Patent ID: 6978998

Claim:
A positioning structure of a roller adapted for an auto document feed apparatus having a transmission shaft, an active roller sleeved on the transmission shaft and a driven roller rotationally contacted with the active roller; the positioning structure comprising: two flexible shafts pivotally contacted with the driven roller of the auto document feed apparatus, each of the two flexible shafts being a spring spirally extending along an axial line thereof; and a flexible arm, the flexible arm including two first portions, a second portion, and two third portions, the two first portions respectively extending from the two flexible shafts, the second portion being fixedly arranged inside a clamping portion of the auto document feed apparatus, the second portion having a curved shape with an acute angle and having two ends, the two third portions respectively extending from the two ends of the second portion to the two first portions to provide a reaction force against the active roller.