Articulation members for back portion of vehicle seats

摘要: The articulation member comprises asymetrically guided bearing plates. A fixed flange is shaped in order to support, by means of sectors, sliding plates having an upper toothing pitch corresponding a movable flange. are normally pushed back from the elastic and have positions which angularly shifted for two them submitted bias control such as cam. An angular shift 120°-α/3 (=240°-2/3α) with complement 120°+2/3α, αbeing angle forming each tooth toothed ring teeth