CN220263469U - Waterproof insect-proof carton - Google Patents

Abstract

The utility model relates to the field of cartons, in particular to a waterproof insect-proof carton which comprises an outer box and an inner box, wherein the outer box comprises a bottom plate, a left side plate, a right side plate, a front side plate and a rear side plate; the left waterproof board is connected with the adjacent edges of the front side board and the rear side board in a folding way, and a first inclined crease is arranged between one corner of the left waterproof board adjacent to the bottom board and the other corner far away from the bottom board; the right waterproof board is connected with the adjacent edges of the front side board and the rear side board in a folding way, and a second inclined crease is arranged between one corner of the right waterproof board adjacent to the bottom board and the other corner far away from the bottom board; the left waterproof board and the right waterproof board are square. Through above-mentioned filling shutoff to cardboard gap, realize waterproof protection against insects of carton.

Description

Waterproof insect-proof carton

Technical Field

The utility model relates to the field of cartons, in particular to a waterproof insect-proof carton.

Background

On the folding design of carton, ordinary carton takes folding between a plurality of curb plates as the example, has the clearance easily between the adjacent curb plate after folding, and the existence of clearance leads to steam, insect etc. easily to get into in the box and cause the threat to the product in the box, so need carry out multilayer protection to the product in the carton, not only occupy the carton inner space like this, also inconvenient getting of product put simultaneously.

Disclosure of Invention

The technical problems to be solved by the utility model are as follows: the waterproof insect-proof carton can seal gaps among the carton paperboards to prevent invasion of foreign matters such as water vapor, insects and the like.

In order to solve the technical problems, the utility model adopts the following technical scheme: the waterproof insect-proof carton comprises an outer box and an inner box, wherein the outer box comprises a bottom plate, a left side plate, a right side plate, a front side plate and a rear side plate, the lower side of the bottom plate is sequentially connected with the front side plate and the inner box in a folding manner, the upper side of the bottom plate is connected with the rear side plate in a folding manner, the left side of the bottom plate is connected with the left side plate in a folding manner, and the right side of the bottom plate is connected with the right side plate in a folding manner; the left waterproof board is connected with the adjacent edges of the front side board and the rear side board in a folding way, and a first inclined crease is arranged between one corner of the left waterproof board adjacent to the bottom board and the other corner far away from the bottom board; the right waterproof board is connected with the adjacent edges of the front side board and the rear side board in a folding way, and a second inclined crease is arranged between one corner of the right waterproof board adjacent to the bottom board and the other corner far away from the bottom board; the left waterproof board and the right waterproof board are square.

Further, the outer box further comprises a left inserting plate, a square notch is formed in one corner, far away from the bottom plate, of each left waterproof plate, and a first inserting opening is formed in the edge, perpendicular to the left side plate, of each square notch; the left inserting plate is connected to one side, far away from the bottom plate, of the left side plate in a folding mode, and a first inserting sheet is arranged on the left inserting plate corresponding to the first inserting opening.

Further, the outer box further comprises a right inserting plate, a square notch is formed in one corner, far away from the bottom plate, of each right waterproof plate, and a second inserting opening is formed in the edge, perpendicular to the right side plate, of each square notch; the right inserting plate is connected to one side, far away from the bottom plate, of the right side plate in a folding mode, and a second inserting sheet is arranged on the right inserting plate corresponding to the second inserting opening.

Further, the inner box comprises an inner box bottom plate, an inner box left side plate, an inner box right side plate and an inner box front side plate; the upper side of the inner box bottom plate is connected with the front side plate in a folding way, the left side of the inner box bottom plate is connected with the left side plate of the inner box in a folding way, the right side of the inner box bottom plate is connected with the right side plate of the inner box in a folding way, and the lower side of the inner box bottom plate is connected with the front side plate of the inner box in a folding way.

Further, the inner box further comprises an inner box left waterproof plate, and the inner box left waterproof plate is connected to the lower side of the inner box left side plate in a folding mode.

Further, the inner box further comprises an inner box right waterproof plate, and the inner box right waterproof plate is connected to the lower side of the inner box right side plate in a folding mode.

