A thin film transistor includes a substrate, and a pair of sourcedrain electrodes formed on the substrate and defining a gap therebetween. The sheet feed device also includes a sheet feeder configured to feed the first plurality of sheets and the second plurality of sheets in a sheet feed direction toward a recording unit, and a sheet separator configured to separate, one by one, the sheets fed by the sheet feeder. The rocker has a first head cooperating with the latch pin upper end to move the latch pin when turning the rocker around the pivot shaft, and a second head to which a downwards impacting force can be directed to turn the rocker around the pivot shaft to lift the latch pin from the stop to the release location against springback of the first spring. Furthermore, the engaged section is attached to the back surface of the front-side cover.