Small-sized direct current rotary electric appliance

Abstract

A small-sized direct current rotary electric appliance comprises a stator provided with a cylindrically shaped permanent magnet. A rotary armature rotates in the magnetic field of said permanent magnet, and brushes are fixedly provided on a part of said stator. The rotary armature is constructed with a rotor shaft, a soft magnetic core being fixedly provided on the rotor shaft with a plurality of winding continuously wound for a predetermined number of turns around the core in such a way that the portions of the windings located at both end surfaces of the core in the axial direction thereof constitute terminal connections. The portions located on the periphery of the core in the axial direction thereof are substantially parallel to the rotor shaft, and a disc-shaped commutator plate is disposed in at least one of recesses formed at both end surface parts of the core in its axial direction by both end surfaces of the core in its axial direction and with the terminal connections of the windings raised above both end surfaces. The commutator plate is fixedly provided on the rotor shaft so as to be substantially perpendicular thereto. The brushes are each formed of an integral structure consisting of a first spring element in a right-angled U-shape and a second spring element supporting the first spring element approximately at the middle of the parallel arm portions thereof, the open ends of the first spring element forming contact points, and the ends of the second spring element opposite to the above-mentioned supporting ends forming the securing ends therefor.