| 摘要 |
PROBLEM TO BE SOLVED: To provide an endoscope system capable of cooling a photoelectric conversion element mounted in an insertion part while inhibiting increase of the size of the outer diameter of the insertion part. SOLUTION: The endoscope system comprises the slender insertion part; the photoelectric conversion element mounted at the distal end of the insertion part; a water feeding channel disposed in the insertion part and having a water feeding port opened at the distal end of the insertion part; a heat radiation part connected to a position on the way of the water feeding channel and disposed in such a way as heat-exchangeable with the photoelectric conversion element; and a water feeding direction switching means for switching the direction of feeding cooling water fed through the water feeding channel either to the water feeding port side or to the heat radiation part side. COPYRIGHT: (C)2009,JPO&INPIT
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