This paper proposes that the principle of bicycle friction brake is used to design a self-help slow-descending escape sys-tem, which is control ed by the frictional force. In this system, additional weight ( added friction) and lever principle ect. are used to control its speed without any help. This apparatus can be used to help people escape from high-rise fires, explosions ect. and it is perfectly chosen for the residents living in high-rise building.%利用自行车摩擦片刹车原理,提出了一种基于控制摩擦力大小来减速的高楼自助缓降逃生装置的设计思路。在经过理论计算的基础上设计了样机。该逃生装置通过配重以及利用杠杆原理等方法来放大摩擦力,以此达到控制下降速度的目的,无需外力操控,可作为被困于高楼火灾、爆炸等困境的人们的自救逃生工具。
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