panel is hinged to a second side of the second fixed box panel. The first and second folding side box panels fold towards each other, and the folded first and second folding side box panels, together with the first fixed box panel, form a first receiving space for accommodating the box lid, ensuring that the lid will not fall off during the movement of the storage box. In the prior art, the lid has a single function, serving only as a cover. The inventor of this utility model is committed to solving the technical problem of making the lid of the box more functional, so that the folding storage box is more functional and less expensive. Utility Model Content

[0003] One objective of this utility model is to provide a trolley, a foldable storage device, and a rear panel assembly, wherein the unlocking plate of the rear panel assembly can unlock the rear panel assembly and the front panel assembly, and after the foldable storage device is in the unfolded state to form a storage cavity, the unlocking plate can cover the opening of the storage cavity.

[0004] One objective of this invention is to provide a trolley, a foldable storage device, and a rear panel assembly, wherein an unlocking plate is movably disposed in a cavity formed between an outer panel and an inner panel of the rear panel assembly. When the foldable storage device is in a folded state, the unlocking plate is located in the cavity of the rear panel assembly to prevent the unlocking plate from being lost. When the unlocking plate moves upward, the unlocking plate can unlock the rear panel assembly and the front panel assembly, allowing the foldable storage device to switch from a folded state to an unfolded state.

[0005] One objective of this utility model is to provide a trolley, a foldable storage device, and a rear panel assembly, wherein when the locking unit of the rear panel assembly locks the unlocking plate, the unlocking plate and the bottom edge of the outer panel cooperate with each other, causing the leaf spring of the leaf spring unit of the rear panel assembly to be in a compressed state. When the locking unit releases the unlocking plate, the leaf spring pushes the unlocking plate upward during the extension process, thereby unlocking the rear panel assembly and the front panel assembly.

[0006] One objective of this invention is to provide a trolley, a foldable storage device, and a rear panel assembly, wherein when the unlocking plate moves up and down within the cavity of the rear panel assembly, the foldable storage device can prevent the surface of the unlocking plate from being scratched.

[0007] According to one aspect of the present invention, a rear panel assembly is provided, comprising:

[0008] One outer panel;

[0009] An inner panel, wherein the inner panel has at least one locking hole, wherein the inner panel is stacked on the outer panel, and a cavity is formed between the inner panel and the outer panel, wherein the locking hole of the inner panel communicates with the cavity.

[0010] An unlocking plate, wherein the unlocking plate is movably disposed within the plate cavity;

[0011] At least one locking hook, wherein the locking hook includes a lock body, a driven portion, and a hook portion, the driven portion extending rearward from the top of the lock body, the hook portion extending forward from the bottom of the lock body, wherein the lock body is configured to be rotatable relative to the inner plate, the driven portion extending through the lock hole in the inner plate to the plate cavity, and the driven portion being drivably connected to the unlocking plate; and

[0012] At least one locking spring, wherein the locking spring is disposed between the inner plate and the hook portion for pushing the hook portion to move away from the inner plate.

[0013] According to one embodiment of the present invention, a cavity opening is formed between the inner plate and the outer plate, the cavity opening is connected to the cavity, and the unlocking plate can be moved out or into the cavity through the cavity opening.

[0014] According to one embodiment of the present invention, the inner plate has a lock hole in the middle of each of its opposite sides, and the rear plate assembly includes two lock hooks and two lock springs. The driven portion of one lock hook extends through one of the lock holes in the inner plate to the plate cavity and is drivably connected to one side of the unlocking plate. The driven portion of the other lock hook extends through another lock hole in the inner plate to the plate cavity and is drivably connected to the other side of the unlocking plate. A lock spring is provided between the hook portion of each lock hook and each side of the inner plate.

[0015] According to one embodiment of the present invention, each of the lock hooks has a driven inclined surface at the end of the driven portion, and each side of the unlocking plate has a driving portion in the middle, the driving portion having a driving inclined surface, wherein the driving inclined surface of the driving portion is located below the driven inclined surface of the driven portion, and the driving inclined surface of the driving portion and the driven inclined surface of the driven portion are in contact with each other or face each other. When the unlocking plate moves upward, the driving inclined surface of the driving portion and the driven inclined surface of the driven portion cooperate to drive the lock body to rotate relative to the inner plate.

[0016] According to one embodiment of the present invention, the lock body of the lock hook is rotatably mounted on the inner plate, such that the lock body is configured to be rotatable relative to the inner plate.

[0017] According to one embodiment of the present invention, the lock body of the lock hook is rotatably mounted on the inner plate and the outer plate, such that the lock body is configured to be rotatable relative to the inner plate.

[0018] According to one embodiment of the present invention, the locking spring is a compression spring, with one end of the locking spring abutting against the inner plate and the other end abutting against the hook portion of the locking hook.

[0019] According to one embodiment of the present invention, the inner plate has at least one plate receiving hole, the hook portion of the lock hook has a lock hook protrusion, the lock hook protrusion of the lock hook is inserted into one end of the lock spring, and the other end of the lock spring is received in the plate receiving hole of the inner plate.

[0020] According to one embodiment of the present invention, the rear plate assembly includes at least one leaf spring unit and a locking unit, wherein the leaf spring unit includes a leaf spring, one end of which abuts against the bottom edge of the outer plate, and the other end of which can abut against the bottom of the unlocking plate, wherein the locking unit is operably disposed on the outer plate, and the locking unit can lock or release the unlocking plate. When the locking unit locks the unlocking plate, the bottom of the unlocking plate and the bottom edge of the outer plate cause the leaf spring to be in a compressed state.

[0021] According to one embodiment of the present invention, the leaf spring unit includes a protective portion, the protective portion including a fixed seat and a movable seat, wherein the fixed seat is fixedly mounted on the outer plate, the fixed seat has a body channel and at least one limiting groove communicating with the body channel, the limiting groove extending from the bottom to the top of the fixed seat, wherein the movable seat has a body receiving hole and at least one limiting arm, the body receiving hole extending from the bottom to the top of the movable seat, the limiting arm extending laterally from the bottom of the movable seat, wherein the movable seat is movably disposed vertically in the body channel of the fixed seat such that the limiting arm protrudes into the limiting groove, the bottom of the leaf spring directly abuts against the bottom edge of the outer plate, the top of the leaf spring is received in the body receiving hole of the movable seat, and the top of the movable seat can abut against the bottom of the unlocking plate, so that the top of the leaf spring abuts against the bottom of the unlocking plate through the movable seat.

[0022] According to one embodiment of the present invention, the leaf spring unit includes a protective part, the protective part includes a fixing seat, the fixing seat is fixedly installed on the outer plate, and the fixing seat has a groove and two protruding ribs, the two protruding ribs respectively protruding into the groove on opposite sides of the groove, the bottom of the leaf spring abuts against the fixing seat by sinking into the groove of the fixing seat, and the two protruding ribs respectively protruding into the gap at the bottom of the leaf spring so that the bottom of the leaf spring abuts against the bottom edge of the outer plate through the fixing seat, wherein the bottom of the unlocking plate has at least one plate protrusion, the plate protrusion being able to be inserted into the top of the leaf spring.

[0023] According to one embodiment of the present invention, the bottom of the unlocking plate has a locking groove, wherein the locking unit includes a locking part and a reset part. The locking part has a locking end, and the locking part is operably mounted on the bottom of the outer plate. The reset part is disposed between the locking part and the outer plate. The locking end of the locking part can extend into or out of the locking groove of the unlocking plate. When the locking end of the locking part extends into the locking groove of the unlocking plate, the locking unit locks the unlocking plate. When the locking end of the locking part exits the locking groove of the unlocking plate, the locking unit releases the unlocking plate.

[0024] According to one embodiment of the present invention, the bottom of the outer plate has an outer plate notch, and the locking part is rotatably mounted on the outer plate and located at the outer plate notch.

[0025] According to one embodiment of the present invention, the reset part is a compression spring or a torsion spring.

[0026] According to one embodiment of the present invention, the top of the outer plate has a locking channel, wherein the locking unit includes a locking part, a reset part, a first magnetic attraction part, and a second magnetic attraction part. The locking part has a locking inner end and a locking outer end, the locking inner end of the locking part extends through the locking channel of the outer plate to the plate cavity, the reset part is fitted onto the locking part, and the opposite ends of the reset part abut against the outer plate and the locking outer end of the locking part, respectively. The first magnetic attraction part is installed on the locking inner end of the locking part, and the size of the first magnetic attraction part is larger than the opening size of the locking channel of the outer plate. The second magnetic attraction part is disposed on the top of the unlocking plate. The first magnetic attraction part and the second magnetic attraction part can attract each other. When the first magnetic attraction part and the second magnetic attraction part attract each other, the locking unit locks the unlocking plate and the reset part is in a compressed state. When the first magnetic attraction part and the second magnetic attraction part disengage, the locking unit releases the unlocking plate and the reset part is in an extended state.

