Patent ID: 7717508
Filing Date: 2010-05-18
Classification: B60N

Abstract:
1. A headrest of an automotive vehicle seat comprising: a carrier structure including at least one bar and a supporting member, said carrier structure being connected to said supporting member through at least one guide region, and said supporting member being movable with respect to said carrier structure along a linear forward path of travel from a normal position of utilization into an accident position in which said supporting member is located both in the x direction and in the z direction in front of the position of utilization; and a drive unit comprising a tension spring and a blocking device, the blocking device blocking a movement of said tension spring in the position of utilization and including a first blocking part blocking in the position of utilization and a disengagement device, the first blocking part including an oblong opening through which engages a driver member of said carrier structure, said driver member being moveable relative to said supporting member, wherein in the position of utilization, said tension spring has a high tensile force and the tension spring acts on said first blocking part and, in the accident position, the tension spring has a low tensile force, the disengagement device is in an actuated state and said first blocking part does not hold back said tension spring.