PROBLEM TO BE SOLVED: To provide a mounted device for an endoscope which maintains flexibility and elasticity of an insertion portion of an endoscope and is capable of causing a bending portion to bend smoothly.SOLUTION: A transmission portion for transmitting power from a power source to a rotary body 34 and driving the rotary body 34, is divided front and back into a first transmission portion 11a and a second transmission portion 11b, and the transmission portions are connected by a three-layered coil spring 52 for connection. The power from the power source is transmitted to the second transmission portion 11b, and then transmitted to the first transmission portion through the three-layered coil spring 52. The three-layered coil spring 52 has flexibility and elasticity to bend together with the bending portion 20, so that the first transmission portion 11a and the second transmission portion 11b follow the bending of the bending portion 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】動力源からの動力を回転体34に伝達して回転体34を駆動する伝達部を前後に分割して第1伝達部11aと第2伝達部11bとし、これらを連結用三層コイルバネ52で連結する。動力源からの動力は、第2伝達部11bに伝達された後、連結用三層コイルバネ52を介して第1伝達部11bへ伝達される。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1伝達部11aと第2伝達部11bとが湾曲部20の湾曲に追従する。【選択図】図4
