Patent ID: 6674202
Filing Date: 2004-01-06
Classification: H02K

Abstract:
An eccentric commutator including:a commutator base member comprising a printed wiring plate having first and second surfaces, a center, a through hole at the center, and a plurality of commutator elements on the first surface; a bearing holder portion made of resin, integral with the second surface of the commutator base member at the through hole, and having a perforated shaft receiving portion; at least two air-core armature coils disposed at respective areas eccentrically located outside of the center of the commutator base member in a radial direction, each air-core armature coil having first and second ends; a resin member integral with and extending from the bearing holder portion and passing between the air-core armature coils, wherein the resin member comprises a resin and a metal, and the resin member has a specific gravity of at least 3; and air-core armature coil connection terminal portions, located on the second surface and outside of the air-core armature coils so that the connection terminal portions do not overlap with the air-core armature coils when viewed in plan, and respectively connected to the first and second ends of each air-core armature coil.