| 摘要 |
PROBLEM TO BE SOLVED: To provide a structure of an apparatus provided with members having first and second plane parts which are freely housable and erectable to the apparatus body of particularly the apparatus and keyboard instrument having no lids. SOLUTION: The structure of the apparatus, such as the keyboard instrument 1, is constituted by fitting an upper face 2 and a lower case 3 to each other to constitute the apparatus (keyboard instrument) body 1, arranging planar detaining plates 5 and 5 which respectively face the rear surface of the lower case 3 and are first mounting means, withdrawing the member (music stand member) 7 which has the first plane part 7b detained into the spacing 6 between the inside surface parts 5a and 5a of the detaining plates 5 and 5 and the rear surface of the lower case 3 and the second plane part 7a inclined to a prescribed direction (90 to 110 deg.) therewith from the apparatus body and inserting either one of the first plane part 7b or the second plane part 7a into an engaging hole 8 formed in the rear face part 3c of the apparatus body 1. |
