Foldable storage device and cart

Abstract

The invention discloses a foldable storage device and a buggy, and the storage device comprises a front plate unit, a rear plate unit, a side plate unit of which the middle part can be folded inwards, and a bottom plate unit of which the end part can be folded upwards, the two opposite sides of one side plate unit are rotationally installed on one side of the front plate unit and one side of the rear plate unit respectively, and the two opposite sides of the other side plate unit are rotationally installed on the other side of the front plate unit and the other side of the rear plate unit respectively. The two opposite ends of one bottom plate unit are rotationally installed at one ends of the two side plate units at the bottoms of the side plate units respectively, and the two opposite ends of the other bottom plate unit are rotationally installed at the other ends of the two side plate units at the bottoms of the side plate units respectively. Wherein an acute included angle is formed between the folding shaft of the bottom plate unit and the rotating shaft of the bottom plate unit and the side plate unit.

Description

Technical Field

[0001] The invention relates to a storage device, in particular to a foldable storage device and a trolley. Background Art

[0002] In the Chinese utility model patent with the authorization announcement number CN214777508U, the inventor disclosed a foldable storage box, whose box body includes a first fixed box board, a first foldable side box board, a second foldable side box board, a second fixed box board and a bottom box board, one side of the first foldable side box board is hinged to the first side of the first fixed box board, the other side of the first foldable side box board is hinged to the first side of the second fixed box board, one side of the second foldable side box board is hinged to the second side of the first fixed box board, the other side of the second foldable side box board is hinged to the second side of the second fixed box board, and one side of the bottom box board is hinged to the bottom of the second fixed box board. The process of folding the box body is to first fold the bottom box board close to the second fixed box board, and then fold the first foldable side box board and the second foldable side box board into the box body respectively. Correspondingly, the process of unfolding the box body is to first unfold the first foldable side box board and the second foldable side box board out of the box respectively, and then unfold the bottom box board. It can be seen that the defects of the folding storage box in the prior art are that the folding and unfolding process of the side box plate and the folding and unfolding process of the bottom box plate need to be performed separately, and the operation process is cumbersome. In addition, when the box body of the folding storage box is in a folded state, the first fixed box plate and the second fixed box plate located on the outside are not locked. When the user moves the folded storage box in a folded state, the first fixed box plate and the second fixed box plate are prone to move in opposite directions, causing the folding storage box to unfold uncontrollably, and even clamping items or the user's hands. Summary of the invention

[0003] An object of the present invention is to provide a foldable storage device and a cart, wherein the side panel unit and the bottom panel unit of the storage device can be linked, and the state of the bottom panel unit changes synchronously with the state of the side panel unit, so as to facilitate user operation.

[0004] One object of the present invention is to provide a foldable storage device and a cart, wherein the connection position between the bottom plate main plate and the bottom plate sub-plate of the bottom plate unit bulges upward, so that when the folding unit is folded inward, the state of the bottom plate unit can change smoothly and synchronously with the change of the state of the side plate unit.

[0005] One object of the present invention is to provide a foldable storage device and a cart, wherein after the storage device is switched to a folded state, the rear panel unit and the front panel unit of the storage device can be locked so that the storage device is reliably maintained in the folded state, avoiding uncontrolled changes in the state of the storage device.

[0006] According to one aspect of the present invention, the present invention provides a foldable storage device, comprising: a front panel unit; a rear panel unit, wherein the rear panel unit and the front panel unit are arranged face to face; Two side panel units, wherein the middle portion of the side panel units can be folded inward, wherein two opposite sides of one of the side panel units are rotatably mounted on one side of the front panel unit and one side of the rear panel unit, and two opposite sides of the other side panel unit are rotatably mounted on the other side of the front panel unit and the other side of the rear panel unit; and Two bottom plate units, wherein the opposite ends of the bottom plate units can be folded upwards, wherein the opposite ends of one of the bottom plate units are rotatably mounted on one end of the two side plate units at the bottom of the side plate unit, and the opposite ends of the other bottom plate unit are rotatably mounted on the other end of the two side plate units at the bottom of the side plate unit, wherein an acute angle is formed between the folding axis of the bottom plate unit and the rotation axis of the bottom plate unit and the side plate unit.

[0007] According to one embodiment of the present invention, the bottom plate unit includes a triangular bottom plate main plate and two triangular bottom plate sub-plates, the bottom plate main plate has a first main plate short side, a second main plate short side and a main plate long side, the bottom plate sub-plate has a first sub-plate short side, a second sub-plate short side and a sub-plate long side, the sub-plate long side of one bottom plate sub-plate and the first main plate short side of the bottom plate main plate are axially connected to form a folding axis of the bottom plate unit, the sub-plate long side of another bottom plate sub-plate and the second main plate short side of the bottom plate main plate are axially connected to form another folding axis of the bottom plate unit, the first sub-plate short sides of two bottom plate sub-plates of one bottom plate unit and one end of two side plate units are axially connected to form a rotation axis of the bottom plate unit and the side plate unit, the first sub-plate short sides of two bottom plate sub-plates of another bottom plate unit and the other end of two side plate units are axially connected to form a rotation axis of the bottom plate unit and the side plate unit.

[0008] According to an embodiment of the present invention, after the floor unit is unfolded, the connection position between the floor main plate and the floor sub-plate bulges upward.

[0009] According to one embodiment of the present invention, after the bottom plate unit is unfolded, an angle α is defined between the top surface of the bottom plate main plate and the top surface of the bottom plate sub-plate, and an angle β is defined between the bottom surface of the bottom plate main plate and the bottom surface of the bottom plate sub-plate, wherein the angle α is greater than 180° and the angle β is less than 180°.

[0010] According to one embodiment of the present invention, the front plate unit has at least one locking protrusion, and the rear plate unit includes a rear plate body, a baffle, an unlocking plate, at least one leaf spring, at least one locking hook and at least one locking spring, the baffle is installed on the inner side of the rear plate body, and the unlocking plate is movably arranged between the rear plate body and the baffle, the leaf spring is constructed so that one end is kept stationary relative to the bottom edge of the rear plate body, and the other end abuts against the bottom of the unlocking plate, the locking hook is rotatably installed on the baffle and is drivably connected to the unlocking plate, the locking hook can hook the locking protrusion of the front plate unit, and the locking spring is constructed so that one end abuts against the baffle, and the other end abuts against the locking hook.

[0011] According to one embodiment of the present invention, the lock hook includes a lock body, a pivot shaft, a hook body and a driven block, the pivot shaft is arranged at the bottom of the lock body, the hook body is arranged at the front side of the lock body, the driven block is arranged at the rear side of the lock body, the driven block has a driven inclined surface, wherein the side of the unlocking plate has at least one driving block, and the driving block has a driving inclined surface, wherein the baffle plate has a pair of pivot holes and a baffle plate channel adjacent to the pivot holes, the baffle plate channel of the baffle plate and the driving block of the unlocking plate correspond in the horizontal direction, wherein the opposite ends of the pivot shaft of the lock hook are respectively rotatably mounted on the pair of pivot holes of the baffle plate, the driven block extends to the driving block of the unlocking plate through the baffle plate channel of the baffle plate, and the driven inclined surface of the driven block is in contact with the driving inclined surface of the driving block, and the end of the lock spring abuts against the bottom of the hook body.

[0012] According to one embodiment of the present invention, the rear plate unit includes an obstruction portion, which is arranged at the top of the unlocking plate, and the obstruction portion can be blocked or released by the top edge of the rear plate body. When the obstruction portion is blocked by the top edge of the rear plate body, the unlocking plate and the rear plate body cause the leaf spring to be in a compressed state. When the obstruction portion is released by the top edge of the rear plate body, the leaf spring pushes the unlocking plate to move upward, so that the driving block and the driven block cooperate with each other to drive the lock hook to rotate.

[0013] According to one embodiment of the present invention, the rear panel body has an operating channel, and a portion of the unlocking plate adjacent to the obstructed portion corresponds to the operating channel of the rear panel body, or the obstructed portion corresponds to the operating channel of the rear panel body.

[0014] According to one embodiment of the present invention, the lock hook includes a lock body, a pivot shaft, a hook body and a driven block, the pivot shaft is arranged at the bottom of the lock body, the hook body is arranged at the front side of the lock body, the driven block is arranged at the rear side of the lock body, the driven block has a driven inclined surface, wherein the side of the unlocking plate has at least one driving block, the driving block has a driving inclined surface, wherein the baffle plate has a first pivot hole and a baffle plate channel adjacent to the first pivot hole, the baffle plate channel of the baffle plate and the driving block of the unlocking plate are horizontally Corresponding to the direction, the rear plate body has a second pivot hole, the second pivot hole of the rear plate body and the first pivot hole of the baffle plate correspond in the horizontal direction, wherein the opposite ends of the pivot axis of the lock hook are rotatably mounted on the first pivot hole of the baffle plate and the second pivot hole of the rear plate body respectively, the driven block extends to the driving block of the unlocking plate through the baffle plate channel of the baffle plate, and the driven inclined surface of the driven block is fitted with the driving inclined surface of the driving block, and the end of the locking spring abuts against the bottom of the hook body.

[0015] According to one embodiment of the present invention, the rear plate unit includes a spring seat, which includes a fixed seat and a movable seat installed on the fixed seat so as to be movably mounted up and down, the fixed seat is fixedly mounted on the rear plate body, the top of the movable seat can abut against the bottom of the unlocking plate, the bottom of the leaf spring abuts against the bottom edge of the rear plate body, and the top of the leaf spring abuts against the movable seat.

[0016] According to one embodiment of the present invention, the fixed seat includes a seat tube and a locking arm extending outward from the seat tube, the locking arm being locked to the rear plate main body, the seat tube having an active cavity, a bottom opening, a top opening and at least one limiting groove, the bottom opening and the top opening being respectively formed at the bottom and the top of the active cavity, the limiting groove being connected to the active cavity and extending from the bottom opening to the top opening direction, wherein the movable seat includes a seat body and at least one limiting arm extending laterally from the bottom of the seat body, the seat body having a first spring groove, the movable seat is installed in the active cavity of the seat tube through the bottom opening of the seat tube, the top of the seat body can extend to the outside of the seat tube through the top opening of the seat tube, the limiting arm of the movable seat is slidably arranged in the limiting groove of the seat tube, and the top of the leaf spring is accommodated in the first spring groove of the seat body.

[0017] According to an embodiment of the present invention, the storage device includes a locking unit, which is operably provided on the rear plate body and is configured to lock or release the unlocking plate.

[0018] According to one embodiment of the present invention, the unlocking plate has a locking groove, the rear plate body has an operating channel, the locking unit includes an operating part and a reset part, the operating part is operably installed on the rear plate body and corresponds to the operating channel, the reset part is arranged between the operating part and the rear plate body, and is used to reset the operating part after being operated, the operating part has a locking piece, and the locking piece of the operating part is arranged to be able to extend into or withdraw from the locking groove of the unlocking plate, when the locking piece extends into the locking groove of the unlocking plate, the locking unit locks the unlocking plate, and when the locking piece withdraws from the locking groove of the unlocking plate, the locking unit releases the unlocking plate.

[0019] According to an embodiment of the present invention, the operating portion is rotatably mounted on the bottom of the rear panel body.

[0020] According to another aspect of the present invention, the present invention further provides a foldable storage device, which includes a front plate unit, a rear plate unit, two side plate units and two bottom plate units and has an unfolded state and a folded state; Each of the side plate units comprises a first side plate and a second side plate, one side of the first side plate is connected to one side of the second side plate by an axis, the other side of the first side plate is connected to one side of the front plate unit by an axis, and the other side of the second side plate is connected to one side of the rear plate unit by an axis; Each of the bottom plate units comprises a triangular bottom plate main board and two triangular bottom plate sub-boards, the bottom plate main board having a first main board short side, a second main board short side and a main board long side, the bottom plate sub-board having a first sub-board short side, a second sub-board short side and a sub-board long side, the sub-board long sides of the two bottom plate sub-boards are respectively connected to the first main board short side and the second main board short side of the bottom plate main board by an axis, the first sub-board short sides of the two bottom plate sub-boards of one of the bottom plate units are respectively connected to the bottom of the first side plates of the two side plate units by an axis, and the first sub-board short sides of the two bottom plate sub-boards of the other bottom plate unit are respectively connected to the bottom of the second side plates of the two side plate units by an axis, when the first side plate and the second side plate rotate relative to each other, the bottom plate sub-board rotates synchronously relative to the bottom plate main board and the first side plate or the second side plate, so that the storage device can switch between the state and the folded state.

