| 摘要 |
<P>PROBLEM TO BE SOLVED: To stably retain in a state where an observation unit is mounted on a distal hard portion, and to easily remove without interfering with a connection pipe. <P>SOLUTION: A mounting hole for mounting an observation unit 20 on a distal end body 4 which constitutes a distal portion 2c is formed. The mounting hole 40 is formed with a first holding portion 41 into which the distal portion of the lens barrel 21 is inserted, a second holding portion 43 into which a prism holder 22 is inserted, and a releasing portion 42 having a space larger than the external diameter of the lens barrel 21 between the first and second holding portions 41, 43. <P>COPYRIGHT: (C)2012,JPO&INPIT |
