Patent ID: 8154161
Filing Date: 2012-04-10
Classification: H02K

Abstract:
1. A miniature motor comprising: a substrate including a pivotal portion; a circuit board mounted to the substrate and including a coil unit and a detection element; a rotor including a hub and a permanent magnet, with the rotor rotatably mounted to the pivotal portion of the substrate, with the permanent magnet mounted to the hub and aligned with the coil unit and the detection element, with the permanent magnet including a plurality of north poles and a plurality of south poles, with each of the plurality of north and south poles including a stronger magnetism section, with a weaker magnetism section formed between two adjacent stronger magnetism sections; and at least one magnetically attractive auxiliary starting member mounted between the substrate and the rotor and aligned with the permanent magnet, with the circuit board located intermediate the substrate and the rotor, with said at least one auxiliary starting member engaged between the circuit board and the substrate, with the circuit board located intermediate the rotor and the auxiliary starting member and separating the auxiliary starting member from the rotor, wherein, when the rotor stops rotating, said at least one auxiliary starting member aligns with and is magnetically attracted by at least one of the stronger magnetism sections of the permanent magnet, locating the detection element in a position not aligned with the weaker magnetism sections along an axis of the hub.