Patent ID: 7659470

Claim:
A housing structure of an electronic keyboard musical instrument having a housing comprised of lower and upper cases which are separate from each other, the housing being completed by fixedly mounting the upper case to the lower case, comprising: upper fastening portions provided in left and right side portions of the upper case; lower fastening portions provided in left and right side portions of the lower case and adapted to face the upper fastening portions of the upper case when the upper case is positioned in a position for being mounted to the lower case; and left and right arms formed separately from the upper and lower cases, respectively, wherein the upper fastening portions of the upper case and the lower fastening portions of the lower case are fastened together by case fasteners applied from above, with the upper case positioned in the position for being mounted to the lower case, and wherein the left and right arms are fastened, from left and right sides, to the left and right side portions of at least one of the upper and lower cases, respectively, so as to cover the case fasteners to be invisible.