| 摘要 |
PROBLEM TO BE SOLVED: To perform satisfactory soldering by always spouting out uniformly an inert gas around a tip part and rendering a soldering portion oxygen-free, and to facilitate assembling, disassembling, maintenance and check. SOLUTION: A spacer 20 is fixed to the holder part 13 of a soldering iron main body 11 and on the tip side of a heater 21 inserted through the spacer 20, a soldering iron tip 22 is fixed. On the outside of the soldering iron tip 22 and the spacer 20, a protective cover 23 is provided leaving an annular gap e, and a spacer ring 26 fits with the tip part of the protective cover 23 and the barrel part 22a of the soldering iron tip 22. A ventilation groove (gas path) 30 is provided on the space ring 26, which makes the tapered hole 28 of the spacer ring communicate with the annular gap e. When performing soldering working, the inert gas induced into the inside of the soldering iron main body 11, is spouted out around the tip 22c of the tip of the soldering iron 22 through the annular gap e, the ventilation groove 30 and an annular space f.
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