Patent ID: 8398073

Claim:
An automatic document feeder for feeding a sheet, said automatic document feeder comprising: a sheet pick-up module comprising a driving shaft and a sheet pick-up arm, wherein said driving shaft is installed on said automatic document feeder, said sheet pick-up arm is pivotally coupled to said driving shaft, and comprises a sheet pick-up roller and a sheet separation roller, wherein when said sheet pick-up arm is in a sheet feeding position, said sheet is fed into an internal portion of the automatic document feeder through a feeding entrance by said sheet pick-up roller; and a floating shock-absorbing structure disposed at said feeding entrance and at least a portion of said floating shock-absorbing structure is moveable relative to said feeding entrance, wherein when said sheet pick-up module is rotated to said sheet feeding position, said sheet pick-up roller contacts said floating shock-absorbing structure to feed said sheet into said internal portion of said automatic document feeder, wherein said floating shock-absorbing structure comprises a recess and a friction-enhancing pad, wherein said friction-enhancing pad covers at least a portion of said recess, said friction-enhancing pad comprising: a fixing area which secures said friction pad to said feeding entrance outside of said recess; and a floating area covers at least a portion of said recess, wherein said floating area is swung with respect to said fixing area when said floating area is pressed by said sheet pick-up roller, wherein a bottom portion of said pick-up roller contacts a top surface of said floating area when there are no sheets in said automatic document feeder and when said pick-up roller is in said sheet feeding position.