| 摘要 |
A key sheet is equipped with a keytop exposed through an operational opening with no partition frame formed in the casing of an apparatus, the keytop being adapted to be depressed into the casing, and a base sheet to which the keytop is firmly attached, in which it is possible to achieve a further reduction in the thickness of the base sheet. In this key sheet, the base sheet is equipped with a pedestal portion to which the keytop is firmly attached and a frame-like support portion supporting the pedestal portion so as to allow its displacement, wherein a clearance portion allowing the keytop to avoid press contact with the frame-like support portion at the time of depressing operation is formed in the outer edge side portion of the bottom portion of the keytop opposed to the frame-like support portion, whereby even if the pedestal portion is thin, it is possible to perform depressing operation on the keytop without any fear of the keytop being caught by the frame-like support portion.
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