| 摘要 |
An emergency escape device for a building wall includes an emergency door mechanism and a control assembly. The emergency door mechanism includes a door panel, a ladder, a rigid support arm and a driving assembly. The door panel is mounted pivotally on the wall and is movable relative to the wall between a closed position, wherein the door panel is flush with the wall, and an open position, wherein the door panel is perpendicular to the wall. The ladder has an upper end which is connected pivotally to the upper end of the door panel and a lower end which extends to the ground surface when the door panel is located in the open position. The support arm is mounted pivotally on the wall below the lower end of the door panel at one end and is connected pivotally to the ladder at the other end thereof so as to prevent swaying of the ladder when the door panel is in the open position. The driving assembly is operable to move the door panel between the closed and open positions. The control assembly is connected electrically to the driving assembly and is operable to activate the driving assembly.
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