SMALL-SIZED DIRECT-CURRENT MOTOR AND ITS MANUFACTURE

PROBLEM TO BE SOLVED: To make it possible to manufacture a small-sized motor with stabilized quality without use of any special magnifying apparatus such as a microsope, by opening the bearing metal mounting portion of a bracket toward the outside of a motor, and making the inside diameter of a through hole larger than the outside diameter of the sliding portion of a commutator. SOLUTION: A small-sized direct-current motor is constituted of a bracket subassembly A, a rotor assembly B and a case C. The metal mounting portion 14 of the bracket subassembly A is opened outward so that a bearing metal 3 can be installed from outside the motor, and further the inside diameter of a through hole is made larger than the outside diameter of the sliding portion of a commutator 5. As a result, a bearing metal 3 can be fit onto a rotor shaft 7 from outside the motor in an assembling process, and a brush 2 can be positioned on the sliding portion of the commutator 5 without deformation. Thus, the constitution is well suited for automatized production.