[0027] According to one embodiment of the present invention, the top of the unlocking plate has a hole that extends through opposite sides of the unlocking plate. The second magnetic part is disposed on the side of the unlocking plate away from the outer plate, and at least a portion of the second magnetic part is exposed in the hole of the unlocking plate. The first magnetic part is capable of extending into or out of the hole of the unlocking plate. When the first magnetic part extends into the hole of the unlocking plate, the first magnetic part and the second magnetic part are attracted to each other. When the first magnetic part exits the hole of the unlocking plate, the first magnetic part and the second magnetic part disengage from each other.

[0028] According to one embodiment of the present invention, the stroke of the first magnetic attraction part is greater than the distance between the surface of the second magnetic attraction part exposed to the hole of the unlocking plate and the surface of the unlocking plate facing the outer plate.

[0029] According to one embodiment of the present invention, the first magnetic attraction part is made of a magnetizable metal material, and the second magnetic attraction part is a magnet.

[0030] According to one embodiment of the present invention, the top of the outer plate has an operating channel, wherein the locking unit includes a blocking part, the blocking part is disposed on the top of the unlocking plate in such a way that the position of the blocking part corresponds to the operating channel of the outer plate, the blocking part can be blocked or released by the top edge of the outer plate, when the blocking part is blocked by the top edge of the outer plate, the locking unit locks the unlocking plate and the position of the blocking part corresponds to the position of the operating channel of the outer plate, when the blocking part is released by the top edge of the outer plate, the locking unit releases the unlocking plate.

[0031] According to another aspect of the present invention, the present invention further provides a foldable storage device, which includes:

[0032] A front panel assembly, wherein the front panel assembly has at least one locking lug;

[0033] Two side panel assemblies, wherein the middle portion of the side panel assembly is foldable inward; and

[0034] A rear panel assembly, wherein the rear panel assembly includes an outer panel, an inner panel, an unlocking plate, at least one locking hook, and at least one locking spring, wherein the inner panel has at least one locking hole, wherein the inner panel is stacked on the outer panel, and a cavity is formed between the inner panel and the outer panel, the locking hole of the inner panel communicating with the cavity, wherein the unlocking plate is movably disposed in the cavity, wherein the locking hook includes a lock body, a driven portion, and a hook portion, the driven portion extending rearward from the top of the lock body, and the hook portion extending forward from the bottom of the lock body, wherein the lock body is configured relative to the inner panel. The drive portion is rotatable, extending through the lock hole of the inner plate to the plate cavity, and the drive portion is drivably connected to the unlocking plate. The locking spring is disposed between the inner plate and the hook portion for pushing the hook portion to move away from the inner plate. The rear plate assembly and the front plate assembly are arranged face to face. The opposite sides of one side plate assembly are rotatably mounted to one side of the front plate assembly and one side of the rear plate assembly, respectively. The opposite sides of the other side plate assembly are rotatably mounted to the other side of the front plate assembly and the other side of the rear plate assembly, respectively.

[0035] The foldable storage device has a folded state and an unfolded state, and the foldable storage device can switch between the folded state and the unfolded state. When the foldable storage device is in the folded state, the side panel assembly after being folded in the middle is clamped between the front panel assembly and the rear panel assembly, and the hook of the locking hook of the rear panel assembly hooks the locking protrusion of the front panel assembly. When the foldable storage device is in the unfolded state, a storage cavity is formed between the front panel assembly, the rear panel assembly and the two side panel assemblies.

[0036] According to one embodiment of the present invention, the foldable storage device includes two base plate assemblies, the middle of the two base plate assemblies can be folded upward, one of the opposite ends of the base plate assembly is rotatably mounted to one end of the two side plate assemblies at the bottom of the side plate assembly, and the other of the opposite ends of the base plate assembly is rotatably mounted to the other end of the two side plate assemblies at the bottom of the base plate assembly.

[0037] According to one embodiment of the present invention, the base plate assembly includes a triangular base plate main plate and two triangular base plate sub-plates. The two base plate sub-plates are rotatably mounted on opposite ends of the base plate main plate, and the unfolded base plate assembly is rectangular. One base plate sub-plate is rotatably mounted on the bottom of one side plate assembly, and the other base plate sub-plate is rotatably mounted on the bottom of the other side plate assembly.

[0038] According to one embodiment of the present invention, after the base plate assembly is unfolded, the connection position between the main base plate and the secondary base plate is raised upward.

[0039] According to one embodiment of the present invention, after the base plate assembly is unfolded, there is an included angle α between the top surface of the main base plate and the top surface of the secondary base plate, and an included angle β between the bottom surface of the main base plate and the bottom surface of the secondary base plate, wherein the included angle α is greater than 180° and the included angle β is less than 180°.

[0040] According to another aspect of the present invention, the present invention further provides a trolley, which includes a pull rod, a set of wheels, and a foldable storage device, wherein the foldable storage device includes:

[0041] A front panel assembly, wherein the front panel assembly has at least one locking lug;

[0042] Two side panel assemblies, wherein the middle portion of the side panel assembly is foldable inward;

[0043] Two base plate assemblies, wherein the middle portions of the two base plate assemblies are foldable upwards; the opposite ends of one base plate assembly are rotatably mounted to one end of the two side plate assemblies at the bottom of the respective base plate assembly; and the opposite ends of the other base plate assembly are rotatably mounted to the other end of the two side plate assemblies at the bottom of the respective base plate assembly; and

[0044] A rear panel assembly, wherein the rear panel assembly includes an outer panel, an inner panel, an unlocking plate, at least one locking hook, and at least one locking spring, wherein the inner panel has at least one locking hole, wherein the inner panel is stacked on the outer panel, and a cavity is formed between the inner panel and the outer panel, the locking hole of the inner panel communicating with the cavity, wherein the unlocking plate is movably disposed in the cavity, wherein the locking hook includes a lock body, a driven portion, and a hook portion, the driven portion extending rearward from the top of the lock body, and the hook portion extending forward from the bottom of the lock body, wherein the lock body is configured relative to the inner panel. The drive portion is rotatable, extending through the lock hole of the inner plate to the plate cavity, and the drive portion is drivably connected to the unlocking plate. The locking spring is disposed between the inner plate and the hook portion for pushing the hook portion to move away from the inner plate. The rear plate assembly and the front plate assembly are arranged face to face. The opposite sides of one side plate assembly are rotatably mounted to one side of the front plate assembly and one side of the rear plate assembly, respectively. The opposite sides of the other side plate assembly are rotatably mounted to the other side of the front plate assembly and the other side of the rear plate assembly, respectively.

[0045] The foldable storage device has a folded state and an unfolded state, and the foldable storage device can switch between the folded state and the unfolded state. When the foldable storage device is in the folded state, the side panel assembly after being folded in the middle is clamped between the front panel assembly and the rear panel assembly, and the hook of the locking hook of the rear panel assembly hooks the locking protrusion of the front panel assembly. When the foldable storage device is in the unfolded state, a storage cavity is formed between the front panel assembly, the rear panel assembly and the two side panel assemblies. The pull rod is provided on the rear panel assembly, and the wheel is provided at the bottom of the rear panel assembly. Attached Figure Description

[0046] Figure 1A and Figure 1B These are perspective views of a trolley in a foldable storage device in a folded state, according to a preferred embodiment of the present invention, from different angles.

[0047] Figure 2This is a cross-sectional schematic diagram of the trolley according to the above-described preferred embodiment of the present invention when the foldable storage device is in a folded state.

[0048] Figure 3 yes Figure 2 A magnified view of a local location.

[0049] Figure 4A and Figure 4B These are perspective views of the trolley according to the above-described preferred embodiments of the present invention when the foldable storage device is in the unfolded state.

[0050] Figure 5 This is a cross-sectional schematic diagram of the trolley according to the above-described preferred embodiment of the present invention when the foldable storage device is in the unfolded state.

[0051] Figure 6 yes Figure 5 A magnified view of a local location.

[0052] Figure 7 yes Figure 5 A magnified view of another local location.

[0053] Figure 8A and Figure 8B These are exploded schematic diagrams from different angles of the trolley according to the above-described preferred embodiment of the present invention when the foldable storage device is in the unfolded state.

[0054] Figure 9 This is an exploded view of a rear panel assembly of the foldable storage device of the trolley according to the above-described preferred embodiment of the present invention.

