Airbageinheit

摘要

An air bag module constructed by integrating an air bag, an inflator, a crash sensor and an auxiliary power supply circuit. The air bag module is equipped with either a contact for opening a squib short circuit or a switch for opening a control circuit or the auxiliary power supply circuit, so that it may not be started before a retainer is fixed on the steering wheel by means of bolts, even if connected with a car battery. The contact is opened or the switch is closed, as the bolts are driven, to prevent a malfunction. In order to prevent the contact from returning to its closed position or the switch from returning to its closed position or the switch from returning to its open position even if the bolts become slack after use of many years, the contact is broken or irreversibly switched from its closed to open positions by the bolts driven into the internal threads, or the switch is switched through the control member which is irreversibly actuated by the bolts driven into the internal threads. Thus, the air bag module is prevented from becoming inoperative.