Abstract: A miniature motor in which stators are mounted in an interior of a casing, and a preassembled commutator is provided on a rotor rotatably disposed to face the stators. The commutator has a sleeve body having a cylindrical portion provided with a flanged portion and a plurality of recesses, directed outwardly, in a side wall of the flanged portion, with the sleeve body being made of insulating material and mounted on a rotary shaft of the rotor. The commutator also has a plurality of conductive commutator pieces each having a body portion formed in an arcuate shape and mounted on an outer circumferential surface of the cylindrical portion, a terminal portion and at least one retainer portion, with each of the terminal portion and the retainer portion being received in the recesses.

Abstract: A method for winding coils on an armature for miniature motor which typically comprise an armature iron core of a multi-pole construction, having a plurality of coils wound thereon, a commutator disposed on an insulating cylinder fixedly fitted to a motor shaft, and ends of lead wires drawn from the coil connected to commutator tongues of the commutator, in which a plurality of coils are wound sequentially on the armature iron core, and the trailing end of the lead wire drawn from the lastly wound coil is connected to a predetermined commutator tongue after the lead wire is wound on the insulating cylinder at a predetermined angle in such a manner that the lead wire intersects and makes contact with all the lead wires lying between the already wound coils and the commutator tongues at least more than once.