Automatic document feeder

摘要

An automatic document feeder includes an upper cover, a pick-up arm, a restriction element, and a document stopper. The pick-up arm is movable between a first position and a second position. A rotating shaft of the restriction element is pivotally coupled to the pick-up arm. A rotating shaft of the document stopper is pivotally coupled to the upper cover. Moreover, the rotating shaft of the restriction element and the rotating shaft of the document stopper are not in parallel with each other. When the pick-up arm is located at the first position, a swinging action of the document stopper is limited by the restriction element. When the pick-up arm is located at the second position, the swinging action of the document stopper is no longer limited by the restriction element, so that the document stopper can be freely swung.

主权项

1. An automatic document feeder, comprising:
an upper cover; a transfer channel; a pick-up arm located near an entrance of said transfer channel, and reciprocally movable between a first position and a second position; a restriction element comprising a first rotating shaft, wherein said first rotating shaft is pivotally coupled to said pick-up arm; and a document stopper comprising a second rotating shaft, wherein said second rotating shaft is pivotally coupled to said upper cover, and said second rotating shaft is not in parallel with said first rotating shaft, wherein when said pick-up arm is located at said first position, said restriction element is contacted with said document stopper, so that a swinging action of said document stopper is limited by said restriction element, wherein when said pick-up arm is located at said second position, said restriction element is separated from said document stopper, so that said document stopper is permitted to be freely swung.