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Active headrest of a vehicle that rotates horizontally and moves laterally based on angle and direction of inertia force caused by rear-impact

  • US 7,640,090 B2
  • Filed: 03/14/2008
  • Issued: 12/29/2009
  • Est. Priority Date: 03/15/2007
  • Status: Expired due to Fees
First Claim
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1. A headrest control apparatus, comprising:

  • a headrest moving mechanism that supports a headrest in such a manner that the headrest is allowed to rotate about an axis of the headrest, which extends in a height direction of a vehicle;

    an actuator that generates drive power used to rotate the headrest;

    a headrest control unit that controls an orientation of the headrest by operating the actuator; and

    an inertia force direction prediction unit that predicts a direction of an inertia force applied to an occupant in the vehicle when a collision to a rear portion of the vehicle occurs,wherein the headrest control unit calculates a target value for a rotation amount of the headrest based on an angle between the direction of the inertia force predicted by the inertia force direction prediction unit and a longitudinal axis of the vehicle, and rotates the headrest based on the calculated target value.

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