Pivoting link device linking at least two parts (52, 54) and comprising: - a yoke joint, secured to the first part, having first and second branches (58, 60) each comprising an internal face (FI5, FI60) oriented towards the other branch (60, 58) and an external face (FE58, FE60) opposite the internal face (FI58, F60), a bore (66, 68) which emerges at the internal and external faces (FI58, FI60, FE58, FE60), - an arm, secured to the second part, positioned between the first and second branches (58, 60) of the yoke joint and comprising a bore, - a cylindrical axis configured to be housed in the bores (66, 68, 70) of the first and second branches (58, 60) and of the arm, forming a pivoting axis, - at least one guiding ring, inserted between the first branch and the cylindrical axis, comprising a tubular body which has a flange configured to bear against the internal face of the first branch in order to block the guiding ring relative to the first branch along a line parallel to the pivoting axis, in a first direction, characterized in that the guiding ring comprises an extension protruding relative to the external face of the first branch, the extension having at least one slit allowing the extension to be expanded radially elastically, and in that the pivoting link device comprises: - an immobilization system comprising at least one groove, which extends in a plane transversal to a peripheral face of the cylindrical axis, and at least one rib having forms complementing those of the groove on an internal face of the extension of the guiding ring in contact with the peripheral face of the cylindrical axis when the extension is not expanded radially, said immobilization system being configured to occupy a free state in which the cylindrical axis and the guiding ring slide relative to one another, along a line parallel to the pivoting axis, and a blocked state in which the cylindrical axis and the guiding ring are immobilized relative to one another along the longitudinal line, in both directions, when the rib and the groove are positioned in line with one another, and - a blocking system configured to occupy a separated state in which it allows the guiding ring to slide in the bore of the first branch and a blocked state in which it is in contact with the external face of the first branch in order to block the guiding ring relative to the first branch along the longitudinal line, in a second direction opposite the first direction. - a yoke joint, secured to the first part, having first and second branches (58, 60) each comprising an internal face (FI5, FI60) oriented towards the other branch (60, 58) and an external face (FE58, FE60) opposite the internal face (FI58, F60), a bore (66, 68) which emerges at the internal and external faces (FI58, FI60, FE58, FE60), - an arm, secured to the second part, positioned between the first and second branches (58, 60) of the yoke joint and comprising a bore, - a cylindrical axis configured to be housed in the bores (66, 68, 70) of the first and second branches (58, 60) and of the arm, forming a pivoting axis, - at least one guiding ring, inserted between the first branch and the cylindrical axis, comprising a tubular body which has a flange configured to bear against the internal face of the first branch in order to block the guiding ring relative to the first branch along a line parallel to the pivoting axis, in a first direction, - an immobilization system comprising at least one groove, which extends in a plane transversal to a peripheral face of the cylindrical axis, and at least one rib having forms complementing those of the groove on an internal face of the extension of the guiding ring in contact with the peripheral face of the cylindrical axis when the extension is not expanded radially, said immobilization system being configured to occupy a free state in which the cylindrical axis and the guiding ring slide relative to one another, along a line parallel to the pivoting axis, and a blocked state in which the cylindrical axis and the guiding ring are immobilized relative to one another along the longitudinal line, in both directions, when the rib and the groove are positioned in line with one another, and - a blocking system configured to occupy a separated state in which it allows the guiding ring to slide in the bore of the first branch and a blocked state in which it is in contact with the external face of the first branch in order to block the guiding ring relative to the first branch along the longitudinal line, in a second direction opposite the first direction.