Patent ID: 8125446

Claim:
An input device used for inputting a signal into an electronic apparatus, comprising an operation key, metal domes and a touch sensor, wherein the operation key is switched between a push-button attitude in which the operation key inclines at an arbitrary position and a scroll attitude in which the operation key is pressed down along a circumferential direction with the push-button attitude so as to be operated, the metal domes are sensitive to the operation key in the push-button attitude so as to be brought into a conducting state, the touch sensor is sensitive to the operation key in the scroll attitude and an electrical value changes, and further the touch sensor is arranged over the metal domes, wherein the input device further comprises a convex portion for a touch sensor that is provided on the reverse side of the operation key and applies pressure on the touch sensor when a finger touches the operation key, and wherein the touch sensor includes: a flexible printed circuit board on which a circular resistive element is provided; and a metal plate coming into contact with the resistive element so as to allow the resistive element to be in a conducting state when the convex portion for a touch sensor is pressed against the flexible printed circuit board.