Automatic seat belt applying device

Claim 1

An automatic seat belt applying device for use in a vehicle, comprising: a shoulder belt for confining the shoulder of an occupant; a shoulder belt drive assembly comprising a first guide rail set in place along the roof side rail of a vehicle, a first wire having such rigidity as enables the first wire to be pushed and pulled and set in place in said first guide rail, a first driving gear set in place on said roof side rail and operatively connected with said first wire for reciprocating the first wire in said first guide rail, a first couple of limit switches arranged at both ends of said first guide rail, and a first slide member fixed on said first wire and loosely supporting said shoulder belt; a lap belt for confining the occupant on the waist; a lap belt drive assembly comprising a second guide rail set in place diagonally on the interior surface of a door facing the position for confining the occupant, a second wire having such rigidity as enables said second wire to be pushed and pulled and set in place in said second guide rail, a second driving gear set in place on said interior surface of the door and operatively connected with said second wire for reciprocating said second wire in said second guide rail, a second couple of limit switches arranged adjacent to the both ends of said second guide rail, and a second slide member fixed on said second wire and loosely supporting said lap belt; said shoulder belt drive and lap belt drive assemblies being assembled respectively into one single entity; and an electric circuit for operating each of said first and second driving gears comprising a line having a door switch arranged on the grounding side of each one of said First and second limit switches, a line having each of said first and second limit switches connected in parallel to the power source line for said each driving gear, and a plurality of relays set in place for each and every one of said first and second limit switches.