Abstract: A strand adjusting mechanism (5) in a folding clasp (1, 2) for bacelets, this mechanism comprising a buckle (40) mounted pivotally round a transverse rotational shaft (20) at the end of one of the blades (1) of the clasp and a tongue (30) mounted pivotally round the same shaft (20) as the buckle. The tongue and/or the end of the blade have one or more stops (16, 34) limiting the rotation of this tongue between a raised position orthogonal to the end of the blade and a lowered position in the extension of the blade. In addition, the upper cross bar of the buckle has a subjacent front wall (46) capable of abutting against the free end of the tongue.

Abstract: A folding clasp for a bracelet, including a shank comprising two parallel side members each of which have a first end and a second end, wherein the first end of one parallel side member is connected to a first end of another parallel side member and wherein the second end of one parallel side member is connected to the second end of the other parallel side member, and at least one transverse element interconnecting each of the parallel side members; a first arm having one end articulated at the first end of each of the parallel side members; and another arm articulated at the second end of each of the parallel side members, so that the first arm and the other arm are adapted fold down and lock in the shank on a transverse element, wherein each of the first arm and the other arm includes a head, having on a front face a concavity for compressing on the transverse element and on a bottom face a recess located behind the concavity, for receiving a bracelet end and for locking the arm inside the shank.