[0021] According to an embodiment of the present invention, when the storage device is in the unfolded state, the connection position between the bottom plate main plate and the bottom plate sub-plate bulges upward.

[0022] According to one embodiment of the present invention, when the storage device is in the expanded state, an angle α is defined between the top surface of the bottom plate main plate and the top surface of the bottom plate sub-plate, and an angle β is defined between the bottom surface of the bottom plate main plate and the bottom surface of the bottom plate sub-plate, wherein the angle α is greater than 180° and the angle β is less than 180°.

[0023] According to one embodiment of the present invention, when the storage device is in the unfolded state, the long side of the main board of the bottom plate main board of one bottom plate unit rests on the bottom of the front plate unit, the long side of the main board of the bottom plate main board of another bottom plate unit rests on the bottom of the rear plate unit, and the short sides of the second sub-plates of each of the bottom plate sub-plates of one bottom plate unit and the short sides of the second sub-plates of each of the bottom plate sub-plates of another bottom plate unit rest on each other.

[0024] According to one embodiment of the present invention, the bottom plate main board has at least one first main board latching buckle and at least one first main board latching groove on the first main board short side and the second main board short side respectively, the first main board latching buckle and the first main board latching groove are staggered with each other, the bottom plate sub-plate has at least one first sub-plate latching buckle and at least one first sub-plate latching groove on the sub-plate long side, the first sub-plate latching buckle and the first sub-plate latching groove are staggered with each other, wherein when the storage device is in the unfolded state, the first main board latching buckle of the bottom plate main board latches against the bottom plate sub-plate and is accommodated in the first sub-plate latching groove of the bottom plate sub-plate, and the first sub-plate latching buckle of the bottom plate sub-plate latches against the bottom plate main board and is accommodated in the first main board latching groove of the bottom plate main board.

[0025] According to one embodiment of the present invention, the first main board latching buckle of the bottom plate main board has a first main board latching body, the first main board latching groove of the bottom plate main board has a first main board latching groove, the first sub-board latching buckle of the bottom plate sub-board has a first sub-board latching body, the first sub-board latching groove of the bottom plate sub-board has a first sub-board latching groove, the first main board latching body of the first main board latching buckle can be buckled into the first sub-board latching groove of the bottom plate sub-board, and the first sub-board latching body of the first sub-board latching buckle can be buckled into the first main board latching groove of the bottom plate main board.

[0026] According to one embodiment of the present invention, the bottom panel sub-panel has at least one second sub-panel latching buckle and at least one second sub-panel latching groove on the short side of the second sub-panel, and the second sub-panel latching buckle and the second sub-panel latching groove are staggered with each other, wherein when the storage device is in the unfolded state, the second sub-panel latching buckle of one bottom panel sub-panel latches against another bottom panel sub-panel and is accommodated in the second sub-panel latching groove of this bottom panel sub-panel.

[0027] According to one embodiment of the present invention, a portion of the bottom plate main board located between the short sides of the second sub-boards of the two bottom plate sub-boards has at least one second main board docking buckle and at least one second main board docking groove, wherein when the storage device is in the unfolded state, the second main board docking buckle of the bottom plate main board of one bottom plate unit docks against another bottom plate main board and is accommodated in the second main board docking groove of this bottom plate main board.

[0028] According to one embodiment of the present invention, the second mainboard latching buckle of the bottom mainboard has a second mainboard latching body, and the second mainboard latching groove of the bottom mainboard has a second mainboard latching groove, and the second mainboard latching body of the second mainboard latching buckle of one bottom mainboard can be latched into the second mainboard latching groove of the second mainboard latching groove of another bottom mainboard.

[0029] According to one embodiment of the present invention, the front plate unit has at least one locking protrusion, and the rear plate unit includes a rear plate body, a baffle, an unlocking plate, at least one leaf spring, at least one locking hook and at least one locking spring, the baffle is installed on the inner side of the rear plate body, and the unlocking plate is movably arranged between the rear plate body and the baffle, the leaf spring is constructed so that one end is kept stationary relative to the bottom edge of the rear plate body, and the other end abuts against the bottom of the unlocking plate, the locking hook is rotatably installed on the baffle and is drivably connected to the unlocking plate, the locking hook can hook the locking protrusion of the front plate unit, and the locking spring is constructed so that one end abuts against the baffle, and the other end abuts against the locking hook.

[0030] According to another aspect of the present invention, the present invention further provides a cart, which includes a drawbar, a set of wheels and a foldable storage device, wherein the storage device includes: a front panel unit; a rear panel unit, wherein the rear panel unit and the front panel unit are arranged face to face; Two side panel units, wherein the middle portion of the side panel units can be folded inward, wherein two opposite sides of one of the side panel units are rotatably mounted on one side of the front panel unit and one side of the rear panel unit, and two opposite sides of the other side panel unit are rotatably mounted on the other side of the front panel unit and the other side of the rear panel unit; and Two bottom plate units, wherein the opposite ends of the bottom plate units can be folded upwards, wherein the opposite ends of one of the bottom plate units are rotatably mounted on one end of the two side plate units at the bottom of the side plate units, and the opposite ends of the other bottom plate unit are rotatably mounted on the other end of the two side plate units at the bottom of the side plate units, wherein an acute angle is formed between the folding axis of the bottom plate unit and the rotation axis of the bottom plate unit and the side plate unit, wherein the pull rod is mounted on the rear plate unit, wherein the wheels are respectively mounted on the bottom of the front plate unit and the bottom of the rear plate unit, or the wheels are mounted on the bottom of the rear plate unit.

[0031] According to another aspect of the present invention, the present invention further provides a cart, which includes a drawbar, a set of wheels and a foldable storage device, wherein the storage device includes a front plate unit, a rear plate unit, two side plate units and two bottom plate units and has an unfolded state and a folded state; Each of the side plate units comprises a first side plate and a second side plate, one side of the first side plate is connected to one side of the second side plate by an axis, the other side of the first side plate is connected to one side of the front plate unit by an axis, and the other side of the second side plate is connected to one side of the rear plate unit by an axis; Each of the bottom plate units comprises a triangular bottom plate main board and two triangular bottom plate sub-boards, the bottom plate main board has a first main board short side, a second main board short side and a main board long side, the bottom plate sub-board has a first sub-board short side, a second sub-board short side and a sub-board long side, the sub-board long sides of the two bottom plate sub-boards are respectively connected to the first main board short side and the second main board short side of the bottom plate main board by an axis, the first sub-board short sides of the two bottom plate sub-boards of one of the bottom plate units are respectively connected to the bottom of the first side plates of the two side plate units by an axis, and the other The short sides of the first sub-panels of the two bottom panel sub-panels of the bottom panel unit are respectively axially connected to the bottoms of the second side panels of the two side panel units, wherein when the first side panel and the second side panel rotate relative to each other, the bottom panel sub-panels rotate synchronously relative to the bottom panel main panel and the first side panel or the second side panel, so that the storage device can switch between the state and the folded state, wherein the pull rod is installed on the rear panel unit, wherein the wheels are respectively installed at the bottom of the front panel unit and the bottom of the rear panel unit, or the wheels are installed at the bottom of the rear panel unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1A and Figure 1B They are three-dimensional schematic diagrams from one viewing angle of a foldable storage device in an unfolded state according to a preferred embodiment of the present invention.

[0033] Figure 2 yes Figure 1B A magnified view of a local location.

[0034] Figure 3 It is a three-dimensional schematic diagram from one viewing angle of the storage device in the folded state according to the above preferred embodiment of the present invention.

[0035] Figure 4 It is a three-dimensional schematic diagram from another perspective of the storage device in the folded state according to the above preferred embodiment of the present invention.

[0036] Figure 5 It is a schematic diagram of an exploded view of the storage device in the unfolded state according to the above preferred embodiment of the present invention.

[0037] Figure 6 It is a schematic exploded view from another perspective of the storage device in the unfolded state according to the above preferred embodiment of the present invention.

[0038] Figure 7 It is a cross-sectional schematic diagram of a position of the storage device in the folded state according to the above preferred embodiment of the present invention.

[0039] Figure 8 yes Figure 7 A magnified view of a local location.

[0040] Fig. 9 It is a cross-sectional schematic diagram of another position of the storage device in the folded state according to the above preferred embodiment of the present invention.

[0041] Fig.10 yes Fig. 9 A magnified view of a local location.

[0042] Fig.11 It is a cross-sectional schematic diagram of another position of the storage device in the folded state according to the above preferred embodiment of the present invention.

[0043] Fig.12 yes Fig.11 A magnified view of a local location.

[0044] Fig.13 It is a three-dimensional schematic diagram from one viewing angle of a rear plate unit of the storage device according to the above preferred embodiment of the present invention.

[0045] Fig.14 yes Fig.13 A magnified view of a local location.

[0046] Fig.15It is a three-dimensional schematic diagram of the rear plate unit of the storage device according to the above preferred embodiment of the present invention from another viewing angle.

[0047] Fig.16 yes Fig.15 A magnified view of a local location.

[0048] Fig.17 It is a schematic diagram of an exploded view of the rear plate unit of the storage device according to the above preferred embodiment of the present invention from one perspective.

[0049] Fig.18 yes Fig.17 A magnified view of a local location.

[0050] Fig.19 yes Fig.17 An enlarged view of another local location.

[0051] Fig. 20 It is a schematic diagram of an exploded view of the rear panel unit of the storage device according to the above preferred embodiment of the present invention from another perspective.

[0052] Fig.21 yes Fig. 20 A magnified view of a local location.

[0053] Fig. 22 yes Fig. 20 An enlarged view of another local location.

[0054] Fig.23 It is a three-dimensional schematic diagram of a partial structure of the rear plate unit of the storage device according to the above preferred embodiment of the present invention.

[0055] Fig.24 yes Fig.23 A magnified view of a local location.

[0056] Fig.25 yes Fig.23 An enlarged view of another local location.

[0057] Fig.26 It is a three-dimensional schematic diagram of two bottom plate units of the storage device according to the above preferred embodiment of the present invention from one viewing angle.

[0058] Fig. 27 It is a three-dimensional schematic diagram of the two bottom plate units of the storage device according to the above preferred embodiment of the present invention from another viewing angle.

[0059] Fig.28 It is a schematic diagram of an exploded view of the two bottom plate units of the storage device according to the above preferred embodiment of the present invention from one perspective.

[0060] Fig.29 It is a schematic diagram of the decomposition of the two bottom plate units of the storage device according to the above preferred embodiment of the present invention from another perspective.

[0061] Fig.30 It is a cross-sectional schematic diagram of one position of the above-mentioned partial part of the two bottom plate units of the storage device of the above-mentioned preferred embodiment of the present invention.

[0062] Fig.31 It is a cross-sectional schematic diagram of one position of the above-mentioned partial part of the two bottom plate units of the storage device of the above-mentioned preferred embodiment of the present invention.

[0063] Fig.32 It is a three-dimensional schematic diagram from one perspective of a bottom plate unit of the storage device according to the above preferred embodiment of the present invention.

[0064] Fig.33 It is a three-dimensional schematic diagram of another viewing angle of one of the bottom plate units of the storage device according to the above preferred embodiment of the present invention.

[0065] Fig.34 It is a schematic diagram of an exploded view of a side panel unit of the storage device according to the above preferred embodiment of the present invention from one perspective.

[0066] Fig.35 It is a schematic diagram of an exploded view from another perspective of the side panel unit of the storage device according to the above preferred embodiment of the present invention.

[0067] Fig.36 It is a three-dimensional schematic diagram of a modified example of the rear plate unit of the storage device according to the above preferred embodiment of the invention.

[0068] Fig.37 It is a schematic diagram of an exploded view of the rear panel unit of the storage device according to the above preferred embodiment of the invention from one perspective.

[0069] Fig.38 It is a schematic diagram of an exploded view from another perspective of the rear panel unit of the storage device according to the above preferred embodiment of the invention.

