Safety belt buckle device with automatic unlocking

摘要

The device comprises automatic unlocking means for a fastening member connected to the belt and actuating means for the unlocking which are sensitive to a parameter of the state of a movable structure in which the safety belt is installed. The automatic unlocking means comprise means for automatically exerting a force against elastic means on a triggering device. The means for automatically exerting a force comprise a metallic element capable of exerting a force when heated, and heating means for this metallic element.