The disclosure relates to an operating mechanism for a switchgear device, including a rotatable output shaft configured for achieving an opening or closing operation of the switchgear device by rotation, a rotatable energy storage lever and a spring, whereby the energy storage lever is configured for being rotated by a motor so as to drive the spring to be compressed for storing energy, and a rotatable drive lever torque-proof connected to the output shaft, rotatably connected to the energy storage lever and free-wheeling connected to the spring allowing a rotability between the drive lever and the spring of 60 for achieving the opening or closing operation of the switchgear device, whereby the spring is configured, during at least one of the opening and closing operation of the switchgear device, for releasing energy so as to rotate the drive lever after passing through the spring's dead-point position.