JPS5456824A - Motor control circuit of self-processing type camera - Google Patents

Abstract

PURPOSE: To achieve the stabilization of pressure-processing of film units by providing a switching circuit which turns ON an electric motor when the supply current of the motor is above a reference value and turns OFF the motor when it is below the reference value.

CONSTITUTION: When the end of a film unit is fed between pressure rollers 9, 9 by the forward movement of a reciprocating member 13 upon ending of exposure, the lower cam 39 of the reciprocating member 13 oscillates a timing lever 35 in the disengagement direction, thus disengaging a stopping lever 26. The stopping lever 26 then turns OFF a switch 40. However, the supply current of the motor has become higher than a reference value because the film is under pressure-processing and therefore, the motor runs in succession. When the film unit is sent out from the pressure rollers 9, 9, the load of the motor decreases and becomes lower than the reference value, then the motor stops. Thus, stopping of the motor on the way of the pressure processing does not occur at all and the stable pressure processing of the film unit may be performed

COPYRIGHT: (C)1979,JPO&Japio