Patent ID: 8096717

Claim:
A feed drive device for a printer, comprising: a feed roller that feeds a print medium in synchronization with drive of a print head; a motor constituting a driving source of the feed roller; a roller reduction gear train that transmits power from the motor to the feed roller; a reverse rotation preventing mechanism that is incorporated on an input gear of the roller reduction gear train and prevents reverse rotation of the feed roller; a cutter reduction gear train that transmits power from the motor to a cutter; and a clutch device that transmits forward rotational power of the motor to one of the roller reduction gear train and the cutter reduction gear train and transmits reverse rotational power to the other; the reverse rotation preventing mechanism being operated by reverse rotational power of the feed roller reversely input to the roller reduction gear train to prevent reverse rotation of a first gear disposed on the input gear of the roller reduction gear train, and the reverse rotation preventing mechanism prevents reverse rotation of the feed roller with the clutch device switched to the cutter reduction pear train.