Sheet with plate springs and switch device using same
AssigneeAlps Electric Co., Ltd.
InventorKenichi Takahashi
Life of this patent
Estimating the term…
Abstract
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.
Claims6
A sheet with plate springs, comprising:
- an adhesive sheet having adhesive portions on one side thereof;
- a plurality of plate springs each constituted of a deformable metallic plate having resilience and with the adhesive portions affixed to upper surfaces thereof;
- and
- a sheet-like separator affixed to the adhesive sheet to protect lower surfaces of the plate springs,
- wherein the one side of the adhesive sheet is studded with the adhesive portions each in a projected form, and vent portions are formed between the studded and projected adhesive portions and between the plate springs and an exterior of the adhesive sheet so that air gets in and out of the vent portions,
- wherein the area of each of the studded and projected adhesive portions is smaller than the area of the upper surface of each of the plate springs, and
- wherein the spacing between adjacent studded and projected portions of the adhesive is smaller than the size of each of the plate springs.
Dependencies are inferred from the claim text.