Abstract: A seat belt retracting and winding device comprises a housing, a winding shaft rotatably mounted within the housing, a seat belt wound around the winding shaft with one end made fast to the winding shaft, a first and strong spring with one end made fast to the housing, a second and weak spring with one end made fast to the winding shaft, the second spring being connected in series to the first spring, and a control means which may cause the first spring not to exert its returning force on the seat belt in the direction in which is wound the seat belt when the seat belt is unwound and extended against the forces of both the first and second springs and is fastened and which may cause the first spring to exert its turning force on the seat belt when the latter is unfastened.

Abstract: In a safety inflatable bag apparatus for protecting occupants of a vehicle, when collision of a vehicle occurs, a blocking cock of a high pressure gas container is destroyed by explosion of ignitors, as a result of which high pressure gas is released from the container into the inflatable bag to inflate it for restraining the occupant. By-product fragments or pieces produced upon the explosion of the ignitors are collected in a collecting chamber disposed at a bent portion of a duct connecting the high pressure gas container and the inflatable bag, thereby to eliminate the need for a conventional filter or prevent the filter, if used, from being clogged.