Angular adjustment device for a vehicle seat

A hinge for angular adjustment of a first vehicle seat element relative to a second vehicle seat element around a hinge axis, the hinge comprising:

• a first and a second hinge plate integrally connected respectively to the first and to the second vehicle seat element, the first hinge plate comprising a base toothed portion with N regularly spaced teeth,
• a plurality of sets of rolling elements, each comprising at least one rolling element, distributed around the hinge axis, each rolling element of each set being radially movable between at least one locking position, in which the rolling element is at least partially engaged in the space between two successive teeth, bearing against the opposite faces of the two successive teeth, and an unlocking position in which the rolling element is disengaged from the space between two successive teeth of the base toothed portion,
• a plurality of control cams, movable relative to the first hinge plate, and each cooperating with the rolling elements of a different set, such that the movement of each control cam relative to the first hinge plate causes the rolling elements to transition from their unlocking position to their at least one locking position and vice versa, each of the control cams being biased to return by a respective spring,
• and a control hub able to move the control cams relative to the first hinge plate.