Automatic document feeder with sheet pick-up module

An automatic document feeder for feeding a sheet, said automatic document feeder comprising:

• a top cover having a fixing structure and a first attracting element disposed on an inner surface thereof, wherein said first attracting element is installed on said fixing structure such that a floating gap is formed between said first attracting element and said fixing structure;
• a sheet pick-up module arranged under said inner surface of said top cover, and comprising a driving shaft and a sheet pick-up arm, wherein said driving shaft is installed on a main body of said automatic document feeder, said sheet pick-up arm is pivotally coupled to said driving shaft, and said sheet pick-up arm is rotatable to either a standby position or a sheet feeding position, wherein said sheet pick-up module feeds said sheet into an internal portion of the automatic document feeder when said sheet pick-up arm is rotated to said sheet feeding position;
• and
• a second attracting element disposed on said sheet pick-up arm, wherein said first attracting element and said second attracting element are attracted by each other when said sheet pick-up arm is rotated to said standby position, so that said sheet pick-up arm is fixed on said standby position, wherein one of said first attracting element and said second attracting element is a magnet, and the other of said first attracting element and said second attracting element is a magnet or a metallic piece.

An automatic document feeder for feeding a sheet, said automatic document feeder comprising:

• a top cover having a fixing structure and a first attracting element disposed on an inner surface thereof, wherein said first attracting element is installed on said fixing structure such that a floating gap is formed between said first attracting element and said fixing structure;
• a sheet pick-up module arranged under said inner surface of said top cover, and comprising a driving shaft and a sheet pick-up arm, wherein said driving shaft is installed on a main body of said automatic document feeder, said sheet pick-up arm is pivotally coupled to said driving shaft, and said sheet pick-up arm is rotatable to either a standby position or a sheet feeding position, wherein said sheet pick-up module feeds said sheet into an internal portion of the automatic document feeder when said sheet pick-up arm is rotated to said sheet feeding position;
• and
• a second attracting element disposed on said sheet pick-up arm, wherein said first attracting element and said second attracting element are attracted by each other when said sheet pick-up arm is rotated to said standby position, so that said sheet pick-up arm is fixed on said standby position, further comprising an insulating piece, which is arranged on a surface of said first attracting element for reducing a magnetically attractive force between said first attracting element and said second attracting element.