Patent ID: 8646904

Claim:
A sheet feeding device, comprising: a sheet cassette configured to accommodate sheets; a conveyance path through which each of the sheets accommodated in the sheet cassette is conveyed; a rotation roller provided at one of a start point and a vicinity thereof in the conveyance path; a motor configured to rotatably drive the rotation roller; a pressure body configured to come into pressing contact with the rotation roller via the sheet; and a moving mechanism configured to separate the rotation roller and the pressure body, which are in pressing contact with each other, away from each other when driving of the motor stops and configured to bring the rotation roller and the pressure body, which are away from each other, into pressing contact with each other when driving of the motor is initiated, wherein the moving mechanism includes: a first holder configured to support the pressure body; and a first actuator configured to move the first holder so as to bring a portion of the first holder, at which the pressure body is supported, close to the rotation roller when the motor is driven and to move the first holder so as to separate the portion of the first holder, at which the pressure body is supported, away from the rotation roller when the motor stops driving, wherein the first actuator includes: a first arm configured to act on the first holder so as to move the first holder; a first cam configured to act on the first arm; and a first force-transmitting portion configured to transmit a force from the motor to the first cam, and wherein the first force transmitting portion includes: a ring gear having internal teeth and external teeth which are directly or indirectly in mesh with a gear fitted on an output shaft of the motor; and a gear which is directly or indirectly provided on the first cam so as to be in mesh with the internal teeth of the ring gear.