Safety device for motor vehicle's seat, has backrest mounting unit arranged between lower and upper parts such that support on lower part enables rotational movement of upper part towards front side when device is mounted

摘要

The device (1) has a bedrest lower part (4) arranged against an upper zone (12) before a backrest. The lower part and a headrest upper part (3) are associated with each other in a rigid manner relative to rotations applied along a transversal axis (2). A mounting unit (5) mounts the backrest in rotation along the axis. The mounting unit is arranged between the lower and upper parts such that a support on the lower part enables a rotational movement of the upper part towards front side when the device is mounted.