| 摘要 |
PROBLEM TO BE SOLVED: To surely feed power to a power line at connection of a connector means, after connection of a signal line with a ground line by turning on an on/off switch means so as to feed power to the power line at the connection of the connector means after the end of connection of the signal line with the ground line. SOLUTION: At the start of connection between on endoscope side connector part and a unit side connector part, the conduction of both power lines SPL, UPL, the conduction of a all of both signal lines SSL, USL and the conduction of both ground lines SGL, UGL are obtained but the conduction of feeding control lines SCL, UCL cannot be obtained. When a short pin socket 36S and a short connector pin 42S are connected last and the feeding control lines SCL, UCL are conducted, the voltage having been applied to a base electrode of a transistor(TR) is decreased down to zero volt, and an emitter electrode and a collector electrode of the TR becomes conductive. Thus, the power line SPL at the scope side receives power for the first time.
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