Further, the inner box further comprises a left fixing plate, a right fixing plate and a front fixing plate, wherein the left fixing plate is connected to one side, far away from the bottom plate of the inner box, of the left side plate of the inner box in a folding way, and a third socket is formed in one side, far away from the bottom plate of the inner box, of the left fixing plate; the right fixing plate is connected to one side, far away from the bottom plate of the inner box, of the right side plate of the inner box in a folding way, and a fourth socket is formed in one side, far away from the bottom plate of the inner box, of the right fixing plate; the front fixing plate is connected to one side, far away from the bottom plate of the inner box, of the front side plate of the inner box in a folding mode, and a third inserting sheet and a fourth inserting sheet matched with the third inserting opening and the fourth inserting opening are respectively arranged on two sides of the front fixing plate.

The utility model has the beneficial effects that: the inner box and the outer box are connected, so that the inner box can be protected against water and insect by the outer box, and damage to the inner box and products in the inner box is avoided; gaps are reserved between adjacent side plates when the common paper box is folded, and the gaps between the adjacent side plates can be blocked when the paper box is folded by adopting the left waterproof plate and the right waterproof plate; the left waterproof plate and the right waterproof plate are designed to be inclined folds and square, so that the left waterproof plate and the right waterproof plate can be conveniently folded and then can be attached to the left side plate and the right side plate, and occupation of the inner space of the formed outer box is avoided.

Drawings

Fig. 1 is an expanded view of a waterproof and insect-resistant carton of an embodiment of the present utility model.

Description of the reference numerals:

1. a bottom plate; 2. a left side plate; 3. a right side plate; 4. a front side plate; 5. a rear side plate; 6. a left waterproof board; 61. a first oblique crease; 62. a first socket; 7. a right waterproof board; 71. a second oblique crease; 72. a second socket; 8. a left plugboard; 81. a first insert sheet; 9. a right plugboard; 91 a second insert sheet; 101. an inner box bottom plate; 102. the left side plate of the inner box; 103. the right side plate of the inner box; 104. an inner box front side plate; 105. the left waterproof board of the inner box; 106. the right waterproof board of the inner box; 107. a left fixing plate; 1071. a third socket; 108. a right fixing plate; 1081. a fourth socket; 109. a front fixing plate; 1091. a third insert sheet; 1092. and a fourth insert sheet.

Detailed Description

In order to describe the technical contents, the achieved objects and effects of the present utility model in detail, the following description will be made with reference to the embodiments in conjunction with the accompanying drawings.

Referring to fig. 1, a waterproof and insect-proof carton comprises an outer box and an inner box, wherein the outer box comprises a bottom plate 1, a left side plate 2, a right side plate 3, a front side plate 4 and a rear side plate 5, the lower side of the bottom plate 1 is sequentially connected with the front side plate 4 and the inner box in a folding manner, the upper side of the bottom plate 1 is connected with the rear side plate 5 in a folding manner, the left side of the bottom plate 1 is connected with the left side plate 2 in a folding manner, and the right side of the bottom plate 1 is connected with the right side plate 3 in a folding manner; the left waterproof board 6 is connected with the adjacent edges of the left side board 2, the front side board 4 and the rear side board 5 in a folding way, and a first inclined crease 61 is arranged between one corner of the left waterproof board 6 adjacent to the bottom board 1 and the other corner far away from the bottom board 1; the edges of the right side plate 3 adjacent to the front side plate 4 and the rear side plate 5 are connected with a right waterproof plate 7 in a folding way, and a second inclined crease 71 is arranged between one corner of the right waterproof plate 7 adjacent to the bottom plate 1 and the other corner far away from the bottom plate 1; the left waterproof board 6 and the right waterproof board 7 are square.

From the above description, the beneficial effects of the utility model are as follows: the inner box and the outer box are connected, so that the inner box can be protected against water and insect by the outer box, and damage to the inner box and products in the inner box is avoided; gaps are reserved between adjacent side plates when the normal carton is folded, and the gaps between the adjacent side plates can be blocked when the carton is folded by adopting the left waterproof plate 6 and the right waterproof plate 7; the oblique crease design and square design of the left waterproof plate 6 and the right waterproof plate 7 are convenient for the left and right side plates 3 to be attached after being folded so as to avoid occupation of the inner space of the formed outer box.

