| 摘要 |
PURPOSE:To provide easy magnetic fitting, strong attraction and leakage prevention, by a method wherein a gap between a magnetic pole and a ferromagnetic member to be attracted by the pole is reduced to the utmost, a closed circuit for the magnetic flux is formed, and the flux density is made maximum. CONSTITUTION:An attractive surface of a magnetic lever 5 is made hemispherical shape, and a magnetic lever 8 is attracted in abutment with the magnetic lever 5. The abutting end surfaces in the magnetic lever 8 and a ferromagnetic plate 2B are curved in conformity with the hemispherical shape of the magnetic lever 5. A gap is provided between a leg 7 and the plate 2B, if necessary, so as to constitute play for a base 6 and a plate 9 at the inclination state. |
