| 摘要 |
PROBLEM TO BE SOLVED: To provide a rotation knob capable of being installed by proper insertion force, pulling out force even for dispersion in shapes, dimensions of shafts, size of holes and shapes of the rotation knobs. SOLUTION: In this rotation knob to be inserted into the shaft to be rotated and with a D-shaped cross section of the insertion hole of a shaft insertion part, the shaft insertion part is provided with a fixed part and a deformed part, the fixed part is fixed to the rotation knob by a rib, the deformed part is divided into two and is provided with a rib with flexibility in a direction in which the insertion hole is extended by inserting the shaft.
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