Patent ID: 7530563

Claim:
A paper-feeding mechanism of an automatic document feeder, said paper-feeding mechanism being coupled with a casing of said automatic document feeder for successively feeding a stack of paper sheets on a paper input tray, said paper-feeding mechanism comprising: a pick-up module disposed in the vicinity of said paper input tray for picking an uppermost paper sheet from said stack of paper sheets and transporting said uppermost paper sheet into a passageway inside said automatic document feeder; a supporting module for supporting said pick-up module and rotated to either ascend or descend said pick-up module, wherein said supporting module has a sustaining part on a sidewall thereof; and a paper stopping module coupled to said casing and including a stopping plate and a transmission member, a first end of said transmission member being in contact with said sustaining part, a second end of said transmission member being coupled with said stopping plate, wherein said stopping plate is moved to a paper-feeding position for allowing said uppermost paper sheet to be transported into said passageway when said supporting module and said pick-up module are downwardly rotated, and said stopping plate is moved to a paper-stopping position for hindering said uppermost paper sheet from being transported into said passageway when said supporting module and said pick-up module are upwardly rotated.