| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve reliability of a device by using an O-ring for holding the air-tightness to an air-intake pipe for preventing drop of a sub-air channel. SOLUTION: A sub-air channel 10 is provided with an O-ring grove 19, with notches at various points. A protrusion 18 so formed as to fit with the notch of the sub-air channel 10 is formed on a housing 1 side. Thus the O-ring groove 19 comprises the housing 1 and the sub-air channel 10 in combination, and the surface of the sub-air channel 10 and that of the housing 1 side are held and fixed with a bonding agent, etc. Further, with the O-ring 6 attached, it engages with the protrusion 18 on the housing 1 side, thus the O-ring 6 itself acting as a stopper, so even if a bonding agent releases itself, the sub-air channel 10 is prevented from dropping off the housing member 1.</p> |
