KEY SWITCH STRUCTURE AND PORTABLE TERMINAL DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a key switch structure which achieves water cut-off performance and is simple and small.SOLUTION: A key switch structure includes: a housing; a substrate disposed within the housing; a key switch circuit pattern directly formed at the housing and configured to contact with a circuit formed on the substrate; a dome switch disposed on the key switch circuit pattern; a water cut-off sheet covering the dome switch; and a key top partially exposed to the outside of the housing and configured to press the dome switch. The structure provides a key switch structure which achieves water cut-off performance and is simple and small.SELECTED DRAWING: Figure 2