DEVICE FOR ADJUSTING THE TILT OF A VEHICLE SEAT BY SMALLER INCREMENTS

Vehicle seat articulation (10) allowing angular adjustment of a backrest relative to a seat base, the articulation comprising two flanges (7,8), the first flange comprising a base toothing on a border directed inward, with N teeth spaced at an angular pitch of 360/N degrees, a series of first pawls (21) cooperating with a first control cam (31) biased by first springs (41), a series of second pawls (22) cooperating with a second control cam (32) biased by second springs (42), a control hub (1) to move the control cams toward an unlocking position against the first and second springs, in which the toothings (27) of the series of first pawls are angularly offset by at most half a tooth relative to the toothings (28) of the series of second pawls, thereby obtaining a locking pitch at least twice as fine.