| 摘要 |
The invention provides a force detector in which power consumption is suppressed. Four electrodes E 11 through E 14 are formed on a substrate, and an elastic deformable body formed of a rubber film is disposed thereon. A conductive coating is applied on the lower surface of the elastic deformable body to provide a displacing conductive layer 26 . Four capacitance elements C 11 through C 14 are comprised by the electrodes E 11 through E 14 and the displacing conductive layer 26 opposed to the electrodes. The capacitance values thereof are converted into voltage values V 11 through V 14 by C/V converter circuit 50 , and based on operation by signal processing circuit 60 , an external force applied to the elastic deformable body is detected. A pair of contacting electrodes E 15 and E 16 are formed on the substrate, and when an external force with a predetermined strength or more is applied, the elastic deformable body deforms, and the displacing conductive layer 26 comes into contact with both electrodes E 15 and E 16 , simultaneously. The potential of the electrode E 16 is taken-in from the terminal T 5 , and when said potential is Vcc, the C/V converter circuit 50 is operated in a standby mode with less power consumption, and when said potential is GND, the circuit is operated in a normal mode.
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