Operating mechanism and manual opening and closing limiting structure

The invention relates to an operating mechanism and a manual opening and closing limiting structure. The manual opening and closing limiting structure comprises a rotating shaft which is provided with a threaded section, a nut and two limiting seats, wherein the nut is in threaded connection with the threaded section, and the nut reciprocates in the axial direction of the rotating shaft; the number of the limiting seats is two, the two limiting seats are arranged at the two ends, in the axial direction of the threaded section, of the rotating shaft correspondingly, the two limiting seats are each provided with a limiting part, the position of at least one limiting part is adjustable in the axial direction of the rotating shaft, and the two limiting parts are used for limiting the nut to move in the axial direction of the rotating shaft, and the axial movement stroke of the nut corresponds to the opening and closing stroke of the switch body. In the process of assembling the operating mechanism, the initial po