A transmission device of automatic document feeder adapted for being assembled in an automatic document feeder, the automatic document feeder including a pickup device, a correction device, a paper-feed device, a paper-out device, a turn-over device and a motor, the transmission device of automatic document feeder for transmitting transmission torques of the motor, the transmission device of automatic document feeder comprising:
- a transmission gear assembly connected with and driven by the motor, the transmission gear assembly including a transmission roller connecting with the motor, a first drive gear and a second drive gear respectively driven by the transmission roller;
- a pickup transmission gear assembly including a pickup drive gear, a pickup swing arm coaxially pivoted with the pickup drive gear, and a pickup auxiliary swing arm coaxially pivoted with the first drive gear of the transmission gear assembly, the pickup swing arm swinging between a first position and a second position with the rotation of the pickup drive gear, and the pickup auxiliary swing arm swinging between a third position and a fourth position with the rotation of the first drive gear of the transmission gear assembly, when the motor rotates clockwise to make the pickup swing arm to swing to the first position, the pickup transmission gear assembly contacting the pickup device and transmitting a first transmission torque to the pickup device, at the moment, the pickup auxiliary swing arm swinging to the fourth position, the pressure transmission gear assembly contacting the paper-out device and transmitting a second transmission torque to the paper-out device, when the motor rotates anticlockwise to make the pickup swing arm to swing to the second position, the pickup transmission gear assembly contacting the paper-out device and transmitting a third transmission torque to the paper-out device, at the moment, the pickup auxiliary swing arm swinging to the third position, the pickup transmission gear assembly contacting the pickup device and transmitting a fourth transmission torque to the pickup device;
- a paper-feed transmission gear assembly driven by the transmission gear assembly, and the transmission gear assembly rotating towards different directions to drive the paper-feed device to rotate or stop rotating, the paper-feed transmission gear assembly including a paper-feed reverse gear engaging with the transmission roller of the transmission gear assembly, and a paper-feed swing arm coaxially fastened to the paper-feed reverse gear, the paper-feed swing arm swinging between a fifth position and a sixth position with the rotation of the paper-feed reverse gear of the paper-feed transmission gear assembly, when the motor rotates anticlockwise to make the paper-feed swing arm swing to the fifth position, the paper-feed transmission gear assembly engaging with the paper-feed device and transmit a fifth transmission torque to the paper-feed device, when the motor rotates clockwise to make the paper-feed swing arm swing to the sixth position, the paper-feed device rotating anticlockwise to stop feeding the paper;
- a correction transmission gear assembly driven by the paper-feed transmission gear assembly, and the correction transmission gear assembly and the paper-feed transmission gear assembly rotating towards the same direction;
- a pressure transmission gear assembly including a pressure swing arm coaxially fastened with the first drive gear of the transmission gear assembly, and a pressure actuating gear pivoted to the pressure swing arm, the pressure swing arm swinging between a seventh position and an eighth position with the rotation of the transmission roller of the transmission gear assembly, when the pressure swing arm swings to the seventh position, the pressure actuating gear of the pressure transmission gear assembly breaking away from the paper-out device, when the pressure swing arm swings to the eighth position, the pressure actuating gear of the pressure transmission gear assembly engaging with the paper-out device, and transmitting a sixth transmission torque to the paper-out device;
- and
- a turn-over transmission gear assembly driven by the first drive gear of the transmission gear assembly, no matter towards which direction the first drive gear of the transmission gear assembly rotates, the transmission gear assembly being able to transmit the transmission torque with the same direction to the turn-over device,
- wherein when the pickup swing arm swings towards the first position, the pickup auxiliary swing arm swings towards the fourth position, the paper-feed swing arm swings towards the sixth position, the pressure swing arm swings towards the eighth position, when the pickup swing arm swings towards the second position, the pickup auxiliary swing arm swings towards the third position, the paper-feed swing arm swings towards the fifth position, and the pressure swing arm swings towards the seventh position.