Abstract: A motor-driven hinge device may include a hypocycloid hinge mechanism driven by a drive shaft, two metal side plates intended for connection to the seating portion and to the backrest, a brushless motor, and a planetary gear train positioned between the brushless motor and the drive shaft. The planetary gear train may include a sun gear connected to the motor rotor, and a plurality of planet gears, each planet gear having a first set of teeth engaging with the sun gear and with a first stationary ring gear, and a second set of teeth engaging with a second ring gear rigid with the drive shaft.

Abstract: Motor-driven hinge device comprising a hypocycloid hinge mechanism (7) driven by a drive shaft (8), comprising two metal side plates (71,72) intended for connection to the seating portion (11) and to the backrest (12), a brushless motor (20), and a planetary gear train (30) positioned between the brushless motor (20) and the drive shaft (8), the planetary gear train comprising a sun gear (6) connected to the motor rotor, and a plurality of planet gears (3), each planet gear comprising: a first set of teeth (31) engaging with the sun gear (6) and with a first stationary ring gear (4), and a second set of teeth (32) engaging with a second ring gear (5) rigid with to the drive shaft (8).

Abstract: An adjustment mechanism for vehicle seat, comprising a gearbox, an eccentric element driven by a driving unit, an eccentric gear wheel rotatably mounted on the eccentric element, a drive output unit equipped with an inner gear ring which cooperates with the eccentric gear wheel by partial engagement of the teeth, a sliding block equipped with a first and a second longitudinal guide, the sliding block cooperating with the eccentric gear wheel by the first longitudinal guide, the sliding block cooperating with the gearbox by the second longitudinal guide, the material of the second longitudinal guide having a lower hardness than the hardness of the material of the eccentric gear wheel.

Abstract: An adjustment mechanism for vehicle seat, comprising a gearbox, an eccentric element driven by a driving unit, an eccentric gear wheel rotatably mounted on the eccentric element, a drive output unit equipped with an inner gear ring which cooperates with the eccentric gear wheel by partial engagement of the teeth, a sliding block equipped with a first and a second longitudinal guide, the sliding block cooperating with the eccentric gear wheel by the first longitudinal guide, the sliding block cooperating with the gearbox by the second longitudinal guide, the material of the second longitudinal guide having a lower hardness than the hardness of the material of the eccentric gear wheel.