CN215852413U - Folding box - Google Patents

Abstract

The utility model discloses a folding box which comprises an upper frame, an upper cover plate and a lower cover plate, wherein the right end of the upper cover plate is rotatably connected to a right end frame body of the upper frame, the left end of the lower cover plate is rotatably connected to a left end frame body of the upper frame, the left end of the upper cover plate can be lapped on the right end of the lower cover plate, lock holes are formed in the opposite sides of the front frame and the rear frame of the upper frame, a knob lock is arranged at the left end of the upper cover plate and comprises a knob and a lock shaft, the knob is rotatably arranged at the left end of the upper cover plate, an arc-shaped groove is formed in the knob, the lock shaft can be arranged in the left end of the upper cover plate in a front-back sliding mode, and one end, close to the arc-shaped groove, of the lock shaft is slidably arranged in the arc-shaped groove. Through setting up the knob lock for the user only need stir the knob alright with folding box locking or the unblock that will expand or fold, the unblock facilitates the use, can improve user experience.

Description

Folding box

Technical Field

The utility model belongs to the technical field of carrying boxes, and particularly relates to a folding box.

Background

A wide variety of cases or cartons for holding articles for storage or transport are known in the art. These known boxes are made of various materials, such as cardboard, wood, metal and plastic.

When the containing box or the carrying box is not needed to be used, the box occupies a large space, and is inconvenient to store and place. The locking when current case can't be convenient folding and expansion uses inconveniently.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a folding box which is simple in structure, convenient to lock and unlock when folded, folded and unfolded and capable of improving user experience.

The utility model is realized by the following technical scheme:

the utility model provides a folding box, folding box includes upper ledge, upper cover plate and lower apron, the right-hand member of upper cover plate rotate connect in the right-hand member framework of upper ledge, the left end of lower apron rotate connect in the left end framework of upper ledge, the left end of upper cover plate can overlap joint in the right-hand member of lower apron, the opposite side of the preceding frame of upper ledge and back frame is equipped with the lockhole, the left end of upper ledge is equipped with the knob lock, the knob lock includes knob and lock axle, the knob is rotatable install in the left end of upper cover plate, be equipped with the arc wall on the knob, the lock axle slidable from beginning to end install in inside the left end of upper cover plate, and the one end slidable mounting that the lock axle is close to the arc wall in the arc wall, when anticlockwise rotating the knob, the lock axle is close to the one end of arc wall is in the arc wall slides, And when the knob is rotated clockwise, one end of the lock shaft close to the arc-shaped groove slides in the arc-shaped groove, so that one end of the lock shaft far away from the arc-shaped groove is separated from the lock hole.

As a further improvement of the above technical solution, the upper cover plate is provided with an avoiding groove at a middle position in the front-rear direction, the knob includes a body and a wrench fixed on the periphery of the body, the body is a circular plate, the wrench is an arc-shaped plate, the center of the body is rotatably fixed on the upper cover plate, the wrench is located in the avoiding groove and can rotate in the avoiding groove, the arc-shaped groove and the lock shafts are both provided with two arc-shaped grooves and two lock shafts symmetrically arranged with respect to the center of the body, and each end of the lock shaft close to the arc-shaped groove is fixed with a guide post which is slidably mounted in the arc-shaped groove, when the knob is rotated counterclockwise, the guide post slides in the arc-shaped groove, so that one end of the lock shaft away from the arc-shaped groove is matched with the lock hole, when the knob is rotated clockwise, the guide post slides in the arc-shaped groove, so that one end, far away from the arc-shaped groove, of the lock shaft is separated from the lock hole.

As a further improvement of the above technical solution, the lock shaft is further provided with a fastening tooth, the fastening tooth is parallel to the bottom surface of the upper cover plate, the lower cover plate is provided with a fastening edge matched with the fastening tooth, the left end of the upper cover plate is provided with an edge groove for accommodating the fastening edge, and after the folding box is locked, the fastening tooth is fastened to the fastening edge.

