Patent ID: 8113578
Filing Date: 2012-02-14
Classification: B60N

Abstract:
1. A vehicle seat comprising: a seatback frame; a headrest mounted on the seatback frame so as to be movable in a front-and-back direction by an active headrest mechanism; a collision detector provided on the seatback frame to detect backward movement of a lumbar part of a seat occupant when a rear-end collision occurs; wherein the collision detector and the active headrest mechanism are connected with each other by way of a link mechanism so that the headrest is moved forward by the backward movement of the collision detector to support a head of the seat occupant; wherein at least an upper frame of the seatback frame in which the active headrest mechanism is provided is formed from a cylindrical member, thereby forming a space part surrounded by the upper frame and side frames on left and right sides above the seatback frame; and wherein said link mechanism has a connecting arm connected to the seatback frame by a pivot member, the connecting arm has a first portion extending from the pivot in a first direction and a second portion extending from the pivot in a second direction opposite to the first direction, the first portion is connected to the collision detector, and the second portion is movable in a direction to make contact with the seatback frame to absorb the force of a substantial rear-end collision.