| 摘要 |
<p>PURPOSE: To substantially improve a force action acting on respective movable element parts, without enlarging the volume of the entire magnet by providing an extension part or a formed part extended along the axis of a magnet core to a pole or a pole surface and forming a generally U-shaped notches on the end face sides of the magnet core. CONSTITUTION: A pole or a pole surface 6 is provided with the extension part or a formed part 5, extended along the axis X of a magnet core 1. Then, generally U-shaped notches 7 are formed on the end face sides of the magnet core 1. Thus, this holding magnet provided with the two kinds of T-shaped feeble- magnetic magnet cores is improved, and the attracting force acting on the movable element parts of knife-shape, arranged at intervals is improved, without enlarging the structure volume of a magnet system.</p> |
