摘要 |
A capacitance-type switch includes a pair of capacitive members, each comprising: (1) insulating material (10, 11); (2) a conductive element (14, 16) on one suface of the insulating material and (3) a dielectric film (15, 17) on the conductive element. At least one of the capacitive members is movable. In addition, the capacitive members are supported in spaced generally parallel alignement. The conductive elements (14, 16) face and are in general registration with one another, and the dielectric films (15, 17) are adjacent to but spaced from one another. Movement of the movable capacitive member into engagement with the other capacitive member causes the dielectric film (15) on the movable capacitive member to move into engagement with the dielectric film (17) of the other capacitive member, resulting in a detectable increase in the capacitance between the conductive elements of the capacitive members. |