| 摘要 |
PROBLEM TO BE SOLVED: To provide a driving force switching mechanism capable of performing switching of a driving force by a configuration which is simple and in which required component accuracy is relaxed.SOLUTION: A driving force switching mechanism, which can switch normal/reverse of a rotation direction of a one-direction rotational driving force input from a driving source and output it, includes: a planetary gear mechanism in which one gear out of an inner tooth gear 15b and a sun gear 16a rotates in a first direction by the rotational driving force, and the other gear rotates in the first direction or a second direction via a planetary gear 14; a carrier 13 which supports the planetary gear 14 in a rotatable manner, and which can take a rotation state of rotating in the first direction by the rotational driving force, and a stop state in which the rotation is restricted; an actuator 12 for switching transmission/blocking of the rotational driving force to the carrier 13; and rotational load adding means 19 for adding a certain rotational load with respect to the carrier 13 so that the rotation of the carrier 13 is restricted in a block state of the rotational driving force. |