As a further improvement of the above technical solution, the knob lock further includes a fixing seat, the fixing seat is fixed to the bottom of the upper cover plate and located below the avoiding groove, the body is located between the fixing seat and the bottom of the upper cover plate, and the center of the body is rotatably installed on the fixing seat.

As a further improvement of the above technical solution, when the arc-shaped groove extends from the first end to the second end on the body, a distance from the arc-shaped groove to a center of the body decreases gradually, the first end is a position of the guide post in the arc-shaped groove when the lock shaft is fitted in the lock hole, and the second end is a position of the guide post in the arc-shaped groove when the lock shaft is disengaged from the lock hole.

As a further improvement of the above technical scheme, the left end of upper cover plate is equipped with first bandage hole, be equipped with second bandage hole on the body, be equipped with on the lower apron and dodge the position, work as rotating knob makes first bandage hole align with when the second bandage hole is bored, the lock axle cooperate in the lockhole, just this moment first bandage hole site in dodge the top of the right part in position.

As a further improvement of the above technical solution, the folding box further includes a bottom plate, a front long side plate, a rear long side plate, a left wide side plate and a right wide side plate, wherein the front long side plate and the rear long side plate include an upper plate and a lower plate, the upper plate and the lower plate are rotatably connected to each other, free ends of the lower plates of the front long side plate and the rear long side plate are respectively and correspondingly rotatably connected to a front end and a rear end of the bottom plate, free ends of the upper plates of the front long side plate and the rear long side plate are respectively and correspondingly rotatably connected to a front end frame body and a rear end frame body of the upper frame, and lower ends of the left wide side plate and the right wide side plate are respectively and correspondingly rotatably connected to a left end and a right end of the bottom plate.

As a further improvement of the technical scheme, the upper cover plate and the one end that the upper ledge is connected and the lower cover plate and the one end that the upper ledge is connected all are equipped with spacing colluding, work as the folding box expandes just the upper cover plate with the lower cover plate lid is fashionable, spacing on the upper cover plate collude the joint in the top frame of the wide curb plate in the right side, spacing on the apron down collude the joint in the top frame of the wide curb plate in the left side.

As a further improvement of the above technical solution, the left and right ends of the front long side plate and the left and right ends of the rear long side plate are designed as trapezoidal dovetail structures, and the front and rear ends of the left wide side plate and the front and rear ends of the right wide side plate are designed as trapezoidal dovetail structures adapted to the trapezoidal dovetail structures of the left and right ends of the front long side plate and the left and right ends of the rear long side plate; the middle of the left end and the right end of the bottom plate is provided with a pull groove. .

As a further improvement of the above technical scheme, the wide curb plate in a left side with vertical extension's accommodation space has been seted up in the front and back both ends of the wide curb plate in the right side, accommodation space is close to trapezoidal forked tail tenon structure setting, the reinforcement has been inserted in the accommodation space, the reinforcement is slice or tubulose, the material of reinforcement is for intensity to be higher than the wide curb plate in a left side with the plastics material or the metal material of the wide curb plate in the right side.

The utility model has the beneficial effects that: the folding box comprises an upper frame, an upper cover plate and a lower cover plate, wherein the right end of the upper cover plate is rotatably connected to a right end frame body of the upper frame, the left end of the lower cover plate is rotatably connected to a left end frame body of the upper frame, the left end of the upper cover plate can be lapped on the right end of the lower cover plate, lock holes are formed in the opposite sides of a front frame and a rear frame of the upper frame, a knob lock is arranged at the left end of the upper cover plate and comprises a knob and a lock shaft, the knob is rotatably arranged at the left end of the upper cover plate, an arc-shaped groove is formed in the knob, the lock shaft can be arranged in the left end of the upper cover plate in a front-back sliding mode, one end, close to the arc-shaped groove, of the lock shaft is arranged in the arc-shaped groove in a sliding mode, and when the knob is rotated anticlockwise, one end, close to the arc-shaped groove, of the lock shaft slides in the arc-shaped groove, And when the knob is rotated clockwise, one end of the lock shaft close to the arc-shaped groove slides in the arc-shaped groove, so that one end of the lock shaft far away from the arc-shaped groove is separated from the lock hole. Through setting up the knob lock for the user only need stir the knob alright with folding box locking or the unblock that will expand or fold, the unblock facilitates the use, can improve user experience.

