A hinge mechanism including a sleeve member having an inwardly facing bearing surface and a rod member dimensioned to fit in the sleeve member in engagement with the bearing surface. The sleeve member is resiliently flexible but substantially inextensible and has at least one recess formed in its bearing surface, the rod member being provided with a projection shaped to be engageable in the recess. The rod member is an interference fit in the sleeve member with the projection located in the recess and the rod member is rotatable in the sleeve member by causing only resilient deformation of the latter.
