| 摘要 |
<p>PROBLEM TO BE SOLVED: To incorporate the function for establishing a two-dimensional coordinate signal by providing a sub-shaft on the upper surface of a mounting base having a cantilever beam. SOLUTION: A cantilever beam detector 23 is printed between the free end 24 and fixed end 25 of a cantilever beam 22 formed by cutting a mounting base 21, first strain detectors 29, 30 and second strain detectors 31, 32 are printed at the side of a main shaft 26, which is press fitted fixedly into the base 21 of the upper surface of the beam 22. The sub-shaft 34 is inserted into the hollow part 27 provided at the shaft 26 at the upper surface, and an operating part 33 is assembled fixedly to the lower surface from the upper direction of the shaft 26. When the upper surface of the shaft 34 is pressed by a finger toward the lower part, the shaft 34 presses the end 24 of the beam 22, and hence the detector 23 is deformed concavely to the lower surface. The resistance value of the detector 23 is raised by the deformation to detect the load applied to the shaft 34. The signal of the resistance change of the detector 23 is amplified, the signal level arriving at the threshold value to be decided as a click decided previously by a binary circuit is transmitted to provide establishing function.</p> |