Further effects of the above-mentioned non-conventional alternatives will be described below in connection with the embodiments.

Drawings

FIG. 1 is a schematic view of a fully unfolded folding case according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of a folding carton according to an embodiment of the present invention when not fully unfolded;

FIG. 3 is a schematic view of a fully folded folding box according to an embodiment of the present invention;

FIG. 4 is a top view of a folding box according to an embodiment of the present invention;

FIG. 5 is a cross-sectional view B-B of FIG. 4;

FIG. 6 is a schematic bottom view of the upper lid panel of the folding box according to the embodiment of the present invention;

FIG. 7 is a schematic top view of the upper deck of the folding box according to an embodiment of the present invention;

FIG. 8 is a schematic structural view showing the connection of the upper cover plate, the rear long side plate and the right wide side plate of the folding box according to the embodiment of the present invention;

FIG. 9 is a schematic view of a portion of a knob lock of a folding carton according to an embodiment of the present invention;

fig. 10 is a schematic structural view of the folding box according to the embodiment of the present invention after the metal tube is disassembled from the right wide side plate.

Wherein: go up frame 1, lockhole 11, upper cover plate 2, dodge groove 21, first tie up hole 212, lower apron 3, dodge position 31, thread 431, buckle limit 32, limit 23, knob lock 4, knob 41, arc 413, body 411, spanner 412, second tie up hole 412, left wide side board 5, right wide side board 6, hand shape fretwork groove 51, trapezoidal forked tail tenon structure 52, back long side board 9, preceding long side board 7, bottom plate 8, lock shaft 43, guide post 432, spring bolt 45, waist type hole 451, fixing base 42, spacing collude 22, tubular metal resonator 61, fluting 62.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing embodiments of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the embodiments of the present invention.

In the present invention, "up, down, left, right, front, and rear" are directions shown in the drawings.

Next, a folding box according to an embodiment of the present invention will be described in detail with reference to fig. 1 to 10.

As shown in fig. 1-10, according to the folding box provided by the present invention, the folding box comprises an upper frame 1, an upper cover plate 2 and a lower cover plate 3, the right end of the upper cover plate 2 is rotatably connected to the right end frame of the upper frame 1, the left end of the lower cover plate 3 is rotatably connected to the left end frame of the upper frame 1, the left end of the upper cover plate 2 can be lapped on the right end of the lower cover plate 3, the opposite sides of the front frame and the rear frame of the upper frame 1 are provided with locking holes 11, the left end of the upper cover plate 2 is provided with a knob lock 4, the knob lock 4 comprises a knob 41 and a lock shaft 43, the knob 41 is rotatably mounted on the left end of the upper cover plate 2, the knob 41 is provided with an arc-shaped groove 413, the lock shaft 43 is slidably mounted inside the left end of the upper cover plate 2 in a front-back manner, and one end of the lock shaft 43 close to the arc-shaped groove 413 is slidably mounted in the arc-shaped groove 413, when the knob 41 is rotated counterclockwise, one end of the lock shaft 43 close to the arc-shaped groove 413 slides in the arc-shaped groove 413, so that one end of the lock shaft 43 far from the arc-shaped groove 413 is matched with the lock hole 11 to lock the folding box, and when the knob 41 is rotated clockwise, one end of the lock shaft 43 close to the arc-shaped groove 413 slides in the arc-shaped groove 413, so that one end of the lock shaft 43 far from the arc-shaped groove 413 is separated from the lock hole 11 to unlock the folding box.

