| 摘要 |
PURPOSE:To realize rotation and vertical motion through one apparatus by making a rotating table move in an axial direction at the same time that a motor revolves. CONSTITUTION:A motor is composed of coils 3-1, 3-2, a yoke 4 having pole teeth with the number of poles equal to that of steps per rotation, a rotor 2 with a surface provided with a permanent magnet having alternately magnetized S and N poles in the manner of corresponding to said number of poles, and other parts. A part 4' of the top surface of said yoke 4 is separated and fixed to a hub 9. The hub 9 can move up and down in the axial direction of a rotating shaft 1 but is prevented from rotation by a guide 11. A rotating table 7 revolving together with said rotating shaft and capable of moving up and down in the axial direction of said shaft is inserted in the rotating shaft 1. The rotating table 7 and the hub ascend by a spring 10, when the coils are not excited, and are pressed against and fixed to an outer case 6 via non-slip rubber 12. If said coils are excited, the yokes 4 and 4' attract each other, and the hub 9 and the rotating table 7 move down.
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