PROBLEM TO BE SOLVED: To enable piping members of complicated shape to be water-tightly joined by laser welding without using complicated devices.SOLUTION: The connection method of the piping members of an endoscope according to one embodiment of the present invention includes: a sealing step in which the respective metal connection parts of a first piping member and a second piping member are bonded with a sealing layer and the ducts formed in the first piping member and the second piping member are communicated and a welding step in which at least a part of the connection part formed in the sealing step is irradiated with a laser beam and the first piping member and the second piping member are welded.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2017,JPO&INPIT【課題】複雑な装置を使用せずに、複雑な形状の配管部材をレーザ溶接によって水密に接合することを可能にする。【解決手段】本発明の一実施形態に係る内視鏡の配管部材の接続方法は、それぞれ金属製の第1配管部材の接続部と第2配管部材の接続部とを封止層を介して接合させ、第1配管部材及び第2配管部材にそれぞれ形成された管路を連絡させる封止ステップと、封止ステップによって形成された接合部の少なくとも一部にレーザビームを照射して、第1配管部材と第2配管部材とを溶接する溶接ステップと、を含む。【選択図】図2
