| 摘要 |
PURPOSE:To reduce unwanted leakage magnetic field and realize reduction in size of magnet by cutting the upper and lower pole piece magnets like a through groove from the surface in the opposite side of the center gap to the magnetizing direction of said magnets. CONSTITUTION:A large groove is provided in the direction at a right angle to the center axis of magnetizing direction of magnet so that the surface not bonded to magnets in the upper pole piece 1 and lower pole piece 2 is almost removed. With such a structure, various kinds of leakage magnetic fields can be fantastically reduced and a magnet can be reduced in size. |