Therefore, according to the folding box provided by the embodiment of the utility model, the knob lock is arranged, so that a user can lock or unlock the unfolded or folded folding box only by rotating the knob, the unlocking is convenient to use, the user experience can be improved, and the folding box is simple in structure through ingenious matching among all parts.

Further, the folding box further comprises a bottom plate 8, a front long side plate 7, a rear long side plate 9, a left wide side plate 5 and a right wide side plate 6, wherein the front long side plate 7 and the rear long side plate 9 both comprise an upper plate and a lower plate, in the drawing, the upper plate of the front long side plate 7 is marked with 71, the lower plate of the front long side plate 7 is marked with 72, the upper plate of the rear long side plate 9 is marked with 91, the lower plate of the rear long side plate 9 is marked with 92, the upper plate and the lower plate are rotatably connected, the free ends of the lower plates of the front long side plate 7 and the rear long side plate 9 are respectively and correspondingly and rotatably connected to the front end frame and the rear end frame of the upper frame 1, and the lower ends of the left wide side plate 5 and the right wide side plate 6 are respectively and correspondingly and rotatably connected to the left end and the right end of the bottom plate 8.

In some embodiments, the maximum angle of rotation between the left wide side panel 5 and the left end of the bottom panel 8, and between the right wide side panel 6 and the bottom panel 8, is in degrees. When the case expandes completely, left side wide curb plate 5 just can't continue outside upset with perpendicular to bottom plate 8, right side wide curb plate 6 just can't continue outside upset with perpendicular to bottom plate 8, the right-hand member inboard of upper cover plate 2 and the left end inboard of lower cover plate 3 are equipped with the dog, it is fashionable when upper cover plate 2 and lower cover plate 3 lid, dog on the upper cover plate 2 can restrict the upset of right side wide curb plate 6 to the case inboard, dog on the lower cover plate 3 can restrict the upset of left side wide curb plate 5 to the case inboard, simultaneously, upper cover plate 2 and lower cover plate 3 are through turning knob lock 4 and preceding long curb plate 7 and the long curb plate 9 locking of back. When the folding box in the unfolding state is folded, a user pushes the left wide side plate 5 and the right wide side plate 6 towards the inside of the box by using handles, so that the left wide side plate 5 and the right wide side plate 6 are attached to the bottom plate 8, the upper plate and the lower plate of the front long side plate 7 and the rear long side plate 9 are folded and then attached to the left wide side plate 5 and the right wide side plate 6, the upper cover plate 2 and the lower cover plate 3 are attached to the front long side plate 7 and the rear long side plate 9, and the upper cover plate 2 is buckled on the lower cover plate 3. The right-hand member of upper cover plate 2 and the right-hand member framework of last frame 1 are all connected through connecting the axle tooth between the left end of lower cover plate 3 and the left end framework of last frame 1, make from this that upper cover plate 2 and lower cover plate 3 can overturn on last frame 1. The free ends of the lower plates of the front long side plate 7 and the rear long side plate 9 and the front end and the rear end of the corresponding bottom plate 8, the free ends of the upper plates of the front long side plate 7 and the rear long side plate 9 and the front end frame and the rear end frame of the corresponding upper frame 1, and the lower ends of the left wide side plate 5 and the right wide side plate 6 and the left end and the right end of the corresponding bottom plate 8 are connected by connecting shafts. The connecting shafts between the lower ends of the left wide side plate 5 and the right wide side plate 6 and the left end and the right end of the corresponding bottom plate 8 can adopt limit shafts, so that the maximum rotating angles between the left wide side plate 5 and the left end of the bottom plate 8 and between the right wide side plate 6 and the bottom plate 8 are 90 degrees.

