Rotary clamping mechanism

The utility model relates to the technical field of wire spindle detection, in particular to a rotary clamping mechanism which comprises a mounting table, a main shaft, a fixed clamping plate, a movable clamping plate, an elastic reset part and an unlocking assembly, the bottom of the main shaft rotatably penetrates through the mounting table, a supporting groove is formed in the top of the main shaft, and the bottom of the fixed clamping plate is fixedly arranged on one side of the supporting groove; the bottom of the movable clamping plate is slidably arranged at the bottom of the supporting groove, and the wire spindle sleeves the fixed clamping plate and the movable clamping plate and abuts against the top of the main shaft; the elastic reset piece is arranged between the movable clamping plate and the fixed clamping plate so that the movable clamping plate can always have the tendency of sliding in the direction away from the fixed clamping plate. The unlocking assembly is arranged between the mounting t