Low encumbrance covering device for a mirror of a sun visor for vehicles

A low encumbrance covering device (10, 110) for a mirror (12) of a sun visor (14) for vehicles, where a support structure (130) for said mirror (12) is foreseen, and where, when the mirror (12) is shut, covering elements (20, 134) are arranged in front of the mirror (12); such covering elements (20, 134), when the mirror (12) is uncovered, occupy exclusively zones at least partly in front of said mirror (12) and/or in front of said support structure (130) of the mirror (12) itself.