| 摘要 |
Disclosed is an inflatable seat belt apparatus in which, under ordinary conditions, a bag-shaped belt (2b) of a shoulder belt (2) and a lap belt (3) are maintained in a belt-shaped form and a control member (5d) for controlling the opening area of a through-hole is maintained at an opening-area reducing position. Accordingly, the two belts (2b), (3) are prevented from turning over and twisting so that the seat belt apparatus (1) performs a function similar to that of the conventional seat belt apparatus. In the event of an emergency such as a vehicular collision, a gas generator (8) is actuated and generates a gas which causes the lap belt (3) to inflate. The gas which has filled the lap belt (3) causes the control member (5d) to move to the position at which it enlarges the opening area of the through-hole. Accordingly, the gas easily flows into the bag-shaped belt (2b) of the shoulder belt (2) ahead of a tongue (5). Thus, the bag-shaped belt (2) and lap belt (3) expand instantaneously and in a reliable fashion.
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