A safety-switch device for mounting on a movable device. An impact surface is mounted on or assembled in a bracket. The bracket, impact surface, and a mounting surface of the movable device form a protective enclosure around the switch. The switch is a switch strip or a switch mat. The impact surface is a separate, movable, rigid or stiff component that serves as an actuator for the switch and is provided as a component that is easily replaceable. A trigger mechanism is provided between the impact surface and the switch. When the impact surface moves from its resting position to its actuation position, the trigger mechanism trips the switch.