Rotary shaft link device

A rotary shaft link device comprising a first shaft, a transmission unit disposed on the first shaft, a second shaft in parallel to the first shaft and a reaction unit disposed on the second shaft, each of the first and second shafts having a pivoted section and an assembled section, at least one link unit in the form of a plate-shaped body being disposed between the transmission unit of the first shaft and the reaction unit of the second shaft, upper and lower ends of the link unit being formed with driving sections respectively engaged with the transmission unit of the first shaft and the reaction unit of the second shaft, whereby when the first shaft is rotated, the link unit responsively moves from a first position to a second position to drive the reaction unit and the second shaft to synchronously rotate, a tail end section of the pivoted section of the first shaft being formed with a rectangular cross-sectional structure and a tail end section of the pivoted section of the second shaft also being formed with a rectangular cross-sectional structure, the assembled sections of the first and second shafts being assembled with a torque module and a driven module, the transmission unit being disposed between the pivoted section and assembled section of the first shaft, the reaction unit being disposed between the pivoted section and assembled section of the second shaft.