Casing for optical scanning device, including positioning mechanism that positions main body on upper side with respect to main body on lower side, in horizontal and height directions, and optical scanning device having such casing

Abstract

A casing for an optical scanning device is configured to accommodate therein a scanning optical system. The casing includes a main body, a lid, a first positioning mechanism, and a second positioning mechanism. The main body includes an opening formed in an upper face. The lid closes the opening of the main body. The first positioning mechanism positions, when a plurality of the main bodies are stacked in a plurality of stages, the main body on an upper stage in a horizontal direction and a height direction, with respect to the main body on a lower stage. The second positioning mechanism positions, when a plurality of the casings, each having the lid attached thereto, are stacked in a plurality of stages, the casing on the upper stage in the horizontal direction and the height direction, with respect to the casing on the lower stage.