Specifically, the front side plate 4 and the rear side plate 5 are respectively folded toward the bottom plate 1 at folding, and the left side plate 2 and the right side plate 3 are folded toward the bottom plate 1 such that the front side plate 4, the rear side plate 5, the left side plate 2 and the right side plate 3 are all perpendicular to the bottom plate 1; at this time, the two left waterproof plates 6 and the two right waterproof plates 7 are folded in half and attached to the corresponding side plates under the action of the oblique folds, and thereafter, the inner box is folded and buckled into the structure formed by winding the front side plate 4, the rear side plate 5, the left side plate 2 and the right side plate 3.

Further, the outer box further comprises a left inserting plate 8, a square notch is arranged on one corner of the two left waterproof plates 6 far away from the bottom plate 1, and a first inserting opening 62 is arranged on the edge of the square notch perpendicular to the left side plate 2; the left inserting plate 8 is connected to one side of the left side plate 2, which is far away from the bottom plate 1, and a first inserting sheet 81 is arranged on the left inserting plate 8 corresponding to the first inserting opening 62.

As can be seen from the above description, gaps between the different paperboards likewise occur between the side panels and the bottom panel 1; when the inner box is placed on the bottom plate 1 of the outer box, the left side plate 2 propped against the side surface of the inner box can fold the left inserting plate 8 towards the inner box through the left side plate, so that the left inserting plate 8 can fill and seal a gap between the left side plate 2 and the side surface of the inner box; the first inserting sheet 81 of the left inserting plate 8 is matched and fixed with the first inserting openings 62 of the two left waterproof plates 6 at the same time so as to avoid the separation; the square notch design enables the first socket 62 of the folded left flashing 6 to better mate with the left insert panel 8.

Further, the outer box further comprises a right inserting plate 9, a square notch is arranged on one corner of the two right waterproof plates 7 far away from the bottom plate 1, and a second inserting opening 72 is arranged on the edge of the square notch perpendicular to the right side plate 3; the right inserting plate 9 is connected to one side of the right side plate 3, which is far away from the bottom plate 1, and a second inserting sheet 91 is arranged on the right inserting plate 9 corresponding to the second inserting opening 72.

As can be seen from the above description, gaps between the different paperboards likewise occur between the side panels and the bottom panel 1; when the inner box is placed on the bottom plate 1 of the outer box, the right side plate 3 propped against the side surface of the inner box can fold the right plugboard 9 towards the inner box through the right side plate, so that the right plugboard 9 can fill and seal a gap between the right side plate 3 and the side surface of the inner box; the second inserting sheet 91 of the right inserting plate 9 is matched and fixed with the second inserting openings 72 of the two right waterproof plates 7 at the same time so as to avoid the falling out; the square notch is designed so that the second socket 72 of the folded right waterproof board 7 can be matched with the left plugboard 8 better.

Further, the inner box includes an inner box bottom plate 101, an inner box left side plate 1022, an inner box right side plate 1033, and an inner box front side plate 1044; the upper side of the inner box bottom plate 101 is in folding connection with the front side plate 4, the left side of the inner box bottom plate 101 is in folding connection with the inner box left side plate 1022, the right side of the inner box bottom plate 101 is in folding connection with the inner box right side plate 1033, and the lower side of the inner box bottom plate 101 is in folding connection with the inner box front side plate 1044.

As can be seen from the above description, the inner box is formed by folding an inner box bottom plate 101, an inner box left side plate 1022, an inner box right side plate 1033, and an inner box front side plate 1044; the inner box after the folding forming can be folded in half rapidly through the connection of the inner box bottom plate 101 and the front side plate 4 so as to be buckled on the bottom plate 1, and the arrangement of the inner box in the outer box is completed.

Further, the inner box further comprises an inner box left waterproof board 1056, and the inner box left waterproof board 1056 is connected to the lower side of the inner box left side board 1022 in a folding manner.

As is apparent from the above description, the inner box left waterproof board 1056 is made to be able to fill the gap between the inner box left side board 1022 and the inner box front side board 1044 by folding.

Further, the inner box further comprises an inner box right waterproof board 1067, and the inner box right waterproof board 1067 is connected to the lower side of the inner box right side board 1033 in a folding manner.

As is apparent from the above description, the inner box right waterproof board 1067 is enabled to fill and seal the gap between the inner box right side board 1033 and the inner box front side board 1044 by folding.

