Patent ID: 7193340

Claim:
A low-profile stepping motor comprising: (a) a stator assembly comprising first and second stator units, wherein each of said first and second stator units is constructed such that upper and lower stator yokes are coupled to each other with their respective pole teeth shifted from each other by an electrical angle of 180 degrees, said upper and lower stator yoke each having a plurality of pole teeth formed along one side thereof and bent toward each other and an exciting coil arranged at the other side thereof opposite to said one side where the pole teeth are formed, the first and second stator units having their respective ends, the respective ends being connected to each other with spacers of a non-magnetic material interposed in-between such that their respective pole teeth positioned and adjacent to each other are shifted from each other by an electrical angle of either 90 or 270 degrees; and (b) a rotor assembly including a hollow-cylindrical magnet, and rotatably disposed centrally inside the stator assembly such that the magnet faces the pole teeth of the stator yokes with a small air gap in-between.