Protective cover device with extrusion preventing function

The utility model discloses a protective cover device with the extrusion preventing function. The protective cover device with the extrusion preventing function comprises an operating knob, a bidirectional power mechanism, a first on-off unit, a second on-off unit, a third on-off unit, a first control unit, a first pressure sensor and a first power source. When the operating knob is at the state of closing of a protective cover, if the first pressure sensor is extruded by a barrier and is at the closed state, the first control unit controls the first on-off unit and the second on-off unit to be at the off state and controls the third on-off unit to be at the on state, and after being at the on state, the third on-off unit is automatically converted to be at the off state after the scheduled time delay t. When the protective cover encounters the barrier in the closing process, closing operation is stopped automatically, the protective cover briefly acts in the opposite direction (the opening direction) in time