| 摘要 |
PROBLEM TO BE SOLVED: To surely perform driving operation by enhancing stability of ignition of an ignition plug in view of that an insulation part of a conventional ignition plug is made of a nylon material, the insulation performance is deteriorated at a high temperature, and leakage of current occurs, and there is a risk that ignition is not securely performed in a combustion type driving tool operated by combusting combustible gas. SOLUTION: The plug insulation part 52 is made of PPS or PBT as a raw material, thereby maintaining the insulating performance at least of 12 kV/mm at 100°C. Alternatively, a creeping distance B of the plug insulation part 52 is set to be at least 1.5 times of a plug gap A. COPYRIGHT: (C)2009,JPO&INPIT
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