A lock device includes a helical gear driven by a motor. The first body element carrying the display is rotated in a plane parallel with the plane of the display to reveal the display for usage with the flipped open folded keyboard in a second operative position. Air in the upper vicinity of a printing object is sucked through the suction port by the blower fan, ink mist included in the air is removed by the air filter, and cleaned air discharged through the ventilation port is blown to an LED circuit board, an LED drive circuit board. Signal lines may be coupled to the touch sensor electrodes.