Patent ID: 6201324
Filing Date: 2001-03-13
Classification: H02K,Y10T

Abstract:
A claw pole stepping motor, comprising:a stator forming a magnetic circuit, the stator including:an inner yoke;an outer yoke, the inner and outer yokes having a soft magnetic steel plate;a bobbin including a polymeric material and arranged between the inner yoke and the outer yoke with a coil being wound around the bobbin;guide slots formed on an inner surface of the bobbin; andpositioning guide portions and stoppers formed on respective first ends of each of the guide slots;a rotor disposed inside the stator for rotation; anda plurality of pole teeth, which are discrete and separate from both of the yokes and held at an inner circumference of the bobbin by the guide slots, the stoppers being resilient and causing respective lengths of the guide slots to be longitudinally shorter than lengths of the respective pole teeth for creating a stable contact between the pole teeth and both of the yokes.