Patent ID: 7859149

Claim:
An electric motor in which an armature provided with an armature shaft is rotatably accommodated in the inside of a motor case, comprising: a power supply device that is equipped in the motor case in the axial direction of the armature shaft and supplies a driving current to the armature; a rotation detector that is accommodated in the motor case together with the power supply device and detects rotation of the armature shaft; and a connector unit that is integrally formed with the power supply device, connected to a connector on the side of a control device, and connects the power supply device and the rotation detector to the control device, wherein the power supply device is equipped to the motor case after the rotation detector is attached to the power supply device in advance, wherein the armature includes a commutator fixed to the armature shaft and the power supply device includes a pair of brushes which slidably contact with the outer circumferential surface of the commutator, wherein the power supply device includes a holder that is fixed to the motor case and holds the brushes, wherein an attachment unit which has a locking piece including a claw portion is integrally formed with the holder and is disposed offset from the brushes in the axial direction of the armature shaft, and wherein the rotation detector is attached to the attachment unit by the engagement with the claw portion thereby the positioning of the rotation detector is set in the axial direction of the armature shaft.