Foldable cardboard stand assembly system and compact box

A foldable cardboard stand assembly system, comprising:

• shelves with a back-to-back arrangement;
• outer vertical support elements;
• a support structure of the shelves;
• a horizontal surface;
• an outer edge;
• locking mechanisms;
• a base;
• a header element;
• the back-to-back shelves form shelf modules, forming a shelf assembly when stacked vertically on top of each other;
• the shelf assembly comprising a separate upper portion and a lower portion;
• the horizontal surface of the shelf comprises a first horizontal surface, with a prong on an inner edge and one or more grooves at ends of the inner edges, and a second horizontal surface with a foldable flap configured to connect the first and the second horizontal surfaces with each other and having
• one or more folding lines at a junction of the first horizontal surface and the prong;
• the first horizontal surface and the second horizontal surface configured to be folded horizontally to a narrower width using the one or more folding lines;
• a hole in the first horizontal surface;
• the shelves having a support structure comprising vertical portions at each end of the shelf the support structures being mirror images of each other, and a horizontal portion connecting the support structures, and;
• the vertical portions comprising three faces bent to an angle, the three faces being a wider outer portion, a narrower inner portion, and a middle connecting portion;
• and the vertical portions comprising folding lines at a junction of the wider outer portion, a middle connecting portion and the narrower inner portion;
• the wider outer portion, the narrower inner portion and the middle connecting portion being horizontally foldable to a narrower width using the folding lines;
• the narrower inner portion having a horizontal prong extending into the interior of the shelf assembly, the horizontal prong configured to support the horizontal surfaces;
• a notch at a junction of the horizontal prong and an upper edge of the narrower inner portion, configured to lock the first horizontal surface of the shelf to the narrower inner portion of the vertical portion of the support structure;
• an incision of the first horizontal surface being equal to the width of the narrower inner portion of the shelf support structure's vertical part;
• an upper edge of the shelf being attached to the upper edge of the support structure's horizontal portion;
• the ends of the shelf being at an angle and align with the inner portions of a wider outer part and the middle connecting portion of the vertical part of the support structure;
• outer vertical support elements at vertical ends of the shelf assembly being mirror images of each other, wherein:
• the outer vertical support elements comprising two wider outer sections and a narrower middle section between the wider outer sections and the wider outer sections being positioned at an angle to the narrower middle section and the outer vertical support element having folding lines at a junction of the wider outer portions and the narrower middle portion;
• the wider outer portions and the narrower middle portion being configured to be folded to achieve a narrower shape using the folding lines;
• one of the wider portions of the outer support element and the narrower middle portion having at least one incision, and the other wider support element having at least one folding line, and
• the incision on the wider portion of the support element being a shaped line, and a straight line on the narrower middle portion, and the folding line being a straight line;
• the incision partially dividing the outer vertical support element into an upper portion and a lower portion of the outer vertical support element;
• the outer vertical support element being configured to be foldable vertically downwards at the location of the incision and the folding line;
• two opposite vertical prongs located on both sides of the wider portion of the outer vertical support element with the incision;
• a slot for insertion of the vertical prong on the lower portion of the outer vertical support element being located behind the vertical prong on the upper portion of the external vertical support element, locking the parts of the outer vertical support element together;
• the vertical portion of the shelf support structure connected to the outer vertical support element, and the upper shelf assembly portion and the lower shelf assembly portion are independently connected to the outer support element;
• the horizontal part of the shelf module's support structure forming the base;
• the base contains an outer support element with extended edges;
• the header element being configured to be attached to the foldable flap and having a support leg, with a foldable extension of the support leg including a fastener inserted into the opening and the header element configured to provide additional interconnection between the first horizontal surface and the second horizontal surface of the shelf module, and to further secure the stand assembly system into a three-dimensional set-up state.