Actuating device for a brake

The present invention has a power generator (7) which makes an angle of action (alpha) about the vertical-axis line of a lever (1) and a lever (1), and applies power (F) to a lever (1), It is related with the brakes 40, 41, and 43 and the operation equipment for 50 which give the output power F to a means (40, 41, 42, 43, 50) to generate a braking effort according to input quantity (F). From now on, it will leave and the operation equipment instead of for the brakes which enable output and remarkable reduction of the demand of energies as compared with the equipment operated directly will be shown. This is made possible by operating characteristics with little friction produced by selection of the material of operation equipment which is structural-constituted and/or is used. The desirable use field of the present invention is a braking system made to operate electrically in a commercial vehicle.