| 摘要 |
PURPOSE:To prevent blur in continuous shooting time, by eliminating the residual torque which is caused by the reversing of a motor when a film is advanced and avoiding the force which is applied to the film in the take-up direction. CONSTITUTION:The diagram shows a motor-driven film advancing circuit and a camera circuit. When releasing is over, a switch 27 is switched to (b). Thus a transistor TR9 is turned on, and a capacitor 21 is charged. The potential of the capacitor 21 is discharged, and as a result, the TR9 is turned off. Thus a TR10 is on and a TR12 is off, and at the same time a TR11 is turned on. Thus a motor 13 advances a film. When the film advancing is over, a switch 27 is changed to (a). Then a circuit of a TR10, a resistance 18 and a diode 7 is also turned off, and as a result the TR9 is turned on. In this case, the TR10 is off, the TR12 is on and the TR11 is off, respectively. Thus the motor 13 is reversed to eliminate the residual torque. |
