Patent ID: 7717517

Claim:
A headrest for vehicles comprising: a stationary plate secured to a seat back; an attachment shaft supported by the stationary plate; a coil spring wound about the attachment shaft, two ends of the coil spring being, respectively, a fixed end and a free end, and an inner diameter of the coil spring being smaller than an outer diameter of the attachment shaft when said spring is in a relaxed state; and a headrest base plate attached to the stationary plate so that it is turnable forward and rearward relative to the stationary plate; wherein the fixed end of the coil spring is provided on the base plate and the attachment shaft is secured to the stationary plate or the fixed end of the coil spring is provided on the stationary plate and the attachment shaft is provided so as to be integral with the base plate; a winding direction of the coil spring is set in a direction that tightens the spring by a rearward turning of the base plate, thus restricting the rearward turning of the base plate; a release member for moving the free end of the coil spring in a direction that loosens the free end of the coil spring to release the restriction on the rearward turning of the base plate is provided on the base plate; the base plate turns through an angle adjustment range, which is from an initial position above the seat back to an adjustment limit position fixedly inclined forward, and further to a retracting position that exceeds the angle adjustment range in the forward direction; the stationary plate is provided with a control plate; and the base plate is provided with a control member which is linked to the release member for acting on the control plate and allowing or restricting the turning of the base plate from the initial position to the retracting position.