Positioning device for rotary lifting of test box, rotary lifting mechanism and exposure device

The invention relates to a positioning device for rotary lifting of a test box, a rotary lifting mechanism and an exposure device. The positioning device is mounted on a rotary lifting device of the test box. The positioning device comprises: a mounting base mounted on an action execution part of the rotary lifting device of the test box; a supporting rod, wherein one end of the supporting rod isarranged in the mounting base in an axial sliding mode through a spring, and the other end of the supporting rod is elastically supported on the supporting plate under the action of the spring; a plurality of rotary positioning parts arranged on the supporting plate, wherein the rotary positioning parts are respectively positioned around the rotary center of the test box rotary lifting device; a first microswitch mounted on the mounting base and located at the starting end of axial sliding of the supporting rod; and a second microswitch mounted on the mounting base and located at the tail endof the supporting rod slid