Patent ID: 7456368

Claim:
A safety switch comprising: an actuator provided to an opening/closing door for opening and closing a doorway of a working space where a machine is disposed and a door switch provided to an edge portion of the doorway and having a connection contact of a switch portion which is switched in response to entry of the actuator into an operating portion to allow operation of the machine when the opening/closing door closes the doorway, wherein the safety switch includes: a slider for reciprocating toward the door switch while retaining the actuator to cause the actuator to enter the operating portion and to withdraw the actuator from the operating portion; and a slide key device integrally formed of a slider movement preventing member for controlling movement of the slider and a lock for controlling the slider movement preventing member by operating a key, and wherein the slide key device is configured to select movement prevention for preventing movement of the slider with the slider movement preventing member by operating the lock with the key or cancellation of the movement prevention.