| CPC G07C 9/00944 (2013.01) | 5 Claims |

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1. A knob holding structure comprising:
a holder;
a pair of pinching members configured to hold a knob and arranged opposed to each other in the holder; and
an elastic member configured to support the pair of pinching members so that each pinching member can be displaced relative to an inner surface of the holder, and to bias the pinching members in a direction so as to approach each other.
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