Patent ID: 7543814

Claim:
An automatic paper feeding apparatus used in an electronic apparatus, wherein the automatic paper feeding apparatus comprises: a tray frame; a tray body for containing a plurality of sheets of top paper, wherein the tray body can move into and out from the tray frame; a paper-taking roller disposed on the tray frame, wherein the paper-taking roller moves the top paper in a rotating direction; at least a wiggling device disposed on the tray frame, wherein the wiggling device wiggles toward the paper-taking roller from an initial position; and a frictional roller disposed on the tray body, wherein the frictional roller has a plurality of frictional surfaces and contacting portions; wherein, when the tray body lies within the tray frame, the frictional roller is located between the wiggling device and the paper-taking roller, and when the paper-taking roller moves the top paper, one of the contacting portions of the frictional roller leans against the wiggling device situated at the initial position in the direction from the paper-taking roller to the wiggling device such that the frictional roller faces the paper-taking roller and contacts the top paper by the same frictional surface; when the tray body moves out the tray frame, the wiggling device situated at the initial position moves the contacting portion in the direction from the wiggling device to the paper-taking roller such that the frictional roller rotates and causes the other frictional surface of the frictional roller to face the paper-taking roller substantially; when the tray body moves into the tray frame, the wiggling device contacting the other contacting portion of the frictional roller wiggles toward the paper-taking roller from the initial position and wiggles back to the initial position until another frictional surface is close with the paper-taking roller.