Patent ID: 7393052

Claim:
A vehicle seat assembly comprising: a seatback frame; an active head restraint system including a head restraint adapted to move between an upright position and an operative position relative to said seatback frame in response to an input force applied to said active head restraint system and at least one biasing member operable to provide resistance to movement of said head restraint away from the upright position and toward the operative position; and at least one linkage moveably attaching said active head restraint system to said seatback frame at a pivot point, wherein said biasing member is operatively attached to said linkage at an attachment point, said attachment point is offset in spaced relationship to said pivot point, said biasing member defines a line of action, and a reference line extending from said pivot point to said attachment point is offset at a positive angle relative to a bias moment arm extending perpendicularly from said line of action to said pivot point.