CN110356678A - collapsible box - Google Patents

Abstract

The application discloses a collapsible box. The foldable box has a box body and a box cover, wherein the box body has a base and a pair of opposite first side panels and a pair of opposite second side panels foldably connected to the base. One edge of the box cover is hinged on the top of the box body. The connection between the cover and the first side panel and the second side panel, the connection between the base and the first side panel and the second side panel, and the connection between the first side panel and the second side panel Both are provided with seals. The collapsible box of the present application can realize good airtightness while being foldable.

Description

collapsible box

technical field

The invention relates to a container, in particular to a collapsible box.

Background technique

In the existing collapsible container, when in use, the side panels should be relatively unfolded and upright, and the four side panels are interlocked to form a relatively closed space to accommodate goods. When the collapsible container is used to load fresh fruits and vegetables, it is especially necessary During cold chain transportation, the relative sealing of the container is particularly important, because the transportation of fresh food is easily polluted by the external environment, resulting in food corrosion and deterioration. Most of these containers are generally collapsible containers without a cover. Fresh food is loaded into the container, and the top of the container is generally open, so that the food is very susceptible to the influence of external conditions. However, the existing container with a cover cannot be folded, so it is extremely inconvenient to store and transport.

Therefore, there is a need in the art for a collapsible container with a lid, which can ensure relative closure when unfolded and upright, and can be folded and stored conveniently when not in use.

Contents of the invention

The purpose of the present invention is to provide a collapsible container, which is provided with a single flip cover, which can be folded and stored in the edge of the base when it is not in use. Preferably, it can also ensure that the container is relatively closed when it is unfolded and upright.

To achieve the above object, the present invention provides a foldable box having a box body and a box cover, wherein the box body has a base and a pair of opposite first sides foldably connected to the base plate and a pair of opposite second side plates, one edge of the cover is hinged on the top of the box body, wherein, the cover and the first side plate and the second side plate between seals are provided at the joints, the joints between the base and the first side plate and the second side plate, and the joints between the first side plate and the second side plate .

In one embodiment, the sealing member between the case cover and the first side plate and the second side plate is arranged on the outer periphery of the bottom side of the case cover and is fixedly connected to the case cover.

In one embodiment, the case cover is formed by welding an inner plate and an outer plate, the outer plates at a pair of opposite edges of the case cover extend beyond the edge of the inner plate, and the other pair of opposite edges One edge of the box cover is provided with a hinged portion of the box cover, and the outer plate at the other edge is flush with the inner plate or also extends beyond the edge of the inner plate, and the sealing member on the box cover is connected to the inner plate.

In one embodiment, the outer plate at the other edge of the cover opposite to the edge provided with the hinge part of the cover is provided with a card edge, and the inner top end of the first side plate is provided with a concave opening with an upward opening. groove, and the card edge is operatively snapped into the groove.

In one embodiment, the box cover is further configured such that, when the box cover is covered, a portion of the outer panel of the box cover extending beyond the edge of the inner panel overlaps the second side panel.

In one embodiment, the sealing member of the case cover is an annular member having two pairs of opposite sides, and the pair of opposite sides of the sealing member of the case cover extend beyond the said second side plate. The outer edge of the inner panel, one of the other pair of opposing sides, is operable to abut said first side panel.

In one embodiment, the box cover is hinged to one of a pair of opposite first side plates, and the inner side of the top end of the other of the pair of opposite first side plates is provided with an opening facing upward and towards the box body. An internal groove against which a portion of the lid seal is operable to abut.

In one embodiment, the seal of the box cover has a seal body and at least one row of mounting columns protruding from the seal body, the ends of the mounting columns are provided with buckles, and the box cover has corresponding mounting posts. hole, the buckle snaps into the mounting hole.

In one embodiment, the first edge of the case cover is hinged to the top end of one of the pair of first side plates through a hinge, the first edge of the case cover is provided with a case cover hinge, and a A side panel hinge is provided on the top of one of the first side panels, wherein the first edge and the second edge of the hinge are respectively provided with a first main body hinge and a second main body hinge, the The lid hinge and the first main body hinge are hinged to each other, and the side panel hinges and the second body hinge are hinged to each other, wherein a hinge seal is attached to the underside of the hinge, the A first side of the hinge seal is operable to abut the first side panel.

In one embodiment, a second side of the hinge seal, opposite the first side, overlaps the seal on the lid.

In one embodiment, the left and right side edges of the plate-shaped main body of the second side plate are provided with side plate joints, and the side plate joints are connected with side plate seals, and the side plate seals extend beyond the Side panel seams.

In one embodiment, the side plate seal has a strip-shaped plate-shaped main body, and a plurality of protrusions spaced apart from each other are provided on the strip-shaped plate-shaped main body, and corresponding recesses are provided on the side plate engagement portion. the groove, and the protrusion on the elongated plate-shaped body is operatively fixed to the groove.

In one embodiment, both the first side panel and the second side panel have a plate-shaped main body and a plurality of hinge extensions spaced apart from each other extending from the lower part of the plate-shaped main body, and the base has a plate-shaped body. shaped main body and two pairs of opposite side guards extending upward from two pairs of opposite edges of the plate-like main body, the side guards are provided with a concave cavity with an opening facing upwards and toward the inside of the box body, wherein the hinge extension is installed with The seal and/or the cavity of the base is fitted with a seal.

In one embodiment, the sealing member installed on the hinge extension is located on the left, right and lower sides of the hinge extension and extends beyond the left, right and lower sides of the hinge extension.

In one embodiment, seals are installed on the left and right side edges of the plate-shaped main body of the second side plate.

In one embodiment, a separate seal is attached to each of said hinge extensions.

In one embodiment, the base has a plate-shaped main body and a pair of opposite side guards extending upward from a pair of opposite edges of the plate-like main body, and the side guards are provided with a concave cavity with an opening facing upward and toward the inside of the box. , the middle part of the concave cavity is provided with a base stop integrally extending upward from the bottom wall of the concave cavity; the first side plate and the second side plate have a plate-shaped main body and a plate-shaped main body A plurality of hinge extensions extending from the lower part spaced apart from each other, seals are installed on the left and right side edges of the plate-shaped main body of the first side plate and/or the second side plate, and each hinge extension The bottom end is provided with a side plate hinge shaft, wherein the side plate hinge shaft cooperates with the base limit part, and the seal installed on the hinge extension part is located on the left, right and lower sides of the hinge extension part. and extend beyond the left and right sides and underside of the hinge extension.

In one embodiment, vertical grooves are provided on the left and right edges of the sealing member installed on the hinge extension part and/or horizontal grooves are provided on the lower edge.

