Plastic folding storage box

Abstract

The utility model belongs to the technical field of storage boxes, and relates to a plastic folding storage box. The box comprises a box bottom frame and four side vertical plates, and the side vertical plates are connected with the box bottom frame in a rotating mode. When the folding type storage inner bag structure needs to contain articles, the folding type storage inner bag structure is unfolded to form a cavity for containing beverage containers, the beverage containers can be arranged in order, when the connecting structure is half unfolded, the storage unfolding plate rotates outwards to be in an inclined state, and the storage inner bag structure is folded. At the moment, bottles and / or zip-top cans located in a cavity formed after the folding type storage inner bag structure is unfolded right face the opening, subsequent taking is convenient, the bottles and / or zip-top cans are located in the folding type storage inner bag structure after being unfolded, on one hand, taking is convenient, and on the other hand, the bottles and / or zip-top cans cannot roll and scatter. The whole device adopts a folding structure and a partitioned storage structure, so that storage is facilitated, the transportation space is reduced, and the practicability is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of storage boxes and relates to a plastic folding storage box. Background Art

[0002] Storage boxes are increasingly being used in household appliances, often for storing clothing and other miscellaneous items. With the growing popularity of outdoor activities like camping, more and more outdoor brands are also using foldable storage boxes for outdoor gear. Currently, most outdoor storage boxes utilize a single-chamber structure, lacking adequate storage space for beverage containers. These containers are prone to rolling and scattering, making subsequent retrieval difficult. They also have poor compartmentalization and are generally unsuitable for practicality.

[0003] To overcome the shortcomings of existing technologies, researchers have continuously explored and proposed various solutions. For example, a Chinese patent discloses a foldable storage box [Application No.: 201210393310.5], which comprises a box body and a lid. The box body includes a frame, a connecting block mounted on the frame, and a bendable connecting leg on the connecting block, which is movably connected to one end of a supporting leg. The lower edge of the frame is connected to the opening of a soft cloth bag, and the bottom of the soft cloth bag is provided with a bottom plate, and the supporting leg abuts the bottom plate. One side of the lid is fixedly connected to one side of the frame. However, this solution still lacks separate partitioned storage space for beverage containers during use, and beverage containers are still prone to rolling and scattering, making it difficult to retrieve the beverage containers later. This solution suffers from poor partitioning design and relatively limited practicality. Summary of the Invention

[0004] The purpose of this utility model is to provide a plastic foldable storage box in order to solve the above problems.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The foldable plastic storage box comprises a bottom frame and four side vertical panels, the side vertical panels being rotatably connected to the bottom frame, and the bottom frame and the side vertical panels being rotatably connected to the bottom frame to form a box body cavity with an open top when the storage box is in the unfolded state, and the side vertical panels are stacked up and down with the bottom frame when the storage box is in the folded state; at least one side vertical panel comprises a vertical frame body with an access opening and a storage expansion panel for covering the access opening, and the upper portion of the storage expansion panel is connected to the vertical frame body by a door lock structure; a foldable storage inner bag structure is installed on the inner side surface of the storage expansion panel, and the foldable storage inner bag structure is in the unfolded state to form a storage cavity for holding multiple bottles and / or cans; the storage expansion panel and the vertical frame body can also be connected by a connecting structure that keeps the storage expansion panel in an inclined state, and when the storage expansion panel is in the tilted state, the bottles and / or cans in the storage cavity can be taken out from between the top edge of the storage expansion panel and the vertical frame body.

[0007] In the above-mentioned plastic folding storage box, the foldable storage inner bag structure includes an inner pad and a folding frame arranged on the inner side of the storage expansion plate. The inner pad and the storage expansion plate are rotatably matched through a rotating shaft. The bottom of the folding frame has a pad supporting portion. When the inner pad is rotated to the degree of the storage expansion plate, the bottom of the inner pad abuts against the pad supporting portion.

[0008] In the above-mentioned plastic foldable storage box, the foldable frame has two foldable hinge parts on both sides, and the foldable hinge parts are made of thin plastic material. The two sides of the foldable frame can be folded and closed along the longitudinal direction of the foldable hinge parts.

[0009] In the above-mentioned plastic folding storage box, the inner side of the storage expansion plate further has a rotating shaft fixing seat integrally formed with the storage expansion plate, and the inner side of the folding frame has a plurality of fixed shafts rotatably matched with the rotating shaft fixing seat.

[0010] In the above-mentioned plastic foldable storage box, the inner pad and the foldable frame form a bag cavity with an upward opening.

