Patent ID: 8368254
Filing Date: 2013-02-05
Classification: H02K

Abstract:
1. A linear motor provided with a magnetic body and an armature, the linear motor being adapted to produce a force causing the magnetic body and the armature to be relatively displaced along a given linear moving direction by interaction of magnetic fluxes generated between the magnetic body and the armature during an operation of supplying electric power to the armature, comprising: a base plate having a thin tray-shape, said base plate being adapted to set the moving direction on a base surface thereof; a movable section attached to the base plate in a relatively movable manner reciprocating along the moving direction with respect to the base plate; a mover disposed on a lateral surface of the movable section with respect to one side of a widthwise direction of the base surface, said widthwise direction is perpendicular to the moving direction and to a frontward-rearward direction that is perpendicular to the base surface, the mover formed as one of the magnetic body and the armature; a stator provided on the base surface of the base plate to be disposed opposed to the mover from one edge side toward another edge side in the widthwise direction to downsize the linear motor in the frontward-rearward direction to allow the linear motor to have a thin structure, the stator formed as the other of the magnetic body and the armature to extend along the moving direction; at least a sub-tooth provided on the base surface of the base plate, said sub-tooth is adapted to reduce the cogging-force which occurs during the operation; and a magnetic plate provided between the base plate and said sub-tooth so that the magnetic plate supplements the cogging-force reducing effect by said sub-tooth.