| 摘要 |
<p>PURPOSE:To prevent erroneous input of a switch to improve the operability by judging that an operator does not have the will to input the switch in the case that the extent of depression or its variation with time exceeds a set value but the extent of movement of coordinates at this time does not exceed a set value. CONSTITUTION:An operation face 1a of a rigid body plate 1 is depressed with a finger or the like. Outpute of partial pressures applied to four piezoelectric elements 2a, 2b, 2c, and 2d are converted to digital quantities by A/D converters 4a, 4b, 4c, and 4d and are inputted to input ports 5a, 5b, 5c, and 5d. Coordinates of depression on the rigid body plate 1 are subjected to operation processing by a CPU 7 of a processing circuit 3 and are outputted from an output port 10. The CPU 7 detects whether the extent of depression or its variation with time exceeds the set value or not and discriminates whether the variation of coordinates exceeds the set value or not. When the extent of depression or its variation with time exceeds the set value but the extent of movement of coordinates at this time does not exceed the set value, the CPU 7 judges that the operator does not have the will to input the switch, and an input release signal is generated.</p> |
