Display tray with modular structure

A tray of the modular demonstration device including the mounting base comprising:

• a flat right-angular bottom, defined by the front and the rear walls located perpendicular to its upper surface, and legs located on the lower surface of the bottom near the rear wall of the mounting base, removable vertical side walls, provided that the legs are made in the form of hollow parallelepipeds, the lower part of the legs is cut off at an acute angle defining the inclination of the mounting base to the long axes of the parallelepipeds, the upper part of the rear wall of the base is fitted with two triangular projections, the distance between which coincides with the distance between the inner surfaces of the cavities of the leg, the rear sides of the triangular projections are parallel to the axes of the legs, the left and the right edges of the tray mounting base are equipped with fixation elements for side walls installing on the mounting base and for horizontally fastening together at least two adjacent tray mounting bases to form a horizontal modular structure, and the legs of the tray and the upper part of the rear wall of the mounting base with triangular projections are fitted with elements of mutual fixation to each other to form a vertical modular structure.