Patent ID: 6938926

Claim:
A safety device for a comfortable seat, comprising: a seat surface; a backrest transferable between a sitting position and a resting position; a seat belt system including a belt-retracting mechanism arranged in an upper region of the backrest, a belt strap fixed in a region of the seat surface via a belt end fitting and stored on the belt-retracting mechanism, and a belt buckle on a side of the seat surface opposite the belt end fitting configured to couple the belt strap via a belt tongue in accordance with a three-point belt system; and a pretensioning system engaged on the belt end fitting; wherein the belt-retracting mechanism and the pretensioning system are configured to tighten the belt strap in the event of an accident, the pretensioning system configured to tighten the belt strap by retraction of the belt strap only at the belt end fitting side of the belt strap.