Instrument for writing and drawing

A writing and drawing instrument comprising a main body of elongate shape having an elongate axis and a first and a second writing end, first and second auxiliary bodies each having an elongate shape and being provided at its respective ends with a writing element, each of said auxiliary bodies being mounted to rotate about an axis transverse to said elongate axis in order to allow the alternative positioning of one of the two writing elements at one of the writing ends of the main body, each of the auxiliary bodies being able to slide longitudinally with respect to the main body between a first position in which the writing element positioned at the writing end is covered by the main body and a second position in which the writing element projects externally from the main body thereby allowing writing, the main body having two slots in which the respective auxiliary body is slidably and rotatably mounted, each auxiliary body being provided with grooved lateral surfaces cooperating with stop means designed to prevent the undesired rotation of the auxiliary body with respect to the main body, and each auxiliary body having hinge means cooperating with the main body and ramp means able to cooperate with the stop means for causing resilient lateral deformation of the main body thereby disengaging the hinge means to allow and guide the axial translation of the auxiliary body following the disengagement of the hinge means.