Patent ID: 9670016
Date: 2017-06-06
CPC Classifications: B65H

Claim:
1. A transmission device of automatic document feeder, comprising: a pickup roller assembly; a paper-feed roller assembly including a paper-feed shaft, and a paper-feed roller mounted around the paper-feed shaft; a paper-out roller assembly including a paper-out shaft, and a paper-out roller mounted around the paper-out shaft; a pickup gear assembly for driving the pickup roller assembly; a first transmission gear assembly including a first one-way gear and a second one-way gear mounted around the paper-out shaft or the paper-feed shaft, and the first one-way gear and the second one-way gear rotating towards opposite directions; a second transmission gear assembly connecting the paper-out shaft and the paper-feed shaft for transmitting transmission torques; a drive gear assembly for driving the pickup gear assembly, the first transmission gear assembly and the second transmission gear assembly; and a motor bidirectionally driving the drive gear assembly, when the motor drives the drive gear assembly to rotate towards different directions, the pickup gear assembly driving the pickup roller assembly to rotate towards different directions, the motor driving the drive gear assembly to drive the first one-way gear together with the second transmission gear assembly or the second one-way gear together with the second transmission gear assembly to drive the paper-out shaft and the paper-feed shaft to unidirectionally rotate towards the same direction; wherein the first transmission gear assembly further includes a first transmission gear and a second transmission gear, the first transmission gear is engaged with the first one-way gear, two ends of the second transmission gear are respectively engaged with the first transmission gear and the second one-way gear.