Abstract: A casing body made by forming a synthetic resin into a bottomed cylinder-like configuration with a first bracket integrally provided at one end of a cylindrical portion. The cylinder body includes a plurality of clamping portions connected at their base ends to the first bracket at locations equally spaced circumferentially of the cylindrical portion, and magnet retaining portions each protruding to opposite sides from a tip end of each clamping portion. When the casing body is formed by molding, a yoke and a plurality of magnets are integrally coupled to each other. The yoke is clamped between the clamping portions and the cylindrical portion, and the magnets abut against an inner surface of the yoke with their circumferential opposite side ends being defined by the clamping portions and with their axially opposite ends being defined by the first bracket and the magnet retaining portions.

Abstract: An electric rotating machine includes a guide groove in a brush holder fixedly disposed sideways of a commutator, a coil spring mounted under compression between a closed outer end of the guide groove and a brush for exhibiting a spring force to bring an end of the brush projected from the guide groove into sliding contact with the commutator, and a cover mounted to the brush holder to cover the guide groove. The guide groove is provided at its closed outer end with a recess for receiving and holding one end of the coil spring. The brush holder includes a main holder portion having the guide groove, and a fastening portion connected to one side of the main holder portion and having a single threaded bore. The cover is of a shape to cover the brush holder and has an engage portion engages an outer side of the brush holder so as to inhibit the turning of the cover about the axis of the threaded bore. A threaded member is inserted through the cover and screwed in the threaded bore.