In one embodiment, the edge protector is further provided with a base guide part located in the base limiting part and opening towards the inside, and each of the hinge extension parts is further provided with a side plate located between the hinge shafts of the side plates. The board guide part, the side board guide part is connected to the base guide part in a vertically slidable manner.

In one embodiment, the base limiting part is a plate-shaped part, the base guiding part is a groove provided in the middle of the base limiting part, and the upper part of the two side walls of the cavity is provided with The first base limit protrusion.

In one embodiment, the hinge extension part has a plate-shaped body, and the hinge axis of the side plate extends from the left and right sides of the bottom end of the plate-shaped body toward a direction parallel to the side plate, and the side plate guide part is A guide block extending from the plate-shaped main body in a direction perpendicular to the plate-shaped main body.

In one embodiment, each of the first side plate, the second side plate and the box cover is welded by an inner plate and an outer plate, and a There is an insulation layer; and the base has a plate-shaped body and an edge protection extending upward from the periphery of the plate-shaped body, and an insulation layer is arranged inside the plate-shaped body and the edge protection.

In one embodiment, the first edge of the case cover is hinged to the top end of one of the pair of first side plates through a hinge, the case cover is provided with a case cover hinge portion along the first edge, and a A side panel hinge is provided on the top of one of the first side panels, wherein the first edge and the second edge of the hinge are respectively provided with a first main body hinge and a second main body hinge, the The lid hinge part and the first body hinge part are hinged to each other, and the side plate hinge part and the second body hinge part are hinged to each other.

In one embodiment, the hinge is a component separate from the box body and the box cover, and the box cover hinge is only provided along the first edge of the box cover.

In one embodiment, the size of the assembly formed by the hinged member and the box lid being hinged to each other matches the size of the opening of the foldable box.

In one embodiment, the hinge part of the first body of the hinge is provided with a plurality of grooves spaced apart from each other along the first edge, wherein at least a part of the hinge part of the lid of the lid is located in the grooves.

In one embodiment, the hinges and the width of the case cover are set such that when the case cover is turned over to the outer side of the side plate, the edge of the case cover does not extend beyond the bottom of the side plate end.

In one embodiment, the box cover has a plate-shaped main body, and the other edges of the box cover except the first edge are operable to overlap the sides of the first side panel and the second side panel respectively. top.

In one embodiment, the hinged portion of the case cover includes a plurality of extended portions of the case cover that are spaced apart from each other, and each of the extended portions of the case cover is provided with a hinge hole; a side panel extension, each side panel extension is provided with a hinge hole; the first body hinge and the second body hinge respectively include a plurality of first body extensions spaced apart from each other and a plurality of second main body extensions, each of the first main body extensions and each of the second main body extensions is provided with a hinge hole; wherein the first hinge shaft extends through the box cover The hinge hole of the first main body extension part and the hinge hole of the first main body extension part, and the second hinge shaft passes through the hinge hole of the second main body extension part and the hinge hole of the side plate extension part.

In one embodiment, the lid hinge includes a plurality of lid extensions spaced apart from each other, the side panel hinge includes a plurality of side panel extensions spaced apart from each other, and the first main body hinge The part and the second body hinge part respectively include a plurality of first body extensions and a plurality of second body extensions spaced apart from each other; wherein the lid extension and the first body extension One of them is provided with a hinge shaft, and the other is provided with a hinge hole matched with the hinge shaft; one of the side plate extensions and the second main body extension is provided with a hinge shaft, and the other is provided with a hinge hole matched with the hinge shaft. The hinge hole that the hinge shaft fits into.

In one embodiment, one pair of side panels in the two pairs of opposite side panels is a long side panel with a long length, and the other pair of side panels is a short side panel with a short length, and the box cover is hinged on one of the long side panels. the top of the side panels.

In one embodiment, the base has a plate-shaped main body and a pair of opposite side guards extending upward from a pair of opposite edges of the plate-like main body, and the side guards are provided with concave cavities with openings facing upward and inward, so that The upper part of the end walls on both sides of the concave cavity is provided with a first base limiting protrusion, and the middle part of the concave cavity is provided with a base limiting part extending upward from the bottom wall of the concave cavity and located in the base limiting part. And towards the base guide part of the inner opening; the bottom end of the long side plate is provided with a plurality of hinge extensions spaced apart from each other, and the bottom end of each hinge extension is provided with a side plate hinge shaft and on the side The side plate guide part between the plate hinge shafts; wherein the side plate hinge shaft cooperates with the first limiting protrusion and the base limit part, and the side plate guide part cooperates with the base guide part.

In one embodiment, the box cover is further provided with a locking mechanism for locking the box cover to the side plate, and the locking mechanism is arranged on the other half of the box cover other than the half where the hinge part of the box cover is located. .

In one embodiment, each of the first side plate, the second side plate and the box cover is welded by an inner plate and an outer plate, and a There is an insulation layer; and the base has a plate-shaped body and an edge protection extending upward from the periphery of the plate-shaped body, and an insulation layer is arranged inside the plate-shaped body and the edge protection.

In one embodiment, two rows of welding bars spaced apart from each other are provided on the inner side of the outer peripheral edge of one of the inner plate and the outer plate.

In one embodiment, the outer plate at a pair of opposite edges of the cover extends beyond the edge of the inner plate, one edge of the other pair of opposite edges is provided with a cover hinge, and the other edge is provided with a cover hinge. The outer and inner panels are flush.

In one embodiment, the box cover is hinged to one of a pair of opposite first side plates, and the inner side of the top end of the other of the pair of opposite first side plates is provided with an opening facing upward and towards the box body. Internal grooves.

In one embodiment, the tops of the first side plate and the second side plate are provided with airtight cavities.

In one embodiment, the left and right ends of the first side plate and the second side plate are provided with side plate joints, and the bottom ends of the first side plate and the second side plate are provided with hinges A protruding portion, wherein the side plate engaging portion and the hinge protruding portion are integrally formed on the side plate.

In one embodiment, the side plate engaging portion and the hinge extension portion are integrally formed on the side plate.

In one embodiment, the base is formed by welding the base body and the bottom plate.

In one embodiment, the base body is provided with a plate-shaped body cavity and two pairs of opposite edge-protecting cavities, wherein the plate-shaped body cavity and the edge-protecting cavities are spaced apart from each other.

In one embodiment, the edge protection is provided with a plurality of mutually spaced concave cavities with openings facing upward and towards the interior of the box, and an insulating layer is provided inside the edge protection between the concave cavities.

In one embodiment, the first edge of the case cover is hinged to the top end of one of the pair of first side plates through a hinge, the first edge of the case cover is provided with a case cover hinge, and a A side panel hinge is provided on the top of one of the first side panels, wherein the first edge and the second edge of the hinge are respectively provided with a first main body hinge and a second main body hinge, the The lid hinge and the first body hinge are hinged to each other, and the side plate hinge and the second body hinge are hinged to each other, wherein the hinge seal is attached to the underside of the hinge body, the A first side of the hinge seal is operable to abut the first side panel.

