Patent ID: 8792803

Claim:
A housing engagement structure used for a housing to accommodate therein an apparatus body, comprising: a first housing member including a first wall having a first overlap portion being one end of the first wall; and a second housing member including: a second wall having a second overlap portion being one end of the second wall configured to be in contact with an inner surface of the first overlap portion of the first wall and overlapped with the first overlap portion; and a first reinforcement rib projected from an inner surface of the second wall and extending to a position to be in contact with an inner surface of the first wall in the vicinity of the first overlap portion thereby reinforcing the first overlap portion, wherein the inner surface of the first overlap portion of the first wall and the inner surface of the second overlap portion of the second wall face an interior of the housing within which the apparatus body is accommodate, wherein a portion of the inner surface of the first wall that faces the first reinforcement rib is recessed.