초록 ▼

A seat belt system of the conventional three point restraint type includes an electric motor which replaces the usual rewind spring on the belt retractor. When the seat belt is buckled up, the motor is set into operation and pulls the shoulder belt up into engagement with the body of the occupant in

A seat belt system of the conventional three point restraint type includes an electric motor which replaces the usual rewind spring on the belt retractor. When the seat belt is buckled up, the motor is set into operation and pulls the shoulder belt up into engagement with the body of the occupant in the seat, and then is pulsed backward to provide safe tensionless comfort in which the seat belt is located close to the body of the person being restrained but safely spaced away from the body of the occupant. The cycle of tightening of the belt and then releasing it by a predetermined short distance to provide the tensionless comfort position is repeated whenever the occupant either closes the seat belt buckle, shifts the position of the seat by operating the seat release or seat reclining levers, or leans forward beyond the tensionless range, thereby applying tension to the seat belt. The motor may be pulsed backward by a capacitor, or other means in combination with a switching circuit which applies a reverse pulse from such capacitor or other means to the motor, following tightening up of the belt. The system includes a seat sensor means, a belt tension sensor means, a vehicle speed sensor means for causing re-check of belt tension, and a system operation signal light.

대표청구항 ▼

An automatically adjustable safety seat belt system for automobiles or other vehicles including a safe tensionless comfort range comprising: seat belt means for restraining a person in a vehicle seat; means including a reversible electric motor for automatically adjusting comfort in which the belt m

An automatically adjustable safety seat belt system for automobiles or other vehicles including a safe tensionless comfort range comprising: seat belt means for restraining a person in a vehicle seat; means including a reversible electric motor for automatically adjusting comfort in which the belt means is located close to the body of said person but is spaced safely away from the body; said system including circuit means for operating said electric motor to retract said seat belt from the fully extended configuration until said seat belt means is tight, and for then pulsing said motor in the opposite direction to shift said belt means into the safe tensionless comfort range; and means for automatically readjusting said seat belt means to a tensionless comfort range as defined above, whenever the person shifts the position of said seat or leans forward beyond the tensionless range to apply tension to said seat belt; whereby the possibility of extra slack being present between the belt and the person being protected, and the consequent danger to said person is minimized.