In one embodiment, at least a portion of a second side of the hinge seal opposite the first side overlaps the seal on the lid.

In one embodiment, the second side plate has a plate-shaped main body and a plurality of hinge extensions extending from the lower part of the plate-shaped main body spaced apart from each other, and the bottom end of each hinge extension is provided with a side plate The hinge part, the left and right side edges of the plate-shaped main body and the hinge part of the side panels are all provided with seals.

In one embodiment, each of said side panel hinges is provided with a separate seal.

In one embodiment, the left and right side edges of the plate-shaped main body of the second side plate are provided with side plate joints, and the side plate joints are connected with side plate seals, and the side plate seals extend beyond the Side panel seams.

In one embodiment, the insulation layer is made of polyurethane foam, polystyrene board or phenolic foam.

The collapsible box of the present application can realize good airtightness while being foldable.

Description of drawings

Figure 1 is a perspective view of a collapsible box according to the present invention.

Fig. 2 is an exploded perspective view of side panels, hinges and a box cover of the foldable box according to the present invention.

Fig. 3 is a perspective view of the foldable box according to the present invention in a folded state.

FIG. 3A is an enlarged view of detail A in FIG. 3 .

FIG. 3B is an enlarged view of detail B in FIG. 3 .

Fig. 4 is a perspective view of a collapsible box according to the present invention with a pair of side panels removed.

FIG. 4A is an enlarged view of detail A in FIG. 4 .

FIG. 4B is an enlarged view of detail B in FIG. 4 .

Fig. 5 is a perspective view of the box cover folded outward relative to the side panels.

FIG. 5A is an enlarged view of detail A in FIG. 5 .

6A is a perspective view of a pair of opposing side panels of a collapsible box folded relative to a base according to the present invention.

6B is a perspective view of a side panel of a collapsible box according to the present invention.

Fig. 6C is a schematic diagram showing that the side panels of the collapsible box are detached from the base according to the present invention.

Figure 6D is an enlarged view of detail D in Figure 6C.

Figure 7 is a partially exploded perspective view of a collapsible box according to the present invention with a pair of opposing side panels folded over the base.

Fig. 8 is a partial cross-sectional view of the side panel in an upright state relative to the base, wherein the hinge part is cut away.

FIG. 8A is an enlarged view of detail A of FIG. 8 .

Fig. 9 is a longitudinal perspective view of a foldable box provided with an insulating layer.

9A and 9B are enlarged views of details A and B of FIG. 9, respectively.

Fig. 10 is a partially cutaway exploded perspective view of the base of the collapsible box according to the present invention.

FIG. 10A is an enlarged view of detail A of FIG. 10 .

Fig. 11 is a partially cutaway exploded perspective view of a side panel of a foldable box according to the present invention.

FIG. 11A is an enlarged view of detail A of FIG. 11 .

Fig. 12 is a partially cutaway exploded perspective view of the lid of the foldable box according to the present invention.

FIG. 12A is an enlarged view of detail A of FIG. 12 .

Fig. 13 is a partially cutaway perspective view of the foldable box according to the present invention, wherein the intersection of the side panels and the box cover is cut away.

FIG. 13A is an enlarged view of detail A of FIG. 13 .

Fig. 14 is another partially cut-away perspective view of the foldable box according to the present invention, wherein the intersection of the side panels and the base is cut away. .

FIG. 14A is an enlarged view of detail A of FIG. 14 .

Fig. 15 is another partially cut-away perspective view of the foldable box according to the present invention, wherein the bottom end of the side panel is cut away.

FIG. 15A is an enlarged view of detail A of FIG. 15 .

Fig. 16 is a partially cutaway view of a side panel of a collapsible box according to the present invention, with the hinge extension cut away.

FIG. 16A is an enlarged view of detail A of FIG. 16 .

Figure 17 is a perspective view of a side panel and its seal of a collapsible box according to the present invention.

Figure 18 is a perspective view of another side panel and its seal of the collapsible box according to the present invention.

Figure 19 is a perspective view of the lid of a collapsible box and its seal according to the present invention.

Fig. 20 is a partially cutaway perspective view of a collapsible box according to the present invention.

FIG. 20A is an enlarged view of detail A of FIG. 20 .

FIG. 20B is an enlarged view of detail B of FIG. 20 .

Figure 21 is a perspective view of the hinge and its seal.

Figure 22 is a perspective view of the hinge assembled with its seal.

FIG. 22A is an enlarged view of detail A of FIG. 22 .

Detailed ways

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so as to better understand the purpose, features and advantages of the present invention. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the present invention, but only to illustrate the essence of the technical solutions of the present invention.

In the following description, for the purposes of explaining the various disclosed embodiments, certain specific details are set forth in order to provide a thorough understanding of the various disclosed embodiments. One skilled in the relevant art will recognize, however, that an embodiment may be practiced without one or more of these specific details. In other instances, well-known devices, structures and techniques associated with the present application may not have been shown or described in detail in order to avoid unnecessarily obscuring the description of the embodiments.

Unless the context requires otherwise, throughout the specification and claims, the word "comprise" and variations thereof, such as "comprising" and "having" are to be read in an open, inclusive sense, i.e., "including, but not limited to".

Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiments is included in at least one embodiment. Thus, appearances of "in one embodiment" or "in an embodiment" in various places throughout the specification are not necessarily all referring to the same embodiment. In addition, particular features, structures or characteristics may be combined in any manner in one or more embodiments.

As used in this specification and the appended claims, the singular forms "a" and "the" include plural referents unless the context clearly dictates otherwise. It should be noted that the term "or" is generally employed in its sense including "and/or" unless the context clearly dictates otherwise.

In the following description, in order to clearly show the structure and working method of the present invention, many directional words will be used to describe, but "front", "rear", "left", "right", "outer", "inner" should be used Words such as ", "outward", "inward", "upper" and "lower" are to be understood as convenient terms, and should not be understood as restrictive terms.

Embodiments of the present invention are described below with reference to the drawings. Specifically referring to FIG. 1 , it shows a collapsible container 100 according to the present invention, including a base 1 , two pairs of side panels 2 , 3 and a lid 4 . Each pair of side panels 2 , 3 is hinged to the edge of the base 1 at the bottom and can be folded relative to the base 1 , and the lid 4 is hinged to the top of one of the pair of side panels 2 through a hinge 5 . The longitudinal ends of the side plates 2 and 3 are respectively provided with joints 202 and 302. When each side plate stands upright with respect to the base 1, each side plate 2 and 3 is connected to each other by the joints 202 and 302, thereby being connected to the base 1. Together forming the inner volume of the collapsible container 100 , the lid 4 can cover the top opening of the collapsible container 100 . And when the side panels 2, 3 and the lid 4 are folded relative to the base 1, the collapsible container 100 can be conveniently stored and transported. It should be understood that the connection method between the side plates 2 and 3 is not limited to the above-mentioned snap-in method, as long as they can connect end to end to enclose the internal space. The bottom ends of the side panels 2 and 3 are provided with side panel hinges to be hingedly connected to the outer edge of the base 1 .

