| 摘要 |
<p>PURPOSE:To improve the adjustment precision, by providing a stepped resistance plate and brushes for photographic information input adjustment and a constitution capable of recognizing relative positions of them. CONSTITUTION:A sliding resistance plate as an input adjustment means for photographic information such as shutter seconds, film sensitivity, and lens opening F value consists of a fixed resistance RO, a resistance VRSV of a potentiometer type variable resistor, many tap electrodes 53 brough into contact with this resistance VRSV, and a conductor pattern 54 which are arranged around an attaching hole 51 on an insulating substrate 50, and one of a pair of sliding brushes slides on sliding parts 53a connected to leading-out parts 53, and the other brush slides on the common pattern 54. Electrodes 55a and 55b having a gap are provided in the initial set position (indicated by the one-dot broken line). When the brush is placed in positions A, B, and C, an equivalent measuring circuit realizes as shown in (A), (B), and (C) of figure respectively, and different outputs are inputted from an operational amplifier 134 to a meter for display. Consequently, the adjustment precision is improved.</p> |
