| 摘要 |
PURPOSE: A stepping motor and a manufacturing method therefor are provided to miniaturize the stepping motor and to increase a productivity, durability, reliability, and performance by providing the stepping motor capable of omitting a bearing fixing portion. CONSTITUTION: A stepping motor(1) includes a rotary shaft(10), a rotor magnet(15), a bearing portion(11,17), and a yoke(13,16,18,20). The rotor magnet is fixed and mounted on the rotary shaft. The bearing portion includes a small-diameter portion and a larger-diameter portion. The bearing portion supports the rotary shaft. The yoke includes a plurality of magnetic pole teeth and a bottom plate. The plurality of magnetic pole teeth surround an outer circumferential surface of the rotary magnet. The bottom plate includes an opening into which the small-diameter portion is inserted. The small-diameter portion of the bearing portion is fitted in the opening of the bottom plate and is clamped radially outward.
|