FIG. 2 shows an exploded perspective view of the side panel 2 , the hinge 5 and the box cover 4 of the foldable box 100 . As shown in the figure, the cover 4 is provided with a cover hinge 411 along the first edge 41 adjacent to the side panel 2, and the top end 21 of the side panel 2 (also called the long side panel or the first side panel) is provided with a side panel. Plate hinge 211 . The hinge 5 has a first edge 51 adjacent to the case cover 4 and a second edge 52 adjacent to the side plate 2, and the first edge 51 and the second edge 52 of the hinge 5 are respectively provided with a first main body hinge portion 511 and the second body hinge 521 . The hinged part 411 of the case cover is hinged with the first hinged part 511 of the main body, and the hinged part 211 of the side plate is hinged with the hinged part 521 of the second main body.

In addition, in order to make the box cover 4 close on the top opening better, it is preferable to be provided with a groove opening upward and towards the inside of the box on the inner side of the other top in a pair of opposite side plates 2, so that A second edge 42 for receiving the lid 4 in use.

In the illustrated embodiment, the above-mentioned pair of side panels 2 is the longer side panel of the two pairs of opposite side panels, and the other pair of side panels 3 (also called short side panels or second side panels) is The shorter short side panels, the case cover 4 is hinged on the top 21 of one of the long side panels 2 . However, it should be understood that the case cover 4 can also be hinged to the top end 3 of one of the short side panels through a hinge without departing from the scope of the present invention.

In the specific embodiment shown in FIG. 2 , the lid hinge 411 includes a plurality of lid extensions 4111 spaced apart from each other, and each lid extension 4111 extends from the edge 41 of the lid 4 along the plane where the lid 4 is located. Extend horizontally, and each cover extension 4111 is provided with a hinge hole 4112 , and the hinge hole 4112 generally extends along the direction of the first edge 41 . The side panel hinge 211 includes a plurality of side panel extensions 2111 spaced apart from each other, each side panel extension 2111 extends upward from the top 21 of the side panel 2 along the plane where the side panel 2 is located, and each side panel protrudes The part 2111 is provided with a hinge hole 2112 extending generally along the direction of the top end 21 of the side plate 2 . The first body hinge part 511 and the second body hinge part 512 respectively include a plurality of first body extensions 5111 and second body extensions 5121 spaced apart from each other, and each first body extension 5111 is provided with a hinge Hole 5112 , each second body extension 5121 is provided with a hinge hole 5122 . The hinge holes 5112 and 5122 extend approximately in the direction of the edges 51 and 52 of the hinge body 5 respectively. Preferably, each hinge hole 4112 is aligned with each other, and each hinge hole 5112 is also aligned with each other, so when each lid extension 4111 and each first main body extension 5111 are placed alternately, each hinge hole 4112 and each hinge hole 4112 are aligned with each other. The hinge holes 5112 are aligned with each other, so that the hinge between the hinge member 5 and the box cover 4 can be realized by passing the first hinge shaft 53 through each hinge hole 4112 and each hinge hole 5112 . Preferably, each hinge hole 2112 is aligned with each other, and each hinge hole 5122 is also aligned with each other, so when each side panel extension 2111 and each second main body extension 5121 are alternately placed with each other, each hinge hole 2112 and each hinge hole 2112 are aligned with each other. The hinge holes 5122 are also aligned with each other, so that the hinge between the hinge member 5 and the side plate 2 can be realized by passing the second hinge shaft 54 through each hinge hole 2112 and each hinge hole 5122 . More preferably, the first edge 51 and the second edge 52 of the hinge 5 are parallel to each other. In this way, after the box cover 4 is hinged to the side panel 2 via the hinge 5 , the first hinge axis 53 and the second hinge axis 54 are parallel to each other.

Preferably, the first body hinge portion 511 of the hinge member 5 is provided with a plurality of grooves 512 spaced apart from each other along the first edge 51, at least a part of the lid hinge portion 411 of the lid 4, specifically the lid hinge portion Each case cover extension 4111 of 411 is located in the groove 512 . Preferably, when the lid 4 closes the opening of the collapsible container 100 , each lid extension 4111 fits snugly in each groove 512 , thereby further ensuring the closure of the opening.

In addition, in an unshown embodiment, it can be set that one of the case cover extension 4111 and the first main body extension 5111 is provided with a hinge shaft, while the other is provided with a hinge for cooperating with the hinge shaft. Holes, so that the hinge of the box cover 4 and the hinge 5 can be realized by fitting the hinge shaft into the hinge hole. Alternatively or additionally, it can be set that one of the side plate extension 2111 and the second main body extension 5121 is provided with a hinge shaft, while the other is provided with a hinge hole for matching with the hinge shaft, so that the The hinge shaft fits into the hinge hole to realize the hinge connection between the side plate 2 and the hinge member 5 .

Of course, it should be understood that the hinge between the box cover 4 and the hinge 5 and the hinge between the side plate 2 and the hinge 5 are not limited to the above-mentioned methods, and other conventional hinge methods in this field can also be used, for example, through flexible reduction. The thin portions are hinged to each other without departing from the scope of the invention. In the present invention, when the case cover 4 is hingedly connected with the side plate 2 through the hinge 5, the case cover 4 can rotate more than 270° relative to the side plate 2 around the top of the side plate 2, as shown in FIG. 5 . When the foldable box 100 is in use, the box cover 4 is perpendicular to the side panel 2 and closes the opening of the foldable box 100 . When the collapsible box 100 is in the storage state, the box cover 4 can be rotated relative to the top of the side panel 2 to be placed on the outer surface of the side panel 2, so that after the other three side panels are folded and placed on the base 1, the Fold the side panel 2 and the box cover 4 and place them on the other three side panels. In this way, the foldable box 100 in the stored state is convenient for storage and transportation.

In the embodiment shown in the figure, the hinge 5 is a component separate from the side panel 2 and the case cover 4 , and the case cover hinge 411 is only provided along the case cover 4 at the first edge 41 . However, it should be understood that the hinge 5 may also be integrally formed with one or both of the side panel 2 and the box cover 4 without departing from the scope of the present invention. For example, as mentioned above, the hinge 5 may be hingedly connected to the top end 21 of the side panel 2 and/or the first edge 41 of the box cover 4 via a flexible thinned portion. Preferably, the thickness of the hinge member 5 is equal to the sum of the thicknesses of the side panel 2 and the case cover 4, so that when the case cover 4 is folded onto the outer surface of the side panel 2, it can be attached to the outer surface of the side panel 2 without protruding upwards .