[0055] Figure 10 yes Figure 9 A magnified view of one of the locations.

[0056] Figure 11 yes Figure 9 A magnified view of another location.

[0057] Figure 12 This is an exploded view of the rear panel assembly of the foldable storage device of the trolley according to the above-described preferred embodiment of the present invention.

[0058] Figure 13 yes Figure 12 A magnified view of one of the locations.

[0059] Figure 14 yes Figure 12 A magnified view of another location.

[0060] Figure 15This is a perspective view of the pair of base plate assemblies of the foldable storage device of the trolley according to the above-described preferred embodiment of the present invention after being unfolded.

[0061] Figure 16 This is a cross-sectional view of the base plate assembly of the foldable storage device of the trolley according to the above-described preferred embodiment of the present invention after it has been unfolded.

[0062] Figure 17A and Figure 17B These are exploded schematic diagrams from different angles showing the unfolded base plate assembly of the foldable storage device of the trolley according to the above-described preferred embodiment of the present invention.

[0063] Figures 18A to 18D These are cross-sectional schematic diagrams showing different positions of the trolley in the foldable storage device according to the above-described preferred embodiments of the present invention when it is in a folded state.

[0064] Figures 19A to 19D These are cross-sectional schematic diagrams showing different states of the trolley in the foldable storage device at different positions according to the above-described preferred embodiments of the present invention when the trolley is in a folded state.

[0065] Figure 20A and Figure 20B These are perspective views of another rear panel assembly of the foldable storage device of the trolley according to the above-described preferred embodiment of the present invention.

[0066] Figure 21 This is an exploded view of the rear panel assembly of the foldable storage device of the trolley according to the above-described preferred embodiment of the present invention.

[0067] Figure 22 yes Figure 21 A magnified view of a local location.

[0068] Figure 23 This is an exploded view of the rear panel assembly of the foldable storage device of the trolley according to the above-described preferred embodiment of the present invention.

[0069] Figure 24 yes Figure 23 A magnified view of a local location.

[0070] Figure 25 yes Figure 23 A magnified view of another local location.

[0071] Figure 26 yes Figure 23 Another magnified view of a local location.

[0072] Figure 27 This is a cross-sectional schematic diagram of the rear panel assembly of the foldable storage device of the trolley according to the above-described preferred embodiment of the present invention.

[0073] Figures 28A to 28C They are Figure 27 A magnified view of different states at a local location.

[0074] Figure 29A and Figure 29B These are cross-sectional schematic diagrams showing different positions of the rear panel assembly of the foldable storage device of the trolley according to the above-described preferred embodiment of the present invention. Detailed Implementation

[0075] Before describing any embodiment of this invention in detail, it should be understood that the invention is not limited in its application to the details of the construction and arrangement of the components set forth in the following description or illustrated in the following figures. The invention is capable of other embodiments and can be practiced or carried out in various ways. Furthermore, it should be understood that the wording and terminology used herein are for descriptive purposes and should not be considered limiting. The use of “comprising” or “having” and variations thereof herein is intended to cover the items set forth below and their equivalents, as well as any additional items. Unless otherwise specified or limited, the terms “installation,” “connection,” “support,” and “linkage,” and variations thereof are used broadly and cover both direct and indirect installation, connection, support, and linking. Moreover, “connection” and “linkage” are not limited to physical or mechanical connections or links.

[0076] Furthermore, firstly, in the disclosure of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. 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, the above terms should not be construed as a limitation on this utility model. Secondly, the term "a" should be understood as "at least one" or "one or more," that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple. The term "a" should not be construed as a limitation on the quantity.

[0077] Referring to Figures 1 to 12 of the accompanying drawings in the specification of this utility model Figure 19D A preferred embodiment of the present invention will be disclosed and described in the following description, wherein the trolley includes a foldable storage device 10, a pull rod 20 and a set of wheels 30.

[0078] The foldable storage device 10 includes a rear panel assembly 11, a front panel assembly 12, two side panel assemblies 13, and two bottom panel assemblies 14. The rear panel assembly 11 and the front panel assembly 12 are arranged facing each other. The middle portion of each side panel assembly 13 can be folded inward. The opposite sides of one side panel assembly 13 are rotatably mounted to one side of the rear panel assembly 11 and one side of the front panel assembly 12, respectively. The opposite sides of the other side panel assembly 13 are rotatably mounted to the other side of the rear panel assembly 11 and the other side of the front panel assembly 12, respectively. The middle portion of each bottom panel assembly 14 can be folded upward. The opposite ends of one bottom panel assembly 14 are rotatably mounted to one end of the two side panel assemblies 13 at the bottom of the side panel assembly 13, respectively. The opposite ends of the other bottom panel assembly 14 are rotatably mounted to the other end of the two side panel assemblies 13 at the bottom of the side panel assembly 13, respectively.

[0079] After the two side panel assemblies 13 and the two bottom panel assemblies 14 are folded upwards at their midpoints, the rear panel assembly 11 and the front panel assembly 12 are stacked on top of each other, and the folded side panel assemblies 13 and folded bottom panel assemblies 14 are sandwiched between the rear panel assembly 11 and the front panel assembly 12. At this time, the foldable storage device 10 is in a folded state. After the two side panel assemblies 13 and the two bottom panel assemblies 14 are unfolded, the foldable storage device 10 forms a storage cavity 15 between the rear panel assembly 11, the front panel assembly 12, the two side panel assemblies 13, and the two bottom panel assemblies 14. At this time, the foldable storage device 10 is in an unfolded state.

[0080] In other words, the foldable storage device 10 has an unfolded state and a folded state, and the foldable storage device 10 can switch between the unfolded state and the folded state. When the foldable storage device 10 is in the unfolded state, the foldable storage device 10 forms the storage cavity 15. When the foldable storage device 10 is in the folded state, the foldable storage device 10 has a smaller size.

[0081] In this specific example of the trolley of this utility model, the side panel assembly 13 and the bottom panel assembly 14 are linked. That is, when the side panel assembly 13 is unfolded, it drives the bottom panel assembly 14 to unfold synchronously; when the side panel assembly 13 is folded, it drives the bottom panel assembly 14 to fold synchronously. In this way, the user only needs to operate the side panel assembly 13 to switch the state of the foldable storage device 10, without having to specifically operate the bottom panel assembly 14. The connection method of the side panel assembly 13 and the bottom panel assembly 14 will be disclosed later.

[0082] like Figure 1A , Figure 1B , Figure 4A and Figure 4B As shown, the pull rod 20 is disposed on the rear plate assembly 11, and the wheels 30 are respectively disposed on the bottom of the rear plate assembly 11 and the bottom of the front plate assembly 12. Optionally, in other examples of the trolley of this utility model, the trolley may only have the wheels 30 disposed on the bottom of the rear plate assembly 11, that is, the bottom of the front plate assembly 12 may not have the wheels 30 disposed thereon.

[0083] In this specific example of the trolley of the present invention, the rear panel assembly 11 is capable of locking and releasing the front panel assembly 12. When the rear panel assembly 11 locks the front panel assembly 12, the foldable storage device 10 can be reliably held in the folded state. When the rear panel assembly 11 releases the front panel assembly 12, the foldable storage device 10 can switch from the folded state to the unfolded state.

[0084] Specifically, the rear panel assembly 11 includes an outer panel 111, an inner panel 112, an unlocking plate 113, at least one locking hook 114 and at least one locking spring 115, and the rear panel assembly 11 has a plate cavity 116.

[0085] The inner panel 112 is stacked on top of the outer panel 111, and the rear panel assembly 11 forms the cavity 116 between the outer panel 111 and the inner panel 112. The inner panel 112 has at least one locking hole 1121 communicating with the cavity 116. For example, in a specific example of the trolley of this invention, the inner panel 112 and the outer panel 111 can be fixedly mounted with screws so that the inner panel 112 is reliably stacked on top of the outer panel 111, forming the cavity 116 between them.

[0086] The unlocking plate 113 is movably disposed in the cavity 116 of the rear plate assembly 11, that is, the unlocking plate 113 can move relative to the inner plate 112 within the cavity 116 of the rear plate assembly 11.

[0087] The lock hook 114 includes a lock body 1141, a driven portion 1142, and a hook portion 1143. The driven portion 1142 extends rearward from the top of the lock body 1141, and the hook portion 1143 extends forward from the bottom of the lock body 1141. The lock body 1141 is configured to be rotatable relative to the inner plate 112. The driven portion 1142 extends through the lock hole 1121 of the inner plate 112 to the plate cavity 116 of the rear plate assembly 11, and the driven portion 1142 is drivably connected to the unlocking plate 113.

