Device for closing and opening by manual pressure a drain of a sanitary fixture

A device for closing and opening by manual pressure a drain of a sanitary fixture, comprising:

• a hollow tubular housing body configured to be integrally associated with a closing plug;
• and
• a shank at least partially housed inside the housing body, the shank being configured to be integrally connected to a drain outlet configured to be occluded by the closing plug,
• wherein the housing body comprises a tubular wall delimited at a first end by a lower opening and at a second end, opposite to the first end, by an upper opening,
• wherein the shank engages the lower opening, and the upper opening is at least partially engageable by the closing plug,
• wherein the tubular wall of the housing body comprises a plurality of ribs that develop parallel to a drive axis, and the shank comprises a crown protruding radially outward from an outer surface thereof, the crown defining two or more slots designed in a complementary manner and arranged in positions corresponding to the plurality of ribs, such that each rib engages a slot to allow a relative translation of the housing body with respect to the shank along the drive axis, and
• wherein the housing body is translatable with respect to the shank between a first closed position, in which a larger portion of the shank is stably inserted into the housing body, and a second open position, in which a smaller portion of the shank is stably inserted into the housing body, passing through a position of maximum momentary insertion of the shank into the housing body;
• a drive spring configured to urge the housing body toward the second open position;
• and
• an annular rotor rotatable about the drive axis and designed to define:
• a first shaped lower surface configured to cooperate with the plurality of ribs to bring and maintain the housing body in the first closed position,
• a plurality of sliding seats each designed to allow a sliding of a rib therein so as to allow a relative translation of the housing body with respect to the shank;
• and
• a second shaped lower surface configured to cooperate with a striking surface when the housing body and the shank are in the position of maximum momentary insertion, the striking surface being defined on a surface of the shank facing toward the annular rotor so as to cause a rotation of the annular rotor with respect to the housing body.