[0070] Fig.39 It is a three-dimensional schematic diagram of a local position of the rear plate unit of the storage device according to the above preferred embodiment of the invention.

[0071] Fig.40 It is a schematic cross-sectional view of the above-mentioned local position of the rear plate unit of the storage device according to the above-mentioned preferred embodiment of the invention.

[0072] Fig.41It is a cross-sectional schematic diagram from a three-dimensional perspective of a position of the rear plate unit of the storage device according to the above preferred embodiment of the invention.

[0073] Fig.42 yes Fig.41 A magnified view of a local location.

[0074] Fig.43 It is a cross-sectional schematic diagram from a three-dimensional perspective of another position of the rear plate unit of the storage device according to the above preferred embodiment of the invention.

[0075] Fig.44 yes Fig.43 A magnified view of a local location.

[0076] Fig.45 It is a schematic cross-sectional view from a plane perspective of another position of the rear plate unit of the storage device according to the above preferred embodiment of the invention.

[0077] Figure 46 to Figure 49 They are Fig.45 A magnified view of a local position in different states. DETAILED DESCRIPTION

[0078] Before describing in detail any embodiment of the present invention, it should be understood that the present invention is not limited in its application to the construction and arrangement details of the components described below or illustrated in the following figures. The present invention can have other embodiments and can be practiced or carried out in various ways. In addition, it should be understood that the words and terms used here are for descriptive purposes and should not be considered restrictive. The use of "including" or "having" and its variations herein is intended to cover the items and their equivalents and additional items displayed below. Unless otherwise specified or limited, the terms "install", "connect", "support" and "couple" and their variations are widely used and cover direct installation and indirect installation, connection, support and connection. In addition, "connect" and "couple" are not limited to physical or mechanical connections or connections.

[0079] Furthermore, on the first aspect, in the disclosure of the present invention, the orientation or positional relationship indicated by terms such as "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or positional relationship shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore the above terms cannot be understood as limitations on the present invention; on the second aspect, the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" cannot be understood as a limitation on the quantity.

[0080] With reference to the accompanying drawings of the present invention Figure 1A to Figure 35 A cart according to a preferred embodiment of the present invention will be disclosed and explained in the following description, wherein the cart includes a foldable storage device 10, a set of wheels 20 and a pull rod 30, a set of the wheels 20 is arranged at the bottom of the storage device 10, and the pull rod 30 is arranged on the side of the storage device 10.

[0081] The storage device 10 has an unfolded state and a folded state, and the storage device 10 can switch between the unfolded state and the folded state. When the storage device 10 is in the unfolded state, Figure 1B As shown, the storage device 10 forms a storage cavity 100 for storing items. When the storage device 10 is in the folded state, Figure 3 and Figure 4 As shown, the storage device 10 has a relatively small size.

[0082] In one example of the pulling cart of the present invention, Figure 1A , Figure 1B , Figures 3 to 7 , Fig. 9 , Fig.11 As shown, the storage device 10 includes a front plate unit 11 , a rear plate unit 12 , two side plate units 13 and two bottom plate units 14 .

[0083] The front panel unit 11 and the rear panel unit 12 are arranged face to face. Figure 1A to Figure 35In the illustrated specific example of the trolley of the present invention, one wheel 20 is respectively installed on opposite sides of the bottom of the front plate unit 11, and one wheel 20 is respectively installed on opposite sides of the bottom of the rear plate unit 12. Optionally, in other examples of the trolley of the present invention, the trolley may only have one wheel 20 respectively installed on opposite sides of the bottom of the rear plate unit 12. The pull rod 30 is installed on the rear plate unit 12. Preferably, the pull rod 30 is a telescopic rod, and its height is adjustable.

[0084] The middle part of each side panel unit 13 is foldable. Specifically, each side panel unit 13 includes a first side panel 131 and a second side panel 132, and one side of the first side panel 131 and one side of the second side panel 132 are connected by an axis, so that the middle part of the side panel unit 13 is foldable. The side of the first side panel 131 of one side panel unit 13 that faces away from the second side panel 132 is axially connected to the side of the front panel unit 11, and the side of the second side panel 132 of this side panel unit 13 that faces away from the first side panel 131 is axially connected to the side of the rear panel unit 12, that is, the opposite sides of this side panel unit 13 are rotatably mounted on one side of the front panel unit 11 and one side of the rear panel unit 12, respectively; the side of the first side panel 131 of another side panel unit 13 that faces away from the second side panel 132 is axially connected to the other side of the front panel unit 11, and the side of the second side panel 132 of this side panel unit 13 that faces away from the first side panel 131 is axially connected to the other side of the rear panel unit 12, that is, the opposite sides of this side panel unit 13 are rotatably mounted on the other side of the front panel unit 11 and the other side of the rear panel unit 12, respectively.

[0085] Both ends of each of the bottom plate units 14 are foldable. Figure 26 to Figure 32 Each of the bottom plate units 14 includes a bottom plate main board 141 and two bottom plate sub-boards 142. One of the bottom plate sub-boards 142 is rotatably mounted on one end of the bottom plate main board 141. The connection position between the bottom plate sub-board 142 and the bottom plate main board 141 forms a folding axis. The other bottom plate sub-board 142 is rotatably mounted on the other end of the bottom plate main board 141. The connection position between the bottom plate sub-board 142 and the bottom plate main board 141 forms another folding axis. In this way, the two ends of the bottom plate unit 14 can be folded.

[0086] More specifically, see Attachment Figure 26 to Figure 33The bottom plate main board 141 is triangular in shape, and has a first main board short side 1411, a second main board short side 1412, and a main board long side 1413. The bottom plate sub-board 142 is triangular in shape, and has a first sub-board short side 1421, a second sub-board short side 1422, and a sub-board long side 1423. The first main board short side 1411 of the bottom plate main board 141 and the sub-board long side 1423 of one of the bottom plate sub-boards 142 are connected by an axis, so that the bottom plate sub-board 142 is rotatably mounted on one end of the bottom plate main board 141, so that this end of the bottom plate unit 14 is foldable, and the second main board short side 1412 of the bottom plate main board 141 and the sub-board long side 1423 of another of the bottom plate sub-boards 142 are connected by an axis, so that the bottom plate sub-board 142 is rotatably mounted on one end of the bottom plate main board 141, so that this end of the bottom plate unit 14 is foldable.

[0087] In the attached Figure 1A to Figure 35 In the specific example of the trolley of the present invention shown, the main floor panel 141 and the sub-floor panel 142 are both right-angled isosceles triangles when viewed from a top view, so that after the floor panel unit 14 is unfolded, the floor panel unit 14 is rectangular.

[0088] The main board long side 1413 of the bottom plate main board 141 of one of the bottom plate units 14 is adjacent to the bottom of the front plate unit 11, the first sub-plate short side 1421 of one of the bottom plate sub-plates 142 of the bottom plate unit 14 is connected by an axis to the bottom of the first side plate 131 of one of the side plate units 13, and the first sub-plate short side 1421 of another of the bottom plate sub-plates 142 is connected by an axis to the bottom of the first side plate 131 of another of the side plate units 13; the main board long side 1413 of the bottom plate main board 141 of another of the bottom plate units 14 is adjacent to the bottom of the rear plate unit 12, the first sub-plate short side 1421 of one of the bottom plate sub-plates 142 of the bottom plate unit 14 is connected by an axis to the bottom of the second side plate 132 of one of the side plate units 13, and the first sub-plate short side 1421 of another of the bottom plate sub-plates 142 is connected by an axis to the bottom of the second side plate 132 of another of the side plate units 13.

[0089] In other words, the opposite ends of one bottom plate unit 14 are rotatably mounted on one end of the two side plate units 13 at the bottom of the side plate unit 13, respectively, and the opposite ends of the other bottom plate unit 14 are rotatably mounted on the other end of the two side plate units 13 at the bottom of the side plate unit 13, respectively, and there is an acute angle between the folding axis of the bottom plate unit 14 and the rotation axis of the bottom plate unit 14 and the side plate unit 13. In this way, the side plate unit 13 and the bottom plate unit 14 can be linked, and the state of the bottom plate unit 14 changes synchronously with the change of the state of the side plate unit 13, that is, when the side plate unit 13 is unfolded, the bottom plate unit 14 is driven by the side plate unit 13 to unfold synchronously, and when the side plate unit 13 is folded, the bottom plate unit 14 is driven by the side plate unit 13 to fold synchronously, so as to facilitate user operation.

[0090] Specifically, when the middle portion of the side panel unit 13 is pushed toward the storage cavity 100 of the storage device 10 so that the first side panel 131 and the second side panel 132 rotate around the rotation axis of the first side panel 131 and the second side panel 132 and the side panel unit 13 is folded inward, first, the first side panel 131 and the front panel unit 11 rotate around the rotation axis of the first side panel 131 and the front panel unit 11, second, the second side panel 132 and the rear panel unit 12 rotate around the rotation axis of the second side panel 132 and the rear panel unit 12, and third, the bottom panel sub-panel of the bottom panel unit 14 142 and the bottom plate main board 141 rotate around the rotation axis (folding axis) of the bottom plate sub-plate 142 and the bottom plate main board 141 so that the bottom plate unit 14 is folded upward; fourthly, the bottom plate sub-plate 142 and the first side plate 131 of one bottom plate unit 14 rotate around the rotation axis of the bottom plate sub-plate 142 and the first side plate 131; fifthly, the bottom plate sub-plate 142 and the second side plate 132 of another bottom plate unit 14 rotate around the rotation axis of the bottom plate sub-plate 142 and the second side plate 132, so that the storage device 10 can switch from the unfolded state to the folded state. That is, as long as the middle part of the side panel unit 13 is pushed toward the storage cavity 100 of the storage device 10 so that the first side panel 131 and the second side panel 132 rotate around the rotation axis of the first side panel 131 and the second side panel 132, the storage device 10 can be switched from the unfolded state to the folded state, which is convenient for user operation. It can be understood that all the above-mentioned rotation actions are synchronized.

[0091] Correspondingly, when the middle part of the side panel unit 13 is pushed outward to rotate the first side panel 131 and the second side panel 132 around the rotation axis of the first side panel 131 and the second side panel 132 to unfold the side panel unit 13, first, the first side panel 131 and the front panel unit 11 rotate around the rotation axis of the first side panel 131 and the front panel unit 11, second, the second side panel 132 and the rear panel unit 12 rotate around the rotation axis of the second side panel 132 and the rear panel unit 12, and third, the bottom panel sub-panel 142 of the bottom panel unit 14 and the bottom panel main panel 141 rotates around the rotation axis (folding axis) of the bottom plate sub-plate 142 and the bottom plate main plate 141 to unfold the bottom plate unit 14. Fourthly, the bottom plate sub-plate 142 and the first side plate 131 of one bottom plate unit 14 rotate around the rotation axis of the bottom plate sub-plate 142 and the first side plate 131. Fifthly, the bottom plate sub-plate 142 and the second side plate 132 of another bottom plate unit 14 rotate around the rotation axis of the bottom plate sub-plate 142 and the second side plate 132. In this way, the storage device 10 can be switched from the folded state to the unfolded state. In other words, as long as the middle part of the side plate unit 13 is pushed outward to unfold the side plate unit 13, the storage device 10 can be switched from the folded state to the unfolded state, which is convenient for user operation. It can be understood that all the above-mentioned rotation actions are synchronized.

[0092] Preferably, in this specific example of the pulling cart of the present invention, Figure 26 to Figure 33 As shown, there is an angle between the extension direction of the bottom plate main plate 141 of the bottom plate unit 14 and the extension direction of the bottom plate sub-plate 142, and the connection position between the bottom plate main plate 141 and the bottom plate sub-plate 142 bulges upward.

