| 摘要 |
The invention relates to a motor vehicle seatback assembly consisting of a backrest (1) and a headrest (2) which in turn comprise a rigid structure (3) and upholstery which surrounds said rigid structure (3). The invention is characterised in that the back upholstery and the headrest upholstery are arranged such that the difference between a back distance d, D back, i.e. the distance separating the occupant's back from the rigid backrest structure, and a head distance c, D head, i.e. the distance separating the occupant's head from the rigid headrest structure, is less than a determined threshold S. In this way, in the event of a rear-end collision, the occupant's head and body are blocked by the backrest and headrest at essentially the same moment. |
