| 摘要 |
A solenoid is provided with a reduced overall length, while providing the same force characteristics as the force characteristics of conventional solenoids or higher. The solenoid includes a fixed portion and a movable portion. Furthermore, the end of the movable portion includes a magnetic pole portion having at least two tapered faces. Moreover, the end of the fixed portion includes a magnetic pole portion having at least two tapered faces opposing the magnetic pole portion of the movable portion. Such a solenoid provides the force characteristics of the flat-type solenoid in a region where the gap is small, while maintaining the force characteristics of the cone-type solenoid in a region where the gap is large.
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