| 摘要 |
PROBLEM TO BE SOLVED: To facilitate the manufacture of a connecting rod to which a valve body is mounted in a pressure fluctuation removing means. SOLUTION: The gas channel of a gas meter main body is provided with a pressure fluctuation removing means 37 along the passage of gas and a fluidics flowmeter in this order. One end part 112 of a connecting rod 70 is mounted to a valve body 42, which can be seated on a valve seat 82, and the other end part is connected to a diaphragm 43. The diaphragm 43 brings the valve body 42 close to the valve seat 82 as the differential pressure between pressure upstream from a valve hole 41 and pressure on the side of a discharge opening of gas is reduced. The one end part 112 of the connecting rod 70 is mounted by inserting it through the through hole of a mounting tube part formed in the bottom of a tubular body. The one end part 112 of the connecting rod 70 inserted through the valve body 42 is in the shape of a right circular cylinder to eliminate both the need for dividing a metal mold for injection molding orthogonally to the axis of the connecting rod 70 and the possibility of the occurrence of burrs.
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