Driving force transmitting apparatus, sheet conveyance apparatus, and image forming apparatus

A driving force transmitting apparatus comprising:

• a first planetary gear unit including a first locked gear provided with a plurality of first locked portions, and including a first mesh gear;
• a second planetary gear unit including a second locked gear provided with a plurality of second locked portions, and including a second mesh gear configured to mesh with the first mesh gear;
• a rotation switching member including a first locking portion and a second locking portion, wherein the rotation switching member is capable of moving to (i) a first stop position at which the first locking portion locks one of the plurality of first locked portions to stop the first locked gear, and (ii) a second stop position at which the second locking portion locks one of the plurality of second locked portions to stop the second locked gear;
• and
• an urging member configured to urge the rotation switching member to the second stop position,
• wherein an interval between the plurality of second locked portions in a rotational direction of the second locked gear is larger than an interval between the plurality of first locked portions in a rotational direction of the first locked gear.