Magnetic clasp

A bracelet or wristband with a magnetic clasp comprising a first and a second flexible end part in the form of a strap portion, said end parts being separable and being arranged to overlap in the closed position of the bracelet so that the bracelet substantially forms a ring with an external side and an internal side and so that the end parts define an overlapping area, the end parts each having a contact surface arranged to adjoin the contact surface of the other end part in the overlapping area so that the first end part is on the external side of the ring and the second end part is on the internal side, the bracelet comprising a first magnetic circuit portion integrated in the first end part and a second magnetic circuit portion integrated in the second end part, said first and second magnetic circuit portions being arranged to mutually attract each other and to cooperate so as to unite the contact surfaces of the two end parts in the closed position of the bracelet;

• wherein the first and second magnetic circuit portions each include a soft ferromagnetic alloy yoke, said yoke having an elongated shape and being arranged transversely to the bracelet and parallel to the contact surface of the end part in which the magnetic circuit portion is integrated, in that said first magnetic circuit portion includes a row of bipolar magnets arranged between the ferromagnetic yoke and the contact surface of the first end part, the magnets of said row having directions of polarisation that are parallel to each other and normal to the contact surface of the first end part, and in that a plurality of second magnetic circuit portions are integrated in the second end part, said second portions are arranged parallel to each other and spaced apart from each other so as to enable the bracelet length to be selected.