Further, a frame convex edge is arranged on the frame body of the upper frame 1, and cover plate concave groove edges are arranged at the front edge and the rear edge of the upper cover plate 2 and the lower cover plate 3. Thereby providing a better closure of the box.

Furthermore, a second hidden button male head or a second hidden button female head is arranged on the upper plate, and a second hidden button female head or a second hidden button male head is correspondingly arranged on the lower plate. Therefore, when the box is folded, the upper plate and the lower plate are fixed, and the box is convenient to take and place.

Further, the upper cover plate 2 with the one end that the upper frame 1 is connected with the lower cover plate 3 with the one end that the upper frame 1 is connected all is equipped with spacing colluding 22, works as the folding box expandes just the upper cover plate 2 with it is fashionable that the lower cover plate 3 covers, spacing colluding 22 joint on the upper cover plate 2 in the top frame of wide curb plate 6 in the right side, spacing colluding 22 joint on the lower cover plate 3 in the top frame of wide curb plate 5 in the left side. Therefore, when the folding box is unfolded, the left wide side plate 5 and the right wide side plate 6 cannot be pushed away from the outside in the direction of the inside of the box, and the stability of the box when the box is unfolded is ensured.

Further, both ends about preceding long curb plate 7 with both ends design for trapezoidal dovetail structure 52 about back long curb plate 9, both ends around the wide curb plate 5 of a left side with both ends design for the trapezoidal dovetail structure 52 of the trapezoidal dovetail structure 52 adaptation with both ends about preceding long curb plate 7 with both ends about back long curb plate 9 around the wide curb plate 6 of the right side. Therefore, when the box is completely unfolded, the trapezoid dovetail structure 52 on the wide side plate is matched with the trapezoid dovetail structure 52 on the long side plate, so that the folding box has better stability and bearing property when being unfolded; the middle of the left end and the right end of the bottom plate 8 is provided with a pull groove, so that a user can move the folding box through the pull groove when the folding box is folded.

Further, the accommodation space 62 that has vertically extended is seted up in the front and back both ends of left wide curb plate 5 with right wide curb plate 6, accommodation space 62 is close to trapezoidal dovetail structure 52 and sets up, it is equipped with reinforcement 61 to insert in accommodation space 62, reinforcement 61 is slice or tubulose, reinforcement 61's material is for intensity to be higher than left wide curb plate with the plastics material or the metal material of right wide curb plate. The reinforcing piece is preferably a square tube and is used as a reinforcing rib to prevent the wide side plate from bending inwards when the folding box is unfolded, so that the folding box has stronger stability after being unfolded; the left wide side plate 5 and the right wide side plate 6 are provided with hand-shaped hollow grooves 51, so that the folding box is convenient to carry.

Further, be equipped with on the intermediate position of upper cover plate front and back direction and dodge groove 21, knob 41 includes body 411 and the spanner 412 that is fixed in the body periphery, body 411 is the circular plate body, spanner 412 is the arc plate body, the rotatable being fixed in center of body 411 on the upper cover plate 2, spanner 412 is located in dodging groove 21 and can in dodge to rotate in the groove 21, arc groove 413 with lock axle 43 all is equipped with two, two arc grooves 413 and two lock axles 43 with the central symmetry of body 411 sets up, and every lock axle 43 is close to the one end of arc groove 413 is fixed with guide post 432, guide post slidable mounting in arc groove 413, when anticlockwise rotation knob 41, guide post 432 is in slide in arc groove 413, make lock axle 43 keep away from the one end of arc groove 413 cooperate to lockhole 11, when the knob 41 is rotated clockwise, the guide post 432 slides in the arc-shaped groove 413, so that the end of the lock shaft 43 away from the arc-shaped groove 413 is separated from the lock hole 11. Thereby achieving convenient locking and unlocking of the folding box. This results in a better locking effect of the twist lock 4. The folding box can be locked and unlocked more stably and reliably.

