The invention relates to the technical field of
medical rehabilitation machinery, and discloses an auxiliary instrument protection device for leg
medical rehabilitation, which comprises a shell, a rotating wheel is movably connected to the middle of the shell, an
electromagnet is fixedly connected to the inner wall of the middle of the rotating wheel, a foot bar is movably connected to the front of the rotating wheel, and a
piston is movably connected to the inner wall of the middle of the rotating wheel. According to the auxiliary instrument protection device, the rotating wheel drives the centrifugal block to move, the centrifugal block drives the
dielectric plate to operate, and the positive plate and the negative plate are matched for use, so that the effect of detecting the rotating speed of the rotating wheel is achieved; since the
centripetal force borne by the centrifugal block in the initial stage is smaller than traction force of the reset spring and does not causes movement, the relative area, being the minimum value, between the positive plate and the negative plate is constant; therefore, as the rotating speed of the rotating wheel increases, the
centripetal force borne by the centrifugal block is larger than the traction force of the reset spring, and at the moment, the centrifugal block moves outwards along the inner wall of the movable groove, and the
voltage between the two polar plates is changed.