[0011] In the above-mentioned plastic folding storage box, the connecting structure includes multiple hinge rods located between the storage expansion plate and the vertical frame body. The two adjacent hinge rods are rotatably matched through a flat-head clamping shaft and an axis hole structure. The storage expansion plate and the vertical frame body are respectively provided with a connecting seat for fixing the hinge rod and allowing the hinge rod to rotate. The two hinge rods close to the side of the vertical frame body are called the first hinge rod and the second hinge rod. A semi-open bayonet is provided in the first hinge rod, and the second hinge rod has a clamping rod integrally formed with the second hinge rod. When the second hinge rod rotates to the overlapping position of the first hinge rod, the clamping rod is clamped and matched with the semi-open bayonet.

[0012] In the above-mentioned plastic folding storage box, the connecting structure includes a rope or connecting rod located between the storage expansion plate and the vertical frame body, one end of the rope or connecting rod is rotatably connected to the storage expansion plate, and the other end is rotatably connected to the vertical frame body or can be detached from the vertical frame body so that the storage expansion plate can be laid flat.

[0013] In the above-mentioned plastic folding storage box, the inner side walls of the side vertical panels are provided with a plurality of reinforcing rib frames, the reinforcing rib frames are provided with alignment buckles integrally formed with the reinforcing rib frames, a plurality of buckle grooves are provided in the vertical frame body, and the side vertical panels are also provided with elastic support strips. When the side vertical panels and the vertical frame body are assembled, the elastic support strips are in contact with the inner wall of the vertical frame, and the alignment buckles are engaged with the buckle grooves.

[0014] In the above-mentioned plastic folding storage box, a plurality of bottom frame fixing shafts are provided in the bottom frame of the box, and semi-open fixing shaft sleeves are provided at the bottom of the side vertical plates and the vertical frame body respectively, and the bottom frame fixing shafts are rotationally matched with the semi-open fixing shaft sleeves.

[0015] In the above-mentioned plastic folding storage box, the door lock structure includes two locking grooves arranged in the vertical frame body and two locking slides arranged in the storage expansion plate that can move back and forth in a horizontal direction. The locking slides correspond to the positions of the locking grooves and are matched in shape. A box cover body is provided above the four side vertical panels.

[0016] Compared with the existing technology, the advantages of this utility model are:

[0017] When the connecting structure is half unfolded, the storage expansion plate is rotated outward to a tilted state, at which time the bottles and / or cans in the cavity formed after the folding storage inner bag structure is unfolded are directly opposite to the opening, making it convenient for subsequent taking out. The bottles and / or cans are located in the folding storage inner bag structure after unfolding, which is convenient for taking out. On the one hand, the bottles and / or cans are convenient for taking out. On the other hand, the bottles and / or cans will not roll over and scatter. The device as a whole adopts a folding structure and a partitioned storage structure, which is convenient for storage and reduces transportation space, and has strong practicality.

[0018] 2. When the folding frame and the inner pad are not needed to hold beverage containers, the inner pad is first rotated inward, and then the two sides of the folding frame are folded and closed along the longitudinal direction of the folding hinge portion. The folding hinge portion is made of a thin plastic material to form a hinge-like structure, which facilitates the folding of the folding frame and increases the storage space of the box cavity. During the folding process, the fixed shaft and the rotating shaft fixing seat rotate and cooperate to facilitate the folding and folding of the folding frame.

[0019] Other advantages, objectives and features of the present invention will be reflected in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural diagram of the present utility model.

[0021] Figure 2 It is a schematic diagram of the expansion of the present utility model.

[0022] Figure 3 It is a schematic diagram of opening and unfolding the cover of the present invention.

[0023] Figure 4 It is a partial structural diagram of the utility model.

[0024] Figure 5 It is a structural diagram of a foldable storage inner bag structure.

[0025] Figure 6 It is a partial structural diagram of the utility model in another direction.

[0026] Figure 7 It is a partial structural diagram of the utility model in another direction.

[0027] In the figure: box bottom frame 1, box cover body 10, side vertical plate 2, elastic support strip 2a, vertical frame body 3, locking groove 3b, bottom frame fixed shaft 4a, semi-open fixed shaft sleeve 4b, box body cavity 5, reinforcing rib frame 6a, alignment buckle 6b, storage expansion plate 7, rotating shaft fixing seat 7a, locking slide 7b, multi-section hinge rod 8, foldable storage inner bag structure 9, inner pad 9a, folding frame 9b, pad supporting part 9b1, folding hinge part 9b2, fixed shaft 9b3, bag cavity 90, hinge rod 8a, flat head clamping shaft 8a1, shaft hole structure 8a2, first hinge rod 8aa, semi-open bayonet 8aa1, second hinge rod 8ab, clamping rod 8ab1. DETAILED DESCRIPTION

[0028] The present invention will be further described below with reference to the accompanying drawings.

