Patent ID: 7621522

Claim:
A sheet feeding device comprising: a roller configured to be brought in contact with a print medium and rotate to apply a transport force to the print medium in order to transport the print medium in a transport direction; a driving unit configured to generate a driving force to rotate the roller; a flap configured to swing between a first standby position and a first feeding position, the flap coming into contact with an edge of the print medium at the first standby position not to allow transport of the print medium and allowing the transport at the first feeding position; a guide configured to swing between a second standby position and a second feeding position, the guide coming into contact with the print medium at the second standby position to separate the print medium from the roller and allowing the print medium to be in contact with the roller at the second feeding position; a guide-swinging member configured to swing the guide using the driving force generated by the driving unit; and a locking member configured to bring the flap at the first standby position into contact with the guide at the second standby position to prevent the flap from swinging to the first feeding; wherein the guide-swinging member includes: a swinging mechanism configured to drive the driving unit in a second direction opposite to a first direction, in which the driving unit is driven to transport the print medium, to move the guide from the second feeding position to the second standby position; a guide biasing unit that biases the guide in a direction in which the guide swings to the feeding position; and a releasing unit configured to release a connection between the driving unit and the swinging mechanism at least when the driving unit is driven in the first direction.