| 摘要 |
<p>PURPOSE:To facilitate the assembling operation by providing a lock part to a frame and forming a positioning part which is locked to the lock part to have its motion controlled in the length and width direction at the rear end part of a key. CONSTITUTION:The positioning part 99 formed at the rear end part 52 of the key 15 is locked to the lock part 97 provided to the frame 13 and its rear end part 52 is fixed to the frame 13, so that the key 15 is supported on the frame in a free oscillation state. At this time, the positioning part 99 is locked to the lock part 97 and then the motion of the rear end part 52 of the key in the length and width directions is controlled. Consequently, when a key tip part is oscillated upward and downward about the key rear end part 97 as a fulcrum to fit the key to the frame 13, the rear end part 52 never shifts from the frame 13. Consequently, the assembling operation is facilitated.</p> |