[0088] The locking spring 115 is disposed between the inner plate 112 and the hook portion 1143 of the locking hook 114, for pushing the hook portion 1143 to move away from the inner plate 112.

[0089] The front panel assembly 12 has at least one locking protrusion 121, and the hook portion 1143 of the locking hook 114 can engage and release the locking protrusion 121 of the front panel assembly 12.

[0090] When the foldable storage device 10 is in the folded state, the hook portion 1143 of the locking hook 114 hooks the locking protrusion 121 of the front panel assembly 12. When the unlocking plate 113 moves upward and drives the lock body 1141 of the locking hook 114 to rotate relative to the inner panel 112, the hook portion 1143 of the locking hook 114 releases the locking protrusion 121 of the front panel assembly 12, allowing the foldable storage device 10 to switch from the folded state to the unfolded state. In other words, the unlocking plate 113 can unlock the rear panel assembly 11 and the front panel assembly 12, allowing the foldable storage device 10 to switch from the folded state to the unfolded state. After the foldable storage device 10 switches to the unfolded state, it forms the storage cavity 15.

[0091] Preferably, the unlocking plate 113 can be moved out of or into the cavity 116 of the rear panel assembly 11. When the unlocking plate 113 is moved out of the cavity 116 of the rear panel assembly 11, it can cover the opening of the storage cavity 15, allowing it to function as a lid. It is understood that when the unlocking plate 113 is used as a lid, the inner plate 112, the front panel assembly 12, and the two side panel assemblies 13 of the rear panel assembly 11 can support the four edges of the unlocking plate 113. In this case, the inner plate 112 can also prevent items stored in the storage cavity 15 of the foldable storage device 10 from entering the cavity 116 of the rear panel assembly 11. When the unlocking plate 113 is moved into the cavity 116 of the rear panel assembly 11, the foldable storage device 10 can prevent the unlocking plate 113 from being lost.

[0092] Specifically, the rear panel assembly 11 further forms a cavity opening 117 between the outer panel 111 and the inner panel 112, the cavity opening 117 communicating with the cavity 116, and the unlocking plate 113 can be moved out or into the cavity 116 through the cavity opening 117. Preferably, the cavity opening 117 of the rear panel assembly 11 communicates with the top of the cavity 116.

[0093] In Figure 1 to Figure 19DIn this specific example of the trolley of the present invention, the inner plate 112 has a locking hole 1121 on each of its opposite sides. The rear plate assembly 11 includes two locking hooks 114 and two locking springs 115. The driven portion 1142 of one locking hook 114 extends through one locking hole 1121 of the inner plate 112 to the plate cavity 116 and is drivably connected to one side of the unlocking plate 113. The driven portion 1142 of the other locking hook 114 extends through the other locking hole 1121 of the inner plate 112 to the plate cavity 116 and is drivably connected to the other side of the unlocking plate 113. A locking spring 115 is provided between the hook portion 1143 of each locking hook 114 and each side of the inner plate 112. Correspondingly, the front plate assembly 12 has a locking protrusion 121 on each of its opposite sides. After the rear panel assembly 11 and the front panel assembly 12 are stacked, the hook portions 1143 of the two locking hooks 114 respectively hook the two locking protrusions 121 of the front panel assembly 12, so that the foldable storage device 10 can be reliably held in the folded state. When the unlocking plate 113 moves upward within the cavity 116 of the rear panel assembly 11, the unlocking plate 113 can simultaneously drive the lock bodies 1141 of the two locking hooks 114 to rotate relative to the inner panel 112, so that the hook portions 1143 of the two locking hooks 114 simultaneously release the two locking protrusions 121 of the front panel assembly 12. This simplifies the operation of the foldable storage device 10 and makes its operation more convenient.

[0094] like Figure 12 , Figure 13 , Figure 18C and Figure 19CAs shown, each of the locking hooks 114 has a driven inclined surface 11421 at the end of the driven portion 1142. The unlocking plate 113 has a driving portion 1131 in the middle of opposite sides. The driving portion 1131 has a driving inclined surface 11311. The driving inclined surface 11311 of the driving portion 1131 is located below the driven inclined surface 11421 of the driven portion 1142, and the driving inclined surface 11311 of the driving portion 1131 and the driven inclined surface 11421 of the driven portion 1142 face each other. When the unlocking plate 113 moves upward within the cavity 116 of the rear plate assembly 11, the driving ramp 11311 of the driving part 1131 and the driven ramp 11421 of the driven part 1142 cooperate to drive the lock body 1141 of the locking hook 114 to rotate relative to the inner plate 112, so that the hook portion 1143 of the locking hook 114 can release the locking protrusion 121 of the front plate assembly 12. Optionally, in other examples of the trolley of this utility model, the driving ramp 11311 of the driving part 1131 and the driven ramp 11421 of the driven part 1142 can be in surface contact.

[0095] like Figure 8A , Figure 9 , Figure 10 , Figure 12 and Figure 13 As shown, the lock body 1141 of the lock hook 114 is rotatably mounted on the outer plate 111 and the inner plate 112, such that the lock body 1141 is configured to be rotatable relative to the inner plate 112. Specifically, the outer plate 111 has an outer plate pivot hole 1111, and the inner plate 112 has an inner plate pivot hole 1122. The inner plate pivot hole 1122 of the inner plate 112 and the outer plate pivot hole 1111 of the outer plate 111 are adjacent and correspond to each other in the horizontal direction. The lock body 1141 has a pivot shaft 11411 on each of its opposite sides. One pivot shaft 11411 of the lock body 1141 extends to the outer plate pivot hole 1111 of the outer plate 111, and the other pivot shaft 11411 of the lock body 1141 extends to the inner plate pivot hole 1122 of the inner plate 112. Thus, the lock body 1141 is rotatably mounted on the outer plate 111 and the inner plate 112, such that the lock body 1141 is configured to be rotatable relative to the inner plate 112.

[0096] like Figure 9 , Figure 10 , Figure 12 and Figure 13As shown, the locking spring 115 is a compression spring, wherein one end of the locking spring 115 abuts against the inner plate 112, and the other end abuts against the hook portion 1143 of the locking hook 114. When the unlocking plate 113 moves upward within the cavity 116 of the rear plate assembly 11, driving the lock body 1141 of the locking hook 114 to rotate relative to the inner plate 112, the hook portion 1143 moves toward the inner plate 112, compressing the locking spring 115. This causes the locking spring 115 to accumulate elastic potential energy due to deformation, so that the locking spring 115 can push the hook portion 1143 to extend away from the inner plate 112 during the process of returning to its initial state. Optionally, in other examples of the trolley of this utility model, the locking spring 115 may be a torsion spring.

[0097] Preferably, the inner plate 112 has at least one plate receiving hole 1123, and the hook portion 1143 of the locking hook 114 has a locking hook protrusion 11431. The locking hook protrusion 11431 of the locking hook 114 is inserted into one end of the locking spring 115, and the other end of the locking spring 115 is received in the plate receiving hole 1123 of the inner plate 112. In this way, the locking spring 115 can be reliably held between the locking hook 1143 and the inner plate 112, preventing the locking spring 115 from falling out between the locking hook 1143 and the inner plate 112 and ensuring the reliability of the trolley.

[0098] like Figure 9 , Figure 11 , Figure 12 and Figure 14 As shown, the rear plate assembly 11 further includes at least one leaf spring unit 118 and a locking unit 119. The leaf spring unit 118 includes a leaf spring 1181, one end of which abuts against the bottom edge 1112 of the outer plate 111, and the other end of which abuts against the bottom of the unlocking plate 113. The locking unit 119 is operably disposed on the outer plate 111 and is capable of locking or releasing the unlocking plate 113 when the... When the locking unit 119 locks the unlocking plate 113, the bottom of the unlocking plate 113 and the bottom edge 1112 of the outer plate 111 cause the leaf spring 1181 to be in a compressed state. When the locking unit 119 releases the unlocking plate 113, the leaf spring 1181 pushes the unlocking plate 113 upward within the cavity 116 of the rear plate assembly 11 during the extension process, so as to allow the unlocking plate 113 to unlock the rear plate assembly 11 and the front plate assembly 12.