Further, the inner box further comprises a left fixing plate 107, a right fixing plate 108 and a front fixing plate 109, wherein the left fixing plate 107 is connected to one side of the left side plate 1022 of the inner box far from the bottom plate 101 of the inner box in a folding way, and a third socket 1071 is arranged on one side of the left fixing plate 107 far from the bottom plate 101 of the inner box; the right fixing plate 108 is connected to one side of the right side plate 1033 of the inner box far from the bottom plate 101 of the inner box in a folding way, and a fourth socket 1081 is arranged on one side of the right fixing plate 108 far from the bottom plate 101 of the inner box; the front fixing plate 109 is connected to the side of the inner box front side plate 1044 far away from the inner box bottom plate 101 in a folding manner, and the two sides of the front fixing plate 109 are respectively provided with a third inserting sheet 1091 and a fourth inserting sheet 1092 matched with the third inserting opening 1071 and the fourth inserting opening 1081.

As is clear from the above description, the front fixing plate 109 is designed to fill and close the gap between the inner box placed on the outer box bottom plate 1 and the front side plate 4; meanwhile, the cooperation of the left fixing plate 107, the right fixing plate 108 and the front fixing plate 109 can also enable a plurality of paperboards of the inner box to be connected integrally in a matched mode, and overall strength is improved; when the inner box is folded, the left fixing plate 107 and the inner box left side plate 1022 are sequentially folded towards the inner box bottom plate 101, so that the left fixing plate 107 is parallel to the inner box left side plate 1022 and perpendicular to the inner box bottom plate 101, and at the moment, a third inserting opening 1071 on the left fixing plate 107 is close to the inner box bottom plate 101; the right fixing plate 108 and the inner box right side plate 1033 are folded toward the inner box bottom plate 101 in the same manner; then, the front fixing plate 109 and the inner box front side plate 1044 are folded toward the inner box bottom plate 101 in sequence, so that the front fixing plate 109 is parallel to the inner box front side plate 1044 and perpendicular to the inner box bottom plate 101, and then the third inserting sheet 1091 and the fourth inserting sheet 1092 on both sides of the front fixing plate 109 can be inserted into the third inserting opening 1071 of the left fixing plate 107 and the fourth inserting opening 1081 of the right fixing plate 108 respectively, and the connection and fixation of a plurality of paperboards on the side surface of the inner box are completed.

Referring to fig. 1, a first embodiment of the present utility model is:

the application scene of the utility model is as follows: on the folding design of carton, there is the clearance easily between the adjacent curb plate after current conventional carton is folding, and the existence of clearance leads to steam, insect etc. easily to get into in the box and cause the threat to the product in the box, so need carry out multilayer protection to the product in the carton, not only occupy the carton inner space like this, also inconvenient getting of product put simultaneously.

As shown in fig. 1, the waterproof insect-proof carton of the present embodiment comprises an outer box and an inner box, wherein the outer box comprises a bottom plate 1, a left side plate 2, a right side plate 3, a front side plate 4, a rear side plate 5, a left plugboard 8 and a right plugboard 9.

The lower side of the bottom plate 1 is sequentially connected with the front side plate 4 and the inner box in a folding way, the upper side of the bottom plate 1 is connected with the rear side plate 5 in a folding way, the left side of the bottom plate 1 is connected with the left side plate 2 in a folding way, and the right side of the bottom plate 1 is connected with the right side plate 3 in a folding way; the left waterproof board 6 is connected with the adjacent edges of the left side board 2, the front side board 4 and the rear side board 5 in a folding way, and a first inclined crease 61 is arranged between one corner of the left waterproof board 6 adjacent to the bottom board 1 and the other corner far away from the bottom board 1; the edges of the right side plate 3 adjacent to the front side plate 4 and the rear side plate 5 are connected with a right waterproof plate 7 in a folding way, and a second inclined crease 71 is arranged between one corner of the right waterproof plate 7 adjacent to the bottom plate 1 and the other corner far away from the bottom plate 1; the left waterproof board 6 and the right waterproof board 7 are square.

A square notch is arranged on one corner of the two left waterproof plates 6 far away from the bottom plate 1, and a first socket 62 is arranged on the edge of the square notch perpendicular to the left side plate 2; the left inserting plate 8 is connected to one side of the left side plate 2, which is far away from the bottom plate 1, and a first inserting sheet 81 is arranged on the left inserting plate 8 corresponding to the first inserting opening 62.

