Headrest apparatus for a vehicle seat

摘要

According to an aspect of the present invention, a headrest apparatus for a vehicle seat includes a support portion mounted on the vehicle seat, a movable portion supported at the support portion for moving forward, a first arm and a second arm being crossed and rotatably connected each other by a rotation axis and supporting the movable portion to the support portion, and a biasing member provided between the support portion and the movable portion for biasing the movable portion forward relative to the support portion.