| 摘要 |
A thin and inexpensive sheet with plate springs is provided which can prevent the entry of dust and other foreign matters and which is strong against static elasticity. One side of an adhesive sheet is studded with adhesive portions in a projected state, and vent portions are formed between the studded adhesive portions and between movable contacts and the exterior of the adhesive sheet to permit the entry and discharge of air. Consequently, the whole upper and lower surfaces of the movable contacts can be covered with the adhesive sheet and a separator to prevent the entry of dust and other foreign matters.
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