[0029] Example 1

[0030] like Figure 1-7 As shown, a plastic foldable storage box includes a box bottom frame 1 and four side vertical panels 2, the side vertical panels 2 are rotatably connected to the box bottom frame 1, and when the storage box is in the expanded state, the box bottom frame 1 and the side vertical panels 2 are enclosed to form a box cavity 5 with an open upward opening, and when the storage box is in the folded state, the side vertical panels 2 and the box bottom frame 1 are stacked up and down; at least one side vertical panel 2 includes a vertical frame body 3 with an access port and a storage expansion plate 7 for covering the access port, the bottom edge of the storage expansion plate 7 is rotatably connected to the vertical frame body 3, and the upper part of the storage expansion plate 7 is connected to the vertical frame body 3. The storage expansion plate 7 is connected to the door lock structure; a foldable storage inner bag structure 9 is installed on the inner side surface of the storage expansion plate 7, which forms a storage cavity for holding multiple bottles and / or cans when the foldable storage inner bag structure 9 is in the expanded state; the storage expansion plate 7 and the vertical frame 3 can also be connected by a connecting structure that keeps the storage expansion plate 7 in an inclined state. When the storage expansion plate 7 is in the inclined state, the bottles and / or cans in the storage cavity can be taken out from between the top edge of the storage expansion plate 7 and the vertical frame 3. A box cover body 10 is provided above the four side vertical plates 2.

[0031] When the foldable storage bag 9 is in the closed position, the bottle and / or can are placed in the closed position, and the bottle and / or can are placed in the closed position, so that the foldable storage bag 9 has a convenient storage space.

[0032] Combine Figure 1-7 As shown, the foldable storage inner bag structure 9 includes an inner pad 9a and a folding frame 9b arranged on the inner side of the storage expansion plate 7. The inner pad 9a and the storage expansion plate 7 are rotatably matched through a rotating shaft. The bottom of the folding frame 9b has a pad supporting portion 9b1. When the inner pad 9a is rotated to 90 degrees to the storage expansion plate 7, the bottom of the inner pad 9a abuts against the pad supporting portion 9b1, and the inner pad 9a and the folding frame 9b form a bag cavity 90 with an opening facing upward.

[0033] Specifically, when bottles and / or cans need to be placed, the folding frame 9b is unfolded, and the storage expansion plate 7 is rotated 90 degrees, so that the bottom of the inner pad 9a abuts against the pad support portion 9b1, forming a bag cavity 90 with an upward opening for placing beverage containers.

[0034] Combine Figure 3 、 Figure 4 As shown, the folding frame 9b has two folding hinge parts 9b2 on both sides, and the folding hinge parts 9b2 are made of thin plastic material. The two sides of the folding frame 9b can be folded and closed along the longitudinal direction of the folding hinge parts 9b2. The inner side of the storage expansion plate 7 also has a rotating shaft fixing seat 7a integrally formed with the storage expansion plate 7, and the inner side of the folding frame 9b has a plurality of fixed shafts 9b3 that rotate with the rotating shaft fixing seat 7a.

[0035] In this embodiment, when the folding frame 9b and the inner pad 9a are not needed to hold bottles and / or cans, the inner pad 9a is first rotated inward, and then the two sides of the folding frame 9b are folded and closed along the longitudinal direction of the folding hinge part 9b2. The folding hinge part 9b2 is made of thin plastic material to form a hinge-like structure, which facilitates the folding of the folding frame 9b and increases the storage space of the box cavity 5. During the folding process, the fixed shaft 9b3 rotates and cooperates with the rotating shaft fixing seat 7a to facilitate the folding and folding of the folding frame 9b.