A square notch is arranged on one corner of the two right waterproof plates 7 far away from the bottom plate 1, and a second socket 72 is arranged on the edge of the square notch perpendicular to the right side plate 3; the right inserting plate 9 is connected to one side of the right side plate 3, which is far away from the bottom plate 1, and a second inserting sheet 91 is arranged on the right inserting plate 9 corresponding to the second inserting opening 72.

The inner box includes an inner box bottom plate 101, an inner box left side plate 1022, an inner box right side plate 1033, an inner box front side plate 1044, an inner box left waterproof plate 1056, an inner box right waterproof plate 1067, a left fixing plate 107, a right fixing plate 108, and a front fixing plate 109.

The upper side of the inner box bottom plate 101 is in folding connection with the front side plate 4, the left side of the inner box bottom plate 101 is in folding connection with the inner box left side plate 1022, the right side of the inner box bottom plate 101 is in folding connection with the inner box right side plate 1033, and the lower side of the inner box bottom plate 101 is in folding connection with the inner box front side plate 1044.

The inner box left waterproof board 1056 is connected to the lower side of the inner box left side board 1022 in a folding manner. The inner box right waterproof board 1067 is connected to the lower side of the inner box right side board 1033 in a folding manner.

The left fixing plate 107 is connected to the side of the inner box left side plate 1022, which is far away from the inner box bottom plate 101 in a folding way, and a third socket 1071 is arranged on the side of the left fixing plate 107, which is far away from the inner box bottom plate 101; the right fixing plate 108 is connected to one side of the right side plate 1033 of the inner box far from the bottom plate 101 of the inner box in a folding way, and a fourth socket 1081 is arranged on one side of the right fixing plate 108 far from the bottom plate 101 of the inner box; the front fixing plate 109 is connected to the side of the inner box front side plate 1044 far away from the inner box bottom plate 101 in a folding manner, and the two sides of the front fixing plate 109 are respectively provided with a third inserting sheet 1091 and a fourth inserting sheet 1092 matched with the third inserting opening 1071 and the fourth inserting opening 1081.

The working principle of the utility model is as follows: when folding, the inner box is folded and formed. First, the left fixing plate 107 and the inner box left side plate 1022 are folded towards the inner box bottom plate 101 in sequence when folded, so that the left fixing plate 107 is parallel to the inner box left side plate 1022 and perpendicular to the inner box bottom plate 101, and at this time, the third jack 1071 on the left fixing plate 107 is close to the inner box bottom plate 101; the right fixing plate 108 and the inner box right side plate 1033 are folded toward the inner box bottom plate 101 in the same manner; then, the front fixing plate 109 and the inner box front side plate 1044 are folded towards the inner box bottom plate 101 in sequence, so that the front fixing plate 109 is parallel to the inner box front side plate 1044 and is perpendicular to the inner box bottom plate 101, and then the third inserting sheet 1091 and the fourth inserting sheet 1092 on two sides of the front fixing plate 109 can be respectively inserted into the third inserting opening 1071 of the left fixing plate 107 and the fourth inserting opening 1081 of the right fixing plate 108; at this time, the inner box is in a U-shaped structure.

Then folding the front side plate 4 and the rear side plate 5 toward the bottom plate 1, respectively, and folding the left side plate 2 and the right side plate 3 toward the bottom plate 1, so that the front side plate 4, the rear side plate 5, the left side plate 2 and the right side plate 3 are all perpendicular to the bottom plate 1; at this time, the two left waterproof boards 6 and the two right waterproof boards 7 are folded in half and attached to the corresponding side boards under the action of the inclined folds, and then the left plugboard 8 and the right plugboard 9 are inserted into the first jack 62 and the second jack 72 in a matched manner; after that, the inner box is folded and buckled into the structure formed by the outer windings of the front side plate 4, the rear side plate 5, the left side plate 2 and the right side plate 3, and then the combination of the outer box and the inner box can be completed. The left waterproof board 7, the right waterproof board 8 and the right waterproof board 9 on the outer box are folded to form a filling and plugging multi-board gap; the multi-paperboard gap is filled and blocked by adopting the design of the inner box left waterproof board 1056 and the inner box right waterproof board 1067 on the same inner box; through above-mentioned filling shutoff to cardboard gap, realize waterproof protection against insects of carton.

