PURPOSE: To execute remote control, and to execute easily the control by inputting an output of a current detecting circuit to a signal generator and a motor polarity switching device, inputting a signal from the signal generator to the motor polarity switching device, and inputting a signal of the motor polarity switching device to a motor.
CONSTITUTION: When a power source is inputted, an electric power is supplied to a motor polarity switching device 26. On the other hand, when strong, intermediate and weak impact force selecting buttons provided on a signal generator 23 are selected and operated, its corresponding control signal is inputted to the motor polarity switching device 26, and an electric power is transmitted to an electrode clutch 7 and a micromotor 11. As a result, the motor 11 and the clutch 7 give the operations of the rotating direction, and contact and cut to three devices, respectively. In this case, the selectively operated electromagnetic clutch 7 becomes contact and rotates a driving shaft 13. As for slide metallic fittings 3, however, its rotation is restricted by a guide 5, therefore, they move forward or backward in accordance with a rotation of the driving shaft 13.
SUMIMOTO YASUO
ASAKURA TADAYOSHI
KAWANO YOSHINARI
SAKABE KAZUOMI
