Patent ID: 8496240

Claim:
An automatic document feeder for feeding at least one document, said automatic document feeder comprising: an upper cover having a first hooking element, wherein said first hooking element is disposed on an inner surface of said upper cover; a conveying channel for allowing said at least one document to go through, wherein said conveying channel is disposed under said upper cover, and said conveying channel has a channel entrance; and a document pick-up module arranged between said upper cover and said channel entrance, wherein when said automatic document feeder is operated in a document-feeding mode, said at least one document is transported into said conveying channel by said document pick-up module, wherein said document pick-up module comprises: a casing having a protrusion portion, which is disposed on an outer wall of said casing; and a second hooking element disposed on said casing and exposed to said outer wall, wherein said second hooking element is rotatable relative to said casing, and engaged with said first hooking element when said automatic document feeder is operated in a standby mode, wherein said casing further comprises a hollow portion, wherein said hollow portion runs through said outer wall of said casing and an inner wall of said casing for accommodating said second hooking element, wherein said protrusion portion is integrally formed with said casing, wherein when said automatic document feeder is operated in said standby mode, said casing is swung to a position near said upper cover and said second hooking element is engaged with said first hooking element, so that said casing is fixed on said upper cover, wherein when said automatic document feeder is operated in said document-feeding mode, said second hooking element is disengaged from said first hooking element and said casing is swung to a position near said channel entrance, so that said document pick-up module is contacted with said at least one document for transporting said at least one document into said conveying channel.