| 摘要 |
PURPOSE:To easily, speedily, and accurately fit plural keys at a time by facilitating operation at the time of the incorporation of a key units having plural keys in a frame. CONSTITUTION:When the key unit where the keys 509 are supported independently in a free oscillatory state is fitted to the frame 13, a hook-shaped projection 121 provided in the common fitting part 52 of the key unit is inserted into the positioning engagement hole 127 of the frame 13 and then the frame 13 is clamped with the claw of the hook-shaped projection 121 and the common fitting part 52 to position and engage the key unit, which is fixed to the frame 13 with the elastic force of the elastic leg part of the hook-shaped projection 121. |
