Recording apparatus and one-way compound gear mechanism

A recording apparatus comprising:

• a feeding roller which feeds a recording medium in a downstream direction of a feeding passage by rotating forwardly;
• and
• a power transmission mechanism for transmitting a driving force from a driving source to the feeding roller,
• wherein the power transmission mechanism includes
• a one-way compound gear mechanism that integrally includes a first one-way gear mechanism which is engaged with a first gear rotating forwardly or reversely by receiving the driving force from the driving source, rotates together with the first gear in a forward direction by receiving the driving force from the first gear at the time of the forward rotation and rotates idly with respect to the first gear at the time of the reverse rotation, and a second one-way gear mechanism which is engaged with the first gear, rotates idly with respect to the first gear at the time of the forward rotation and rotates together with the first gear in a reverse direction by receiving the driving force from the first gear at the time of the reverse rotation;
• a first power transmission passage which is a power transmission passage between the first one-way gear mechanism and the feeding roller, causes the feeding roller to rotate forwardly by receiving the driving force from the first one-way gear mechanism at the time of the forward rotation of the first gear and causes the first one-way gear mechanism to idly rotate by receiving the driving force from the feeding roller at the time of the reverse rotation of the first gear;
• and
• a second power transmission passage which is a power transmission passage between the second one-way gear mechanism and the feeding roller, causes the feeding roller to rotate forwardly by receiving the driving force from the second one-way gear mechanism at the time of the reverse rotation of the first gear and causes the second one-way gear mechanism to idly rotate by receiving the driving force from the feeding roller at the time the forward rotation of the first gear, and
• wherein the one-way compound gear mechanism includes a second gear that is disposed coaxially with the first gear, transmits the driving force to the first power transmission passage and constitutes the first one-way gear mechanism, a third gear that is disposed coaxially with the first gear, transmits the driving force to the second power transmission passage and constitutes the second one-way gear mechanism, and a resistance applying unit which applies a rotational resistance to both the gears.