[0036] The connecting structure includes multiple hinge rods 8a located between the storage expansion plate 7 and the vertical frame body 3. The adjacent two hinge rods 8a are rotatably matched through the flat-head clamping shaft 8a1 and the shaft hole structure 8a2. The storage expansion plate 7 and the vertical frame body 3 are respectively provided with a connecting seat for fixing the hinge rod 8a and allowing the hinge rod 8a to rotate. The two hinge rods 8a close to the side of the vertical frame body 3 are called the first hinge rod 8aa and the second hinge rod 8ab. A semi-open bayonet 8aa1 is provided in the first hinge rod 8aa, and the second hinge rod 8ab has a clamping rod 8ab1 integrally formed with the second hinge rod 8ab. When the second hinge rod 8ab rotates to the overlapping position of the first hinge rod 8aa, the clamping rod 8ab1 is clamped and matched with the semi-open bayonet 8aa1.

[0037] In this embodiment, the storage expansion plate 7 is closed or unfolded by retracting and unfolding multiple hinge rods 8a. When the storage expansion plate 7 needs to be semi-expanded, the two hinge rods 8a on the side away from the vertical frame body 3 are fully unfolded. At this time, the second hinge rod 8ab is rotated to the overlapping position of the first hinge rod 8aa, so that the card rod 8ab1 is engaged with the semi-open card slot 8aa1 to achieve the semi-expanded state of the storage expansion plate 7. The storage expansion plate 7 is rotated outward to a tilted state. At this time, the beverage container in the cavity formed after the folding frame 9b and the inner pad 9a are unfolded is facing the opening, which is convenient for subsequent taking.

[0038] Combine Figure 6-7 As shown, the inner wall of the side vertical plate 2 is provided with a plurality of reinforcing rib frames 6a, and the reinforcing rib frame 6a has an alignment buckle 6b integrally formed with the reinforcing rib frame 6a. A plurality of buckle grooves 3a are opened in the vertical frame body 3, and the side vertical plate 2 is also provided with an elastic support strip 2a. When the side vertical plate 2 and the vertical frame body 3 are spliced ​​together, the elastic support strip 2a abuts against the inner wall of the vertical frame body 3, and the alignment buckle 6b is engaged with the buckle groove 3a.

[0039] In this embodiment, when the storage box is unfolded and formed, the elastic support strip 2a abuts against the inner wall of the vertical frame 3, and the alignment buckle 6b is engaged with the buckle groove 3a, forming a multi-directional fixation to prevent the storage box from shaking, and the connection is more stable.

[0040] Combine Figure 1 、 Figure 2 As shown, a plurality of bottom frame fixing shafts 4a are provided in the bottom frame 1 of the box, and semi-open fixing shaft sleeves 4b are provided at the bottom of the side vertical plates 2 and the vertical frame body 3 respectively. The bottom frame fixing shafts 4a are rotationally matched with the semi-open fixing shaft sleeves 4b.

[0041] In this embodiment, the side vertical plates 2 and the vertical frame body 3 are rotatably matched between the bottom frame fixing shaft 4a and the semi-open fixing shaft sleeve 4b, so as to facilitate the assembly or folding of the storage box.

[0042] Combine Figure 2-7 As shown, the door lock structure includes two locking grooves 3b arranged in the vertical frame body 3 and two locking slides 7b which can move back and forth in a horizontal direction and are arranged in the storage expansion plate 7. The locking slides 7b correspond to the positions of the locking grooves 3b and are matched in shape. A box cover body 10 is provided above the four side vertical plates 2.

[0043] In this embodiment, after the storage expansion plate 7 is fitted onto the vertical frame 3 , the locking slide bar 7 b is inserted into the locking groove 3 b to prevent the storage expansion plate 7 from rotating outward again, thereby achieving locking.

[0044] Example 2

[0045] The structure of this embodiment is basically the same as that of embodiment 1, except that: the connecting structure includes a rope or a connecting rod located between the storage expansion plate 7 and the vertical frame body 3, one end of the rope or connecting rod is rotatably connected to the storage expansion plate 7, and the other end is rotatably connected to the vertical frame body 3 or can be detached from the vertical frame body 3 so that the storage expansion plate 7 can be laid flat.

[0046] In this embodiment, the storage expansion plate 7 is closed or unfolded by the retraction and expansion of the rope or connecting rod. When the rope or connecting rod is used, the storage expansion plate 7 has three states. When the rope or connecting rod is retracted, the storage expansion plate 7 is spliced ​​with the vertical frame 3. When the rope or connecting rod is unfolded, the storage expansion plate 7 remains in an inclined state after opening. After the rope or connecting rod is disconnected from the vertical frame 3, the storage expansion plate 7 loses traction, so that the storage expansion plate 7 is flat.

