Safety mechanism for mechanical trigger device of gas generator

摘要

A safety mechanism is provided for a mechanical trigger device of a gas generator. The mechanical trigger device has an inertia body, which is displaceable upon application of a deceleration of at least a predetermined value, and a mechanical trigger for actuating the gas generator in response to a displacement of the inertia body. The safety mechanism comprises a device for selectively setting the trigger in a first state where the trigger is operative or in a second state where the trigger is prevented from operation. This setting device has a member displaceable between a first position where the trigger is set in the first state and a second position where the trigger is set in the second state. The safety mechanism also comprises a cover member for being mounted to cover the setting device. This cover member has mount-preventing member for interfering with the displaceable member located in the second position so that mounting of the cover member is prevented.