Patent ID: 8014667

Claim:
An imaging device comprising exterior members including a top sheet metal casing secured to a front sheet metal casing or a back sheet metal casing, wherein, the top sheet metal casing has a multi-layered structure including a top plate, and a catch plate secured to the top plate such that at least a portion of its perimeter is spaced apart from the top plate at a predetermined distance, the front sheet metal casing or the back sheet metal casing has an insertion portion disposed between the top plate and the catch plate that are spaced apart at said predetermined distance, and in a completely assembled state of the top sheet metal casing with the front sheet metal casing or the back sheet metal casing, the insertion portion is disposed between the top plate and the catch plate with the catch plate being deformed so as to enlarge said predetermined distance, the catch plate is biased toward the top plate and pressed upon the insertion portion, and the insertion portion is secured to the catch plate.