Patent ID: 7249760

Claim:
A paper pickup mechanism mounted in a feed tray, comprising: a pickup shaft; a gear set, including: a transmission gear provided at one end of the gear set, a center of the transmission gear being pivotally connected to the pickup shaft; a driving gear, transmitting power from a power source; a first driven gear that is engaged with the driving gear; a second driven gear that is engaged with the first driven gear and engaged with the transmission gear; a first connecting rod that connects the driving gear to the first driven gear and to the second driven gear; and a second connecting rod that connects the transmission gear to the second driven gear; a pickup roller, mounted in the feed tray and being pivotally connected to the pickup shaft; a set of interconnected swing arms, one of the swing arms being connected to the pickup roller, and another of the swing arms being connected to a suspended arm in the feed tray; a twist restricting gear, disposed on a side of the feed tray, and engaging with the transmission gear; and means for allowing the twist restricting gear to rotate only when a twist force provided by the gear set applied to the twist restricting gear is greater than a predetermined force; wherein the transmission gear is mounted outside the feed tray, and the feed tray has a sidewall slot through which the pickup shaft penetrates.