[0099] like Figure 11 and Figure 14As shown, the leaf spring unit 118 includes a protective portion 1182, which includes a fixed seat 11821 and a movable seat 11822. The fixed seat 11821 is fixedly mounted to the outer plate 111, for example, the fixed seat 11821 can be fixedly mounted to the outer plate 111 by screws. The fixed seat 11821 has a body channel 118211 and at least one limiting groove 118212 communicating with the body channel 118211, the limiting groove 118212 extending from the bottom to the top of the fixed seat 11821. The movable seat 11822 has a body receiving hole 118221 and at least one limiting arm 118222, the body receiving hole 118221 extending from the bottom to the top of the movable seat 11822, and the limiting arm 118222 extending laterally from the bottom of the movable seat 11822. The movable seat 11822 is movably disposed in the seat channel 118211 of the fixed seat 11821 by means of the limiting arm 118222 protruding into the limiting groove 118212. The bottom of the leaf spring 1181 directly abuts against the bottom edge 1112 of the outer plate 111, and the top of the leaf spring 1181 is received in the seat receiving hole 118221 of the movable seat 11822. The top of the movable seat 11822 can abut against the bottom of the unlocking plate 113, so that the top of the leaf spring 1181 abuts against the bottom of the unlocking plate 113 through the movable seat 11822. In this way, on the one hand, the leaf spring 1181 can be reliably disposed between the bottom edge 1112 of the outer plate 111 and the bottom of the unlocking plate 113, so that the bottom of the unlocking plate 113 and the bottom edge 1112 of the outer plate 111 can compress the leaf spring 1181 to put it in a compressed state. On the other hand, the leaf spring 1181 is hidden to prevent the leaf spring 1181 from failing due to foreign objects entering the gap of the leaf spring 1181.

[0100] In this specific example of the trolley of the present invention, the fixed seat 11821 has two limiting grooves 118212, and correspondingly, the movable seat 11822 has two limiting arms 118222, the two limiting arms 118222 of the movable seat 11822 protruding into the two limiting grooves 118212 of the fixed seat 11821 respectively.

[0101] like Figure 9 , Figure 11 and Figure 12As shown, the bottom of the unlocking plate 113 has a locking groove 1132. The locking unit 119 includes a locking part 1191 and a reset part 1192. The locking part 1191 has a locking end 11911. The locking part 1191 is operably mounted on the bottom of the outer plate 111. The reset part 1192 is disposed between the locking part 1191 and the outer plate 111. The locking end 11911 of the locking part 1191 can extend into or out of the locking groove 1132 of the unlocking plate 113. When the locking end 11911 of the locking part 1191 extends into the locking groove 1132 of the unlocking plate 113, the locking unit 119 locks the unlocking plate 113. At this time, the bottom of the unlocking plate 113 and the bottom edge 1112 of the outer plate 111 cause the leaf spring 1181 to be in a compressed state. When the locking end 11911 of the locking part 1191 exits the locking groove 1132 of the unlocking plate 113, the locking unit 119 releases the unlocking plate 113. At this time, the leaf spring 1181 pushes the unlocking plate 113 upward within the plate cavity 116 of the rear plate assembly 11 during the extension process, so as to allow the unlocking plate 113 to unlock the rear plate assembly 11 and the front plate assembly 12.

[0102] For example, in this specific example of the trolley of the present invention, the locking part 1191 is rotatably mounted on the outer plate 111, and by rotating the locking part 1191, the locking end 11911 of the locking part 1191 can extend into or exit the locking groove 1132 of the unlocking plate 113. Specifically, when the locking part 1191 is not under force, the reset part 1192 can keep the locking end 11911 of the locking part 1191 in the position of extending into the locking groove 1132 of the unlocking plate 113. At this time, the rear plate assembly 11 locks the front plate assembly 12. When the locking part 1191 is under force and rotates, on the one hand, the locking part 1191 and the outer plate 111 deform the reset part 1192 to accumulate elastic potential energy. On the other hand, the locking end 11911 of the locking part 1191 exits the locking groove 1132 of the unlocking plate 113. At this time, the rear plate assembly 11 releases the front plate assembly 12. Understandably, after the external force applied to the locking part 1191 is removed, the reset part 1192 pushes the locking part 1191 to rotate during the process of restoring the initial state, so that the locking part 1191 is reset and allows the locking end 11911 of the locking part 1191 to extend into the locking groove 1132 of the unlocking plate 113.

[0103] Preferably, the bottom of the outer panel 111 has an outer panel notch 1113, and the locking part 1191 is located in the outer panel notch 1113 of the outer panel 111. In this way, the foldable storage device 10 can prevent the locking part 1191 from protruding from the outer panel 111, and when the foldable storage device 10 is in the folded state, the locking part 1191 is prevented from being accidentally operated.

[0104] Preferably, refer to the appendix Figure 18A The locking part 1191 has a force-receiving end 11912 that extends downward. A user can apply force to the locking part 1191 through the force-receiving end 11912, causing the locking part 1191 to rotate relative to the outer panel 111. For example, a user can hook their foot onto the force-receiving end 11912 of the locking part 1191 to rotate the locking part 1191 relative to the outer panel 111.

[0105] It is worth mentioning that the specific type of the reset part 1192 is not limited in this specific example of the trolley of this utility model. For example, in Figures 1 to 2019... Figure 19D In this specific example of the trolley of the present invention shown, the reset part 1192 may be a compression spring, the locking part 1191 has a component receiving hole 11913, and the bottom of the reset part 1192 is located in the component receiving hole 11913 of the locking part 1191, so that the reset part 1192 can be reliably held between the locking part 1191 and the outer plate 111. Optionally, in other specific examples of the trolley of the present invention, the reset part 1192 may also be a torsion spring.

[0106] Reference Appendix Figure 4A , Figure 4B , Figure 8A and Figure 8B The side panel assembly 13 includes a first side panel 131 and a second side panel 132. One side of the first side panel 131 and one side of the second side panel 132 are rotatably mounted, such that the middle part of the side panel assembly 13 is foldable. The side of the first side panel 131 facing away from the second side panel 132 is rotatably mounted to one side of the outer panel 111 of the rear panel assembly 11. The side of the second side panel 132 facing away from the first side panel 131 is rotatably mounted to one side of the front panel assembly 12. Thus, the opposite sides of the side panel assembly 13 are respectively rotatably mounted to one side of the outer panel 111 of the rear panel assembly 11 and one side of the front panel assembly 12.

[0107] Reference Appendix Figure 4B , Figure 8A , Figure 8B , Figures 15 to 17BThe base plate assembly 14 includes a triangular base plate main plate 141 and two triangular base plate sub-plates 142. The two base plate sub-plates 142 are rotatably mounted on opposite ends of the base plate main plate 141, so that the middle part of the base plate assembly 14 can be folded and the unfolded base plate assembly 14 is rectangular. One of the two base plate sub-plates 142 is rotatably mounted on the bottom of the side plate assembly 13, and the other is rotatably mounted on the bottom of another side plate assembly 13. Specifically, one of the two base plate sub-plates 142 of one base plate assembly 14 is rotatably mounted to the first side plate 131 of one side plate assembly 13, and the other is rotatably mounted to the first side plate 131 of another side plate assembly 13; one of the two base plate sub-plates 142 of another base plate assembly 14 is rotatably mounted to the second side plate 132 of one side plate assembly 13, and the other is rotatably mounted to the second side plate 132 of another side plate assembly 13.

[0108] Preferably, after the base plate assembly 14 is unfolded, the connection position between the main base plate 141 and the secondary base plate 142 is raised upwards. In this way, when the side plate assembly 13 is folded inwards, the side plate assembly 13 can drive the base plate assembly 14 to fold upwards synchronously and smoothly. When the side plate assembly 13 is unfolded outwards, the side plate assembly 13 can drive the base plate assembly 14 to unfold downwards synchronously and smoothly. That is, the base plate assembly 14 and the side plate assembly 13 are linked. The user only needs to operate the side plate assembly 13 to switch the state of the foldable storage device 10, without having to specifically operate the base plate assembly 14.

[0109] In other words, after the base plate assembly 14 is unfolded, there is an included angle α between the top surface of the main base plate 141 and the top surface of the secondary base plate 142, and an included angle β between the bottom surface of the main base plate 141 and the bottom surface of the secondary base plate 142. The included angle α is greater than 180° and the included angle β is less than 180°. Thus, when the side plate assembly 13 is folded inward, the side plate assembly 13 can drive the base plate assembly 14 to fold upward synchronously and smoothly. When the side plate assembly 13 is unfolded outward, the side plate assembly 13 can drive the base plate assembly 14 to unfold downward synchronously and smoothly.

[0110] Preferably, when the foldable storage device 10 is in the unfolded state, the main bottom plate 141 of one bottom plate assembly 14 is rested against the bottom of the outer plate 111 of the rear plate assembly 11, and the main bottom plate 141 of another bottom plate assembly 14 is rested against the bottom of the front plate assembly 12. The main bottom plate 141s of the two bottom plate assemblies 14 rest against each other, and the secondary bottom plates 142 of the two bottom plate assemblies 14 rest against each other, so as to improve the load-bearing capacity of the bottom plate assembly 14.

