Self-closing and opening device particularly for a movable furniture part

A self-closing device combinable with an opening system thereof, particularly for a movable furniture part comprising a fixed guide having a supporting body in which a first slider can slide reversibly along a sliding axis in opposition to and through the action of first elastic means, said first slider being engageable with first driving means comprising a first driving pin present on a driving element which slides reversibly in the direction of said sliding axis, said supporting body comprising first means for movement of said first slider engageable with guide means of said first slider, so as to release it from said driving means, also provided being a mechanical or elastically yielding stop against which said first slider rests directly or indirectly before it engages with said guide means in said first movement means, said supporting body having a groove which in the area of the rear end thereof comprises said first means for movement of said first slider and in the area of the front end thereof comprises second means for movement of said first slider transverse to said sliding axis suitable to engage with said guide means of said first slider, said first slider comprising a rear slot and a front slot in which said driving pin engages selectively, said front slot and said rear slot having a respective side wall projecting with respect to the surface separating said front slot and said rear slot to intercept said driving pin.