Patent ID: 8441773

Claim:
An electronic element comprising: a first driving electrode; a second driving electrode; a fixed portion; and a movable portion which is movable with respect to the fixed portion and which is provided to generate a spring force to cause restoration of the movable portion to a predetermined position; wherein the fixed portion has the first driving electrode and a first signal electrode; the movable portion has the second driving electrode and a second signal electrode; an electrostatic force is generated between the first driving electrode and the second driving electrode by a voltage applied between the first driving electrode and the second driving electrode so that the electrostatic force resists against the spring force; the first driving electrode, the second driving electrode, the first signal electrode, and the second signal electrode are arranged so that the electrostatic force generated between the first driving electrode and the second driving electrode is generated in a direction in which a spacing distance between the first signal electrode and the second signal electrode is widened; the movable portion is urged by the spring force to contact with the fixed portion when the voltage is not applied between the first driving electrode and the second driving electrode, and the movable portion continues to be urged by the spring force to contact with the fixed portion as long as the voltage is not applied between the first driving electrode and the second driving electrode; the movable portion has a movable plate and plate spring portions arranged on both sides of the movable plate in a predetermined direction, the movable plate having the second signal electrode and the plate spring portions each having the second driving electrode; and the second driving electrode is constructed to be warped when the spacing distance between the first and second signal electrodes is widened.