[0093] Specifically, Fig.31As shown, there is an angle α between the top surface of the bottom plate main board 141 and the top surface of the bottom plate sub-board 142, and the angle α is greater than 180°. Correspondingly, there is an angle β between the bottom surface of the bottom plate main board 141 and the bottom surface of the bottom plate sub-board 142, and the angle β is less than 180°, so that the extension direction of the bottom plate main board 141 of the bottom plate unit 14 and the extension direction of the bottom plate sub-board 142 have an angle, and the connection position of the bottom plate main board 141 and the bottom plate sub-board 142 is raised upward. In this way, when facing the storage device When the middle part of the side panel unit 13 is pushed in the direction of the storage cavity 100 of 10 so that the first side panel 131 and the second side panel 132 rotate around the rotation axis of the first side panel 131 and the second side panel 132, the bottom panel sub-panel 142 and the bottom panel main board 141 will automatically and smoothly rotate around the rotation axis of the bottom panel sub-panel 142 and the bottom panel main board 141 to fold the bottom panel unit 14, thereby avoiding the bottom panel unit 14 from being "stuck" to ensure that the storage device 10 switches from the unfolded state to the folded state.

[0094] Preferably, in the attached Figure 1A to Figure 35 In this specific example of the cart of the present invention shown, when the storage device 10 is in the unfolded state, the main board long side 1413 of the bottom plate main board 141 of one bottom plate unit 14 is placed against the bottom of the front plate unit 11, so that the bottom of the front plate unit 11 can support the bottom plate main board 141 of the bottom plate unit 14 upward, and the main board long side 1413 of the bottom plate main board 141 of another bottom plate unit 14 is placed against the bottom of the rear plate unit 12, so that the bottom of the rear plate unit 12 can support the bottom plate main board 141 of the bottom plate unit 14 upward, and the second sub-plate short sides 1422 of the two bottom plate sub-plates 142 of one bottom plate unit 14 and the other The short sides 1422 of the second sub-plates of the two bottom plate sub-plates 142 of one bottom plate unit 14 overlap each other, and the parts of the second sub-plate short sides 1422 of the bottom plate main plate 141 of one bottom plate unit 14 located at the two bottom plate sub-plates 142 and the parts of the second sub-plate short sides 1422 of the bottom plate main plate 141 of another bottom plate unit 14 located at the two bottom plate sub-plates 142 overlap each other. In this way, the load-bearing capacity of the bottom plate unit 14 can be increased. When the items are stored in the storage cavity 100 of the storage device 10, the trolley can prevent the items from compressing and deforming the bottom plate unit 14, which is not only beneficial to improve the reliability of the trolley but also can protect the items.

[0095] It is understandable that since the wheels 20 are installed at the bottom of the front plate unit 11 and the bottom of the rear plate unit 12, the bottom plate unit 14 is suspended in the air, so improving the load-bearing capacity of the bottom plate unit 14 is crucial for the reliability of the trolley.

[0096] Reference Figure 5 , Figure 6 , Fig.34 and Fig.35 One side of the first side plate 131 of the side plate unit 13 has a row of shaft bodies 1311 and multiple pairs of rotating shafts 1312, and each pair of the rotating shafts 1312 is respectively arranged at the opposite ends of each shaft body 1311. Correspondingly, one side of the second side plate 132 has a row of shaft grooves 1321 and multiple pairs of shaft holes 1322, and each pair of the shaft holes 1322 faces each shaft groove 1321, wherein each shaft body 1311 of the first side plate 131 is rotatably arranged in each shaft groove 1321 of the second side plate 132, and each rotating shaft 1312 of the first side plate 131 is rotatably extended to each shaft hole 1322 of the second side plate 132. In this way, one side of the first side plate 131 and one side of the second side plate 132 are connected by an axis, so that the middle part of the side plate unit 13 is foldable.

[0097] Preferably, one side of the first side panel 131 of the side panel unit 13 has a row of blocking platforms 1313, and the blocking platforms 1313 are adjacent to the shaft body 1311. Correspondingly, one side of the second side panel 132 has a row of side panel grooves 1323, and the side panel grooves 1323 are adjacent to the shaft groove 1321. When the storage device 10 is in the expanded state, the respective blocking platforms 1313 of the first side panel 131 extend to the respective side panel grooves 1323 of the second side panel 132, respectively. In this way, when the items stored in the storage cavity 100 of the storage device 10 push the middle part of the side panel unit 13 outward, the blocking platforms 1313 of the first side panel 131 and the inner walls of the second side panel 132 for forming the side panel grooves 1323 interact with each other to prevent the first side panel 131 and the second side panel 132 from rotating relative to each other, thereby improving the reliability and stability of the trolley. That is, after the side panel unit 13 is unfolded, the blocking platform 1313 of the first side panel 131 and the inner wall of the second side panel 132 for forming the side panel groove 1323 interact with each other, so that the side panel unit 13 can only be folded inward.

[0098] Reference Figure 5 , Figure 6 , Fig.34 and Fig.35The side panel unit 13 further includes a locking device 133. After the first side panel 131 and the second side panel 132 are unfolded, the locking device 133 is used to lock the first side panel 131 and the second side panel 132 to prevent the first side panel 131 and the second side panel 132 from rotating uncontrollably around the rotation axis of the first side panel 131 and the second side panel 132. In this way, the storage device 10 can be stably maintained in the unfolded state.

[0099] It is worth mentioning that the specific structure of the locking device 133 and the connection relationship between the locking device 133 and the first side plate 131 and the second side plate 132 are recorded in the patent document (TWM659149U) of Taiwan Province, China, and the present invention will not be repeated here.

[0100] Reference Figure 5 , Figure 6 , Fig.34 and Fig.35 The front panel unit 11 has at least one front panel shaft hole 111 on opposite sides respectively, and the first side panel 131 has at least one first side shaft hole 1314 on the side facing away from the second side panel 132. The position of the front panel shaft hole 111 of the front panel unit 11 and the position of the first side shaft hole 1314 of the first side panel 131 correspond in height direction, wherein the storage device 10 further includes a plurality of assembly shafts 15, a part of the assembly shaft 15 is inserted into the front panel shaft hole 111 of the front panel unit 11, and the other part is inserted into the first side shaft hole 1314 of the first side panel 131, so that the front panel unit 11 and the first side panel 131 are connected by an axis. In a specific example of the trolley of the present invention, the top and bottom of each side of the front panel unit 11 are respectively provided with at least one front panel axis hole 111, and the top and bottom of the side of the first side panel 131 facing away from the second side panel 132 are respectively provided with at least one first side axis hole 1314, so that one assembly axis 15 is connected to the front panel unit 11 and the first side panel 131 at the top axis, and another assembly axis 15 is connected to the front panel unit 11 and the first side panel 131 at the bottom axis, so as to improve the stability and reliability of the trolley.

[0101] Continue to refer to the attached Figure 5 , Figure 6 , Fig.34 and Fig.35The rear plate unit 12 has at least one rear plate shaft hole 121 on opposite sides respectively, and the second side plate 132 has at least one second side shaft hole 1324 on the side facing away from the first side plate 131. The position of the rear plate shaft hole 121 of the rear plate unit 12 and the position of the second side shaft hole 1324 of the second side plate 132 correspond in height direction, wherein a part of the assembly shaft 15 is inserted into the rear plate shaft hole 121 of the rear plate unit 12, and the other part is inserted into the second side shaft hole 1324 of the second side plate 132, so that the rear plate unit 12 and the second side plate 132 are connected by an axis.

[0102] In a specific example of the trolley of the present invention, at least one rear plate shaft hole 121 is respectively provided at the top and bottom of each side of the rear plate unit 12, and at least one second side shaft hole 1324 is respectively provided at the top and bottom of the side of the second side plate 132 facing away from the first side plate 131, so that one assembly shaft 15 is axially connected to the rear plate unit 12 and the second side plate 132 at the top, and another assembly shaft 15 is axially connected to the rear plate unit 12 and the second side plate 132 at the bottom, so as to improve the stability and reliability of the trolley.

[0103] Reference Figure 5 , Figure 6 , Figure 26 to Figure 33 The bottom plate sub-plate 142 has at least one first sub-plate shaft hole 1424 on the first sub-plate short side 1421, the bottom of the first side plate 131 has at least one first bottom shaft hole 1315, and the bottom of the second side plate 132 has at least one second bottom shaft hole 1325. A portion of the assembly shaft 15 is inserted into the first sub-plate shaft hole 1424 of one bottom plate sub-plate 142, and the other portion is inserted into the first bottom shaft hole 1315 of the first side plate 131, so that the first sub-plate short side 1421 of the bottom plate sub-plate 142 and the bottom of the first side plate 131 are axially connected, a portion of the other assembly shaft 15 is inserted into the first sub-plate shaft hole 1424 of another bottom plate sub-plate 142, and the other portion is inserted into the second bottom shaft hole 1325 of the second side plate 132, so that the first sub-plate short side 1421 of the bottom plate sub-plate 142 and the bottom of the second side plate 132 are axially connected.

[0104] Reference Figure 5 , Figure 6 , Figure 26 to Figure 33The bottom plate main board 141 has at least one main board shaft hole 1414 at the first main board short side 1411 and the second main board short side 1412 respectively, and the bottom plate sub-plate 142 has at least one second sub-plate shaft hole 1425 at the sub-plate long side 1423. A part of the assembly shaft 15 is inserted into the main board shaft hole 1414 of the first main board short side 1411 of the bottom plate main board 141, and the other part is inserted into the second sub-plate shaft hole 1425 of the bottom plate sub-plate 142. The sub-plate long side 1423 of the plate 142 and the first main plate short side 1411 of the bottom plate main plate 141 are axially connected, a portion of another assembly axis 15 is inserted into the main plate axis hole 1414 of the second main plate short side 1412 of the bottom plate main plate 141, and the other portion is inserted into the second sub-plate axis hole 1425 of another bottom plate sub-plate 142, so that the sub-plate long side 1423 of the bottom plate sub-plate 142 and the first main plate short side 1411 of the bottom plate main plate 141 are axially connected.

[0105] Continue to refer to the attached Figure 5 , Figure 6 , Figure 26 to Figure 31 The bottom plate main board 141 has at least one first main board lap buckle 1415 and at least one first main board lap groove 1416 at the first main board short side 1411 and the second main board short side 1412, respectively, and the first main board lap buckle 1415 and the first main board lap groove 1416 are mutually staggered, and the bottom plate sub-plate 142 has at least one first sub-plate lap buckle 1426 and at least one first sub-plate lap groove 1427 at the sub-plate long side 1423, and the first sub-plate lap buckle 1426 and the first sub-plate lap groove 1427 are mutually staggered, wherein when the storage device 10 is in the unfolded state and the bottom plate unit 14 is unfolded, the bottom plate main board 1 The first main board docking buckle 1415 of the bottom plate sub-plate 141 is docked on the bottom plate sub-plate 142 and is received in the first sub-plate docking groove 1427 of the bottom plate sub-plate 142, and the first sub-plate docking buckle 1426 of the bottom plate sub-plate 142 is docked on the bottom plate main board 141 and is received in the first main board docking groove 1416 of the bottom plate main board 141. In this way, the trolley can prevent the bottom plate main board 141 and the bottom plate sub-plate 142 from rotating relative to each other, thereby improving the load-bearing capacity of the bottom plate unit 14 as well as the reliability and stability of the trolley. At the same time, the trolley can provide the bottom plate unit 14 with a relatively flat supporting surface.

[0106] Preferably, the bottom plate main board 141 has a first main board buckle body 14151 in the first main board docking buckle 1415, the first main board docking groove 1416 of the bottom plate main board 141 has a first main board buckle groove 14161, the bottom plate sub-plate 142 has a first sub-plate buckle body 14261 in the first sub-plate docking buckle 1426, the first sub-plate docking groove 1427 of the bottom plate sub-plate 142 has a first sub-plate buckle groove 14271, the first main board docking buckle 1415 of the bottom plate main board 141 is docked on the bottom plate sub-plate 142 and is accommodated in the first sub-plate docking groove 142 of the bottom plate sub-plate 142 The first main board buckle body 14151 of the first main board latching buckle 1415 is buckled into the first sub-board buckle groove 14271 of the bottom plate sub-board 142; correspondingly, when the first sub-board latching buckle 1426 of the bottom plate sub-board 142 is latched onto the bottom plate main board 141 and is accommodated in the first main board latching groove 1416 of the bottom plate main board 141, the first sub-board buckle body 14261 of the first sub-board latching buckle 1426 is buckled into the first main board buckle groove 14161 of the bottom plate main board 141; in this way, the trolley can further provide the load-bearing capacity of the bottom plate unit 14.

