IMAGE FORMATION APPARATUS

To provide an image formation apparatus in which a distance between an exposure head and a photoreceptor drum becomes uniform to improve the image quality.SOLUTION: A color printer includes: a photoreceptor drum 27 which carries a latent image on the surface; an LED head 16 which has a substrate along the array direction and a rod lens array in which a plurality of lenses having optical axes along the optical axis direction are arranged; an attachment 35 which is connected to the LED head with a shaft 44; an LED head holder 33 which holds the attachment; a spring 34 which biases the attachment toward the LED head; a positioning member 62 which is arranged in a contact spot Pc between the photoreceptor drum and the LED head to regulate the interval between the photoreceptor drum and the LED head; and contact ribs 35r1 and 35r2 which are arranged in the vicinity of a virtual straight line passing through the contact spot Pc and in parallel with the optical axis direction between the attachment and the LED head to bring the attachment and the LED head into contact with each other.SELECTED DRAWING: Figure 19 【課題】露光ヘッドと感光体ドラムとの距離が一定になり、画像品位を向上し得る画像形成装置を提供する。【解決手段】カラープリンタは、表面に潜像を担持する感光体ドラム２７と、配列方向に沿う基板と光軸方向に沿う光軸を有する複数のレンズが配置されたロッドレンズアレイとを有するＬＥＤヘッド１６と、シャフト４４によってＬＥＤヘッドと連結されるアタッチメント３５と、アタッチメントを保持するＬＥＤヘッドホルダ３３と、アタッチメントをＬＥＤヘッドに向けて付勢するスプリング３４と、感光体ドラムとＬＥＤヘッドとの間における当接箇所Ｐｃに配され、感光体ドラムとＬＥＤヘッドとの間隔を規制する位置決め部材６２と、アタッチメントとＬＥＤヘッドとの間において、当接箇所Ｐｃを通り光軸方向と平行な仮想直線の近傍に配置され、アタッチメントとＬＥＤヘッドとを当接させる当接リブ３５ｒ１及び３５ｒ２とを設ける。【選択図】図１９