Further, the locking shaft 43 is further provided with a fastening tooth 431, the fastening tooth 431 is parallel to the bottom surface of the upper cover plate 2, the lower cover plate 3 is provided with a fastening edge 32 matched with the fastening tooth 431, the left end of the upper cover plate 2 is provided with an edge groove 23 for accommodating the fastening edge 32, and when the folding box is locked, the fastening tooth 431 is fastened on the fastening edge 32. Therefore, the upper cover plate 2 can be better fixed on the lower cover plate 3, and the locking effect of the folding box is better.

Further, knob lock 4 still includes fixing base 42, fixing base 42 is fixed in the bottom of upper cover plate 2 just is located dodge the below of groove 21, body 411 is located fixing base 42 with between the bottom of upper cover plate 2, the center rotatable install of body 411 in on the fixing base 42. Therefore, the wrench can be rotated without being interfered by other parts, and the folding box is more stable to lock and unlock.

Further, when the arc-shaped groove 413 extends on the body from a first end to a second end, the distance from the arc-shaped groove 413 to the center of the body 411 gradually decreases, the first end is the position of the guiding column 432 in the arc-shaped groove 413 when the lock shaft 43 is fitted in the lock hole 11, and the second end is the position of the guiding column 432 in the arc-shaped groove 413 when the lock shaft 43 is disengaged from the lock hole 11.

Further, the left end of upper cover plate 2 is equipped with first strap hole 212, be equipped with second strap hole 412 on the body 411, be equipped with on the lower cover plate 3 and dodge position 31, when rotating knob 41 makes first strap hole 212 align in when second strap hole 412, lock axle 43 cooperate in lockhole 11, and this moment first strap hole 212 is located dodge the top of the right part of position 31. Therefore, when the folding box is locked, the knob 41 can be bound on the upper cover plate 2 through the binding band passing through the first binding band hole 212 and the second binding band hole 412, the folding box is prevented from being unlocked due to the fact that the knob 41 rotates by itself, and a certain operation space can be formed when the binding band passes through the arrangement of the avoiding position 31.

Therefore, the folding box provided by the embodiment of the utility model has the advantages that the folding box is simple in structure through the ingenious matching among all the parts, the folding box can be locked and unlocked quickly, the folding box is convenient to fold and unfold, and the user experience can be improved.

In the description of the present invention, the terms "first", "second", "another", and "yet" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

While embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. The folding box is characterized by comprising an upper frame, an upper cover plate and a lower cover plate, wherein the right end of the upper cover plate is rotatably connected to a right end frame body of the upper frame, the left end of the lower cover plate is rotatably connected to a left end frame body of the upper frame, the left end of the upper cover plate can be connected to the right end of the lower cover plate in a lap joint mode, lock holes are formed in the opposite sides of the front frame and the rear frame of the upper frame, a knob lock is arranged at the left end of the upper cover plate and comprises a knob and a lock shaft, the knob is rotatably arranged at the left end of the upper cover plate, an arc-shaped groove is formed in the knob, the lock shaft can be arranged inside the left end of the upper cover plate in a front-back sliding mode, one end, close to the arc-shaped groove, of the lock shaft is slidably arranged in the arc-shaped groove, and when the knob is rotated anticlockwise, one end, close to the arc-shaped groove, is positioned in the arc-shaped groove in a sliding mode, And when the knob is rotated clockwise, one end of the lock shaft close to the arc-shaped groove slides in the arc-shaped groove, so that one end of the lock shaft far away from the arc-shaped groove is separated from the lock hole.

