Pupil distance adjusting mechanism of light feeding instrument

The utility model relates to the technical field of light feeding instruments, in particular to an interpupillary distance adjusting mechanism of a light feeding instrument, which comprises a light feeding instrument shell, two sight tubes, a rotating shaft, a bidirectional screw rod, two movable parts, a connecting shaft, a limiting groove, a limiting block and a knob, and the rear sides of the bottoms of the two sight tubes are respectively connected to the bottom of the inner wall of the light feeding instrument shell through the rotating shaft. One end of the two-way screw rod is connected to the left side of the inner wall of the light feeding instrument shell through a bearing, the other end of the two-way screw rod penetrates through the light feeding instrument shell and extends to the right side of the light feeding instrument shell, the two movable parts are in threaded connection to the surface of the two-way screw rod, and one end of the connecting shaft is fixedly connected to the bottoms of the