[0047] The working principle of this utility model is:

[0048] When items need to be placed, the box cover 10 is opened to expose the box cavity 5, which can be used to place items. The foldable storage inner bag structure 9 is unfolded to form a cavity for holding beverage containers, which can be neatly arranged. When beverage containers need to be placed, the folding frame 9b is unfolded, and the storage expansion plate 7 is rotated to a 90-degree angle, so that the bottom of the inner pad 9a abuts against the pad support portion 9b1, forming a bag cavity 90 with an upward opening for placing beverage containers.

[0049] When the folding frame 9b and the inner pad 9a are not needed to hold beverage containers, the inner pad 9a is first rotated inward, and then the two sides of the folding frame 9b are folded and closed along the longitudinal direction of the folding hinge portion 9b2. The folding hinge portion 9b2 is made of thin plastic material to form a hinge-like structure, which facilitates the folding of the folding frame 9b and increases the storage space of the box cavity 5. During the folding process, the fixed shaft 9b3 rotates and cooperates with the rotating shaft fixing seat 7a to facilitate the folding and folding of the folding frame 9b.

[0050] The storage expansion plate 7 is folded or unfolded by folding and unfolding a plurality of hinge rods 8a. When the storage expansion plate 7 needs to be semi-expanded, the two hinge rods 8a on the side away from the vertical frame 3 are fully unfolded. At this time, the second hinge rod 8ab is rotated to the overlapping position of the first hinge rod 8aa, so that the clamping rod 8ab1 is engaged with the semi-open clamping slot 8aa1 to realize the semi-expanded state of the storage expansion plate 7. The storage expansion plate 7 is rotated outward to an inclined state. At this time, the beverage container in the cavity formed by the folding frame 9b and the inner pad 9a is facing the opening, which is convenient for subsequent taking out.

[0051] When the storage box is unfolded and formed, the elastic support strip 2a abuts against the inner wall of the vertical frame 3, and the alignment buckle 6b is engaged with the buckle groove 3a to form a multi-directional fixation to prevent the storage box from shaking. The connection is relatively stable. The side vertical plate 2 and the vertical frame 3 are rotated together through the bottom frame fixed shaft 4a and the semi-open fixed shaft sleeve 4b to facilitate the assembly or folding of the storage box. When the storage expansion plate 7 is fitted with the vertical frame 3, the locking slide 7b is inserted into the locking groove 3b to prevent the storage expansion plate 7 from rotating outward again to achieve locking.

[0052] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described, or replace them with similar methods, without departing from the spirit of the present invention.

[0053] Although this article generally uses terms such as box bottom frame 1, box cover body 10, side vertical plate 2, elastic support strip 2a, vertical frame body 3, locking groove 3b, bottom frame fixed shaft 4a, half-open fixed shaft sleeve 4b, box body cavity 5, reinforcing rib frame 6a, alignment buckle 6b, storage expansion plate 7, rotating shaft fixing seat 7a, locking slide 7b, multi-section hinge rod 8, foldable storage inner bag structure 9, inner pad 9a, folding frame 9b, pad supporting portion 9b1, folding hinge portion 9b2, fixed shaft 9b3, bag cavity 90, hinge rod 8a, flat head clamping shaft 8a1, shaft hole structure 8a2, first hinge rod 8aa, half-open bayonet 8aa1, second hinge rod 8ab, clamping rod 8ab1, the possibility of using other terms is not excluded. Using these terms is only to more conveniently describe and explain the essence of the utility model, and interpreting them as any additional restriction is contrary to the spirit of the utility model.

Claims

1. A plastic foldable storage box, comprising a box bottom frame (1) and four side vertical panels (2), the side vertical panels (2) and the box bottom frame (1) being rotatably connected, the box bottom frame (1) and the side vertical panels (2) being enclosed together to form a box cavity (5) with an opening facing upward when the storage box is in an unfolded state, and the side vertical panels (2) and the box bottom frame (1) being stacked up and down when the storage box is in a folded state; at least one side vertical panel (2) comprises a vertical frame body (3) having an access opening and a storage expansion plate (7) for covering the access opening, the bottom edge of the storage expansion plate (7) being rotatably connected to the vertical frame body (3), and the upper part of the storage expansion plate (7) being connected to the vertical frame body (3) by a door lock structure; characterized in that A foldable storage inner bag structure (9) is installed on the inner side of the storage expansion plate (7), and when the foldable storage inner bag structure (9) is in the expanded state, a storage cavity for holding a plurality of bottles and / or cans is formed; the storage expansion plate (7) and the vertical frame (3) can also be connected by a connecting structure that keeps the storage expansion plate (7) in an inclined state, and when the storage expansion plate (7) is in the inclined state, the bottles and / or cans in the storage cavity can be taken out from between the top edge of the storage expansion plate (7) and the vertical frame (3).

