Backrest angle setting system for vehicle seat has motor driving drive shaft and spring and at least partly compensating for weight of person using seat

摘要

The setting system (6) has at least one transmission fitting (10) driven by a drive shaft (9), and first and second fitting parts (11, 12), one connected to the backrest (4), and the other to the seat part (3), with a spring (50) between them. A motor (7) drives the drive shaft. The spring compensates not only for the weight of the backrest, but also at least partly for the weight of the person using the seat.