[0111] Preferably, refer to the appendix Figure 7 One of the base plate assemblies 14 has a base plate main plate 141 with a latching arm 1411 and a latching buckle 1412 disposed on the latching arm 1411. The other base plate assembly 14 has a base plate main plate 141 with a latching groove 1413 and a latching hole 1414 communicating with the latching groove 1413. When the foldable storage device 10 is in the unfolded state, the latching arm 1411 of one base plate main plate 141 is located in the latching groove 1413 of the other base plate main plate 141, and the latching buckle 1412 disposed on the latching arm 1411 extends into the latching hole 1414 communicating with the latching groove 1413. In this way, the base plate main plates 141 of the two base plate assemblies 14 can reliably latch onto each other to improve the load-bearing capacity of the base plate assembly 14.

[0112] Reference Appendix Figures 18A to 18D When the foldable storage device 10 is in the folded state, the unlocking plate 113 is located in the cavity 116 of the rear plate assembly 11 to prevent the unlocking plate 113 from being lost. The reset part 1192 of the locking unit 119 keeps the locking end 11911 of the locking part 1191 in the position of extending into the locking groove 1132 of the unlocking plate 113, so that the locking unit 119 locks the unlocking plate 113. The bottom of the unlocking plate 113 and the bottom edge 1112 of the outer plate 111 cooperate with each other to keep the leaf spring 1181 of the leaf spring unit 118 in a compressed state. The locking spring 115 keeps the hook part 1143 of the locking hook 114 in the position of hooking the locking protrusion 121 of the front plate assembly 12, so that the rear plate assembly 11 locks the front plate assembly 12.

[0113] Reference Appendix Figures 19A to 19DAfter the locking part 1191 of the locking unit 119 is rotated and the locking end 11911 is disengaged from the locking groove 1132 of the unlocking plate 113, the leaf spring 1181 of the leaf spring unit 118 pushes the unlocking plate 113 upward in the plate cavity 116 of the rear plate assembly 11 during the extension process. During the upward movement, the unlocking plate 113 applies force to the driven part 1142 of the lock hook 114 through the driving part 1131, so that the lock body 1141 driving the lock hook 114 rotates relative to the inner plate 112. During the rotation, the lock body 1141 allows the hook part 1143 to disengage from the locking protrusion 121 of the front plate assembly 12 and causes the lock spring 115 to deform and accumulate elastic potential energy. At this time, the rear plate assembly 11 releases the front plate assembly 12. When the user pulls the front panel assembly 12 away from the rear panel assembly 11, the middle of the side panel assembly 13 unfolds outward, and the side panel assembly 13 drives the bottom panel assembly 14 to unfold downward in a synchronized and smooth manner, forming the storage cavity 15 between the rear panel assembly 11, the front panel assembly 12, the two side panel assemblies 13, and the two bottom panel assemblies 14. Subsequently, the user can remove the unlocking plate 113 from the cavity 116 of the rear panel assembly 11 and use the unlocking plate 113 as a cover to cover the opening of the storage cavity 15 of the foldable storage device 10.

[0114] Appendix Figures 20A to 28C A modified example of the rear panel assembly 11 of the foldable storage device 10 of the trolley is shown, in conjunction with Figures 1 to 2010. Figure 19D Unlike the rear panel assembly 11 of the foldable storage device 10 of the trolley shown, the attached... Figures 20A to 28C In this specific example of the rear panel assembly 11 shown, the lock body 1141 of the lock hook 114 is rotatably mounted to the inner panel 112 such that the lock body 1141 is configured to rotatably rotate relative to the inner panel 112. Specifically, the inner panel 112 has two inner panel pivot holes 1122, and opposite ends of the pivot axis 11411 of the lock body 1141 extend into each of the inner panel pivot holes 1122 of the inner panel 112, thus the lock body 1141 is rotatably mounted to the inner panel 112.

[0115] Reference Appendix Figure 26The retaining seat 11821 of the protective part 1182 of the leaf spring unit 118 has a groove 118213 and two protruding ribs 118214. The two protruding ribs 118214 protrude into the groove 118213 on opposite sides. The bottom of the leaf spring 1181 is recessed into the groove 118213 of the retaining seat 11821 and abuts against the retaining seat 11821. The two protruding ribs 118214 protrude into the gap at the bottom of the leaf spring 1181 so that the bottom of the leaf spring 1181 passes through the groove 118213. The fixing seat 11821 abuts against the bottom edge 1112 of the outer plate 111. The bottom of the unlocking plate 113 has at least one plate protrusion 1133, which can be inserted into the top of the leaf spring 1181. In this way, the opposite ends of the leaf spring 1181 can reliably abut against the bottom edge 1112 of the outer plate 111 and the unlocking plate 113, preventing the leaf spring 1181 from disengaging from the outer plate 111 and the unlocking plate 113, and ensuring that the leaf spring 1181 can push the unlocking plate 113 upward during the extension process.

[0116] like Figures 21 to 24 , Figures 27 to 28CAs shown, the top of the outer panel 111 has a locking channel 1114, and the locking unit 119 includes the locking part 1191, the reset part 1192, a first magnetic attraction part 1193, and a second magnetic attraction part 1194. The locking part 1191 has an opposing locking inner end 11914 and a locking outer end 11915, and the locking inner end 11914 of the locking part 1191 extends through the locking channel 1114 of the outer panel 111 to the plate cavity 116 of the rear panel assembly 11. The reset part 1192 is fitted onto the locking part 1191, and the opposite ends of the reset part 1192 abut against the outer panel 111 and the locking outer end 11915 of the locking part 1191, respectively. The first magnetic suction part 1193 is installed on the locking inner end 11914 of the locking part 1191, and the size of the first magnetic suction part 1193 is larger than the opening size of the locking channel 1114 of the outer plate 111, so that the locking unit 119 is reliably installed on the outer plate 111, preventing the locking unit 119 from falling off the outer plate 111. The second magnetic suction part 1194 is disposed on the top of the unlocking plate 113. The first magnetic suction part 1193 and the second magnetic suction part 1194 can attract each other. When the first magnetic suction part 1193 and the second magnetic suction part 1194 attract each other, the locking unit 119 locks the unlocking plate 113 and the reset part 1192 is in a compressed state. When the first magnetic suction part 1193 and the second magnetic suction part 1194 disengage, the locking unit 119 releases the unlocking plate 113 and the reset part 1192 is in an extended state.

[0117] Preferably, the outer plate 111 has an outer plate receiving hole 1115, the locking channel 1114 communicates with the outer plate receiving hole 1115, and the reset part 1192 is received in the outer plate receiving hole 1115 of the outer plate 111, so that the reset part 1192 can be hidden.

[0118] In the appendix Figures 20A to 28CIn this specific example of the rear panel assembly 11 shown, the first magnetic attraction part 1193 can be made of a usable metal material, and the second magnetic attraction part 1194 is a magnet, so that the first magnetic attraction part 1193 and the second magnetic attraction part 1194 can attract each other when they are brought close together. The first magnetic attraction part 1193 can be screwed onto the locking inner end 11914 of the locking part 1191, that is, the first magnetic attraction part 1193 is screwed onto the locking inner end 11914 of the locking part 1191. The second magnetic attraction part 1194 can be snapped onto the top of the outer panel 111, that is, the second magnetic attraction part 1194 is snapped onto the top of the outer panel 111.

[0119] Preferably, the top of the unlocking plate 113 has a plate hole 1134 that extends through opposite sides of the unlocking plate 113. The second magnetic attraction part 1194 is disposed on the side of the unlocking plate 113 facing away from the outer plate 111, and at least a portion of the second magnetic attraction part 1194 is exposed in the plate hole 1134 of the unlocking plate 113. (See attached diagram) Figure 25 The unlocking plate 113 has a pair of locking arms 1135, which are used to attach the second magnetic suction part 1194 to the top of the outer plate 111. The first magnetic suction part 1193 can extend into or retract from the plate hole 1134 of the unlocking plate 113. When the first magnetic suction part 1193 extends into the plate hole 1134 of the unlocking plate 113, the first magnetic suction part 1193 and the second magnetic suction part 1194 attract each other, so that the locking unit 119 locks the unlocking plate 113 and the reset part 1192 is in a compressed state. When the first magnetic suction part 1193 retracts from the plate hole 1134 of the unlocking plate 113, the first magnetic suction part 1193 and the second magnetic suction part 1194 disengage from each other, the locking unit 119 releases the unlocking plate 113 and the reset part 1192 is in an extended state.

