PURPOSE: To enable a brake equipment to make finer adjustment of braking force by moving a flux generator and by controlling the flux that goes through a disc.

CONSTITUTION: Under the condition where magnets 3 and 4 are off a disc 2, no braking force can be exercised to an axis of rotation 1 because of the less flux number to go through the disc 2. When an operational lever 9 is moved and displaced, a rod 10 goes towards right against the force of a presser spring, by which magnets 3 and 4 come closer to the disc 2. Thus the number of lines of through flux between magnets 3 and 4 will increase. When the axis of rotation 1 is rotating, the eddy current is generated. So is the electric braking force. The less the clearance is between the disc 2 and the magnets 3 and 4 proportional to the control input of the operational lever 9, the more powerful gets the braking force. By adjusting the control input of the operational lever 9, the braking force can therefore be finely adjusted.