Blocking module and multi-function printer using the same

A multi-function printer, comprising:

• a body, having a rail, wherein a paper sheet is suitable to pass through the rail and conveyed into the body;
• a cover, assembled to the body in opened and closed way;
• and
• a blocking module, comprising:
• a linkage member, having a rotation shaft and a first end and a second end located at the both opposite sides of the rotation shaft, wherein the rotation shaft is freely pivoted at the cover;
• a blocking member, pivoted at the second end;
• and
• a driving module, assembled to the cover and located beside the first end, wherein the driving module moves towards the first end and applies a force onto the first end so as to drive the linkage member rotating in a second direction, when the driving module does not apply the force onto the first end, the blocking member makes the linkage member rotate in a first direction by means of the gravity thereof, and when the cover is opened relatively to the body, followed by being closed so that the blocking member leans against on the paper sheet on the rail, the paper sheet applies a counterforce onto the blocking member so as to drive the linkage member rotating in the second direction, wherein the first direction is opposite to the second direction.