[0107] Continue to refer to the attached Figure 5 , Figure 6 , Figure 26 to Figure 33 The bottom plate sub-plate 142 has at least one second sub-plate lap buckle 1428 and at least one second sub-plate lap groove 1429 on the second sub-plate short side 1422, and the second sub-plate lap buckle 1428 and the second sub-plate lap groove 1429 are staggered with each other, wherein when the storage device 10 is in the unfolded state and the bottom plate unit 14 is unfolded, the second sub-plate lap buckle 1428 of the bottom plate sub-plate 142 of one bottom plate unit 14 is lapped on the bottom plate sub-plate of another bottom plate unit 14. 142 and is received in the second sub-plate abutting groove 1429, so that the second sub-plate short sides 1422 of the two bottom plate sub-plates 142 of one bottom plate unit 14 and the second sub-plate short sides 1422 of the two bottom plate sub-plates 142 of another bottom plate unit 14 are abutted against each other, thus, the load-bearing capacity of the bottom plate unit 14 is improved, and it is helpful to improve the reliability and stability of the trolley, and at the same time, the trolley can provide the bottom plate unit 14 with a relatively flat supporting surface.

[0108] Continue to refer to the attached Figure 5 , Figure 6 , Figure 26 to Figure 33The portion of the bottom main board 141 located between the second sub-board short sides 1422 of the two bottom sub-boards 142 has at least one second main board lap buckle 1417 and at least one second main board lap groove 1418, wherein when the storage device 10 is in the unfolded state and the bottom plate unit 14 is unfolded, the second main board lap buckle 1417 of the bottom main board 141 of one bottom plate unit 14 is lapped against the bottom main board 141 of another bottom plate unit 14 and is received in the second main board lap groove 1418 of the bottom main board 141. 418, so that the portion of the bottom plate main board 141 of one bottom plate unit 14 located at the second sub-plate short sides 1422 of the two bottom plate sub-plates 142 and the portion of the bottom plate main board 141 of another bottom plate unit 14 located at the second sub-plate short sides 1422 of the two bottom plate sub-plates 142 are overlapped with each other. In this way, the trolley can improve the load-bearing capacity of the bottom plate unit 14 as well as the reliability and stability of the trolley, and at the same time, the trolley can provide the bottom plate unit 14 with a relatively flat supporting surface.

[0109] Preferably, the second main board latching buckle 1417 of the bottom main board 141 has a second main board latching body 14171, and the second main board latching groove 1418 of the bottom main board 141 has a second main board latching groove 14181. When the second main board latching buckle 1417 of the bottom main board 141 of one bottom plate unit 14 is latched onto the bottom main board 141 of another bottom plate unit 14 and is accommodated in the second main board latching groove 1418 of this bottom main board 141, the second main board latching body 14171 of the second main board latching buckle 1417 is latched into the second main board latching groove 14181 of the other bottom main board 141. In this way, the trolley can avoid the two bottom plate units 14 from moving away from each other and prevent a gap from being generated between the two bottom plate units 14, thereby improving the load-bearing capacity of the bottom plate unit 14 and improving the reliability and stability of the trolley.

[0110] Reference Figures 7 to 25The front panel unit 11 has at least one locking protrusion 112. The rear panel unit 12 includes a rear panel body 122, a baffle 123, an unlocking plate 124, at least one leaf spring 125, at least one locking hook 126 and at least one locking spring 127, wherein the baffle 123 is installed on the inner side of the rear panel body 122, wherein the unlocking plate 124 is movably arranged between the rear panel body 122 and the baffle 123, wherein the leaf spring 125 is configured such that one end thereof remains stationary relative to the bottom edge 1221 of the rear panel body 122, and the other end thereof abuts against the bottom of the unlocking plate 124, wherein the The leaf spring 125 is used to push the unlocking plate 124 to move upward during the process of restoring the initial state, wherein the locking hook 126 is rotatably mounted on the baffle 123 and is drivably connected to the unlocking plate 124, and the locking hook 126 can hook the locking protrusion 112 of the front plate unit 11, wherein the locking spring 127 is constructed so that one end abuts against the baffle 123 and the other end abuts against the locking hook 126, and the locking spring 127 is used to keep the locking hook 126 in the position of hooking the locking protrusion 112 of the front plate unit 11. It can be understood that when the locking hook 126 of the rear panel unit 12 hooks the locking protrusion 112 of the front panel unit 11, the rear panel unit 12 locks the front panel unit 11 to prevent the front panel unit 11 and the rear panel unit 12 from moving relative to each other in an uncontrolled manner, thereby ensuring that the storage device 10 is stably maintained in the folded state. When the locking hook 126 of the rear panel unit 12 releases the locking protrusion 112 of the front panel unit 11, the rear panel unit 12 releases the front panel unit 11, and the front panel unit 11 and the rear panel unit 12 are allowed to move relative to each other, so that the storage device 10 can switch from the folded state to the unfolded state. In addition, after the storage device 10 is switched to the unfolded state, the unlocking plate 124 can be pulled out from between the rear plate body 122 and the baffle 123, and the four edges of the unlocking plate 124 can be supported by the top of the front plate unit 11, the tops of the two side plate units 13 and the top of the baffle 123, respectively, so that the unlocking plate 124 can form a lid to cover the opening of the storage cavity 100 of the storage device 10, as shown in FIG. Figure 1A shown.

[0111] In the attached Figure 1A to Figure 35In a specific example of the cart of the present invention, a locking protrusion 112 is respectively provided in the middle of the opposite sides of the front panel unit 11, and a locking hook 126 is respectively installed in the middle of the opposite sides of the baffle 123 of the rear panel unit 12, so that the two locking hooks 126 of the rear panel unit 12 can respectively hook the two locking protrusions 112 of the front panel unit 11, so that the rear panel unit 12 can reliably lock the front panel unit 11, ensuring that the storage device 10 is stably maintained in the folded state.

[0112] Preferably, the two locking hooks 126 of the rear plate unit 12 are drivably connected to the opposite sides of the unlocking plate 124, so that when the unlocking plate 124 is pushed upward by the leaf spring 125, the unlocking plate 124 can simultaneously drive the two locking hooks 126 to rotate, so that the two locking hooks 126 simultaneously release the two locking protrusions 112 of the front plate unit 11.

[0113] In the attached Figure 1A to Figure 35 In this specific example of the pulling cart of the present invention shown, the number of the leaf springs 125 of the rear plate unit 12 is two, and the two leaf springs 125 are respectively arranged on the opposite sides of the bottom of the baffle 123, so that the two leaf springs 125 can prevent the unlocking plate 124 from tilting when pushing the unlocking plate 124 to move upward.

[0114] Reference Fig. 9 , Fig.10 , Fig.17 , Fig.18 , Fig. 20 and Fig.21 The rear plate unit 12 further includes a spring seat 128, the bottom of the leaf spring 125 is mounted on the spring seat 128, and the spring seat 128 is mounted on the rear plate body 122, so that the position of the bottom of the leaf spring 125 relative to the rear plate body 122 remains unchanged. Preferably, the spring seat 128 has a seat groove 1281 and two convex ribs 1282, and the two convex ribs 1282 protrude into the seat groove 1281 at opposite sides of the seat groove 1281, respectively, the bottom of the leaf spring 125 sinks into the seat groove 1281 of the spring seat 128, and the two convex ribs 1282 of the spring seat 128 respectively extend into the gap at the bottom of the leaf spring 125, so that the bottom of the leaf spring 125 is mounted on the spring seat 128. In a specific example of the cart of the present invention, screws can be used to mount the spring seat 128 on the rear plate unit 12.

[0115] Preferably, the bottom of the unlocking plate 124 has at least one plate column 1241, and the plate column 1241 extends from the top of the leaf spring 125 to the bottom of the leaf spring 125 to avoid the top of the leaf spring 125 from being misaligned with the bottom of the unlocking plate 124, so that the top of the leaf spring 125 can be stably against the bottom of the unlocking plate 124.

[0116] Reference Fig.19 and Fig. 22 The lock hook 126 includes a lock body 1261, a pivot shaft 1262, a hook body 1263 and a driven block 1264, wherein the pivot shaft 1262 is disposed at the bottom of the lock body 1261, the hook body 1263 is disposed at the front side of the lock body 1261, the driven block 1264 is disposed at the rear side of the lock body 1261, and the driven block 1264 has a driven inclined surface 12641. Preferably, the lock hook 126 is an integrated structure.

[0117] The unlocking plate 124 has at least one driving block 1242 on its side, and the driving block 1242 has a driving inclined surface 12421. The baffle plate 123 has a pair of pivot holes 1231 and a baffle channel 1232 adjacent to the pivot holes 1231, and the baffle channel 1232 of the baffle plate 123 and the driving block 1242 of the unlocking plate 124 correspond to each other in the horizontal direction. The opposite ends of the pivot shaft 1262 of the lock hook 126 are rotatably mounted on a pair of pivot holes 1231 of the baffle 123, respectively, the driven block 1264 extends to the driving block 1242 of the unlocking plate 124 through the baffle channel 1232 of the baffle 123, and the driven inclined surface 12641 of the driven block 1264 is attached to the driving inclined surface 12421 of the driving block 1242, and the end of the lock spring 127 is against the bottom of the hook body 1263 of the lock hook 126.

[0118] Preferably, the locking hook 126 further includes a locking column 1265, which is arranged at the bottom of the hook body 1263. The locking column 1265 extends from one end of the locking spring 127 to the inside of the locking spring 127 to prevent this end of the locking spring 127 from sliding relative to the hook body 1263, so that the end of the locking spring 127 can be stably pressed against the hook body 1263.

[0119] Preferably, the side of the baffle 123 has at least one receiving hole 1233, and the receiving hole 1233 is located behind the hook body 1263 of the lock hook 126, and one end of the lock spring 127 is received in the receiving hole 1233 of the baffle 123, so that this end of the lock spring 127 can stably abut against the baffle 123 to prevent this end of the lock spring 127 from sliding relative to the baffle 123.

[0120] Continue to refer to the attached Figure 7 and Figure 8 The rear plate unit 12 further includes a blocking portion 129, which is arranged at the top of the unlocking plate 124, wherein the blocking portion 129 can be blocked or released by the top edge 1222 of the rear plate body 122. When the blocking portion 129 is blocked by the top edge 1222 of the rear plate body 122, the unlocking plate 124 and the rear plate body 122 cooperate with each other to make the leaf spring 125 in a compressed state and the unlocking plate 124 is prevented from moving upward relative to the rear plate body 122. When the blocking portion 129 is released by the top edge 1222 of the rear plate body 122, the leaf spring 125 pushes the unlocking plate 124 to move upward in the process of restoring the initial state.

[0121] In a specific example of the trolley of the present invention, the obstructed portion 129 can be released by the top edge 1222 of the rear plate body 122 by pushing the obstructed portion 129 toward the baffle 123. Figure 3 , Figure 7 and Figure 8 The rear panel body 122 has an operating channel 1223, and the portion of the unlocking plate 124 adjacent to the obstructed portion 129 corresponds to the operating channel 1223 of the rear panel body 122. When the user applies a thrust to the top of the unlocking plate 124 through the operating channel 1223 of the rear panel body 122 to move or deform toward the direction close to the baffle 123, the unlocking plate 124 drives the obstructed portion 129 to move toward the direction close to the baffle 123, thereby causing the top edge 1222 of the rear panel body 122 to release the obstructed portion 129. Optionally, in other specific examples of the pulling cart of the present invention, the obstructed portion 129 may also be directly aligned with the operating channel 1223 of the rear panel body 122, so that the user can directly apply a thrust to the obstructed portion 129 through the operating channel 1223 of the rear panel body 122, so that the obstructed portion 129 can move toward the direction of the baffle 123 and be released by the top edge 1222 of the rear panel body 122.

[0122] It can be understood that since the obstructed portion 129 can only be operated through the operating channel 1223 of the rear panel body 122, when the user normally carries or transports the storage device 10 in the folded state, the storage device 10 can be stably maintained in the folded state.

