| 摘要 |
PURPOSE:To increase the length of a linear motion by providing a coil in the magnetic field on an air gap in a magnetic circuit which is composed of a permanent magnet and forming a slide one of the coil of magnetic circuit side. CONSTITUTION:When a current flows through a longitudinal coil unit at the left side of a coil 1 in the magnetic field of an air gap (a), the coil 1 receives a force of rightward direction, permanent magnets 4, 5 receive the force of reverse direction by the reaction, a slide 10 which is integral with the permanent magnets 4, 5 is slided leftwardly, i.e., an operating shaft 11 slides in its projecting direction. Even if the left side longitudinal coil unit of the coil 1 is displaced from the magnetic field which is produced in the air gap (a) between the permanent magnets 4 and 5, the slide 10 continuously slides as long as the right side longitudinal coil unit of the coil 1 exists in the magnetic field of the air gap (b) between permanent magnets 6 and 7. In this manner, the sliding distance becomes a length added with the lengths of the permanent mangets 4, 5 and 6, 7, thereby increasing the length of the linear motion. |
