Patent ID: 7607654

Claim:
A sheet feeding apparatus comprising: a sheet stacking portion for stacking a sheet; a sheet feeding roller for feeding the sheet stacked on said sheet stacking portion; a first arm, disposed rotatably about a supporting portion, for rotatably supporting said sheet feeding roller, wherein said first arm has a boss; and a second arm, disposed rotatably about said supporting portion, for rotatably supporting said sheet feeding roller, wherein said second arm has an elongated hole slidably engageable with the boss; wherein said elongated hole engages with the boss with respect to a rotational direction of said first and second arms rotatable about said supporting portion, wherein said elongated hole has a length, with respect to a direction of a straight line connecting a rotation center of said supporting portion and a rotation center of said sheet feeding roller, larger than an outer diameter of the boss and wherein during sheet feeding operation, moments generated by resistance provided from the sheet to said sheet feeding roller, with respect to said first arm and said second arm about an axis normal to a surface of the sheet stacked on said sheet stacking portion at said supporting portion as a rotation center, have the same direction.