Power transmission structure of media separation unit

A power transmission structure of a media separation unit, the power transmission structure comprising:

• a pickup pulley and a feed pulley that are spaced apart;
• a media separation belt configured to travel along the pickup pulley and the feed pulley, grip and convey media, and have a slope that changes due to contact with a bill press configured to support the media and move upward or downward at a lower side of the pickup pulley;
• a motor configured to provide a driving force for the media separation belt to rotate in a first direction or a second direction opposite to the first direction;
• at least one relay gear configured to transmit the driving force of the motor;
• a swing arm configured to swing in a first rotational direction and a second rotational direction within a predetermined angle range in conjunction with rotation of the at least one relay gear;
• a swing gear configured to be connected to the swing arm and rotate in conjunction with the rotation of the at least one relay gear to transmit power for the swing arm to swing;
• and
• a clutch gear configured to intermittently be coupled to or released from the swing gear according to a swing direction of the swing arm and configured to transmit power to the pickup pulley through a connection belt, wherein a slope of the connection belt changes in conjunction with a change in a slope of the media separation belt.