| 摘要 |
PURPOSE: A flat rotating device is provided to widen a combination area between a support plate and a tooth core by compressing the lower outer side of a tooth core in a compression hole formed from the outer side to the center of the support plate. CONSTITUTION: A compression hole(121a) is formed from the outer side to the center of a support plate(121). One end of the compression hole is connected to the outer side of the support plate. An outer side of a tooth core(123) is compressed and fixed to the compression hole. A pair of first hanging rails(123a) are formed on the outer side of a tooth core to face each other. The first hanging rail is hanged on one side of the support plate.
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