Embeddable mechanism with a three movement opening system. It is realized with highly-resistant coldrolled steel tubes of top quality and is lacquered with epoxy resins in high temperature oven. The several bed bases available are made up of slats, wire mesh, polypropylene, polypropylene and slats. On request the sheet metal side having suitable holes for the fixing in the chest can be equipped with stiffening distance tubes and support feet.