| 摘要 |
PURPOSE:To arrange so as to easily obtain a controlled flow through a simple constitution by making a valve body a V shape where two small elastic pieces made of rubber or the like are made to face each other. CONSTITUTION:At a cylindrical main body 10 are axially provided penetrating holes which constitute a flow passage. An opening end 12 extends out with its outer perimeter diameter smaller than that of the main body 10 and at the same time, has an outer perimeter surface which is a tapered surface tapering off toward the tip. Also, a needle 20 is to advance/retreat freely in the flow passage of the main body 10 by means of a regulating nut 22. And penetrating holes 30 are provided at the side-surface of the needle 20. Also, a valve body 32 made of elastic rubber is inserted into the inner bottom surface of the flow passage portion 29 of the needle 20. This valve body 32 has thin small pieces 32a, 32b which are made to face each other in a V shape toward the tip from the base portion. When an air current flows in the direction of arrow marks a, the small pieces of the valve body 32 are deformed elastically and the current flows out as a free current, but a current in the direction of arrow marks b is deterred by means of small pieces 32a, 32b.
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