When the foldable box 100 is in use, the size of the assembly formed by hinges 5 and the box cover 4 is matched with the size of the opening of the foldable box 100 , so that the opening of the foldable box 100 can be closed. And when the collapsible box 100 is in the storage state as shown in Figure 3, the side panel 2 is folded onto the base 1, and the case cover 4 is rotated and folded to the outside of the side panel 2, at this moment the case cover 4 is opposite to the first edge 41. The second edge 42 of the cover 4 does not extend beyond the bottom of the side panel 2, thereby ensuring that the second edge 42 of the box cover 4 does not exceed the outer edge of the base 1 in the folded state.

The box cover 4 shown in FIG. 2 has a plate-shaped main body, and the other three edges of the box cover 4 except the first edge 41 are operatively lapped on the top ends of the other side panel 2 and the two side panels 3 respectively. ,As shown in Figure 4.

In the foldable box 100 shown in FIG. 1 , the base 1 has a plate-shaped main body 11 and a pair of opposite side guards 12 extending upward from a pair of opposite edges of the plate-shaped main body 11 . FIG. 6A shows a collapsible box 100 with side panels 2 in a folded state. FIG. 6C shows a perspective view of the side plate 2 detached from the base 1 . 6D shows a partial enlarged view thereof. As shown in Figure 6D, the edge protection 12 is provided with a concave cavity 121 with an opening facing upwards and inwards. The upper part of the two side end walls of the concave cavity 121 is provided with a first base limit protrusion 1211, and the middle part of the concave cavity 121 is provided with a A base limiting portion 1212 integrally extending upward from the bottom wall of the cavity 121 and a base guiding portion 1213 located in the base limiting portion and opening toward the inside. The cross section of the base limiting part 1212 is "T" shaped, so that two elongated open grooves 1214 are formed on both sides and the sidewall of the cavity 121 . The base guide portion 1213 is a concave cavity extending longitudinally. The base guide portion 1213 extends upward (longitudinal) for a predetermined distance from a position that is a predetermined distance away from the base limiting portion. The bottom end of the side plate 2 is provided with a plurality of hinge extensions 22 extending downward and spaced apart from each other. When the side panel 2 stands upright with respect to the base 1 , the hinge extension 22 is accommodated in the concave cavity 121 . The hinge extension 22 includes two side plate limiting portions 221 extending downward from the side plate 2, and side plate hinge shafts 223 are arranged on opposite sides of the two side plate limiting portions 221, and the side plate hinge shafts 223 can Rotate and slide up and down in the groove 1214 to switch between the upright state and the folded state of the side plate 2 relative to the base 1 . A side plate guiding portion 222 is also provided between the two side plate limiting portions 221 . The side plate guide portion 222 is composed of a plate portion 222a connected between the two side plate limiting portions 221 and a guide block 222b extending perpendicular to the plate portion 222a. The guide part is slidably connected to the base guide part up and down. When the side plate 2 is in the upright state, the guide block 222b is engaged in the base guide portion 1213, thereby fixing the side plate 2 to the edge guard 12, as shown in the partial sectional view of FIG. 8 and the partial enlarged view of FIG. 8A. The structure of the base guide part 1213 and the structure of the side plate guide part 222 make when the side plate is in the folded state, the joint between the side plate and the base is in a flat state without a pit. When the side panel 2 is in the folded state, the first base limiting protrusion 1211 blocks the side panel limiting portion 221 to prevent the side panel 2 from being separated upward from the base 1 . 4 recesses 121 provided on the edge protection 12 and 4 hinge extensions 22 arranged at the bottom of the side plate 2 are shown in the figure, but it should be understood that any suitable number of recesses 121 and 22 can be provided as required. Hinge extension 22 .

Preferably, the box cover 4 is also provided with a locking mechanism for locking the box cover 4 to the side panel, and the locking mechanism is arranged on a part of the box cover 4 away from the first edge 41, so that the box cover 4 can be closed more firmly to the side panels.

The foldable box 100 of the present invention can also have a thermal insulation function by providing a thermal insulation layer in the base 1 , the side panels 2 and 3 and the box cover 4 . As shown in Figures 9 and 9A, 9B, each of the first side plate 2, the second side plate 3 and the case cover 4 has an inner plate and an outer plate welded to each other, and a Insulation. As shown in FIGS. 10 and 10A , an insulating layer 16 is also provided inside the plate-shaped main body 11 of the base 1 and the edge protection 2 . Each of the above-mentioned insulation layers can be a prefabricated insulation board, and then placed in the base, side panels and box cover, or after the base, side panels and box cover are made, they can be poured into the base, side panels and box cover by filling. It is realized by pouring thermal insulation material into the inside of the side panels and the box cover. The insulation material can be polyurethane foam, polystyrene board, phenolic foam, etc.

The internal structure at the top end 21 of the side panel 2 and the internal structure at the first edge 41 of the tank cover 4 are shown in the enlarged detail view of FIG. 9A . Wherein side plate 2 is formed by mutual welding of side plate outer plate 23 and side plate inner plate 24, and case cover 4 is formed by mutual welding of case cover outer plate 43 and case cover inner plate 44. The inside of the outer peripheral edge of the inner plate 24 of the side plate 2 is provided with a welding rib 25, and the welding rib 25 extends generally along the direction of the outer peripheral edge of the inner plate 24 and from the outer surface of the side plate inner plate 24 towards the inner surface of the side plate outer plate 23. extended and intended to be welded at the ends to the inner surface of the side panel outer panel 23. However, it should be understood that the welding rib 25 can also be arranged inside the outer peripheral edge of the side panel outer panel 23 and extend from the inner surface of the side panel outer panel 23 toward the outer surface of the side panel inner panel 24 and be used for welding to the side panel inner panel at the end 24 outer surfaces. It should also be understood that welding ribs 25 can be provided inside the outer peripheral edge of the side panel outer panel 23 and the outer peripheral edge inner side of the side panel inner panel 24 , and the ends of the welding ribs 25 are welded to each other. Preferably as shown in the figure, the side plate 2 is provided with two welding ribs 25 parallel to each other and spaced apart from each other. In the case where the side panel 2 and the box cover 4 of the collapsible box 100 are made of plastic material, the welding between the welding rib 25 and the outer surface of the inner panel 24, the inner surface of the outer panel 23 or another welding rib 25 It is realized by ultrasonic welding to better achieve the tightness of the weld seam. In the internal space surrounded by the inner plate 23 , the outer plate 24 and the welding rib 25 , an insulating layer 26 is provided. The arrangement of the two welding ribs 25 spaced apart can further ensure the airtightness of the space enclosed by the outer plate, the inner plate and the welding ribs relative to the outside. In addition, for the convenience of manufacture, preferably, the above-mentioned side plate engaging portion and side plate hinge portion are integrally formed on the outer plate 23 .

