The invention discloses an overturning type platform door step-missing-preventing flexible mechanism suitable for urban rail transit, which is characterized in that the step-missing-preventing flexible mechanism is mounted in a mounting groove of a doorsill on the outer side of a sliding door of an urban rail transit platform door, the step-missing-preventing flexible mechanism is of an overturning structure, and the overturning action of the step-missing-preventing flexible mechanism is linked with the opening/closing of the sliding door; when the sliding door is closed, the step-missingpreventing flexible mechanism has a first state that the step-missing-preventing flexible mechanism rotates to be perpendicular to the platform and is upward; when the sliding door is opened, the step missing-preventing flexible mechanism rotates from the upward direction to the interior of the train to a second state parallel to the platform and pointing to the train to be in lap joint with the trainbody. The ste-missing-preventing mechanism is horizontally arranged in the mounting groove of the threshold, and the threshold and the mounting groove are stressed, so that the service life of the step-missing-preventing mechanism in a long-time and high-density treading environment of passengers is guaranteed; the step-missing-preventing mechanism is retracted through the overturning action, andthe step missing prevention mechanism is prevented from invading the train limit when the train runs, so that the risk of wiping the train is avoided.

本发明公开了一种适用于城市轨道交通的翻转式站台门防踏空柔性机构，其特征在于，防踏空柔性机构安装在城市轨道交通站台门的滑动门的外侧的门槛的安装槽中，防踏空柔性机构为可翻转结构，其翻转动作与滑动门的打开/关闭联动，在滑动门关闭时，防踏空柔性机构具有旋转为垂直于站台且向上的第一状态；在滑动门打开时，防踏空柔性机构从朝上开始向列车内部方向旋转为平行于站台指向列车搭接于列车车体的第二状态。将防踏空机构水平设置于门槛的安装槽，由门槛及安装槽受力，保证防踏空机构在乘客长时间、大密度的踩踏环境下的使用寿命；通过翻转动作收回防踏空机构，在列车行驶运动时，避免了防踏空机构侵入列车限界，从而避免了擦车风险。