Detachable feed roller for using in the automatic feeder

A detachable feed roller for using in an automatic feeder includes:

• a rotating shaft that includes a first connection structure arranged at an end of the rotating shaft;
• a fixed feed roller which is arranged around the rotating shaft and directly driven by the rotating shaft;
• a one-way feed roller arranged around the rotating shaft;
• a transmitting rotor arranged around the rotating shaft, the transmitting rotor being disposed between the one-way feed roller and the rotating shaft;
• a first motion direction changing unit that includes an actuating part arranged around the rotating shaft and an actuating surface arranged on the transmitting rotor, the first motion direction changing unit pushing the transmitting rotor toward the one-way feed roller while the rotating shaft rotates forward relative to the transmitting rotor;
• a second motion direction changing unit that includes a cam part arranged around the one-way feed roller and a cam surface arranged on the transmitting rotor, the second motion direction changing unit pushing the transmitting rotor away from the one-way feed roller while the one-way feed roller rotates forward relative to the transmitting rotor, a pushing distance of the first motion direction changing unit being longer than a pushing distance of the second motion direction changing unit;
• wherein the automatic feeder comprises:
• a two-way motor that is selectively to rotate forward and backward;
• a transmission unit connected with the two-way motor for transmitting the driving force;
• a one-way clutch connected with the transmission unit for transmitting the driving force forward;
• and
• a second connection structure connected with the one-way clutch, the second connection structure being arranged to cooperate with the first connection structure, the detachable feed roller being connected with the one-way clutch with the cooperation of the first connection structure and the second connection structure.