Abstract: A position of a head of an occupant from an instrument panel, for example, of a vehicle is measured with a predetermined period of time and the position of the head after a predetermined time is estimated from the measured position, whereby an ignition signal is supplied to a detonator at a suitable timing determined by the estimated position thereby to inflate an air bag. The distance of the head of the occupant from the instrument panel is divided into an inflation suppression area, an inflation area without timing delay and an inflation area with timing delay. When it is determined that the head of the occupant locates in the inflation area with timing delay, the time point at which the head shifts to the inflation area without timing delay is estimated and the air bag is inflated on the basis of the estimated time point.

Abstract: A position of a head of an occupant from an instrument panel, for example, of a vehicle is measured with a predetermined period of time and the position of the head after a predetermined time is estimated from the measured position, whereby an ignition signal is supplied to a detonator at a suitable timing determined by the estimated position thereby to inflate an air bag. The distance of the head of the occupant from the instrument panel is divided into an inflation suppression area, an inflation area without timing delay and an inflation area with timing delay. When it is determined that the head of the occupant locates in the inflation area with timing delay, the time point at which the head shifts to the inflation area without timing delay is estimated and the air bag is inflated on the basis of the estimated time point.

Abstract: A resin molded article having a moveable projecting portion suitable for use in forming a keyboard or keyboard switch and which is substantially free from flex fatigue. At least the moveable projecting portion of the molded article is formed from a resin composition containing a polyether ester block copolymer and a small amount of an alkali metal salt of an aliphatic carboxylic acid having 10 to 36 carbon atoms. The polyether ester block copolymer contains units from terephthalic acid, tetramethylene glycol and polyoxytetramethylene glycol. The resin molded article includes a thick projecting (moveable) portion, a base portion and a flexible thin side portion connecting the thick projecting portion to the base portion. The side portion has a thickness of 0.05 to 0.5 mm and a flexibility retention of at least 85%.