Seat belt retractor employing ultrasonic motor

Details Seat belt retractor employing ultrasonic motor Seat belt retractor employing ultrasonic motor

1996-04-05

1998-06-16

Jillions, John M.

Winding, tensioning, or guiding

Reeling device

With particular drive

180268, 280806, 280807, 297478, 2423826, B60R 2210, B60R 2240, B60R 2234

Patent

active

057657742

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.

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