Patent ID: 7460142

Claim:
An image processing apparatus which comprises an optical unit wherein an optical instrument related to image processing is mounted in a chassis made from a single casting, and wherein legs contacting with an installation surface are provided with respect to a structure of said image processing apparatus in a protruding manner in three points corresponding to each corner of a rough triangle near edges of an undersurface of said image processing apparatus, wherein said optical unit is provided with supported engagement with said structure at three other points corresponding to corners of another triangle in nearly a same direction as said rough triangle formed by said legs when viewed from underneath, and wherein said optical unit includes two positioning axes at two of said three other points, said two positioning axes protruding nearly horizontally from the optical unit, said structure includes a vertical positioning plate having two holes in which said two positioning axes are received to provide a portion of said supported engagement associated with said two of said three other points, said optical unit further including an undersurface side having an undersurface contacting part protruding therefrom at a remaining third one of said three other points,said structure further including a horizontal positioning plate, said underside contacting part contacting said horizontal positioning plate in a nearly vertical direction to provide a remaining portion of said supported engagement associated with said remaining third one of said three other points.