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Backrest for a vehicle seat

  • US 7,703,847 B2
  • Filed: 09/07/2007
  • Issued: 04/27/2010
  • Est. Priority Date: 03/08/2005
  • Status: Expired due to Fees
First Claim
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1. A backrest with head support for a vehicle seat, comprising:

  • a substantially upright backrest;

    a head support mounted in the backrest and adjustable in height with respect to the backrest from a preestablished initial position to a final position commensurate with the height of the head of a person sitting in the vehicle seat, said head support having upper and lower portions;

    a capacitive proximity sensor arranged in the upper portion of the head support and having a sensing field directed obliquely downward to be triggered by the upper portion of the back of the person'"'"'s head;

    wherein said upper portion of the back of the person'"'"'s head has a curvature and said sensing field has a curvature which is greater than that of said upper portion of the person'"'"'s head;

    an indicator responsive to a proximity signal from the proximity sensor dependent on the proximity of said upper portion of the person'"'"'s head to the upper portion of the head support; and

    means for adjusting the height of the headrest to a final position at which said proximity signal is triggered.

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