| 摘要 |
An ignition device wherein a gas jet-out nozzle (26) is provided at the forward end of an extension projecting in a rod form from a valve mechanism (8) for on-off controlling the gas, and a discharge electrode (32) is provided in the vicinity of this jet-out nozzle (26) to thereby perform ignition through discharge. A nozzle cover (30) made of an insulating material is provided on the outer peripheral portion of the jet-out nozzle (26), a front wall (31a) extending toward the center is formed at a position farther forward than the forward end of the jet-out nozzle, and this front wall (31a) has an opened portion in which a portion forwardly of the jet-out nozzle (26) and another portion upward of the jet-out nozzle (26) on the side of the discharge electrode (32) are removed. With this arrangement, foreign materials are prevented from adhering to the jet-out nozzle and satisfactory ignition property and combustion characteristics can be secured against wind. |
