| 摘要 |
PURPOSE:To make possible an armature to be prevented from a wrong operation by connecting a core of an electric magnet and a parmanent magnet directly. CONSTITUTION:A plurality of core 10 of the electromagnets for driving an armature 9 are provided on a parmanent magnet 2, and each core 10 is formed in a shape of a column, and being winded on a coil 11. An electric current is flowed in the selected coil 11 and excites it and a magnetic flux is generated in a core 10 of the adjacent coil 11. A magnetic circuit of a loop of the magnetic flux 13 contains only one parmanent magnet 2, on the other hand, the magnetic circuit of the loop of the magnetic flux 14 contains two parmanent magnet 2, 2' and further contains the air between the armatures 9, 9' adjacent thereto. Therefore, a current necessary for release the armature 9 adjacent thereto by an operation of the magnetic flux 14 is not varied almost with the current of the individual releasing time and a wrong operation of the armature 9 can be prevented, since a magnetic resistance of the loop of the magnetic flux 14 becomes extremely large value compared to that of the loop of the magnetic flux 13, and the value of the magnetic flux 14 becomes extremely small. |
