Fixing device for standard sheet of measuring instrument

The utility model discloses a fixing device for a standard sheet of a measuring instrument, which comprises a supporting cylinder, the inner side surface of the upper end of the supporting cylinder is in threaded connection with a first convex cylinder, the inner side surface of the first convex cylinder is provided with a standard lens, the inner side surface of the first convex cylinder is in threaded connection with a second convex cylinder, and the two groups of convex cylinders are in threaded connection and fixation. The standard lens can be clamped and fixed, the first convex cylinder is twisted to rotate up and down, the standard lens can be directly driven to be adjusted and calibrated up and down, adjustment and mechanism detection are convenient, and the mechanical cost is low. 本实用新型公开了测量仪标准片的固定装置，包括支撑筒，所述支撑筒的上端内侧表面通过螺纹连接有第一凸筒，所述第一凸筒的内侧表面放置有标准镜片，所述第一凸筒的内侧表面通过螺纹连接有第二凸筒，通过两组凸筒螺纹连接固定，可夹持标准镜片固定，扭动第一凸筒上下旋转，可直接带动标准镜片上下调节校准，便于调节，机构检测，机械成本低。