| 摘要 |
PURPOSE:To easily insert and extract a key returning leaf spring. CONSTITUTION:While a boss 1d projected from the rear wall 1b of a key 1 is mounted slidably on a key fulcrum part 2c integrated with a keyboard frame 2, the key returning L-shaped leaf spring 3 is inserted into the opening part 1a on the surface of the key by gripping its knob part 3a and its tip part is engaged with the spring engagement part 2d of the keyboard frame 2. Then when the knob part 3a is pressed down, the leaf spring 3 curves upward and at the same time, an edge part 3c formed at its bent part slides on a tapered part 1j and engages the spring engagement part 1g of the key side, thereby energizing the key 1 clockwise. When the knob part 3a is pressed backward in the state, the knob part 3a turns clockwise around the fulcrum part 1a as a fulcrum and the edge part 3c is disengaged from the spring engagement part 1g. |