The side plate 3 can also be welded by an outer plate 30 and an inner plate 31, and an insulating layer 36 is filled therebetween. Its specific structure is the same as that of the side plate 2 and will not be repeated here.

In the case where two welding bars 25 are provided, an airtight cavity is provided on the top of the side plate 2 , and the airtight cavity is jointly formed by the two welding bars 25 , the inner plate 24 and the outer plate 23 .

Also as shown in FIG. 9A , the outer peripheral edge of the outer plate 43 of the case cover 4 is provided with a welding rib 45 , and the welding rib 45 extends generally along the direction of the outer peripheral edge of the outer plate 43 and from the inner surface of the outer plate 43 of the case cover toward the case. The outer surface of the lid inner panel 44 extends and is adapted to be welded to the outer surface of the tank lid inner panel 44 at the ends. But it should be understood that the welding rib 45 can also be arranged on the inside of the outer periphery of the inner panel 44 of the lid and extend from the outer surface of the inner panel 44 towards the inner surface of the outer panel 43 of the lid and be used for welding to the outer panel of the lid at the end 43 inner surfaces. It should also be understood that welding ribs 45 may be provided inside the outer peripheral edge of the case cover outer plate 23 and the outer peripheral edge of the case cover inner plate 24 , and the ends of the welding ribs 45 are welded to each other. Preferably as shown in the figure, the box cover 4 is provided with two welding ribs 45 parallel to each other and spaced apart from each other. In the case where the lid 4 of the collapsible box 100 is made of plastic material, the welding between the welding rib 25 and the outer surface of the inner panel 44, the inner surface of the outer panel 43 or another welding rib 45 is done by ultrasonic welding. Realized, in order to better achieve the tightness of the weld seam. In the internal space surrounded by the outer plate 43 , the inner plate 44 and the welding rib 45 , an insulating layer 46 is provided. The arrangement of two welding ribs 45 spaced apart can further ensure the airtightness of the space enclosed by the outer plate, the inner plate and the welding ribs relative to the outside.

FIG. 12 shows a bottom exploded perspective view of the tank cover 4 . The lid 4 has four edges 41 , 42 , 47 and 48 . Preferably, the first edge 41 is provided with a lid hinge 4111 , and the outer panel 43 at the second edge 42 extends beyond the inner panel 44 and overlaps the inner side of the side panel 2 when the lid is put on. Specifically, as shown in FIG. 4B , an edge 4a can be provided on the edge of the outer plate 43 , and a groove 2a with an opening facing upward is provided on the inner top of the side plate 2 , and the edge 4a can be inserted into the groove 2a. In another embodiment, the outer panel at the second edge 42 is flush with the inner panel. Whereas at the other two edges 47 and 48 the outer panel 43 extends beyond the inner panel 44 . Preferably, when the foldable box 100 is in use, the part of the outer panel 43 extending beyond the inner panel 44 overlaps the side panel 3 .

FIG. 9B shows a cross-sectional view at the edge 12 of the base 1 . 10 and 10A show an exploded view and an enlarged detail of the base 1 . It can be seen from the figure that the base 1 is formed by welding the base body 14 and the base bottom plate 15 together. The base body 14 is provided with a plate-shaped body cavity 142 opening downward and two pairs of opposite edge-protecting cavities 143 , the plate-shaped body cavity 142 and the edge-protecting cavities 143 are separated from each other by a base welding rib 141 . Base body 14 comprises base plate 145, and base plate 145 is rectangular, and edge protection 12 is formed by edge protection inner plate 124 and edge protection outer plate 123, and edge protection inner plate 124 and edge protection outer plate 123 form the inner surface and outer surface of edge protection 12 respectively. surface. The edge protection inner panel 124 extends upward from the edge of the edge protection base plate 145 , and the base welding rib 141 extends downward from the edge of the edge protection base plate 145 and is used for welding to the upper surface of the base bottom plate 15 . The lower end of the edge protection outer plate 123 is also welded to the upper surface of the base bottom plate 15 , preferably welded to the edge of the upper surface of the base bottom plate 15 . The edge protection inner plate 124 , the edge protection outer plate 123 and the base welding rib 141 jointly form an edge protection cavity 143 , while the base substrate 145 and the base welding rib 141 jointly form a plate-shaped body cavity 142 . Insulation layers are respectively provided in the edge protection cavity 143 and the plate-shaped main body cavity 142 . In addition, as mentioned above, the edge protection 12 is also provided with a plurality of concave cavities 121 , and the part between the concave cavities 121 in the edge protection 12 is also provided with a thermal insulation layer. Insulation is usually made of lightweight foam.

The collapsible box 100 with the above structure has good thermal insulation performance and can be used for storing fresh products.

According to the present invention, in order to better form sealing and heat preservation, a sealing structure can also be provided on the collapsible box 100 . Specifically as shown in Figures 14-22A, in the foldable box 100, at the connection between the box cover 4 and the side panels 2 and 3, the connection between the base 1 and the side panels 2 and 3, and the side panels The joints between the panels 2 and 3 are provided with seals, so as to realize the sealing of the inside of the collapsible box 100 relative to the outside.

As shown in FIG. 19 , the sealing member 401 between the case cover 4 and the side plates 2 and 3 is arranged on the outer periphery of the bottom side of the case cover 4 and is fixedly connected to the case cover 4 . Specifically, the sealing member 401 is in the shape of a rectangular ring with two pairs of opposite sides. The seal 401 is attached to the outer edge of the inner panel 44 of the tank cover 4 . The seal 401 can be connected to the outer edge of the inner plate 44 in any suitable manner, for example, some protrusions can be set on the outer edge of the inner plate 44, and several matching grooves can be set on the seal 401, so that the seal 401 snap-fit to the inner plate 44 , or several protrusions are provided on the seal 401 , and recesses of corresponding shapes are provided on the edge of the inner plate 44 for accommodating the above-mentioned protrusions. It is also conceivable to provide protrusions on the seal 401 and corresponding grooves on the outer edge of the inner panel 44 to receive and retain said protrusions.

In a preferred embodiment, the seal 401 of the case cover 4 has a seal body 4011 and at least one row of installation posts 4012 protruding from the seal body 4011 , and buckles are provided at the ends of the installation posts 4012 . The case cover 4 is provided with corresponding installation holes, and the buckles are snapped into the installation holes to install the seal on the case cover.

