| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To reduce the diameter of an insertion section in an endoscope, while protecting an imaging element and a signal cable from disturbance noise. <P>SOLUTION: An observation window 30 and a forceps outlet 33 are arranged on the end surface of a distal end 17a constituting the insertion section of the endoscope. An objective optical system 35, a prism 36, and a CCD 37 are arranged in the depth part of the observation window 30. The CCD 37 is connected to a circuit board 45, and the signal cable 49 is connected to the input/output terminal 48 of the circuit board 45. The forceps outlet 33 communicates with a forceps channel 23. The forceps channel 23 includes: a metal tube 41 to be fixed to the distal end 17a; and a resin tube 42 to be connected to the metal tube 41. The resin tube 42 is coated with a metallic plating layer 43. The metallic plating layer 43 is grounded, shields the inside of resin tube 42 when a high frequency knife, etc., is inserted to the forceps channel 23, and then, protects the CCD 37 and the signal cable 49. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
