The invention relates to a
crank-slider-driven swing mirror mechanism, which comprises a swing mirror and mirror frame
assembly, a swing mirror principal section adjusting mechanism, a
rotary encoder, a motor and transmission mechanism, and a
machine frame. The swing mirror and mirror frame
assembly comprises a swing mirror, a nylon
cushion block, a wedge-shaped pressing block, a threaded check ring, an inner mirror frame, an outer mirror frame, an outer mirror frame end cap, an outer mirror frame upper cover plate, a rotating half shaft, a first bearing end cap, a second bearing end cap and a
machine frame antifriction bearing. The swing mirror principal section adjusting mechanism comprises an inner mirror frame adjusting block, a first adjusting screw rod and a second adjusting screw rod. The motor and transmission mechanism comprises a motor, a motor bracket, a synchronous belt, a small
pulley, a large
pulley, a horizontal sliding block, a horizontal guide rail, a hinge bar, an L-shaped connecting block, a connecting rod, a
crankshaft bearing, a connecting rod cap, a
crankshaft, a
crankshaft bearing end cap and a crankshaft antifriction bearing. According to the technical scheme of the invention, the small-angle deflection movement of the swing mirror is converted into the long-distance rectilinear movement of a slider by the
crank-slider-driven swing mirror mechanism. In this way, the high-precision deflection movement of the swing mirror can be realized based on the low-precision rectilinear movement of the slider, and the requirement on the control accuracy is lowered.