Motor-driven roll screen.

摘要

A motor-driven roll screen has a limit switch (5) mounted at its lower weighted end so that the switch (5) is actuated when the lower end of the screen (1) meets an obstruction, the screen (1) having a conductor (7) located along its side edge to connect the limit switch (5) to an arrangement at the top of the roll screen for winding or unwinding the roll screen.