| 摘要 |
PROBLEM TO BE SOLVED: To provide an endoscope which can perform a good observation for a long time period by preventing the reduction of the illumination light amount and the generation of image noises from occurring by heat emitted from an LED illumination which is arranged on the distal end of the insertion part. SOLUTION: For this endoscope, an LED illumination part 7 for which an LED chip 6 is arranged and an observation optical unit 10 are provided on the distal end part 3. The distal end part 3 is mainly constituted of an object receiver 11, an LED substrate 12, a lens frame receiver 13, a first connecting tube 14, a second connecting tube 15, a cover glass 16 and a connecting-fixing member 17. The object receiver 11 and the LED substrate 12 are formed of a metal member of which the thermal conductivity is high. In a through hole 11c for arranging a radiation member which is formed around a recess 11b of the object receiver 11, the distal end of a bundled wire member 21 having a high thermal conductivity which radiates heat generated from the LED chip 6 is arranged. The proximal end of the bundled wire member 21 is arranged in a flexible tube 5. The bundled wire member 21 is formed by bundling a plurality of strands 21a of which the strand diameter is 0.1 mm or lower while taking flexibility under consideration. COPYRIGHT: (C)2004,JPO&NCIPI
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