Mattress support assembly

A mattress support assembly, comprising:

• a rectangular frame having side rails and footboard and headboard rails;
• a connector assembly in each corner of the frame internally connecting each side rail to the footboard rail and to the headboard rail, said connector assembly in turn comprising:
• two plates from which alternately insertable eyelets project, each plate being fixed to a footboard rail/headboard rail or to a side rail by means of screws;
• and
• a conical pin that penetrates the inside of the alternately inserted eyelets, wherein the lower end of the conical pin has an external thread which receives a locking nut,
• wherein each of the plates has an inclined face having an angle of inclination of 45° in relation to a flat surface of the plate;
• a leg disposed under each corner of the frame, each leg having three bars in a Cartesian arrangement, with an angle of 90° in the horizontal plane being defined between a first bar and a second bar, while a third bar projects in the orthogonal direction to the horizontal plane, each of the first bar and the second bar having a threaded pin, and each threaded pin projecting orthogonally in relation to the horizontal plane and in the opposite direction in relation to the third bar;
• and
• a reinforcement plate fixed to the first bar and the third bar, with a second reinforcement plate being fixed to the second bar and the third bar, each reinforcement plate having the shape of a right triangle, with the edge opposite the right angle having an arched shape, and wherein each of the first, second and third bars has a square cross-section.