ELECTRIC SWITCH WITH A DRIVE SHAFT AND A BLOCKING MECHANISM FOR BLOCKING ACTUATION OF THE DRIVE SHAFT

摘要

The invention relates to an electric switch (102) having a drive shaft (3) that can be actuated by means of a hand crank (5) and a blocking mechanism for blocking actuation of the drive shaft (3), wherein the hand crank (5) has a shaft (6) that can be displaced along the drive shaft (3) and that is protected against removal by the drive shaft (6) and a crank arm (7) that is axially fixed on the shaft (6) and is wound by the shaft. In order to configure the blocking mechanism in such a way that a blocking force substantially smaller in comparison with the torque of the drive shaft is needed in order to block actuation of the drive shaft (3), a recess (14) is provided on the front side (104) of the switch (102), into which the crank arm (7) can be lowered in an anti-rotational manner by displacing the shaft (6), wherein the blocking mechanism that has been activated for blocking fixes the shaft (6) axially once the crank arm (7) has been lowered into the recess (14).