| 摘要 |
PURPOSE:To execute easily and exactly a cancelling of a title 'SOROBAN' (abacus) by forming a structure of a bar and its support by a specified constitution, and utilizing a magnetizing force of a permanent magnet. CONSTITUTION:A crank type bar 14 having an arm 12 and a shaft 13 is formed by bending both ends of an iron wire 11 whose length is almost the same as a 'SOROBAN' (abacus), and it is positioned between one side (a) and the fifth counter ball 21 of a beam 20, and between the other side (b) and the first count er ball 22, respectively, and the shaft 13 is installed axially to an outside frame 23 of both sides. Also, a swing body 15 is screwed 6 to the beam 20 so as to become a state that it is pinched by the crank type bar 14, and a magnet 24 is embedded into the beam 20. In this regard, an operating layer 17 provided with a button 16 is installed spirally to the swing body 15. In this state, when the swing body 15 is rotated by pushing the button 16, and crank type bar 14 is separated from the beam 20, all of the fifth and the first balls are can celled. Also, when a finger is set free from the button 16, the crank type bar 14 descends by its empty weight and magnetized by the magnet 24 of the beam 20, and a perfect cancelled state is obtained.
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