[0120] In this specific example of the trolley of this utility model, after the first magnetic attraction part 1193 extends into the plate hole 1134 of the unlocking plate 113, the locking part 1191 extends into the plate hole 1134 of the unlocking plate 113, so that the locking unit 119 can reliably lock the unlocking plate 113. After the first magnetic attraction part 1193 exits the plate hole 1134 of the unlocking plate 113, the locking part 1191 exits the plate hole 1134 of the unlocking plate 113.

[0121] Preferably, the travel of the first magnetic suction part 1193 is greater than the distance between the surface of the second magnetic suction part 1194 exposed to the plate hole 1134 of the unlocking plate 113 and the surface of the unlocking plate 113 facing the outer plate 111. In this way, after the first magnetic suction part 1193 disengages from the second magnetic suction part 1194, there is a gap between the first magnetic suction part 1193 and the surface of the unlocking plate 113 facing the outer plate 111. This prevents the first magnetic suction part 1193 from scraping the surface of the unlocking plate 113 when the unlocking plate 113 moves up and down within the plate cavity 116 of the rear plate assembly 11.

[0122] Reference Appendix Figures 21 to 24 The locking unit 119 further includes an operating part 1195, which is U-shaped. Its opposite ends are rotatably mounted on opposite sides of the locking outer end 11915 of the locking part 1191 and respectively attached to the outer plate 111. When the operating part 1195 is pressed in a direction close to the outer plate 111, the operating part 1195 and the outer plate 111 cooperate with each other. The operating part 1195 can pull the locking part 1191 outward to separate the first magnetic part 1193 and the second magnetic part 1194 from each other.

[0123] Reference Appendix Figure 27 and Figure 28A When the foldable storage device 10 is in the folded state, the unlocking plate 113 is located in the plate cavity 116 of the rear plate assembly 11. The first magnetic attraction part 1193 and the second magnetic attraction part 1194 of the locking unit 119 attract each other. The locking inner end 11914 of the locking part 1191 extends into the plate hole 1134 of the unlocking plate 113, so that the locking unit 119 locks the unlocking plate 113. The bottom of the unlocking plate 113 and the bottom edge 1112 of the outer plate 111 cause the leaf spring 1181 of the leaf spring unit 118 to be in a compressed state. The locking spring 115 keeps the hook part 1143 of the locking hook 114 in the position of hooking the locking protrusion 121 of the front plate assembly 12. Thus, the rear plate assembly 11 locks the front plate assembly 12.

[0124] Reference Appendix Figure 28BWhen the operating part 1195 is pressed toward the outer plate 111, the operating part 1195 and the outer plate 111 cooperate with each other. The operating part 1195 can pull the locking part 1191 outward to separate the first magnetic part 1193 and the second magnetic part 1194. The locking inner end 11914 of the first magnetic part 1193 and the locking part 1191 exits the plate hole 1134 of the unlocking plate 113, so that the locking unit 119 releases the unlocking plate 113. At this time, the reset part 1192 is in a compressed state and there is a gap between the first magnetic part 1193 and the surface of the unlocking plate 113 facing the outer plate 111.

[0125] Reference Appendix Figure 28C After the locking inner end 11914 of the first magnetic suction part 1193 and the locking part 1191 exits the plate hole 1134 of the unlocking plate 113, causing the locking unit 119 to release the unlocking plate 113, the leaf spring 1181 of the leaf spring unit 118 pushes the unlocking plate 113 upward in the plate cavity 116 of the rear plate assembly 11 during the extension process. During the upward movement, the unlocking plate 113 applies force to the driven part 1142 of the lock hook 114 through the driving part 1131, so that the lock body 1141 driving the lock hook 114 rotates relative to the inner plate 112. During the rotation, the lock body 1141 allows the hook part 1143 to disengage from the locking protrusion 121 of the front plate assembly 12 and causes the lock spring 115 to deform and accumulate elastic potential energy. At this time, the rear plate assembly 11 releases the front plate assembly 12. When the user pulls the front panel assembly 12 away from the rear panel assembly 11, the middle part of the side panel assembly 13 unfolds outward, and the side panel assembly 13 drives the bottom panel assembly 14 to unfold downward in a synchronous and smooth manner, so as to form the storage cavity 15 between the rear panel assembly 11, the front panel assembly 12, the two side panel assemblies 13 and the two bottom panel assemblies 14.

[0126] Appendix Figure 29A and Figure 29B A modified example of the rear panel assembly 11 of the foldable storage device 10 of the trolley is shown, with attached... Figures 20A to 28C Unlike the rear panel assembly 11 of the foldable storage device 10 of the trolley shown, the attached... Figure 29A and Figure 29BIn this specific example of the rear panel assembly 11 shown, the top of the outer panel 111 has an operating channel 1116, wherein the locking unit 119 includes a blocking portion 1196, which is disposed on the top of the unlocking plate 113 such that the position of the blocking portion 1196 corresponds to the operating channel 1116 of the outer panel 111. The blocking portion 1196 can be blocked or released by the top edge 1117 of the outer panel 111. When the blocking portion 1196 is blocked by the top edge 1117 of the outer panel 111, the locking unit 119 locks the unlocking plate 113 and the position of the blocking portion 1196 corresponds to the position of the operating channel 1116 of the outer panel 111. When the blocking portion 1196 is released by the top edge 1117 of the outer panel 111, the locking unit 119 releases the unlocking plate 113.

[0127] When the obstructed portion 1196 is blocked by the top edge 1117 of the outer plate 111, the user can apply force directly to the obstructed portion 1196 through the operation channel 1116 of the outer plate 11 or indirectly to the obstructed portion 1196 through the unlocking plate 113, so that the obstructed portion 1196 moves laterally and is released by the top edge 1117 of the outer plate 111.

[0128] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments, and any modifications or variations of the implementation of the present invention may be made without departing from the stated principles.

Claims

1. A rear panel assembly, characterized in that, include: One outer panel; An inner panel, wherein the inner panel has at least one locking hole, wherein the inner panel is stacked on the outer panel, and a cavity is formed between the inner panel and the outer panel, wherein the locking hole of the inner panel communicates with the cavity. An unlocking plate, wherein the unlocking plate is movably disposed within the plate cavity; At least one locking hook, wherein the locking hook includes a lock body, a driven portion, and a hook portion, the driven portion extending rearward from the top of the lock body, the hook portion extending forward from the bottom of the lock body, wherein the lock body is configured to be rotatable relative to the inner plate, the driven portion extending through the lock hole in the inner plate to the plate cavity, and the driven portion being drivably connected to the unlocking plate; and At least one locking spring, wherein the locking spring is disposed between the inner plate and the hook portion for pushing the hook portion to move away from the inner plate.

2. The rear panel assembly according to claim 1, wherein a cavity opening is formed between the inner panel and the outer panel, the cavity opening communicating with the cavity, wherein the unlocking plate can be moved out of or into the cavity through the cavity opening.

3. The rear panel assembly according to claim 1, wherein the middle portion of each of the opposite sides of the inner panel has one of the lock holes, the rear panel assembly includes two lock hooks and two lock springs, the driven portion of one lock hook extends through one of the lock holes of the inner panel to the panel cavity and is drivably connected to one side of the unlocking plate, the driven portion of the other lock hook extends through the other lock hole of the inner panel to the panel cavity and is drivably connected to the other side of the unlocking plate, wherein a lock spring is respectively provided between the hook portion of each lock hook and each side portion of the inner panel.

4. The rear plate assembly according to claim 3, wherein the end of the driven portion of each of the lock hooks has a driven ramp, wherein each side of the unlocking plate has a driving portion in the middle, the driving portion having a driving ramp, wherein the driving ramp of the driving portion is located below the driven ramp of the driven portion, and the driving ramp of the driving portion and the driven ramp of the driven portion are in contact with each other or face each other, and when the unlocking plate moves upward, the driving ramp of the driving portion and the driven ramp of the driven portion cooperate to drive the lock body to rotate relative to the inner plate.

5. The rear panel assembly of claim 1, wherein the lock body of the lock hook is rotatably mounted to the inner panel such that the lock body is configured to be rotatable relative to the inner panel.

6. The rear panel assembly of claim 1, wherein the lock body of the lock hook is rotatably mounted to the inner panel and the outer panel such that the lock body is configured to be rotatable relative to the inner panel.

7. The rear plate assembly according to claim 1, wherein the locking spring is a compression spring, one end of the locking spring abutting against the inner plate and the other end abutting against the hook portion of the locking hook.

