Automatic document feeding device

An automatic document feeding device, comprising:

• a main body, comprising a sheet conveying channel disposed therein, wherein the sheet conveying channel is of a curvature shape, a buffering channel is defined in a manner of a portion of the sheet conveying channel being expanded, and a sheet feeding roller assembly and a sheet conveying roller assembly are respectively arranged at two positions of the sheet conveying channel;
• a stopping assembly, arranged between the sheet feeding roller assembly and the sheet conveying roller assembly and adjacent to the sheet conveying roller assembly, movably disposed on the main body and located in the sheet conveying channel or outside the sheet conveying channel, and the buffering channel located between the stopping assembly and the sheet feeding roller assembly;
• an actuating assembly, arranged on the main body corresponding to the stopping assembly and configured to move, hold or release the stopping assembly;
• and
• a controller, electrically connected with the actuating assembly and the sheet feeding roller assembly, wherein after the controller actuates the sheet feeding roller assembly, the controller controls the actuating assembly to hold the stopping assembly in the sheet conveying channel to block the sheet conveying channel in a predetermined period, and then controls the actuating assembly to stop the stopping assembly from blocking the sheet conveying channel,
• wherein the buffering channel is defined at a convex side of the sheet conveying channel.