| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce the power consumption. SOLUTION: A flat resistor RR comprising carbon is formed on a substrate 110. A circular cavity region is provided on the center part of the resistor RR, and semicircular contact electrodes S1, S2 are formed. An elastically deformable body 121 to be deformed downward by function of an external force is arranged over the substrate 110, and a hemispheric contact conductor C comprising conductive rubber is mounted on the under surface thereof. The conduction state between terminals T3, T4 is monitored, and, only when the contact electrodes S1, S2 are conducted, a prescribed voltage is applied between terminals T1, T2, and a resistance value between two points sandwiching the resistor RR is measured. When a great external force functions, the contact conductor C is pressed downward to enlarge the contact area to the resistor RR. By utilizing reduction of the resistance value between the two points sandwiching the resistor RR resulting therefrom, the magnitude of the external force is detected based on the measured resistance value.</p> |
