Patent ID: 7207561

Claim:
A sheet feeder comprising: a feed roller rotating around a rotary shaft and feeding a sheet; a pinch roller pressing the sheet to the feed roller; a feed roller gear provided on the rotary shaft of the feed roller; an intermediate gear having a circular bearing and rotating the feed roller gear; a driving transmission gear attached to a drive shaft of a motor and rotating the intermediate gear based on the drive of the motor; an intermediate gear support shaft supporting the circular bearing of the intermediate gear rotatably; the intermediate gear support shaft including a bearing engaging part which has a sectional shape having a D-shaped cut having a flat part and a circular part; and two support parts located on the boundary line between the flat part and the circular part, wherein: the intermediate gear support shaft is inserted into the bearing of the intermediate gear; wherein the support parts are arranged so as to support the circular bearing of the intermediate gear at two positions sloping by a predetermined angle right and left for the line of a force which passes the center of the intermediate gear and is applied to the intermediate gear from the rotation; and the two support parts have a chamfered or rounded shape.