| 摘要 |
PURPOSE:To obtain a pulse signal generator which produces no chattering nor sound for a long lifetime by selecting different through holes between left and right revolution modes with use of an idle angle between main and secondary rotary disks having through holes or reflecting plates and obtaining a pulse signal from the information light. CONSTITUTION:A main rotary disk 32 has a projection 51 which revolves a secondary rotary disk 33 when the disk 32 revolves more than an idle angle. At the same time, through holes 52 and 53 for light are provided on the radial lines led from the axial core of the disk 32. The disk 33 has stoppers 54 and 55 together with an idle angle theta and also has through holes 56 and 57 of angle theta. When a main shaft 31 is turned left, the through holes at the side further away from the axial core have coincidence between the disks 32 and 33. Thus four thrugh holes for light are produced. Under such conditions, the shaft 31 is continuously revolved. Thus four pulse signals are delivered every revolution by a photoelectric switch consisting of optical elements 36 and 37. The same result is also obtained when the shaft 31 is turned right. |
