Importance

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Abstract

Disclosed is a switching device for selecting an operational instruction and deciding the operational instruction, and a portable terminal device having the same switching device capable of preventing a malfunction of the switching device. The switching device comprises a decision switch 4, selection switches 5a, 5b, a key base 6, a guide 9, a key top 12. The switching device is constructed such that pressure applied to a central portion of the key top is transmitted to the decision switch through the key base, and the force resulting from tilting of the key top away from a central axis is transmitted to the selection switches through the guide and the key base. Additionally to this structure, an interstice is provided between the key top and the guide, the decision switch is formed as a domed switch of more layers than the selection switch, an interstice is provided between the decision switch and the key base, and through holes 8a, 8b are provided in the key base respectively between the portion corresponding to the upper portion of decision switch and the respective portions corresponding to the upper portions of the selection switches.

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First Claim