In the preferred embodiment shown in Fig. 20, in the use state of the collapsible box 100, when the lid 4 is closed at the top opening, a pair of side edges of the sealing member 401 at the edges 47 and 48 extend beyond the side panel 3. The outer edge of the inner panel, while the side at the edge 42 is operatively abutting against the side panel 2 . Preferably, the inner side of the top end of the side plate 2 that is not hinged with the box cover 4 is provided with a groove 2a that opens upward and faces the inside of the box body, and the card edge 4a of the sealing member 401 at the edge 42 is operatively against The groove 2a, see Fig. 20B.

FIG. 20A shows a partial enlarged sectional view of the box cover 4 and one of the side panels 2 hinged by the hinge 5 . As shown in Figures 21, 22 and 22A, a hinge seal 501 is connected to the underside of the hinge 5, and the first side 5011 of the hinge seal 501 is operatively against the side plate 2, wherein the first The side 5011 is the side of the hinge seal 501 away from the box cover 4 . Preferably, the second side 5011 of the hinge seal 501 adjacent to the case cover 4 at least partially overlaps with the seal 401 on the case cover 4 .

The side panels 2 and 3 are also provided with seals 201 and 301 respectively, the seal 201 of the side panel 2 is shown in Figures 15 and 15A, and the seal 301 of the side panel 2 is shown in Figures 16 and 16A. The side plate 2 with its seal 201 and the side plate 3 with its seal 301 are further shown in FIGS. 17 and 18 , respectively.

As mentioned above, the bottom ends of the side plates 2 are provided with hinge extensions 22 for forming a hinged connection with the cavity 121 on the base 1 . Preferably, a hinge extension 32 is also provided at the bottom end of the side panel 3, and in order to hinge the side panel 3 to the base 1, edge guards 16 are also provided on a corresponding pair of edges of the base 1, as shown in FIG. 14 shown. A concave cavity 161 is also provided in the edge protection 16 . The concave cavity 161 and the hinge extension 32 can respectively adopt the same structure as the concave cavity 121 and the hinge extension 22 , which will not be repeated here.

In the embodiment shown in FIGS. 17 and 18 , the sealing member 201 of the side plate 2 is only located at the bottom of the side plate 2 , while the sealing member 301 of the side plate 3 has a substantially rectangular ring shape, including four edge part. Thus, the sealing between the side plate 2 and the side plate 3 is achieved by the left and right side edge portions of the seal member 301 of the side plate 3 . However, it should be understood that the sealing member 201 of the side plate 2 may also be arranged in a substantially rectangular ring shape, including parts respectively located at the four edges of the side plate 2, while the sealing member 301 of the side plate 3 is only located at the bottom of the side plate 3, The sealing between the side plate 2 and the side plate 3 is thus realized by the left and right edges of the sealing member 201 of the side plate 2 .

As shown in Figure 17, the seal 201 at the bottom of the side plate 2 includes a plurality of "n"-shaped parts in the middle and half "n"-shaped parts on both sides, wherein the two legs of each n-shaped part respectively cover the corresponding The inner surfaces of the two adjacent side plate limiting portions 221 adjacent to the two hinge extensions 22, and the half “n” shaped parts on both sides cover the outer ends of the hinge extensions 22 on the left and right sides of the side plate 2 The inner side surface of the plate limiting portion 221 . Wherein the aforementioned "n"-shaped part and the half "n"-shaped part are individual seals separated from each other, the number of "n"-shaped parts is set according to the number of hinge protrusions 22 . Specifically, the sealing member 201 is located on the left, right, and lower sides of the hinge extension and extends beyond the left, right, and lower sides of the hinge extension. As a result, the gap between the left and right sides of the hinge extension and the base edge, and the gap between the hinge extension and the bottom of the concave cavity on the base edge can be effectively sealed, that is, the hinge extension is covered. gap between the top and the bottom of the cavity on the base guard. In one embodiment, vertical grooves 201a are formed on the left and right edges of the sealing element installed on the hinge extension part, and horizontal grooves 201b are formed on the lower edge, as shown in FIG. 8A .

The portion of the sealing member 301 located at the bottom of the side plate 3 has the same structure and will not be repeated here. The structure of the portion of the seal 301 extending beyond the left and right sides and the lower side of the hinge extension is shown in 18, which are protruding ribs 301a and 301b protruding relative to the main body of the seal. Seal 201 has a similar structure. The connection between the seals 201 and 301 and the side plates 2 and 3 may be in any suitable manner, refer to the above description about the installation of the seal 401 . In an embodiment not shown, the sealing element between the bottom of the side plate and the concave cavity of the base can also be arranged in the concave cavity of the base, or the sealing element can be arranged in both the bottom of the side plate and the concave cavity of the base. A seal between the bottom of the side panel and the base cavity is arranged to cover the gap between the hinge extension and the bottom of the cavity on the base guard.

As mentioned above, in a preferred embodiment, joints 202 and 302 are respectively provided at the longitudinal ends of the side panels 2 and 3, and when each side panel is upright relative to the base 1, each side panel 2 and the side panels The plates 3 are connected by engaging the engaging portions 202 and 302 with each other. The seal 301 is connected to the seam 302 of the side panel 3, and the seal 301 extends laterally beyond the seam 302 so as to abut against the side panel 2 when the side panel 2 and the side panel 3 are connected to each other in the use state of the collapsible box 100 to seal the seam between the two. The connection between the sealing member 301 and the joint portion 302 can be realized by any suitable method, for example, a plurality of protrusions spaced apart from each other are provided on the strip-shaped plate-shaped main body at the longitudinal edge of the sealing member 301, and on the side The plate engaging portion 302 is provided with a corresponding groove for operatively fixing the above-mentioned protrusion. In the case that the sealing member 201 includes parts located at four edges respectively, and the sealing member 301 is only located at the bottom of the side plate 3, the sealing member 201 is connected with the bite portion 202 of the side plate 2 and extends laterally beyond the bite portion 202, thereby When the foldable box 100 is in use, the side panel 2 and the side panel 3 can abut against the side panel 3 to seal the seam between them when they are connected to each other. A plurality of protrusions spaced apart from each other are provided on the elongated plate-shaped body at the longitudinal edge of the sealing member 201, and corresponding grooves are provided on the side plate engaging portion 202 for operatively fixing the above-mentioned protrusions .

The hinge 5 and its seal 501 are shown in FIG. 20 . FIG. 22 shows a perspective view of the hinge 5 and its seal 501 assembled together. An enlarged view of detail A of Fig. 22 is shown in Fig. 22A. The sealing member 501 is installed closely below the hinge member 5 . When the lid 4 closes the opening of the collapsible box 100 , the seal 501 at least partially overlaps the seal 401 of the lid 4 , thereby ensuring a seal at the seam between the lid 4 and the hinge 5 . The connection between the seal 501 and the hinge 5 may be in any suitable manner, refer to the above description about the installation of the seal 401 .

