Patent ID: 7872779

Claim:
An image reading apparatus comprising: a main body; an image sensor fixed to the main body; a light scanning carriage to scan light onto a document and to reflect a light signal corresponding to the scanned light after reading the document; a light reflection carriage to reflect the light signal incident from the light scanning carriage to the image sensor; and a pair of transport modules to move the light scanning carriage and the light reflection carriage in a sub-scanning direction with a speed ratio of 2:1, the pair of the transport modules comprising: a first fixing pulley and a second fixing pulley connected to a driving source and separated from each other in the sub-scanning direction, a first carriage pulley and a second carriage pulley disposed on the light reflection carriage between the first and second fixing pulleys, and a wire having both ends fixed to the main body and having a portion fixed to the light scanning carriage, the wire being sequentially wound around the first carriage pulley, the second fixing pulley, the first fixing pulley, and the second carriage pulley.