Abstract: A tongue cover is attached to a grip of a seatbelt tongue such that the tongue cover covers edges of the grip except for an edge to which a plate is attached. The tongue cover may be formed of synthetic resin or rubber that is softer than a resin mold of the grip. The tongue cover, which acts as a cushion, prevents the grip from directly impacting the trim on the inner side wall of a vehicle, thereby substantially reducing the likelihood that the trim will be scratched and/or dented. Moreover, the tongue cover also substantially reduces and/or eliminates noise that is typically caused when a tongue directly impacts trim on the inner side of a vehicle, in the absence of such a tongue cover.

Abstract: A seat belt retractor absorbs impact by deforming a roll made of steel just like reversely rolling up. When acceleration exceeds a threshold for example in the event of vehicle collision, a lock gear is locked by a lock activating mechanism and pawls engage some of internal teeth of a lock base. A webbing is loaded with significantly large tension by the occupant being moved forward due to the acceleration so that extremely large torque is applied to the lock base from the reel through the pawls. Because of this torque, the steel roll plastically deforms just like being reversely rolled up from the inner end so that the webbing is gradually unwound, thereby softening impact acting on the occupant by the webbing.

Abstract: A reel of a seat belt retractor equipped in a automobile for reeling a seat belt is integral with a shaft of an ultrasonic motor. The ultrasonic motor is rotated either one direction or the other so as to retract or draw out the seat belt. A control device for controlling the rotation of the ultrasonic motor by supplying a control signal based on the signals sensed by a buckle sensor which senses a buckle is locked, a tension sensor which senses tension of a seat belt, a speed sensor which senses speed of the automobile, a rotation sensor which senses the rotation degree and a child seat sensor which senses whether child seat is set on a passenger seat.