| 摘要 |
<p>PURPOSE:To suppress influence by a noise as much as possible and to enable an accurate detection by arranging the line of a low impedance among a driving signal line, a state detecting signal line from a detecting means and a mechanism part control signal line from a control signal. CONSTITUTION:An EPC 100 is constituted so as to include a doughnut part 101 connected to a shutter mechanism in a lens barrel 2 and a wiring part, 102 connected to a camera main body 1. The wiring part 102 has a shutter driving line 103, a ground (GND) line 106, a lens driving line 104, another GND line 106 and a lens position detecting line 105 in order and the GND line 106 of the low impedance is wired among each of the shutter driving line 103 in which a large current flows, the lens driving line 104 and the lens position detecting line 105 in which a small signal flows. Thus, the interval between the lines of the large and small currents is widened and simultaneously the line of the low impedance is interposed among the lines, so that the influence by the noise is hardly received and the accurate detection can be attained.</p> |
