PROBLEM TO BE SOLVED: To provide an endoscope mounting fixture by which the flexibility of the insertion part of an endoscope is maintained, and the bending operation of the bend is made to be performed smoothly.SOLUTION: A first propulsion section 11a and a second propulsion section 11b are connected by a three-layer coil spring 52 for connecting. When a worm gear 44 rotates at the second propulsion section 11b, the three-layer coil spring 52 for connecting integrally rotates, and the worm gear 44 of the first propulsion section 11a is also rotated collectively. Since the torque of the worm gear 44 of the second propulsion section 11b is transmitted by the three-layer coil spring 52 for connecting, the torque can be efficiently transmitted to the worm gear 44 of the first propulsion section 11a. Moreover, since the three-layer coil spring 52 for connecting bends with the bend 20 by the flexibility, the first propulsion section 11a and the second propulsion section 11b follow the bending of the bend 20.COPYRIGHT: (C)2012,JPO&INPIT【課題】内視鏡の挿入部の可撓性を維持し、湾曲部の湾曲動作を円滑に行わせる。【解決手段】第一推進部11aと第二推進部11bとを連結用三層コイルバネ52で連結する。第二推進部11bでウォームギア44が回転すると連結用三層コイルバネ52が一体に回転し、第一推進部11aのウォームギア44も併せて回転する。第二推進部11bのウォームギア44の回転力を連結用三層コイルバネ52によって伝達しているため、第一推進部11aのウォームギア44に対して効率良く回転力を伝達できる。また、連結用三層コイルバネ52がその可撓性によって湾曲部20とともに湾曲するので、第一推進部11aと第二推進部11bとが湾曲部20の湾曲に追従する。【選択図】図4
