Passive seatbelt system

Claim 2

A passive seatbelt system for an automotive vehicle wherein means for driving an occupant restraining webbing is automatically operated in accordance with actions of an occupant getting into and out of the vehicle to fasten the webbing to or unfasten from the occupant, characterized by comprising a drive control circuit for generating a control output for a predetermined period of time to operate said means for driving the webbing when the webbing is required to be fastened to or unfastened from the occupant, and further for ceasing the generation of the drive control output to stop the operation of said means for driving the webbing when the webbing has moved to a webbing fastened position or a webbing unfastened position even within the predetermined period of time.

Claim 3

A passive seatbelt system for an automotive vehicle including a webbing, one end of which is movable in the longitudinal direction of the vehicle for restraining or releasing an occupant, comprising: webbing driving means for moving one end of the webbing in the longitudinal direction of the vehicle to fasten the webbing to or unfasten the same from the occupant; seated condition detecting means for detecting that the occupant has seated to emit a signal; door condition detecting means for detecting that the door has been closed to emit a signal; vehicle speed detecting means for detecting that the vehicle speed has reached or exceeded a predetermined speed to emit a signal; fastened webbing detecting means for detecting that the webbing has moved to a webbing fastened position to emit a signal; unfastened webbing detecting means for detecting that the webbing has moved to a webbing unfastened position to emit a signal; and a control circuit for driving said webbing driving means for a predetermined period of time in response to the signals from said seated condition detecting means and said door condition detecting means, or said vehicle speed detecting means, and for stopping to drive said webbing driving means in response to the signal from said fastened webbing detecting means or said unfastened webbing detecting means.

Claim 4

A passive seatbelt system for an automotive vehicle including a webbing, one end of which is movable in the longitudinal direction of the vehicle for restraining or releasing an occupant, comprising: webbing driving means for moving one end of the webbing in the longitudinal direction of the vehicle to fasten the webbing to or unfasten the same from the occupant; seated condition detecting means for detecting that the occupant has seated to emit a signal; door condition detecting means for detecting that the door has been closed to emit a signal; vehicle speed detecting means for detecting that the vehicle speed has reached or exceeded a predetermined speed to emit a signal; fastened webbing detecting means for detecting that the webbing has moved to a webbing fastened position to emit a signal; unfastened webbing detecting means for detecting that the webbing has moved to a webbing unfastened position to emit a signal; and a control circuit for driving said webbing driving means for a predetermined period of time in response to the signals from said seated condition detecting means and said door condition detecting means, or said vehicle speed detecting means, and for stopping to drive said webbing driving means in response to the signal from said fastened webbing detecting means or said unfastened webbing detecting means.

Claim 5

A passive seatbelt system as set for claim 2, wherein said control circuit is adapted to drive warning means when the seated occupant signal from said seated condition detecting means and the closed door signal from said door condition detecting means are fed and no signal is fed from said fastened webbing detecting means, and when the signal informing that the vehicle speed has exceeded a predetermined speed is fed from said vehicle speed detecting means.

Claim 6

A passive seatbelt system as set forth in claim 2, wherein said control circuit is adapted to drive said webbing driving means to release the webbing when the signal for releasing the fastened webbing is fed from said unfastened webbing detecting means and the signal informing that the vehicle speed has reached or exceeded a predetermined speed is not fed from said vehicle speed detecting means.

Claim 7

A passive seatbelt system as set forth in claim 2, 3 or 4 wherein said fastened webbing detecting means is a limit switch provided at a position adjacent the rear end of a guide rail, to which position reaches a slide plate slidable along said guide rail in the longitudinal direction in the vehicle, and said unfastened webbing detecting means is a limit switch provided at a position adjacent the forward end of said guide rail, to which position reaches said slide plate.