| 摘要 |
PROBLEM TO BE SOLVED: To provide a rotary display which is capable of stably maintaining a stop position of the rotary display when not excited by varying the magnetic attraction structure during the non-excitation of a permanent magnet and electromagnet iron core. SOLUTION: When the rotary display is constituted by mounting the permanent magnet at the freely rotatably supported rotary display and turning the rotary display integral with permanent magnet by exciting the permanent magnet by the iron core of the electromagnet, the rotary display is provided with the permanent magnet of a branch shape help with the polarities of the same magnetic poles respectively in both side positions with respect to a center of the rotation and the branched iron cores of the electromagnet are respectively disposed in correspondence in the positions facing branched both side ends of the permanent magnet, by which the magnitude of the magnetic attraction force during the non-excitation acting between the one side opposite parts where the iron cores of the electromagnet and the permanent magnet face each other and between the outer side opposite parts is varied.
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