| 摘要 |
In a circular opening of an upper surface of a chassis, a disk-like zoom adjusting knob and a circular ring-like focus adjusting knob are disposed so as to be rotatable. A zoom interlocking mechanism includes a pinion-rack mechanism and a slide cam. A focus interlocking mechanism includes a pinion-rack mechanism and a slider. The zoom adjusting knob, zoom interlocking mechanism, and zoom adjusting member and the focus adjusting knob, focus interlocking mechanism, and focus adjusting member are fitted to a common body structure to construct a projecting optical unit.
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