| 摘要 |
PURPOSE:To prevent a fixation bushing for an elastic magnet from dropping off and a part around a through hole from cracking, by providing a plurality of projections on the peripheral surface of the fixation bushing or on the inside surface of the magnet around its through hole so that the projections extend in the axial direction. CONSTITUTION:A through hole 8, in which a screw 6 is fitted, is provided in the mounting part 7 of a stator and another through hole 11, in which a cylindrical fixation bushing 10 is fitted, is provided in the mounting part 9 of the elastic magnet 3 in order to secure the magnet at a prescribed distance. A plurality of projections 14 are manufactured on the peripheral surface of the fixation bushing 10 by knurling, drawing or the like so that the projections extend at prescribed intervals in the axial direction. This results in preventing the fixation bushing from dropping off and a crack from taking place around the through hole of the elastic magnet. |