2. The plastic foldable storage box according to claim 1, characterized in that: The foldable storage inner bag structure (9) comprises an inner pad (9a) and a folding frame (9b) arranged on the inner side of the storage expansion plate (7). The inner pad (9a) and the storage expansion plate (7) are rotatably matched via a rotating shaft. The bottom of the folding frame (9b) has a pad supporting portion (9b1). When the inner pad (9a) is rotated to the storage expansion plate (7) at 90 degrees, the bottom of the inner pad (9a) abuts against the pad supporting portion (9b1).

3. The plastic foldable storage box according to claim 2, characterized in that: The folding frame (9b) has two folding hinge parts (9b2) on both sides. The folding hinge parts (9b2) are made of thin plastic material. The two sides of the folding frame (9b) can be folded and closed along the longitudinal direction of the folding hinge parts (9b2).

4. The plastic foldable storage box according to claim 3, characterized in that: The inner side of the storage expansion plate (7) also has a rotating shaft fixing seat (7a) integrally formed with the storage expansion plate (7), and the inner side of the folding frame (9b) has a plurality of fixed shafts (9b3) rotatably matched with the rotating shaft fixing seat (7a).

5. The plastic foldable storage box according to claim 4, characterized in that: The inner pad (9a) and the folding frame (9b) form a bag cavity (90) with an upward opening.

6. The plastic foldable storage box according to any one of claims 1 to 4, characterized in that: The connection structure comprises a plurality of hinge rods (8a) located between the storage expansion plate (7) and the vertical frame body (3); two adjacent hinge rods (8a) are rotatably matched with each other through a flat-head clamping shaft (8a1) and an axis hole structure (8a2); the storage expansion plate (7) and the vertical frame body (3) are respectively provided with a connecting seat for fixing the hinge rods (8a) and enabling the hinge rods (8a) to rotate; the two hinge rods (8a) close to one side of the vertical frame body (3) are called the first hinge rod (8aa) and the second hinge rod (8ab); a semi-open bayonet (8aa1) is provided in the first hinge rod (8aa); the second hinge rod (8ab) has a clamping rod (8ab1) integrally formed with the second hinge rod (8ab); when the second hinge rod (8ab) rotates to the overlapping position of the first hinge rod (8aa), the clamping rod (8ab1) is clamped and matched with the semi-open bayonet (8aa1).

7. The plastic foldable storage box according to any one of claims 1 to 4, characterized in that: The connection structure comprises a rope or a connecting rod located between the storage expansion plate (7) and the vertical frame body (3); one end of the rope or the connecting rod is rotatably connected to the storage expansion plate (7), and the other end is rotatably connected to the vertical frame body (3) or can be detached from the vertical frame body (3) so that the storage expansion plate (7) is laid flat.

8. The plastic foldable storage box according to claim 1, characterized in that: The inner wall of the side vertical plate (2) is provided with a plurality of reinforcing rib frames (6a), the reinforcing rib frames (6a) are provided with alignment buckles (6b) integrally formed with the reinforcing rib frames (6a), a plurality of buckle grooves (3a) are provided in the vertical frame body (3), and the side vertical plate (2) is further provided with an elastic support strip (2a). When the side vertical plate (2) and the vertical frame body (3) are assembled, the elastic support strip (2a) abuts against the inner wall of the vertical frame body (3), and the alignment buckles (6b) are engaged with the buckle grooves (3a).

9. The plastic foldable storage box according to claim 1, characterized in that: A plurality of bottom frame fixing shafts (4a) are provided in the bottom frame (1) of the box, and semi-open fixing shaft sleeves (4b) are provided at the bottoms of the side vertical plates (2) and the vertical frame body (3), respectively. The bottom frame fixing shafts (4a) and the semi-open fixing shaft sleeves (4b) are rotationally matched.

10. The plastic foldable storage box according to any one of claims 1 to 4, characterized in that: The door lock structure comprises two locking grooves (3b) arranged in the vertical frame body (3) and two locking slides (7b) arranged in the storage expansion plate (7) and capable of reciprocating linear motion in the horizontal direction. The locking slides (7b) correspond to the positions of the locking grooves (3b) and are matched in shape. A box cover body (10) is provided above the four side vertical plates (2).

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