Push-button switch, and operating device and teaching pendant comprising the same

摘要

A switch shifted to ON or OFF states according to increase in the amount of depression of a push button. The push button switch comprises the push button, a case for depressibly supporting the push button, a first contact disposed in the case, and a second contact disposed in the case in opposed relation with the first contact; the push button switch being shifted, in conjunction with a depression of the push button, from at least an ON state in which said first and second contacts are in contact, and then shifted to an OFF state in which the first and second contacts are again out of contact. The push button switch is provided with a lock/reset mechanism which operates to hold the push button in a depressed state when the switch is in said second OFF state and which releases the depressed state by a reset operation.