| 发明名称 |
Step motor |
| 摘要 |
A step motor comprising a stator made by bending a bar-shaped and magnetically highly permeable material into a substantially U-shape which is straight in one leg and curved in the other leg so that the magnetic flux distribution accompanying the curved leg will have a single ridge and the nearest and second nearest distances g1 and g2 of the curved leg from a rotor and the distance g3 between the straight leg and the rotor will maintain such relations as 1.2</=g2/g1</=1.8 and 2.1</=g3/g1</=3.5, the stator being secured to a main plate as inserted at the curved leg partly into a groove made in the main plate. A part of the curved leg defining the distance g1 is made to be a tip end part of the curved leg, the width at a part of the groove in which the tip end part of the curved leg is inserted to be secured to the main plate is made to be of the stator width and the groove width at other parts is made comparatively larger than the stator width. A bearing for the rotor shaft is formed integrally with the main plate to easily reliably achieve the distance relations. A quartz clock using the step motor is provided by arranging a gear train on the same main plate of the step motor.
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| 申请公布号 |
US4415274(A) |
申请公布日期 |
1983.11.15 |
| 申请号 |
US19810297621 |
申请日期 |
1981.08.31 |
| 申请人 |
MATSUSHITA ELECTRIC WORKS, LTD. |
发明人 |
MATSUMOTO, AKIO;INAZUMI, KOICHI;ARAKI, KAZUHIRO |
| 分类号 |
G04C3/14;G04C13/11;H02K37/16;(IPC1-7):G04F5/00 |
主分类号 |
G04C3/14 |
| 代理机构 |
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代理人 |
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| 主权项 |
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| 地址 |
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