An auxiliary handle includes an auxiliary shaft, a joint bracket, and a joint clamp. The auxiliary shaft extends along an auxiliary axis and has two ends. The joint bracket has a bracket axis which is substantially perpendicular to the auxiliary axis, and one end of the auxiliary shaft is rotatably connected to the joint bracket for rotation about the bracket axis. The joint clamp has a joint axis which is substantially perpendicular to the bracket axis, and the joint bracket is rotatably connected to the joint clamp for rotation about the joint axis.
