Patent ID: 8632125
Filing Date: 2014-01-21
Classification: B60N

Abstract:
1. A headrest device comprising: a headrest main body that is provided so as to be moveable in a vehicle longitudinal direction, at an upper end portion of a seat back of a seat in which a passenger sits; a pressure/flexure detecting section that is provided at a vehicle front side of the seat back, and that detects at least one of pressure that is applied to the seat back from a back portion of a passenger seated in the seat, or flexure of the seat back; a headrest moving section that moves in the headrest main body in the vehicle longitudinal direction; and a control section that estimates a current back-set which is a distance between a head portion of a passenger and the headrest main body in a horizontal direction, the estimated current back-set corresponding to at least one of pressure or flexure detected by the pressure/flexure detecting section on the basis of a stored relationship between back-set-value and the at least one of pressure or flexure, and controls the headrest moving section to move the headrest main body such that the back-set becomes a predetermined amount.