Cushioned coupling hinge and a toilet seat comprising such a cushioned coupling hinge

Cushioned coupling hinge, suitable to couple in a rotatable manner to a mobile component, namely a seat-ring or lid of a toilet seat, and a fixed component, i.e. a toilet, comprising:

• a cushioning mechanism suitable to cushion the falling movement of the mobile component during rotation about an axis of rotation (X);
• a mobile portion, suitable to be integrally constrained in rotation to the mobile component;
• a fixed portion, suitable to be integrally constrained to the fixed component;
• characterized in that both the maintenance in position of the hinge along the axis of rotation (X) and the activation of the cushioning mechanism is obtained by means of an engagement element inserted at right angles to the axis of rotation (X) simultaneously through the mobile component to be cushioned and the mobile portion, wherein the engagement element is a shaped pin insertable in a shaped engagement hole made in the mobile portion, wherein the shaped pin comprises a shaped portion designed to form, in cooperation with the shaped engagement hole, a stop to prevent the accidental dislodging of said pin from the hole, and wherein the shaped portion comprises an insertion notch and a locking notch, made on incident planes and in succession along the outer circumference of the shaped pin.