Anti-impact easily opened can lid

A can lid comprising:

• a top plate having a center which is a fulcrum point;
• a tab having a tab nose at one end thereof and a force application point at another end of said tab and coupled substantially to the center of said top plate by a rivet, wherein the tab nose is arcuate;
• a score formed in said top plate and having a start point and an end point with a hinge space therebetween in front of said rivet;
• an opening piece surrounded by said score, said opening piece being adapted to be depressed by said arcuate tab nose so as to open said lid;
• a semicircular tab nose recess formed in said opening piece underneath said arcuate tab nose and conforming in shape with said tab nose, the arcuate curve of said tab nose being engagable with the bottom of said semicircular tab nose recess, along a part of said score and having a smooth bottom surface with no step part, for receiving said arcuate tab nose and being pressed by the tab nose when said tab is pulled up, said force application point, fulcrum point and tab nose being in one straight line;
• and
• said tab nose recess having a straight side perpendicular to the straight line formed by said force application point, fulcrum point and tab nose opposite said semicircular curve.