Abstract: A multi-function printer is provided. A trigger piece is fixed to the first module and stretched into a second module. A wedging piece is disposed in the second module and protruded from the second module. An actuating piece and a join piece are disposed in the second module. The actuating piece has a first end connected to the actuating piece and a second end positioned close to the trigger piece. When the three modules are stacked together, the trigger piece goes against the wedging piece and the actuating piece goes against a third module. When the first module is rotated, the trigger piece is separated from the wedging piece such that the wedging piece can be wedge with the third module. When the second module is rotated, the actuating piece drives the joint piece to wedge with the trigger piece.

Abstract: A sheet feeding mechanism having a pickup roller, a switch device, and a gear set is disclosed. The pickup roller drives a recording material to a first path, and the recording material proceeds from the first path to a second path or from a third path to a fourth path when the switch device is switched to a first position, and proceeds from the first path to the third path when the switch device is switched to a second position. The gear set drives the recording material from the first path to the third path when the switch device is switched to the second position and drives the recording material from the first path to the second path, from the third path to the fourth path, and from the fourth path to the first path when the switch device is switched to the first position.

Abstract: A sheet feeding mechanism having a pickup roller, a switch device, and a gear set is disclosed. The pickup roller drives a recording material to a first path, and the recording material proceeds from the first path to a second path or from a third path to a fourth path when the switch device is switched to a first position, and proceeds from the first path to the third path when the switch device is switched to a second position. The gear set drives the recording material from the first path to the third path when the switch device is switched to the second position and drives the recording material from the first path to the second path, from the third path to the fourth path, and from the fourth path to the first path when the switch device is switched to the first position.

Abstract: A multi-function printer is provided. A trigger piece is fixed to the first module and stretched into a second module. A wedging piece is disposed in the second module and protruded from the second module. An actuating piece and a join piece are disposed in the second module. The actuating piece has a first end connected to the actuating piece and a second end positioned close to the trigger piece. When the three modules are stacked together, the trigger piece goes against the wedging piece and the actuating piece goes against a third module. When the first module is rotated, the trigger piece is separated from the wedging piece such that the wedging piece can be wedge with the third module. When the second module is rotated, the actuating piece drives the joint piece to wedge with the trigger piece.

Abstract: A paper pickup mechanism mounted in a feeder includes several driving gears, connecting rods, a pickup roller and a twist restricting gear. By means of the twist restricting gear, the paper pickup mechanism provides an equal pickup force under different paper loads. Furthermore, the operational precision of the pickup roller is improved via relative motion with the twist restricting gear.

Abstract: A paper pickup mechanism mounted in a feeder includes several driving gears, connecting rods, a pickup roller and a twist restricting gear. By means of the twist restricting gear, the paper pickup mechanism provides an equal pickup force under different paper loads. Furthermore, the operational precision of the pickup roller is improved via relative motion with the twist restricting gear.