Device for separating printing paper sheets and printer

A device for separating printing paper sheets, comprising:

• a base part defining a printing paper accommodating cavity, wherein a plurality of supporting strips are arranged on a bottom of the printing paper accommodating cavity;
• a deforming mechanism configured for arching a middle part of the printing paper sheets and enabling two edges to get closer to the bottom of the printing paper accommodating cavity, wherein the deforming mechanism comprises a supporting portion protruding upwardly from the bottom of the printing paper accommodating cavity, such that the middle part of the printing paper sheets is capable of being arched;
• and a pressing portion configured to press down two edges of the printing paper sheets, such that the two edges of the printing paper sheets are able to get closer to the printing paper accommodating cavity;
• a pressing element, wherein the pressing portion is respectively provided at two sides of the pressing element to enable sides of the printing paper sheets to get closer to the bottom of the printing paper accommodating cavity, and the pressing portion and the pressing element are integral;
• and
• an obstruction element, wherein the obstruction element is provided with a middle access portion in cooperation with the deforming mechanism, and on two sides of the middle access portion is arranged with at least one blocking portion through which only one of the printing paper sheets can pass at a time;
• both sides of the obstruction element are arranged with an avoidance portion respectively, and between the middle access portion and each one of the avoidance portions are provided with the blocking portions;
• and the avoidance portions, the middle access portion and blocking portions are integral.