| 摘要 |
PURPOSE: A thin keyboard is provided to have a structure preventing a first and a second levers from overlapping each other even when the key top descends, and to be reduced in thickness. CONSTITUTION: A thin keyboard is constructed so that a ratio of a dimension between a first latching portion(4a) of a first lever(4) and a pivotally supporting portion thereof to a dimension between this pivotally supporting portion thereof and a second latching portion(4b) thereof is equal to a ratio of a dimension between a first latching portion(5a) of a second lever(5) and another pivotally supporting portion thereof to a dimension between this pivotally supporting portion thereof and a second latching portion(5b) thereof. Thus, when the key top descends, the second latching portions of the first and the second levers are placed outside the first latching portions of the first and the second levers. Consequently, reduction in thickness of a keyboard is achieved.
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