| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain a pilot nozzle in which a needle can slide again even when the needle adheres to an ejection opening by providing a needle coupled with a diaphragm while being urged in the direction of the ejection opening to be inserted into the ejection opening and removed therefrom freely thereby preventing the ejection opening from being clogged. SOLUTION: A needle 13 is inserted into an ejection opening 10a to penetrate a diaphragm 15 perpendicularly and to pass through a plunger opening and fitted to one end of a plunger 12 extending to the outside of a cover member 9. When gas is not introduced into a gas chamber 8a, a compression spring 14 urges the diaphragm 15 in the direction of an arrow (a) and the needle 13 is inserted into the ejection opening 10a. When a pilot flame is ignited, gas is introduced into the gas chamber 8a. Consequently, pressure in the gas chamber 8a increases to press the diaphragm 15 and move the diaphragm 15 while resisting against the spring force of the compression spring 14.</p> |
