| 摘要 |
PURPOSE:To position a filter, etc. of a color copying device surely and to hold the accurate stop position easily and surely by stopping a driving means and locking a movable member upon detection of the prescribed position of the movable member. CONSTITUTION:When a three color switch or the like is turned on, which of filters 23-26 is in a reference position is judged by a microswitch group 30 via a cam for generating the position signal of a positioning plate 27 which turns integrally with the filters 23-25 for 3 colors and the filter 26 for attenuating quantity of light. The starting and stopping of a motor 21 for rotating and driving the filters 23-26 for the purpose of selection according to the judgement of the group 30 is controlled by a control part 31 and a locking bar 29 which locks the selected filters 23-26 in the reference position according to the stopping thereof in said position is controlled by a solenoid 28. Therefore, the filters are positioned accurately and are held in the accurate stop position by the simple constitution. |
