Abstract: The invention relates to a golf training device comprising an annular support with a hole for a golf ball is formed. The support being provided with a plurality of members angularly distributed with each member having an external ramp and an internal ramp. The ramps are arranged to have a stable state with the external ramp arranged in a plane of access to the hole. The internal ramp is arranged protruding around the hole, and a state constrained by the passage of the ball on the member wherein the internal ramp is lowered inside of the hole. The annular support has a plurality of feet which are angularly distributed between the members, each one of the feet having a lower ground support wall and an upper wall forming an access ramp to the hole.

Abstract: A hinge for a folding bicycle comprising a first tubular portion, a second tubular portion, the first and second tubular portions being able to assume an unfolded position and a folded position; a blocking element which can assume at least one closed position in which it retains the first tubular portion and the second tubular portion in the unfolded position, and an open position in which it allows the movement into the folded position of the first and second tubular portions; a connection part and a return device configured to bring the blocking element from its open position to its closed position.