| 摘要 |
PURPOSE:To enable change in the rotational direction by external operation with a shift slit so formed that a moving piece shaped in a sector is inserted into a shift hole provided on an upper or lower stator with an angle smaller than that of the shift hole. CONSTITUTION:Sector-shaped shift holes 24 and 25 with a fixed angle are provided either or both of upper stators 22a and 23a and lower stators 22b and 23b at such a position that they are turned by almost 90 deg. from driving slits a1 and a2 or the like ona rotor shaft 21. Moving pieces 26 and 27 made of the same material as the stator are inserted into the shift holes 24 and 25 with a slightly smaller angle than the holes and then, a rotary member 28 is provided adjacent to the stator to fix the pieces 26 and 27. When the rotary member 28 is turned with an external operation member 33, shift slits 35 and 36 are formed clockwise or counterclockwise in the shift hole. |
