| 摘要 |
PURPOSE:To prevent the goint-out of flame due to the throttle of the gas volume by providing a rotation restraining means which restrains the rotational operation to rotate an operation button to the small fire area by means of a contact member and forming in the rotation restraining means an inclining cam face which allows the rotational operation of the operation button by guiding the rotation restraining means in the direction in which the rotation button is pushed in. CONSTITUTION:A rotation restraining means b is provided which restrains the rotational operation of an operation button 1 to the area (d) of small fire by means of a contact member (a). In the rotation restraining means b an inclining cam face c is formed which allows the rotational operation of the rotation button 1 by guiding the operation button 1 in the direction in which the operation button 1 is pushed in. When the operation button 1 is rotated to the area (d) of small fire, the operation button 1 hits a contact member (a) in the area (d) of small fire and the series of operation of the operation button 1 are restrained, and after this in the operation of the operational button 1 it is guided by an inclining cam C in the rotation restraining means (b) and moves in the direction in which the operation button 1 is pushed in and the operation to the area (d) of small fire is made as specified. With this arrangement the rotational operation of the operation button 1 is restrained from rotating at once to the area (d) of small fire so that the extinguishing of the fire due to the state of the air-richness by temporary air in excess caused by throttling the gas volume suddenly can be prevented. |
