PURPOSE: To enhance the reliability of the device, by driving a timing detector through a rotary shaft except for a type wheel shaft and operating a printing OK signal generator through a cam provided on the rotary shaft and through a lever which acts to the cam.
CONSTITUTION: The detection disc 115 of a timing detector, which produces for producing a type wheel selection timing signal is driven by a rotary shaft 103 except for a type wheel shaft. A signal corresponding to a type and a motor stop signal are generated by the rotation of the disc 115 following the shaft 103 whenever a type signal producing perforated hole 1151 and a motor signal producing perforated hole 1152 pass by a photo-sensitive element 307. When the notch 1161 of a cam 116 is located at the arm 3041 of a lever 304 ad a result of the rotation of the cam following that of the shaft 103, the lever 304 and the cam 116 are disengaged from each other so that the lever swings by a spring 306 centering a shaft 303 until the lever comes into contact with a stopper 3012 provided on a holder 301. At that time, a permanent magnet 305 is displaced down from the center of a reed switch 302 to cause a printing OK signal generator 302 to produce a printing OK signal.
OOKUBO KOUZOU
YOSHIDA HIROMI
HASEGAWA YUUICHI
KOBATA YOSHIHIRO
CANON DENSHI KK