8. The rear panel assembly according to claim 7, wherein the inner panel has at least one panel receiving hole, the hook portion of the locking hook has a locking hook protrusion, the locking hook protrusion of the locking hook is inserted into one end of the locking spring, and the other end of the locking spring is received in the panel receiving hole of the inner panel.

9. The rear plate assembly according to any one of claims 1 to 8, wherein the rear plate assembly includes at least one leaf spring unit and a locking unit, wherein the leaf spring unit includes a leaf spring, one end of which abuts against the bottom edge of the outer plate and the other end of which can abut against the bottom of the unlocking plate, wherein the locking unit is operably disposed on the outer plate, the locking unit being capable of locking or releasing the unlocking plate, wherein when the locking unit locks the unlocking plate, the bottom of the unlocking plate and the bottom edge of the outer plate cause the leaf spring to be in a compressed state.

10. The rear plate assembly of claim 9, wherein the leaf spring unit includes a protective portion, the protective portion including a fixed seat and a movable seat, wherein the fixed seat is fixedly mounted on the outer plate, the fixed seat having a body channel and at least one limiting groove communicating with the body channel, the limiting groove extending from the bottom to the top of the fixed seat, wherein the movable seat has a body receiving hole and at least one limiting arm, the body receiving hole extending from the bottom to the top of the movable seat, the limiting arm extending laterally from the bottom of the movable seat, wherein the movable seat is movably disposed vertically in the body channel of the fixed seat such that the limiting arm protrudes into the limiting groove, the bottom of the leaf spring directly abuts against the bottom edge of the outer plate, the top of the leaf spring is received in the body receiving hole of the movable seat, and the top of the movable seat can abut against the bottom of the unlocking plate so that the top of the leaf spring abuts against the bottom of the unlocking plate through the movable seat.

11. The rear plate assembly of claim 9, wherein the leaf spring unit includes a protective portion, the protective portion including a fixing seat, the fixing seat being fixedly mounted to the outer plate, and the fixing seat having a groove and two protruding ribs, the two protruding ribs respectively protruding into the groove on opposite sides of the groove, the bottom of the leaf spring abutting against the fixing seat by sinking into the groove of the fixing seat, the two protruding ribs respectively protruding into the gaps at the bottom of the leaf spring so that the bottom of the leaf spring abuts against the bottom edge of the outer plate through the fixing seat, wherein the bottom of the unlocking plate has at least one plate protrusion capable of being inserted into the top of the leaf spring.

12. The rear panel assembly of claim 9, wherein the bottom of the unlocking plate has a locking groove, wherein the locking unit includes a locking part and a reset part, the locking part having a locking end, the locking part being operably mounted to the bottom of the outer panel, the reset part being disposed between the locking part and the outer panel, the locking end of the locking part being capable of extending into or out of the locking groove of the unlocking plate, wherein when the locking end of the locking part extends into the locking groove of the unlocking plate, the locking unit locks the unlocking plate, and when the locking end of the locking part exits the locking groove of the unlocking plate, the locking unit releases the unlocking plate.

13. The rear panel assembly of claim 12, wherein the bottom of the outer panel has an outer panel notch, and the locking portion is rotatably mounted to the outer panel and located at the outer panel notch.

14. The rear plate assembly of claim 12, wherein the reset portion is a compression spring or a torsion spring.

15. The rear panel assembly of claim 9, wherein the top of the outer panel has a locking channel, wherein the locking unit includes a locking portion, a reset portion, a first magnetic attraction portion, and a second magnetic attraction portion, the locking portion having an opposing locking inner end and a locking outer end, the locking inner end of the locking portion extending through the locking channel of the outer panel to the panel cavity, the reset portion being fitted onto the locking portion, and opposite ends of the reset portion abutting against the outer panel and the locking outer end of the locking portion, respectively, the first magnetic attraction portion being installed... The locking unit is located at the inner locking end of the locking part, and the size of the first magnetic attraction part is larger than the opening size of the locking channel of the outer plate. The second magnetic attraction part is disposed on the top of the unlocking plate. The first magnetic attraction part and the second magnetic attraction part can attract each other. When the first magnetic attraction part and the second magnetic attraction part attract each other, the locking unit locks the unlocking plate and the reset part is in a compressed state. When the first magnetic attraction part and the second magnetic attraction part disengage from each other, the locking unit releases the unlocking plate and the reset part is in an extended state.

16. The rear panel assembly of claim 15, wherein the top of the unlocking plate has a plate hole extending through opposite sides of the unlocking plate, the second magnetic attraction portion is disposed on the side of the unlocking plate opposite to the outer plate, and at least a portion of the second magnetic attraction portion is exposed in the plate hole of the unlocking plate, wherein the first magnetic attraction portion is capable of extending into or retracting from the plate hole of the unlocking plate, and when the first magnetic attraction portion extends into the plate hole of the unlocking plate, the first magnetic attraction portion and the second magnetic attraction portion are capable of attracting each other, and when the first magnetic attraction portion retracts from the plate hole of the unlocking plate, the first magnetic attraction portion and the second magnetic attraction portion disengage from each other.

17. The rear panel assembly of claim 16, wherein the travel of the first magnetic attraction is greater than the distance between the surface of the second magnetic attraction exposed to the hole in the unlocking plate and the surface of the unlocking plate facing the outer plate.

18. The rear panel assembly of claim 15, wherein the first magnetic attraction portion is made of a magnetizable metal material, and the second magnetic attraction portion is a magnet.

19. The rear panel assembly of claim 9, wherein the top of the outer panel has an operating channel, wherein the locking unit includes a blocking portion, the blocking portion being disposed on the top of the unlocking plate such that the position of the blocking portion corresponds to the operating channel of the outer panel, the blocking portion being able to be blocked or released by the top edge of the outer panel, wherein when the blocking portion is blocked by the top edge of the outer panel, the locking unit locks the unlocking plate and the position of the blocking portion corresponds to the position of the operating channel of the outer panel, and when the blocking portion is released by the top edge of the outer panel, the locking unit releases the unlocking plate.

20. A foldable storage device, characterized in that, include: A front panel assembly, wherein the front panel assembly has at least one locking lug; Two side panel assemblies, wherein the middle portion of the side panel assembly is foldable inward; as well as The rear panel assembly according to any one of claims 1 to 19, wherein the rear panel assembly and the front panel assembly are arranged face to face, one of the opposite sides of the side panel assembly is rotatably mounted to one side of the front panel assembly and one side of the rear panel assembly, and the other of the opposite sides of the side panel assembly is rotatably mounted to the other side of the front panel assembly and the other side of the rear panel assembly. The foldable storage device has a folded state and an unfolded state, and the foldable storage device can switch between the folded state and the unfolded state. When the foldable storage device is in the folded state, the side panel assembly after being folded in the middle is clamped between the front panel assembly and the rear panel assembly, and the hook of the locking hook of the rear panel assembly hooks the locking protrusion of the front panel assembly. When the foldable storage device is in the unfolded state, a storage cavity is formed between the front panel assembly, the rear panel assembly and the two side panel assemblies.

21. The foldable storage device according to claim 20, wherein the foldable storage device includes two base plate assemblies, the middle portions of the two base plate assemblies are foldable upwards, and the opposite ends of one base plate assembly are rotatably mounted to one end of the two side plate assemblies at the bottom of the side plate assembly, and the opposite ends of the other base plate assembly are rotatably mounted to the other end of the two side plate assemblies at the bottom of the base plate assembly.

22. The foldable storage device according to claim 21, wherein the base plate assembly includes a triangular base plate main plate and two triangular base plate secondary plates, the two base plate secondary plates are rotatably mounted on opposite ends of the base plate main plate, and the unfolded base plate assembly is rectangular, one base plate secondary plate is rotatably mounted on the bottom of one of the side plate assemblies, and the other base plate secondary plate is rotatably mounted on the bottom of the other side plate assembly.

23. The foldable storage device according to claim 22, wherein after the base plate assembly is unfolded, the connection position between the main base plate and the secondary base plate is raised upward.

24. The foldable storage device according to claim 22, wherein after the base plate assembly is unfolded, there is an included angle α between the top surface of the main base plate and the top surface of the secondary base plate, and an included angle β between the bottom surface of the main base plate and the bottom surface of the secondary base plate, wherein the included angle α is greater than 180° and the included angle β is less than 180°.

25. A cart, characterized in that, include: One lever; A set of wheels; as well as According to any one of claims 21 to 24, the pull rod is disposed on the rear panel assembly, and the wheel is disposed at the bottom of the rear panel assembly.

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