[0123] It is worth mentioning that the specific manner in which the obstruction portion 129 is disposed on the top of the unlocking plate 124 is not limited in the trolley of the present invention. Figure 1A to Figure 35 In the specific example of the pulling cart shown, the obstructed portion 129 is fixedly mounted on the top of the unlocking plate 124. Optionally, in other specific examples of the pulling cart of the present invention, the obstructed portion 129 and the unlocking plate 124 are an integrated structure.

[0124] Reference Figure 1A and Figure 1B When the storage device 10 is in the unfolded state, each of the side panel units 13 and each of the bottom panel units 14 are unfolded, so that the front panel unit 11, the rear panel unit 12, each of the side panel units 13 and each of the bottom panel units 14 surround and form the storage cavity 100. At this time, the hook body 1263 of the locking hook 126 is located in the avoidance groove 1326 of the second side panel 132 of the side panel unit 13, and the main board long side 1413 of the bottom panel main board 141 of one of the bottom panel units 14 is overlapped with the bottom of the front panel unit 11, and the main board long side 1413 of the bottom panel main board 141 of the other bottom panel unit 14 is overlapped with the bottom of the rear panel unit 12, and the first main board overlap buckle 1415 of the bottom panel main board 141 is overlapped with the The bottom plate sub-plate 142 is accommodated in the first sub-plate docking groove 1427 of the bottom plate sub-plate 142, the first sub-plate docking buckle 1426 of the bottom plate sub-plate 142 is docked on the bottom plate main plate 141 and is accommodated in the first main plate docking groove 1416 of the bottom plate main plate 141, the second sub-plate docking buckle 1428 of the bottom plate sub-plate 142 of one bottom plate unit 14 is docked on the bottom plate sub-plate 142 of another bottom plate unit 14 and is accommodated in the second sub-plate docking groove 1429, the second main plate docking buckle 1417 of the bottom plate main plate 141 of one bottom plate unit 14 is docked on the bottom plate main plate 141 of another bottom plate unit 14 and is accommodated in the second main plate docking groove 1418 of this bottom plate main plate 141.

[0125] Reference Figure 3 , Figure 4 , Figure 7 , Fig. 9 and Fig.11When the storage device 10 is in the folded state, each of the side panel units 13 and each of the bottom panel units 14 are folded and clamped between the front panel unit 11 and the rear panel unit 12, the obstructed portion 129 is blocked by the top edge 1222 of the rear panel body 122, the unlocking plate 124 and the bottom edge 1221 of the rear panel body 122 compress the leaf spring 125 to keep it in a compressed state, and the hook body 1263 of the lock hook 126 hooks the lock protrusion 112 of the front panel unit 11.

[0126] The process of switching the storage device 10 from the unfolded state to the folded state is as follows: pushing the middle portion of the side panel unit 13 toward the storage cavity 100 of the storage device 10, so that the first side panel 131 and the second side panel 132 rotate around the rotation axis of the first side panel 131 and the second side panel 132 to fold the side panel unit 13 inwardly; at the same time, the first side panel 131 and the front panel unit 11 rotate around the rotation axis of the first side panel 131 and the front panel unit 11, and the second side panel 132 and the rear panel unit 12 rotate around the rotation axis of the second side panel 132 and the rear panel unit 12. The bottom plate sub-plate 142 and the bottom plate main plate 141 of the bottom plate unit 14 rotate around the rotation axis (folding axis) of the bottom plate sub-plate 142 and the bottom plate main plate 141 so that the bottom plate unit 14 is folded upward, the bottom plate sub-plate 142 and the first side plate 131 of one bottom plate unit 14 rotate around the rotation axis of the bottom plate sub-plate 142 and the first side plate 131, and the bottom plate sub-plate 142 and the second side plate 132 of the other bottom plate unit 14 rotate around the rotation axis of the bottom plate sub-plate 142 and the second side plate 132, and the front plate unit 11 and the rear plate unit 12 approach each other. When the front panel unit 11 is stacked on the rear panel unit 12, the hook body 1263 of the locking hook 126 hooks the locking protrusion 112 of the front panel unit 11, so that the rear panel unit 12 locks the front panel unit 11, thereby keeping the storage device 10 in the folded state.

[0127] The process of switching the storage device 10 from the folded state to the unfolded state is: applying a thrust to the top of the unlocking plate 124 through the operating channel 1223 of the rear plate body 122, so that the top of the unlocking plate 124 moves or deforms in the direction close to the baffle 123, and the unlocking plate 124 drives the obstructed portion 129 to move in the direction close to the baffle 123, so that the top edge 1222 of the rear plate body 122 releases the obstructed portion 129, and then the leaf spring 125 pushes the unlocking plate 124 to move upward in the process of restoring the initial state, and the driving block 1242 of the unlocking plate 124 and the driven block 1264 of the locking hook 126 cooperate with each other, so that the locking hook 126 rotates to allow the hook body 1263 of the locking hook 126 to disengage from the locking protrusion 112 of the front plate unit 11, and at this time, the rear plate unit 12 releases the front plate unit 11. Subsequently, when the front panel unit 11 and the rear panel unit 12 are pulled away from each other, each of the side panel units 13 and each of the bottom panel units 14 are unfolded to allow the storage device 10 to switch to the unfolded state.

[0128] Attached Figure 36 to Figure 49 is a modified example of the pull cart according to the present invention, and is similar to Figures 1 to Fig.35 The trolley shown is different in that the attached Figure 36 to Figure 49The rear plate unit 12 of the storage device 10 of the cart shown in the figure comprises a rear plate body 122A, a baffle plate 123A, an unlocking plate 124A, at least one leaf spring 125A, at least one locking hook 126A and at least one locking spring 127A, wherein the baffle plate 123A is installed on the inner side of the rear plate body 122A, wherein the unlocking plate 124A is movably arranged between the rear plate body 122A and the baffle plate 123A, wherein the leaf spring 125A is configured such that one end of the leaf spring 125A is relative to the bottom edge of the rear plate body 122A. 221A remains stationary, and the other end abuts against the bottom of the unlocking plate 124A, and the leaf spring 125A is used to push the unlocking plate 124A to move upward during the process of restoring to the initial state, wherein the locking hook 126A can hook the locking protrusion 112 of the front plate unit 11, wherein the locking spring 127A is constructed with one end abutting against the baffle 123A and the other end abutting against the locking hook 126A, and the locking spring 127A is used to keep the locking hook 126A in the position of hooking the locking protrusion 112 of the front plate unit 11. It can be understood that when the locking hook 126A of the rear panel unit 12 hooks the locking protrusion 112 of the front panel unit 11, the rear panel unit 12 locks the front panel unit 11 to prevent the front panel unit 11 and the rear panel unit 12 from moving relative to each other in an uncontrolled manner, thereby ensuring that the storage device 10 is stably maintained in the folded state. When the locking hook 126A of the rear panel unit 12 releases the locking protrusion 112 of the front panel unit 11, the rear panel unit 12 releases the front panel unit 11, and the front panel unit 11 and the rear panel unit 12 are allowed to move relative to each other, so that the storage device 10 can switch from the folded state to the unfolded state. In addition, after the storage device 10 is switched to the expanded state, the unlocking plate 124A can be pulled out from between the rear panel body 122A and the baffle 123A, and the four edges of the unlocking plate 124A can be supported by the top of the front panel unit 11, the top of the two side panel units 13 and the top of the baffle 123A, respectively, so that the unlocking plate 124A can form a cover to cover the opening of the storage cavity 100 of the storage device 10.

[0129] In a specific example of the cart of the present invention, a locking hook 126A is respectively installed in the middle of the opposite sides of the baffle 123A of the rear panel unit 12, so that the two locking hooks 126A of the rear panel unit 12 can respectively hook the two locking protrusions 112 on the opposite sides of the front panel unit 11, so that the rear panel unit 12 can reliably lock the front panel unit 11, ensuring that the storage device 10 is stably maintained in the folded state.

[0130] Preferably, the two locking hooks 126A of the rear plate unit 12 are drivably connected to the opposite sides of the unlocking plate 124A, so that when the unlocking plate 124A is pushed upward by the leaf spring 125A, the unlocking plate 124A can simultaneously drive the two locking hooks 126A to rotate, so that the two locking hooks 126A simultaneously release the two locking protrusions 112 of the front plate unit 11.

[0131] In the attached Figure 36 to Figure 49 In this specific example of the pulling cart of the present invention shown, the number of the leaf springs 125A of the rear plate unit 12 is two, and the two leaf springs 125A are respectively arranged on the opposite sides of the bottom of the baffle 123A, so that the two leaf springs 125A can prevent the unlocking plate 124A from tilting when pushing the unlocking plate 124A to move upward.

[0132] Reference Fig.39 , Fig.40 and Fig.42 The rear plate unit 12 further includes a spring seat 128A, the spring seat 128A includes a fixed seat 1283A and a movable seat 1284A mounted on the fixed seat 1283A so as to be movable up and down, the fixed seat 1283A is fixedly mounted on the rear plate body 122A, the top of the movable seat 1284A can abut against the bottom of the unlocking plate 124A, and the bottom of the leaf spring 125A abuts against the bottom edge 1221A of the rear plate body 122A. In this way, the leaf spring 125A is constructed so that its bottom remains stationary relative to the bottom edge 1221A of the rear plate body 122A, and the top of the leaf spring 125A abuts against the movable seat 1284A. In this way, the leaf spring 125A is constructed so that its top abuts against the bottom of the unlocking plate 124A, and the fixed seat 1283A and the movable seat 1284A hide the leaf spring 125A to prevent debris from getting stuck in the leaf spring 125A and causing the leaf spring 125A to fail.

[0133] Continue to refer to the attached Fig.39 , Fig.40 and Fig.42The fixed seat 1283A includes a seat tube 12831A and a locking arm 12832A extending outward from the seat tube 12831A, the seat tube 12831A has an active cavity 128311A, a bottom opening 128312A, a top opening 128313A and at least one limiting groove 128314A, the bottom opening 128312A and the top opening 128313A are respectively formed at the active cavity 128311A The bottom and top, the limiting groove 128314A is connected to the movable cavity 128311A and extends from the bottom opening 128312A to the top opening 128313A, wherein the locking arm 12832A is locked to the rear plate body 122A, for example, a screw can be used to lock the locking arm 12832A to the rear plate body 122A, so as to be fixedly installed on the fixed seat 1283A to the rear plate body 122A. The movable seat 1284A includes a seat body 12841A and at least one limiting arm 12842A extending from the bottom of the seat body 12841A to the side direction, and the seat body 12841A has a first spring groove 128411A. The movable seat 1284A is installed in the movable cavity 128311A of the seat cylinder 12831A through the bottom opening 128312A of the seat cylinder 12831A, and the top of the seat body 12841A can extend to the outside of the seat cylinder 12831A through the top opening 128313A of the seat cylinder 12831A. The limiting arm 12842A of the movable seat 1284A is slidably arranged on the seat cylinder 12831A. The limiting groove 128314A, the top of the leaf spring 125A is accommodated in the first spring groove 128411A of the seat body 12841A, so that the bottom of the leaf spring 125A can reliably abut against the bottom edge 1221A of the rear plate body 122A, and the leaf spring 125A is hidden between the fixed seat 1283A and the movable seat 1284A to prevent debris from getting stuck in the leaf spring 125A and causing the leaf spring 125A to fail.

[0134] Since the limiting arm 12842A of the movable seat 1284A is slidably disposed in the limiting groove 128314A of the seat tube 12831A, the movable seat 1284A will not rotate during the process of moving up and down relative to the fixed seat 1283A, and the movable seat 1284A will not separate from the fixed seat 1283A, so as to ensure the reliability of the rear plate unit 12.

[0135] Preferably, continue to refer to the attached Fig.39 and Fig.40The seat cylinder 12831A has two limiting grooves 128314A, which are symmetrically arranged on the opposite sides of the movable cavity 128311A. Correspondingly, the movable seat 1284A includes two limiting arms 12842A, which are symmetrically arranged on the opposite sides of the bottom of the seat body 12841A, wherein the two limiting arms 12842A of the movable seat 1284A are respectively slidably arranged in the two limiting grooves 128314A of the seat cylinder 12831A.

