Articulation device for seats anti, in particular for motor vehicle anti seats.

摘要

The invention relates to a hinge device for seats of vehicles, comprising two parts connected by a hinge axis, as well as a rotary drive is provided with a first pinion (5) with internal teeth and a second pinion (6) with external teeth, these teeth having a spherical involute profile, at least the teeth of the first pinion (5) having a rounded head. & br / the position of the sides of the tooth of the first pinion (5), where the part of the sidewall having a spherical involute profile merges with the part of the side formed by the rounded head, is located on a circle whose diameter (of 1) is at least approximately equal to the diameter (db 1) of the circle of the base of the first pinion gear 5, and the diameter (da 1) of the circle of the head of the first pinion (5) is smaller than the diameter (db 1) of the base circle. & br / application to the seats of motor vehicles.