Patent ID: 8054326

Claim:
An image forming apparatus, comprising: an image forming unit configured to develop a formed electrostatic latent image on an image carrier, and form a toner image on the image carrier; a laser exposure unit to expose the image carrier, having a laser light source, a lens system which guides laser light emitted from the laser light source to a predetermined position, a light source board which supports the laser light source, a lens board which supports the lens system, a restricting member which joins the light source board and lens board such that they can relatively be moved with respect to each other in a first direction, an elongated hole for rotation movement which is formed in the light source board or lens board at the position on the extension of the center line connecting the center of the restricting member and that of the laser light source and whose long side extends in parallel to the center line, a circular hole for rotation movement which is formed in the light source board or lens board at the position facing the elongated hole for rotation movement and whose diameter is smaller than the length of the short side of the elongated hole for rotation movement, an elongated hole for slide movement which is formed in the light source board or lens board and whose short side extends along the first direction and a circular hole for slide movement which is formed in the light source board or lens board at the position facing the elongated hole for slide movement and whose diameter is smaller than the length of the short side of the elongated hole for slide movement; a transfer unit to transfer the toner image on the image carrier to a recording medium; and a fixing unit to fix the toner image on the image carrier.