Höhenverstellvorrichtung für einen Fahrzeugsitz

摘要

The regulator consists of an arm connected to a support by an articulated joint (8) and having a curved toothed sector (12) meshing with a pinion (11) which rotates on the support. The arm is in two sections (13, 14) linked by a pivot (15) with its axis parallel to that of the articulated joint (8). It has at least one coupling (20) with a pre-set resistance, to break when the force applied by one of the two sections relative to the other about the pivot exceeds a threshold level. At least one of the arm's sections has a main curved toothed sector (17) with the centre of its arc located on the axis of the articulated joint (8), while the other has a secondary toothed sector (18) centred on the same axis. The pinion is located between the two toothed sectors, and the distance between them is such that the pinion meshes only with the main one when the two sections of the arm are linked rigidly together and with the second sector (18) when the coupling (20) is broken.