In summary, the waterproof insect-proof carton provided by the utility model adopts the connection design of the inner box and the outer box, so that the outer box can be used for waterproof insect-proof protection of the inner box, and damage to the inner box and products in the inner box is avoided; gaps are reserved between adjacent side plates when the common paper box is folded, and the gaps between the adjacent side plates can be blocked when the paper box is folded by adopting the left waterproof plate and the right waterproof plate; the left waterproof plate and the right waterproof plate are designed to be inclined folds and square, so that the left waterproof plate and the right waterproof plate can be conveniently folded and then can be attached to the left side plate and the right side plate, and occupation of the inner space of the formed outer box is avoided.

The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent changes made by the specification and drawings of the present utility model, or direct or indirect application in the relevant art, are included in the scope of the present utility model.

Claims (7)

1. The waterproof insect-proof carton is characterized by comprising an outer box and an inner box, wherein the outer box comprises a bottom plate, a left side plate, a right side plate, a front side plate and a rear side plate, the lower side of the bottom plate is sequentially connected with the front side plate and the inner box in a folding manner, the upper side of the bottom plate is connected with the rear side plate in a folding manner, the left side of the bottom plate is connected with the left side plate in a folding manner, and the right side of the bottom plate is connected with the right side plate in a folding manner; the left waterproof board is connected with the adjacent edges of the front side board and the rear side board in a folding way, and a first inclined crease is arranged between one corner of the left waterproof board adjacent to the bottom board and the other corner far away from the bottom board; the right waterproof board is connected with the adjacent edges of the front side board and the rear side board in a folding way, and a second inclined crease is arranged between one corner of the right waterproof board adjacent to the bottom board and the other corner far away from the bottom board; the left waterproof board and the right waterproof board are square.

2. The waterproof and insect-proof carton according to claim 1, wherein the outer box further comprises a left inserting plate, a square notch is arranged on one corner of the two left waterproof plates, which is far away from the bottom plate, and a first inserting opening is arranged on the edge of the square notch, which is perpendicular to the left side plate; the left inserting plate is connected to one side, far away from the bottom plate, of the left side plate in a folding mode, and a first inserting sheet is arranged on the left inserting plate corresponding to the first inserting opening.

3. The waterproof and insect-proof carton according to claim 2, wherein the outer box further comprises a right inserting plate, a square notch is arranged on one corner of the two right waterproof plates, which is far away from the bottom plate, and a second inserting opening is arranged on the edge of the square notch, which is perpendicular to the right side plate; the right inserting plate is connected to one side, far away from the bottom plate, of the right side plate in a folding mode, and a second inserting sheet is arranged on the right inserting plate corresponding to the second inserting opening.

4. The waterproof and insect-resistant carton of claim 1, wherein the inner box comprises an inner box bottom panel, an inner box left side panel, an inner box right side panel, and an inner box front side panel; the upper side of the inner box bottom plate is connected with the front side plate in a folding way, the left side of the inner box bottom plate is connected with the left side plate of the inner box in a folding way, the right side of the inner box bottom plate is connected with the right side plate of the inner box in a folding way, and the lower side of the inner box bottom plate is connected with the front side plate of the inner box in a folding way.

5. The waterproof and insect-resistant carton of claim 4, wherein the inner box further comprises an inner box left waterproof panel, the inner box left waterproof panel being foldably connected to an underside of the inner box left side panel.

6. The waterproof and insect-resistant carton of claim 5, wherein the inner box further comprises an inner box right waterproof panel, the inner box right waterproof panel being foldably connected to an underside of the inner box right side panel.

7. The waterproof and insect-proof carton according to claim 4, wherein the inner box further comprises a left fixing plate, a right fixing plate and a front fixing plate, the left fixing plate is connected to one side of a left side plate of the inner box far from the bottom plate of the inner box in a folding manner, and a third socket is formed on one side of the left fixing plate far from the bottom plate of the inner box; the right fixing plate is connected to one side, far away from the bottom plate of the inner box, of the right side plate of the inner box in a folding way, and a fourth socket is formed in one side, far away from the bottom plate of the inner box, of the right fixing plate; the front fixing plate is connected to one side, far away from the bottom plate of the inner box, of the front side plate of the inner box in a folding mode, and a third inserting sheet and a fourth inserting sheet matched with the third inserting opening and the fourth inserting opening are respectively arranged on two sides of the front fixing plate.