Patent ID: 8553062

Claim:
An optical scanner comprising: an optical element disposed in an optical path extending from a light source to a photo conductor for adjusting a light emitted from the light source so as to irradiate a predetermined position on the photo conductor, the optical element having a first side-face that is parallel to a longitudinal direction of the optical element and a second side-face that is opposed to the first side-face; an eccentric cam disposed so as to be mountable selectively opposed to either the first side-face or the second side-face for pressing the first side-face or the second side-face; an attaching portion that is disposed opposed to each of the first side-face and the second side-face for mounting the eccentric cam thereon; a first supporting member disposed opposed to the first side-face; a second supporting member disposed opposed to the second side-face; and an elastic member that is disposed opposed to either the first side-face or the second side-face and presses the optical element so that the optical element is in contact with any one of the eccentric cam, the first supporting member, and the second supporting member; wherein the first supporting member restrains the optical element from being caused to move in a lateral direction of the optical element by a pressing force from the eccentric cam when the eccentric cam is disposed opposed to the second side-face; the second supporting member restrains the optical element from being caused to move in a lateral direction of the optical element by a pressing force from the eccentric cam when the eccentric cam is disposed opposed to the first side-face; and wherein a distance between a face opposed to the first side-face in the first supporting member and a face opposed to the second side-face in the second supporting member is set to be longer than a distance of the optical element in the lateral direction thereof.