Feed drive device for printer and printer

摘要

Provided herein is a feed drive device for a printer including: 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; and a reverse rotation preventing mechanism that is incorporated in an input side of the roller reduction gear train and prevents reverse rotation of the feed roller; 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 in an input side of the roller reduction gear train.