| 摘要 |
PROBLEM TO BE SOLVED: To solve problems in a conventional fire power adjusting device wherein a fire power adjusting mechanism is mounted on a rotating shaft rotated by a motor, a cam member is fixed to the rotating shaft, and a solenoid safety valve is forcibly opened by a rod pressed by the cam member, that the solenoid safety valve is pressed by the rod in a fire power adjusting range and is not closed so far as the rod is pressed at a position excluding the fire power adjusting range, thus the ignition must be implemented in a high heat state, which causes undesired generation of explosive sound, and rise of large flame. SOLUTION: An engagement projection 51 is engaged with a cam member 6 to rotate the cam member 6. A clearance 63 is formed between a first engagement portion 62 kept into contact with the engagement projection in normal rotation and a second engagement portion 64 kept into contact with the same in reverse rotation, so that the reverse rotation amount of the cam member 6 can be reduced, when the engagement projection 51 is rotated reversely. COPYRIGHT: (C)2006,JPO&NCIPI
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