[0136] Reference Fig.37 and Fig.38 The lock hook 126A includes a lock body 1261A, a pivot shaft 1262A, a hook body 1263A and a driven block 1264A, wherein the pivot shaft 1262A is disposed at the bottom of the lock body 1261A, the hook body 1263A is disposed at the front side of the lock body 1261A, the driven block 1264A is disposed at the rear side of the lock body 1261A, and the driven block 1264A has a driven inclined surface 12641A. Preferably, the lock hook 126A is an integrated structure.

[0137] The unlocking plate 124A has at least one driving block 1242A on its side, and the driving block 1242A has a driving inclined surface 12421A. The baffle plate 123A has a first pivot hole 1231A and a baffle channel 1232A adjacent to the first pivot hole 1231A, and the baffle channel 1232A of the baffle plate 123A and the driving block 1242A of the unlocking plate 124A correspond to each other in the horizontal direction. The rear plate body 122A has a second pivot hole 1224A, and the first pivot hole 1231A of the baffle plate 123A and the second pivot hole 1224A of the rear plate body 122A correspond to each other in the horizontal direction, wherein the two opposite sides of the pivot axis 1262A of the locking hook 126A The two ends are rotatably mounted on the first pivot hole 1231A of the baffle 123A and the second pivot hole 1224A of the rear plate body 122A, respectively, the driven block 1264A extends to the driving block 1242A of the unlocking plate 124A through the baffle channel 1232A of the baffle 123A, and the driven inclined surface 12641A of the driven block 1264A is attached to the driving inclined surface 12421A of the driving block 1242A, and the end of the locking spring 127A abuts against the bottom of the hook body 1263A of the locking hook 126A.

[0138] Preferably, the locking hook 126A further includes a locking column 1265A, which is arranged at the bottom of the hook body 1263A. The locking column 1265A extends from one end of the locking spring 127A to the inside of the locking spring 127A to prevent this end of the locking spring 127A from sliding relative to the hook body 1263A, so that the end of the locking spring 127A can be stably pressed against the hook body 1263A.

[0139] Preferably, the side of the baffle 123A has at least one receiving hole 1233A, and the receiving hole 1233A is located behind the hook body 1263A of the lock hook 126A, and one end of the lock spring 127A is received in the receiving hole 1233A of the baffle 123A, so that this end of the lock spring 127A can stably abut against the baffle 123A to prevent this end of the lock spring 127A from sliding relative to the baffle 123A.

[0140] Reference Figure 43 to Figure 49 The storage device 10 further includes a locking unit 16A. When the unlocking plate 124A is located between the rear plate body 122A and the baffle 123A and the unlocking plate 124A and the rear plate body 122A cooperate with each other to make the leaf spring 125A in a compressed state, the locking unit 16A locks the unlocking plate 124A to prevent the unlocking plate 124A from moving upward relative to the rear plate body 122A. When the locking unit 16A releases the unlocking plate 124A, the leaf spring 125A pushes the unlocking plate 124A to move upward in the process of restoring the initial state.

[0141] In the attached Figure 36 to Figure 49 In the specific example of the pulling cart of the present invention shown, the locking unit 16A is operably provided on the rear plate body 122A, wherein the locking unit 16A is used to lock or release the unlocking plate 124A. Specifically, the locking unit 16A is operably provided on the bottom of the rear plate body 122A, wherein the locking unit 16A is used to lock or release the bottom of the unlocking plate 124A.

[0142] Specifically, the bottom of the unlocking plate 124A has a locking groove 1243A, the rear plate body 122A has an operating channel 1223A, and the locking unit 16A includes an operating portion 161A and a reset portion 162A. The operating portion 161A is operably mounted on the rear plate body 122A and corresponds to the operating channel 1223A. The reset portion 162A is arranged between the operating portion 161A and the rear plate body 122A, and is used to reset the operating portion 161A after being operated. The operating portion 161A has a locking member 1611A, and the locking member 1611A of the operating portion 161A can be extended in or out. The locking groove 1243A of the unlocking plate 124A, wherein when the locking piece 1611A of the operating part 161A extends into the locking groove 1243A of the unlocking plate 124A, the locking unit 16A locks the unlocking plate 124A to prevent the unlocking plate 124A from moving upward relative to the rear plate body 122A, and accordingly, when the locking piece 1611A of the operating part 161A withdraws from the locking groove 1243A of the unlocking plate 124A, the locking unit 16A releases the unlocking plate 124A, and the leaf spring 125A pushes the unlocking plate 124A to move upward in the process of restoring the initial state.

[0143] Preferably, the operating part 161A is rotatably mounted on the rear plate body 122A. When the operating part 161A is not driven to rotate, the reset part 162A makes the locking member 1611A of the operating part 161A extend into the locking groove 1243A of the unlocking plate 124A. When the operating part 161A is driven to rotate, the locking member 1611A of the operating part 161A withdraws from the locking groove 1243A of the unlocking plate 124A and the reset part 162A is deformed. The specific type of the reset part 162A is not limited in the trolley of the present invention, and it can be a compression spring or a torsion spring. More preferably, the operating part 161A is located in the operating channel 1223A of the rear plate body 122A.

[0144] Furthermore, the operating portion 161A has a force-bearing portion 1612A, and the user can apply force to the operating portion 161A through the force-bearing portion 1612A to make the operating portion 161A rotate relative to the rear panel body 122A. Preferably, the user can use the foot to apply force to the force-bearing portion 1612A of the operating portion 161A to drive the operating portion 161A to rotate relative to the rear panel body 122A.

[0145] Furthermore, the operating portion 161A has a second spring groove 1613A, and the bottom of the reset portion 162A is received in the second spring groove 1613A of the operating portion 161A, so that the reset portion 162A is reliably disposed between the operating portion 161A and the rear plate body 122A.

[0146] When the storage device 10 is in the unfolded state, each of the side panel units 13 and each of the bottom panel units 14 are unfolded, so that the front panel unit 11, the rear panel unit 12, each of the side panel units 13 and each of the bottom panel units 14 surround and form the storage cavity 100. At this time, the hook body 1263A of the locking hook 126A is located in the avoidance groove 1326 of the second side panel 132 of the side panel unit 13, the main board long side 1413 of the bottom panel main board 141 of one of the bottom panel units 14 is overlapped with the bottom of the front panel unit 11, the main board long side 1413 of the bottom panel main board 141 of the other bottom panel unit 14 is overlapped with the bottom of the rear panel unit 12, and the first main board overlap buckle 1415 of the bottom panel main board 141 is overlapped with The bottom plate sub-plate 142 is accommodated in the first sub-plate docking groove 1427 of the bottom plate sub-plate 142, the first sub-plate docking buckle 1426 of the bottom plate sub-plate 142 is docked on the bottom plate main plate 141 and is accommodated in the first main plate docking groove 1416 of the bottom plate main plate 141, the second sub-plate docking buckle 1428 of the bottom plate sub-plate 142 of one bottom plate unit 14 is docked on the bottom plate sub-plate 142 of another bottom plate unit 14 and is accommodated in the second sub-plate docking groove 1429, the second main plate docking buckle 1417 of the bottom plate main plate 141 of one bottom plate unit 14 is docked on the bottom plate main plate 141 of another bottom plate unit 14 and is accommodated in the second main plate docking groove 1418 of this bottom plate main plate 141.

[0147] When the storage device 10 is in the folded state, each of the side panel units 13 and each of the bottom panel units 14 are folded and clamped between the front panel unit 11 and the rear panel unit 12, the obstructed portion 129 is blocked by the top edge 1222 of the rear panel body 122A, the unlocking plate 124A and the bottom edge 1221 of the rear panel body 122A compress the leaf spring 125A to keep it in a compressed state, and the hook body 1263A of the lock hook 126A hooks the lock protrusion 112 of the front panel unit 11.

[0148] The process of switching the storage device 10 from the unfolded state to the folded state is as follows: pushing the middle portion of the side panel unit 13 toward the storage cavity 100 of the storage device 10, so that the first side panel 131 and the second side panel 132 rotate around the rotation axis of the first side panel 131 and the second side panel 132 to fold the side panel unit 13 inwardly; at the same time, the first side panel 131 and the front panel unit 11 rotate around the rotation axis of the first side panel 131 and the front panel unit 11, and the second side panel 132 and the rear panel unit 12 rotate around the rotation axis of the second side panel 132 and the rear panel unit 12. The bottom plate sub-plate 142 and the bottom plate main plate 141 of the bottom plate unit 14 rotate around the rotation axis (folding axis) of the bottom plate sub-plate 142 and the bottom plate main plate 141 so that the bottom plate unit 14 is folded upward, the bottom plate sub-plate 142 and the first side plate 131 of one bottom plate unit 14 rotate around the rotation axis of the bottom plate sub-plate 142 and the first side plate 131, and the bottom plate sub-plate 142 and the second side plate 132 of the other bottom plate unit 14 rotate around the rotation axis of the bottom plate sub-plate 142 and the second side plate 132, and the front plate unit 11 and the rear plate unit 12 approach each other. When the front panel unit 11 is stacked on the rear panel unit 12, the hook body 1263A of the locking hook 126A hooks the locking protrusion 112 of the front panel unit 11, so that the rear panel unit 12 locks the front panel unit 11, thereby keeping the storage device 10 in the folded state.

[0149] The process of switching the storage device 10 from the folded state to the unfolded state is: use the foot to apply force to the force-bearing part 1612A of the operating part 161A to drive the operating part 161A to rotate relative to the rear plate body 122A, so that the locking piece 1611A of the operating part 161A withdraws from the locking groove 1241A of the unlocking plate 124A, at this time, the locking unit 16A releases the unlocking plate 124A, and then the leaf spring 125A pushes the unlocking plate 124A to move upward in the process of restoring the initial state, and the driving block 1242A of the unlocking plate 124A and the driven block 1264A of the locking hook 126A cooperate with each other, so that the locking hook 126A rotates and allows the hook body 1263A of the locking hook 126A to disengage from the locking protrusion 112 of the front plate unit 11, and at this time, the rear plate unit 12 releases the front plate unit 11. Subsequently, when the front panel unit 11 and the rear panel unit 12 are pulled away from each other, each of the side panel units 13 and each of the bottom panel units 14 are unfolded to allow the storage device 10 to switch to the unfolded state.

[0150] It should be understood by those skilled in the art that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be modified or altered in any way without departing from the principles.

Claims

1. A foldable storage device, characterized in that: include: a front panel unit; a rear panel unit, wherein the rear panel unit and the front panel unit are arranged face to face; Two side panel units, wherein the middle portion of the side panel units can be folded inward, wherein two opposite sides of one of the side panel units are rotatably mounted on one side of the front panel unit and one side of the rear panel unit, and two opposite sides of the other side panel unit are rotatably mounted on the other side of the front panel unit and the other side of the rear panel unit; and Two bottom plate units, wherein the opposite ends of the bottom plate units can be folded upwards, wherein the opposite ends of one of the bottom plate units are rotatably mounted on one end of the two side plate units at the bottom of the side plate unit, and the opposite ends of the other bottom plate unit are rotatably mounted on the other end of the two side plate units at the bottom of the side plate unit, wherein an acute angle is formed between the folding axis of the bottom plate unit and the rotation axis of the bottom plate unit and the side plate unit.

2. The storage device according to claim 1, wherein the bottom plate unit includes a triangular bottom plate main plate and two triangular bottom plate sub-plates, the bottom plate main plate having a first main plate short side, a second main plate short side and a main plate long side, the bottom plate sub-plate having a first sub-plate short side, a second sub-plate short side and a sub-plate long side, the sub-plate long side of one of the bottom plate sub-plates and the first main plate short side of the bottom plate main plate are axially connected to form a folding axis of the bottom plate unit, the sub-plate long side of another of the bottom plate sub-plates and the second main plate short side of the bottom plate main plate are axially connected to form another folding axis of the bottom plate unit, the first sub-plate short sides of two of the bottom plate sub-plates of one of the bottom plate units and one end of two of the side plate units are axially connected to form a rotation axis of the bottom plate unit and the side plate unit, the first sub-plate short sides of two of the bottom plate sub-plates of another of the bottom plate units and the other end of two of the side plate units are axially connected to form a rotation axis of the bottom plate unit and the side plate unit.

3. The storage device according to claim 2, wherein after the bottom plate unit is unfolded, the connection position between the bottom plate main plate and the bottom plate sub-plate bulges upward.

