Tensioning mechanism of grating ruler and grating ruler

The invention discloses a grating ruler tensioning mechanism and a grating ruler, and the mechanism comprises an elastic device which is fixedly connected with a strip-shaped grating through a positioning mechanism, and the strip-shaped grating is disposed in a fixing groove of a ruler housing; the fixing device is used for being fixed on the ruler shell; the first screw penetrates through the fixing device and is fixedly connected with the connecting piece, and the first screw is in threaded connection with the fixing device; the first screw is rotated to pull the connecting piece, the elastic device and the positioning mechanism so as to adjust the linear error of the band-shaped grating. According to the tensioning mechanism of the grating ruler and the grating ruler, the fixing device is arranged on the ruler shell, the first screw penetrates through the fixing device and is fixedly connected with the elastic device through the connecting piece, the elastic device is fixedly connected with the strip-shape