Patent ID: 8654413

Claim:
A reader for reading an image on a document, comprising: a housing including a platen on which the document is placed; a light source unit which moves along the platen and irradiates light toward the document; a mirror unit which works with the light source unit to define an optical path of the reflected light from the document in the housing; and a rotatable lock member mounted on one of the light source unit and the mirror unit, wherein: the housing includes an operation member, which is slid to fix the light source unit and the mirror unit, and a slide surface, which holds the sliding operation member; and the lock member is rotated between an engaged position, where the lock member is engaged with another of the light source unit and the mirror unit, and a disengaged position, where the lock member is disengaged from the other of the light source unit and the mirror unit in response to slide operation of the operation member.