Patent ID: 6717306
Filing Date: 2004-04-06
Classification: H02K

Abstract:
A coreless motor comprising:an external housing with a central axis, a closed end, and a through hole located at a center of the closed end, a rotating shaft that penetrates the external housing and is located on the central axis of the external housing, a magnet that is fitted and fixed to an outer periphery of the bearing housing, a cylindrical coil that accommodates the magnet within a diameter of the cylindrical coil and is separated from the magnet by a magnetic gap, a coil holder that supports the coil on a coaxial position of the rotating shaft, a commutator mechanism with a coil side and a magnet side wherein the coil side is supported on the coaxial position of the rotating shaft as a rotor and the magnet side is fitted and fixed to the outer periphery of the bearing housing as a stator, and a molded resin body comprising a bearing that supports the rotating shaft so that the shaft is free to turn within the external housing, and a bearing housing that is fitted to the rotating shaft and located along the central axis, wherein said molded resin body is molded in place through the through hole in the external housing, is molded as a single continuous piece that forms said bearing and said bearing housing, and is a base upon which both the stator and the rotor are assembled.