| 摘要 |
<p>Any one of a switch sheet (3) and a support plate (18) is slid from a stand-by position to a retracted position in response to a closing operation of a lid (29). At the retracted position, part of a return spring (24) is accommodated inside a retracting hole (17) that is formed on a switch sheet (3). Even when the gap between a key top (2) and the switch sheet (3) becomes narrower by lowering the key top (2) upon closing the lid (29), part of the return spring (24) is retracted into the switch sheet (3), thereby allowing the return spring (24) to be retracted without being elastically deformed.</p> |
