| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a key frame of a piano capable of suppressing deformation, such as warpage, and curtailing the manufacturing cost by simplification of the assembly processes. <P>SOLUTION: The key frame 3 of the piano comprises a plurality of parts 5a, 5b, 5c, 6a, 6b, 7a, 7b, 8, and 9 which are respectively formed of synthetic resins and are mutually assembled. A plurality of the parts are formed of synthetic resins of materials varying from each other. Also, the key frame has a projecting part 18 for engagement which is protruded from one of the two parts assembled one another among a plurality of the parts and is elastically deformable and a recessed part 19 for engagement which is formed at the other part and can engage the projecting part 18 inserted with one part in the state of detaining the same. <P>COPYRIGHT: (C)2003,JPO</p> |
