Automatic paper feed device

An automatic paper feed device, comprising:

• a mechanical frame;
• a paper supply tray mounted to the mechanical frame;
• at least one motor mounted to one side of the mechanical frame;
• an upper cover disposed above the paper supply tray to cooperate with the paper supply tray by a rear end thereof being pivotally mounted to a rear end of the paper supply tray, the upper cover being covered on the paper supply tray to from an accommodating space located between fronts of the upper cover and the paper supply tray, and a feed channel located between rears of the upper cover and the paper supply tray and communicating with the accommodating space;
• a stopper mechanism including a blocking element and a torsion spring, the blocking element having a first pivoting shaft pivotally mounted to the upper cover, and at least one blocking arm extended downward from a bottom of the first pivoting shaft to project under the upper cover and locate between the accommodating space and the feed channel, the torsion spring being pivotally connected to one end of the first pivoting shaft with one end thereof elastically abutting against the upper cover and the other end thereof elastically abutting against the blocking element;
• a paper pressing mechanism including a pressing board, at least one pressing roller and an elastic element, the pressing board being slidably assembled to the upper cover, the pressing roller being pivotally disposed to the pressing board with a bottom thereof projecting under the pressing board, one end of the elastic element elastically abutting against the upper cover and the other end of elastic element elastically abutting against the pressing board;
• a transmission mechanism, one end of the transmission mechanism being connected with the motor and the other end of the transmission mechanism supporting the paper pressing mechanism;
• a feed mechanism pivotally mounted to the paper supply tray with a top thereof projecting into the accommodating space;
• and
• a control mechanism including a sensor disposed to the upper cover and projecting into the accommodating space,
• wherein the control mechanism controls the motor to rotate, the rotation of the motor drives the transmission mechanism to support or break away from the pressing board of the paper pressing mechanism to make the pressing board slide upward or downward with respect to the paper supply tray and further abut against or break away from the blocking element of the stopper mechanism.