4. The storage device according to claim 2, wherein after the bottom plate unit is unfolded, an angle α is formed between the top surface of the bottom plate main plate and the top surface of the bottom plate sub-plate, and an angle β is formed between the bottom surface of the bottom plate main plate and the bottom surface of the bottom plate sub-plate, wherein the angle α is greater than 180° and the angle β is less than 180°.

5. The storage device according to any one of claims 1 to 4, wherein the front plate unit has at least one locking protrusion, and the rear plate unit includes a rear plate body, a baffle, an unlocking plate, at least one leaf spring, at least one locking hook and at least one locking spring, the baffle being mounted on the inner side of the rear plate body, the unlocking plate being movably arranged between the rear plate body and the baffle, the leaf spring being constructed so that one end thereof remains stationary relative to the bottom edge of the rear plate body and the other end thereof abuts against the bottom of the unlocking plate, the locking hook being rotatably mounted on the baffle and drivably connected to the unlocking plate, the locking hook being able to hook the locking protrusion of the front plate unit, and the locking spring being constructed so that one end thereof abuts against the baffle and the other end thereof abuts against the locking hook.

6. The storage device according to claim 5, wherein the lock hook comprises a lock body, a pivot shaft, a hook body and a driven block, the pivot shaft is arranged at the bottom of the lock body, the hook body is arranged at the front side of the lock body, the driven block is arranged at the rear side of the lock body, the driven block has a driven inclined surface, wherein the side of the unlocking plate has at least one driving block, the driving block has a driving inclined surface, wherein the baffle plate has a pair of pivot holes and a baffle channel adjacent to the pivot holes, the baffle channel of the baffle plate and the driving block of the unlocking plate correspond in the horizontal direction, wherein the opposite ends of the pivot shaft of the lock hook are respectively rotatably mounted on the pair of pivot holes of the baffle plate, the driven block extends to the driving block of the unlocking plate through the baffle channel of the baffle plate, and the driven inclined surface of the driven block is in contact with the driving inclined surface of the driving block, and the end of the lock spring abuts against the bottom of the hook body.

7. The storage device according to claim 6, wherein the rear plate unit includes an obstruction portion, which is arranged at the top of the unlocking plate, and the obstruction portion can be blocked or released by the top edge of the rear plate body. When the obstruction portion is blocked by the top edge of the rear plate body, the unlocking plate and the rear plate body cause the leaf spring to be in a compressed state. When the obstruction portion is released by the top edge of the rear plate body, the leaf spring pushes the unlocking plate to move upward, so that the driving block and the driven block cooperate with each other to drive the lock hook to rotate.

8. The storage device according to claim 7, wherein the rear panel body has an operating channel, a portion of the unlocking plate adjacent to the obstructed portion corresponds to the operating channel of the rear panel body, or the obstructed portion corresponds to the operating channel of the rear panel body.

9. The storage device according to claim 5, wherein the lock hook comprises a lock body, a pivot shaft, a hook body and a driven block, the pivot shaft is arranged at the bottom of the lock body, the hook body is arranged at the front side of the lock body, the driven block is arranged at the rear side of the lock body, the driven block has a driven inclined surface, wherein the side of the unlocking plate has at least one driving block, the driving block has a driving inclined surface, wherein the baffle plate has a first pivot hole and a baffle plate channel adjacent to the first pivot hole, the baffle plate channel of the baffle plate and the driving block of the unlocking plate Corresponding in the horizontal direction, the rear plate body has a second pivot hole, and the second pivot hole of the rear plate body and the first pivot hole of the baffle plate correspond in the horizontal direction, wherein the opposite ends of the pivot axis of the lock hook are rotatably mounted on the first pivot hole of the baffle plate and the second pivot hole of the rear plate body, respectively, the driven block extends to the driving block of the unlocking plate through the baffle channel of the baffle plate, and the driven inclined surface of the driven block is fitted with the driving inclined surface of the driving block, and the end of the locking spring abuts against the bottom of the hook body.

10. The storage device according to claim 5, wherein the rear plate unit includes a spring seat, the spring seat includes a fixed seat and a movable seat mounted on the fixed seat so as to be movably mounted up and down, the fixed seat is fixedly mounted on the rear plate body, the top of the movable seat can abut against the bottom of the unlocking plate, the bottom of the leaf spring abuts against the bottom edge of the rear plate body, and the top of the leaf spring abuts against the movable seat.

11. The storage device of claim 10, wherein the fixed seat includes a seat tube and a locking arm extending outward from the seat tube, the locking arm being locked to the rear plate body, the seat tube having an active cavity, a bottom opening, a top opening and at least one limiting groove, the bottom opening and the top opening being respectively formed at the bottom and the top of the active cavity, the limiting groove being connected to the active cavity and extending from the bottom opening to the top opening direction, wherein the movable seat includes a seat body and at least one limiting arm extending laterally from the bottom of the seat body, the seat body having a first spring groove, the movable seat being installed in the active cavity of the seat tube through the bottom opening of the seat tube, the top of the seat body being able to extend to the outside of the seat tube through the top opening of the seat tube, the limiting arm of the movable seat being slidably arranged in the limiting groove of the seat tube, and the top of the leaf spring being accommodated in the first spring groove of the seat body. 12 . The storage device according to claim 9 , wherein the storage device comprises a locking unit, the locking unit is operably provided on the rear plate body, and the locking unit is configured to lock or release the unlocking plate.

13. The storage device according to claim 12, wherein the unlocking plate has a locking groove, the rear plate body has an operating channel, the locking unit includes an operating part and a reset part, the operating part is operably installed on the rear plate body and corresponds to the operating channel, the reset part is arranged between the operating part and the rear plate body, and is used to reset the operating part after being operated, the operating part has a locking piece, the locking piece of the operating part is arranged to be able to extend into or withdraw from the locking groove of the unlocking plate, when the locking piece extends into the locking groove of the unlocking plate, the locking unit locks the unlocking plate, and when the locking piece withdraws from the locking groove of the unlocking plate, the locking unit releases the unlocking plate.

14. The storage device according to claim 13, wherein the operating portion is rotatably mounted on the bottom of the rear plate body.

15. A foldable storage device, characterized in that: It includes a front plate unit, a rear plate unit, two side plate units and two bottom plate units and has an unfolded state and a folded state; Each of the side plate units comprises a first side plate and a second side plate, one side of the first side plate is connected to one side of the second side plate by an axis, the other side of the first side plate is connected to one side of the front plate unit by an axis, and the other side of the second side plate is connected to one side of the rear plate unit by an axis; Each of the bottom plate units comprises a triangular bottom plate main board and two triangular bottom plate sub-boards, the bottom plate main board having a first main board short side, a second main board short side and a main board long side, the bottom plate sub-board having a first sub-board short side, a second sub-board short side and a sub-board long side, the sub-board long sides of the two bottom plate sub-boards are respectively connected to the first main board short side and the second main board short side of the bottom plate main board by an axis, the first sub-board short sides of the two bottom plate sub-boards of one of the bottom plate units are respectively connected to the bottom of the first side plates of the two side plate units by an axis, and the first sub-board short sides of the two bottom plate sub-boards of the other bottom plate unit are respectively connected to the bottom of the second side plates of the two side plate units by an axis, when the first side plate and the second side plate rotate relative to each other, the bottom plate sub-board rotates synchronously relative to the bottom plate main board and the first side plate or the second side plate, so that the storage device can switch between the state and the folded state.

16. The storage device according to claim 15, wherein when the storage device is in the unfolded state, a connection position between the bottom plate main plate and the bottom plate sub-plate bulges upward.

17. A storage device according to claim 15, wherein when the storage device is in the expanded state, an angle α is formed between the top surface of the bottom plate main plate and the top surface of the bottom plate sub-plate, and an angle β is formed between the bottom surface of the bottom plate main plate and the bottom surface of the bottom plate sub-plate, wherein the angle α is greater than 180° and the angle β is less than 180°.

18. The storage device according to claim 15, wherein when the storage device is in the unfolded state, the long side of the main board of the bottom plate main board of one bottom plate unit rests on the bottom of the front plate unit, the long side of the main board of the bottom plate main board of another bottom plate unit rests on the bottom of the rear plate unit, and the short sides of the second sub-plates of each of the bottom plate sub-plates of one bottom plate unit and the short sides of the second sub-plates of each of the bottom plate sub-plates of another bottom plate unit rest on each other.

19. The storage device according to claim 18, wherein the bottom plate main board has at least one first main board latching buckle and at least one first main board latching groove on the first main board short side and the second main board short side respectively, the first main board latching buckle and the first main board latching groove are offset from each other, the bottom plate sub-plate has at least one first sub-plate latching buckle and at least one first sub-plate latching groove on the sub-plate long side, the first sub-plate latching buckle and the first sub-plate latching groove are offset from each other, wherein when the storage device is in the unfolded state, the first main board latching buckle of the bottom plate main board latches against the bottom plate sub-plate and is accommodated in the first sub-plate latching groove of the bottom plate sub-plate, and the first sub-plate latching buckle of the bottom plate sub-plate latches against the bottom plate main board and is accommodated in the first main board latching groove of the bottom plate main board.

20. The storage device according to claim 19, wherein the first main board latching buckle of the bottom plate main board has a first main board latching body, the first main board latching groove of the bottom plate main board has a first main board latching groove, the first sub-board latching buckle of the bottom plate sub-board has a first sub-board latching body, the first sub-board latching groove of the bottom plate sub-board has a first sub-board latching groove, the first main board latching body of the first main board latching buckle can be buckled into the first sub-board latching groove of the bottom plate sub-board, and the first sub-board latching body of the first sub-board latching buckle can be buckled into the first main board latching groove of the bottom plate main board.

21. The storage device according to claim 19, wherein the bottom panel sub-panel has at least one second sub-panel latching buckle and at least one second sub-panel latching groove on the short side of the second sub-panel, the second sub-panel latching buckle and the second sub-panel latching groove are offset from each other, wherein when the storage device is in the unfolded state, the second sub-panel latching buckle of one bottom panel sub-panel latches against another bottom panel sub-panel and is accommodated in the second sub-panel latching groove of this bottom panel sub-panel.

22. The storage device according to claim 15, wherein a portion of the bottom plate main board located between the short sides of the second sub-boards of the two bottom plate sub-boards has at least one second main board docking buckle and at least one second main board docking groove, wherein when the storage device is in the unfolded state, the second main board docking buckle of the bottom plate main board of one bottom plate unit docks against another bottom plate main board and is accommodated in the second main board docking groove of this bottom plate main board.

23. The storage device according to claim 22, wherein the second main board latching buckle of the bottom main board has a second main board latching body, the second main board latching groove of the bottom main board has a second main board latching groove, and the second main board latching body of the second main board latching buckle of one bottom main board can be latched into the second main board latching groove of the second main board latching groove of another bottom main board.

24. The storage device according to any one of claims 15 to 13, wherein the front plate unit has at least one locking protrusion, and the rear plate unit includes a rear plate body, a baffle, an unlocking plate, at least one leaf spring, at least one locking hook and at least one locking spring, the baffle being installed on the inner side of the rear plate body, the unlocking plate being movably arranged between the rear plate body and the baffle, the leaf spring being constructed so that one end thereof remains stationary relative to the bottom edge of the rear plate body and the other end thereof abuts against the bottom of the unlocking plate, the locking hook being rotatably installed on the baffle and drivably connected to the unlocking plate, the locking hook being able to hook the locking protrusion of the front plate unit, and the locking spring being constructed so that one end thereof abuts against the baffle and the other end thereof abuts against the locking hook.

25. A pulling cart, characterized in that: include: A pull rod; A set of wheels; as well as The storage device according to any one of claims 1 to 14, wherein the pull rod is mounted on the rear plate unit, wherein the wheels are respectively mounted on the bottom of the front plate unit and the bottom of the rear plate unit, or the wheels are mounted on the bottom of the rear plate unit.

26. A pulling cart, characterized in that: include: A pull rod; A set of wheels; as well as The storage device according to any one of claims 15 to 24, wherein the pull rod is mounted on the rear plate unit, wherein the wheels are mounted on the bottom of the front plate unit and the bottom of the rear plate unit respectively, or the wheels are mounted on the bottom of the rear plate unit.

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