| 摘要 |
PURPOSE:To prevent treatment upon ignition and generation of soot and improve endurance by a method wherein an ignition heater is located to the ignition vicinal position of a combustion wick upon combustion wick ignition and upon uncombustion, while heat-sensitive expansion and contraction member for switching is provided to the separating receding position of the combustion wick upon combustion wick combustion. CONSTITUTION:The circumferential temperature of a coil spring made of shape memorizing alloy (after, SMA) is low upon the ignition, therefore, the ignition heater 4 is located to the combustion wick ignition vicinal position by tension of a compression spring B and it ignites for a combustion wick 7 with heat thereof. In case the circumferential temperature of the SMA coil spring 8 becomes high during combustion, restoring force of the SMA coil spring 8 overcomes against the tension of the compression spring B and a control screw rod 15 is pulled toward the SMA coil spring, therefore, the ignition device 2 is fluctuated around a side axis with the fulcrum of an outer peripheral rim at a socket engaging hole 1b of a wick outer cylinder 1 and it may be put to the combustion wick separating receding position.
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