Patent ID: 7631865
Filing Date: 2009-12-15
Classification: B41J

Abstract:
1. A medium guide elevating device comprising: a rotor that is capable of being driven in forward rotation and in reverse rotation; a medium guide unit is moved to a first position when the rotor is driven in forward rotation, and is moved to a second position when the rotor is driven in reverse rotation; a sensor that has a selector switch that switches between an on state and an off state, wherein the sensor is switched to the off state when the medium guide unit is located between the first position and the second position; a first engaging portion that engages the selector switch to switch the sensor to the on state when the medium guide unit is moved to the first position; a second engaging portion that engages the selector switch to switch the sensor to the on state when the medium guide unit is moved to the second position; and a control unit that controls driving of the rotor, wherein the control unit detects when the sensor is switched between the off state and the on state and determines that the medium guide unit is moved to the first position or to the second position based on the sensor being switched from the off state to the on state and the direction of rotation of the rotor.