| 摘要 |
<p>A cover (29) is closed, and either a switch sheet (3) or a support plate (18) is slid from a waiting position to a retraction position in synchronization with an operation. At the retraction position, a part of a return spring (24) is accommodated in a retraction hole (17) made in the switch sheet (3). When the cover (29) is closed, a key top (2) is pressed down and the distance between the key top and the switch sheet (3) is decreased. However, since the part of the return spring (24) is retracted into the switch sheet (3), the return spring (24) can be retracted without elastically deforming the return spring (24).</p> |