2. The folding box according to claim 1, wherein the upper cover plate is provided with an avoiding groove at an intermediate position in the front-rear direction, the knob comprises a body and a wrench fixed on the periphery of the body, the body is a circular plate, the wrench is an arc-shaped plate, the center of the body is rotatably fixed on the upper cover plate, the wrench is positioned in the avoiding groove and can rotate in the avoiding groove, the arc-shaped groove and the lock shaft are both provided with two arc-shaped grooves and two lock shafts symmetrically arranged with respect to the center of the body, and a guide post is fixed at one end of each lock shaft close to the arc-shaped groove, the guide posts are slidably mounted in the arc-shaped grooves, when the knob is rotated counterclockwise, the guide posts slide in the arc-shaped grooves, so that one end of the lock shaft far away from the arc-shaped groove is matched with the lock hole, when the knob is rotated clockwise, the guide post slides in the arc-shaped groove, so that one end of the lock shaft, which is far away from the arc-shaped groove, is separated from the lock hole.

3. The folding box of claim 2, wherein the locking shaft further comprises a fastening tooth parallel to the bottom surface of the upper cover plate, the lower cover plate is provided with a fastening edge engaged with the fastening tooth, the left end of the upper cover plate is provided with a side groove for accommodating the fastening edge, and the fastening tooth is fastened to the fastening edge after the folding box is locked.

4. The folding box of claim 2, wherein the knob lock further comprises a fixing seat fixed to the bottom of the upper cover plate and located below the avoiding groove, the body is located between the fixing seat and the bottom of the upper cover plate, and the center of the body is rotatably mounted on the fixing seat.

5. The folding box of claim 2, wherein the arc-shaped slot gradually decreases in distance from the center of the body as the arc-shaped slot extends from a first end to a second end on the body, the first end being a position of the guide post in the arc-shaped slot when the lock shaft is fitted in the lock hole, the second end being a position of the guide post in the arc-shaped slot when the lock shaft is disengaged from the lock hole.

6. The folding box of claim 4, wherein a first strap hole is formed at the left end of the upper cover plate, a second strap hole is formed in the body, an avoiding position is formed in the lower cover plate, when the knob is rotated to align the first strap hole with the second strap hole, the lock shaft is matched with the lock hole, and the first strap hole is located above the right part of the avoiding position.

7. The folding box of claim 1, further comprising a bottom plate, a front long side plate, a rear long side plate, a left wide side plate and a right wide side plate, wherein the front long side plate and the rear long side plate each comprise an upper plate and a lower plate, the upper plate and the lower plate are rotatably connected, free ends of the lower plates of the front long side plate and the rear long side plate are respectively and correspondingly rotatably connected to a front end and a rear end of the bottom plate, free ends of the upper plates of the front long side plate and the rear long side plate are respectively and correspondingly rotatably connected to a front end frame body and a rear end frame body of the upper frame, and lower ends of the left wide side plate and the right wide side plate are respectively and correspondingly rotatably connected to a left end and a right end of the bottom plate.

8. The folding box of claim 7, wherein the end of the upper cover plate connected with the upper frame and the end of the lower cover plate connected with the upper frame are both provided with a limiting hook, when the folding box is unfolded and the upper cover plate and the lower cover plate are closed, the limiting hook on the upper cover plate is clamped on the top end frame of the right wide side plate, and the limiting hook on the lower cover plate is clamped on the top end frame of the left wide side plate.

9. The folding box according to claim 7, wherein the left and right ends of the front long side plate and the left and right ends of the rear long side plate are designed as trapezoidal dovetail structures, and the front and rear ends of the left wide side plate and the front and rear ends of the right wide side plate are designed as trapezoidal dovetail structures adapted to the trapezoidal dovetail structures of the left and right ends of the front long side plate and the left and right ends of the rear long side plate; the middle of the left end and the right end of the bottom plate is provided with a pull groove.

10. The folding box according to claim 7, wherein vertically extending accommodating spaces are formed in the front end and the rear end of the left wide side plate and the right wide side plate, the accommodating spaces are arranged close to the trapezoidal dovetail structure, a reinforcing part is inserted into the accommodating spaces, the reinforcing part is in a sheet shape or a tubular shape, and the reinforcing part is made of a plastic material or a metal material with higher strength than the left wide side plate and the right wide side plate.

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