| 摘要 |
PURPOSE:To enable a shifting unit to be driven rectilineally and electrically in succession, by a method wherein two coils are arranged in series in the circumference of a rod-like shifting unit magnetized with poles N, S at the both ends, and wherein a magnetic field changing in succession is generated on the both coils in the same direction. CONSTITUTION:A rod-like shifting unit 10 magnetized with poles N, S at the both ends is inserted into a circular cylindrical unit 11, to slide freely. In the circumference of the circular cylindrical unit 11, two coils 12, 13 are arranged in series so that a magnetic field along the axial direction of the shifting unit 10 may be generated. And driving gears 21, 23 for driven current control are connected to each coil 12, 13, and magnetic fields generated on the both coils 12, 13 are arranged in the same direction to control electric current so that the ratio of the magnetic field scales may be changed in succession. As the result, as the center of the magnetic field generated on the both coils is shifted in succession, the center P1 of the shifting unit 10 is shifted, thereby rectilinear motions in succession can be obtained. |
