Patent ID: 6935456

Claim:
An automotive seat safety mechanism including an automotive seat having a seat cushion and a seat back, which is arranged on a rear portion of the seat cushion, and a webbing arranged between the seat back and an upper portion of a vehicle, wherein a retractor urges the webbing in a winding direction to draw in the webbing while simultaneously permitting the webbing to be drawn out of the reactor in an unwinding direction when in a normal state and prevents the webbing from being drawn out when acceleration or deceleration of the vehicle becomes greater than or equal to a predetermined value, the automotive seat safety mechanism comprising: a bypassing mechanism arranged above the seat back; and a pretensioner included in the retractor; wherein the retractor is arranged rearward from the seat back in the upper portion of the vehicle; wherein the webbing has an end secured to an upper position of the seat back and is extended to the retractor through a guide that is engaged with the bypassing mechanism; wherein the guide with the webbing is disengaged from the bypassing mechanism when forward deceleration of the vehicle becomes greater than or equal to a predetermined value; and wherein the pretensioner of the retractor is activated to quickly draw in the webbing in the winding direction in response to the forward deceleration.