Unidirectional clutch wheel assembly, in particular for horology

A unidirectional clutch wheel assembly comprising a first wheel, a second wheel coaxial with the first wheel and comprising an inner toothing, a rigid drive member rotationally fixed with respect to the first wheel and at least one rigid pawl connected to the rigid drive member by an elastic strip, the rigid pawl being locked against the inner toothing by the rigid drive member to rotationally fix the first and second wheels to each other when the first wheel or the second wheel is rotationally driven in a direction corresponding to coupling, wherein the inner toothing has asymmetrical teeth and wherein the rigid pawl is arranged, in position locked against the inner toothing, to be in point contact, in top plan view, with two consecutive teeth of the inner toothing and with the rigid drive member,

• wherein the rigid pawl is arranged such that the point contact between the rigid pawl and the rigid drive member is effected between a rounded protuberance of an inner face of the rigid pawl and a beak of the rigid drive member, and
• wherein the rigid drive member comprises a notch serving as a clearance for the rounded protuberance during disengaging of the rigid pawl when the first wheel or the second wheel is rotationally driven in a direction corresponding to uncoupling.