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Headrest apparatus for vehicle

  • US 8,103,415 B2
  • Filed: 09/05/2008
  • Issued: 01/24/2012
  • Est. Priority Date: 09/07/2007
  • Status: Active Grant
First Claim
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1. A headrest for a vehicle, comprising:

  • a headrest rear portion supported at a seatback;

    a headrest front portion movable between a fully closed position in which the headrest front portion is close to the headrest rear portion, and a fully open position in which the headrest front portion is away from the headrest rear portion;

    driving means for moving the headrest front portion;

    a capacitance sensor detecting a change in capacitance in association with an approach of the head of an occupant;

    controlling means for controlling the headrest front portion to move to the fully open position in response to information that a vehicle is approaching from the rear, the controlling means controlling the driving means to stop a movement of the headrest front portion when the head of the occupant is detected on the basis of a detection signal from the capacitance sensor, the controlling means including a first filter having a first cutoff frequency and a second filter having a second cutoff frequency lower than the first cutoff frequency; and

    wherein the controlling means control the first filter and the second filter to start operating at the same time as an operation start of the capacitance sensor.

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