Patent ID: 8582309

Claim:
A panel fixing structure, which removably fixes a panel to a rectangular opening provided in a housing, so as to cover a circumference of one or a plurality of interface terminal portions provided inside the housing, the panel comprising: a panel surface comprising four corner portions and having a connector opening in accordance with a shape and a position of the interface terminal portion; and four engagement protrusions each having a spring property, each engagement protrusion of the four engagement protrusions protruding in an insertion direction of the opening along an edge portion of each of four sides of the panel surface, the four engagement protrusions being formed to have a space between adjacent leading end corner portions in each of the four corner portions of the panel surface, said each engagement protrusion of the four engagement protrusions having a first wall portion which extends from each of four edge portions of the panel surface in the insertion direction of the opening, a second wall portion in which a leading end portion of the first wall portion is bent outside and which extends in the direction opposite the insertion direction of the opening, and a plurality of projections provided in an outer surface of the second wall portion along the longitudinal direction of the second wall portion, wherein if said each engagement protrusion of the four engagement protrusions of the panel is inserted into the opening, the projections make contact with the inside wall surface of the opening, and if said each engagement protrusion of the four engagement protrusions reaches an end portion opposite the insertion direction of the opening while bending in the inside direction of the opening, the engagement protrusion which was bent is brought back to an original condition, so that the projections are locked near the edge portion opposite the panel insertion side of the opening, and the panel is thereby fixed to the opening, and in each corner portion of the four corner portions of the panel surface, lengths of the adjacent leading end corner portions are different to each other such that distances from an intermediate line in a middle of the corner portion of the panel surface to the adjacent leading end corner portions are different to each other so as to prevent interference by one of the adjacent leading end corner portions with the other of the adjacent leading end corner portions, when bending each of the four engagement protrusions.