Abstract: A fish-hook clasp with a rotating mechanism or “small jack” whose shape forms two activating wings which protrude respectively from the side edges of the clasp's shell. It is possible to act on at least one of the wings to cause the rotating mechanism to rotate therefore bringing the rotating mechanism from the closed position, towards which the rotating mechanism is normally pushed by the internal spring, to the open position. The rotating mechanism is also supplied with contact surfaces, which are there to interact with the closed part of the edge of the shell of the clasp which defines the position of an arm of the rotating mechanism when the clasp is in the closed position.

Abstract: The invention consists of a fish-hook clasp with a rotating mechanism or “small jack” (2) whose shape forms two activating wings (11) and (12) which protrude respectively from the side edges (20) and (21) of the clasp's shell (1), it is possible to act on at least one of said wings to cause the rotating mechanism to rotate therefore bringing it from the closed position, towards which it is normally pushed by the internal spring (3), to the open position. The rotating mechanism (2) is also supplied with contact surfaces (25) and (26), which are there to interact with the closed part of edge (21) of shell (1) of the clasp which defines the position of its own arm (4) when the clasp is in the closed position.