The preferred embodiments of the present invention have been described in detail above, but it should be understood that aspects of the embodiments can be modified, if desired, to employ aspects, features and concepts of various patents, applications and publications to provide further embodiments.

These and other changes can be made to the embodiments in light of the above detailed description. In general, in the claims, the terms used should not be construed as limited to the specific embodiments disclosed in the specification and claims, but rather should be understood to include all possible embodiments, along with all equivalents to which such claims are entitled. scope.

Claims (19)

1. A collapsible box having a box body and a box cover, wherein the box body has a base and a pair of opposing first side panels foldably connected to the base and a pair of opposing The second side plate, one edge of the box cover is hinged to the top of the box body, it is characterized in that the connection between the box cover and the first side plate and the second side plate, the A sealing member is provided at the joint between the base and the first side plate and the second side plate, and the joint between the first side plate and the second side plate. 2. The foldable box according to claim 1, wherein the seals between the box cover and the first side panel and the second side panel are arranged on the outer periphery of the bottom side of the box cover And fixedly connected to the box cover. 3. The collapsible box according to claim 1, wherein the lid is welded by an inner panel and an outer panel, and the outer panels at a pair of opposite edges of the lid extend out of the The edge of the inner panel, one edge in the other pair of opposite edges is provided with a box cover hinge, the outer panel at the other edge is flush with the inner panel or also extends beyond the edge of the inner panel, and the box cover is The seal is attached to the inner plate. 4. The foldable box according to claim 1, wherein the box cover is further configured such that, when the box cover is covered, the outer panel of the box cover extends beyond the edge of the inner panel. The part is overlapped on the second side plate. 5. The collapsible box according to claim 1, wherein the sealing member of the box cover is an annular member having two pairs of opposite sides, and a pair of opposite sides of the sealing member of the box cover A side extends beyond the outer edge of the inner panel of the second side panel, and one of another pair of opposing sides is operable to abut the first side panel. 6. The collapsible box according to claim 1, wherein the lid is hinged to one of a pair of opposing first side panels, and the other of the pair of opposing first side panels The inner side of the top end is provided with a groove opening upwards and towards the interior of the case against which a portion of the seal of the case lid is operatively abutted. 7. The collapsible box according to claim 1, wherein the seal of the lid has a seal body and at least one row of mounting posts protruding from the seal body, the ends of the mounting posts are provided with Buckle, the box cover has a corresponding installation hole, and the buckle is buckled into the installation hole. 8. The foldable box according to claim 1, wherein the first edge of the cover is hinged to the top end of one of the pair of first side panels through a hinge, and the cover of the cover The first edge is provided with a box cover hinge, and the top end of one of the pair of first side panels is provided with a side panel hinge, wherein the first edge and the second edge of the hinge are respectively provided with a first a main body hinge and a second main body hinge, the lid hinge and the first main body hinge are mutually hinged, and the side plate hinge and the second main body hinge are mutually hinged, wherein the hinge A hinge seal is attached to the underside of the hinge seal, the first side of the hinge seal being operable to abut against the first side panel. 9. The collapsible case of claim 8, wherein a second side of the hinge seal, opposite the first side, overlaps the seal on the lid. 10. The collapsible box according to claim 1, characterized in that, the left and right side edges of the plate-shaped main body of the second side plate are provided with side plate joints, and the side plate joints are connected with side plate seals member, the side panel seal extending beyond the side panel bite. 11. The collapsible box according to claim 10, characterized in that, the side panel seal has a strip-shaped plate-shaped main body, and a plurality of protrusions spaced apart from each other are provided on the strip-shaped plate-shaped main body , the side plate engaging portion is provided with a corresponding groove, and the protrusion on the elongated plate-shaped main body is operatively fixed in the groove. 12. The collapsible box according to claim 1, wherein the first side panel and the second side panel both have a plate-shaped main body and spaced apart parts extending from the lower part of the plate-shaped main body. a plurality of hinge extensions, the base has a plate-shaped main body and two pairs of opposite side guards extending upward from two pairs of opposite edges of the plate-like main body, the side guards are provided with openings facing upward and towards the inside of the box A cavity, wherein the hinge extension is fitted with a seal and/or the cavity of the base is fitted with a seal. 13. The collapsible box according to claim 12, wherein the sealing member installed on the hinge extension is located on the left, right and lower sides of the hinge extension and extends beyond the hinge extension. the left and right sides and the bottom of the head. 14. The collapsible box according to claim 1, wherein the base has a plate-shaped body and a pair of opposite side guards extending upwardly from a pair of opposite edges of the plate-like body, the side guards are provided with There is a concave cavity with an opening facing upwards and towards the inside of the box body, and the middle part of the concave cavity is provided with a base limiting part extending upwards from the bottom wall of the concave cavity; the first side plate and the second side plate Each has a plate-shaped main body and a plurality of mutually spaced hinge extensions extending from the lower part of the plate-shaped main body, and the left and right side edges of the plate-shaped main body of the first side plate and/or the second side plate A seal is installed, and the bottom end of each hinge extension is provided with a side plate hinge shaft, wherein the side plate hinge shaft cooperates with the base limit portion, and the seal installed on the hinge extension is located The left and right sides and the lower side of the hinge extension part extend beyond the left and right sides and the lower side of the hinge extension part. 15. The collapsible box according to any one of claims 12-14, characterized in that vertical grooves and/or lower edges are provided on the left and right edges of the seal installed on the hinge extension. There are transverse grooves. 16. The foldable box according to any one of claims 12-14, characterized in that, the edge protection is further provided with a base guide part located in the base limiting part and opening towards the inside, each of the hinges The extension part is also provided with a side plate guide part located between the hinge shafts of the side plates, and the side plate guide part is connected to the base guide part so as to be slidable up and down. 17. The foldable box according to claim 16, wherein the base limiting part is a plate-shaped part, the base guiding part is a groove provided in the middle of the base limiting part, and The upper part of the two side walls of the concave cavity is provided with a first base limiting protrusion. 18. The foldable box according to any one of claims 12-14, wherein the hinge extension part has a plate-shaped body, and the hinge axis of the side plate extends from the left and right sides of the bottom end of the plate-shaped body Extending toward a direction parallel to the side plate, the side plate guide portion is a guide block extending from the plate-shaped main body in a direction perpendicular to the plate-shaped main body. 19. The collapsible box according to claim 1, wherein each of the first side panel, the second side panel and the box cover is welded by an inner panel and an outer panel, An insulating layer is provided between the inner plate and the outer plate; and the base has a plate-shaped body and an edge protection extending upward from the periphery of the plate-shaped body, and the plate-shaped body and the edge protection are both An insulation layer is provided.