| 摘要 |
<p>PURPOSE: To provide the keyboard which can easily be manufactured at low cost irrelevantly to the size of a piano and its manufacture. CONSTITUTION: The keyboard 10 consists of a keyboard block 11 and a keyboard material 16. The keyboard block 11 is made of acrylic resin and has step parts 12 and 12 where black keys are arranged on both the right and left sides; and a front pin loose hole 13 is formed on the front side of the bottom surface, an opening 14a is formed in the rear end surface, and an insertion hole 14 is bored from the opening 14a to the center. The keyboard material 16, on the other hand, is a wooden member in a quadrangular prism shape whose thickness is nearly uniform and its front end part is fixed while inserted into the insertion hole 14 to specific length. Here, the specific length is determined corresponding to the size of the piano and the length of the keyboard becomes longer and longer as the piano is larger and larger, so the insertion length becomes shorter and shorter.</p> |
