| 摘要 |
PROBLEM TO BE SOLVED: To enable the smooth movements of a connecting rod along its axis 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 rockably 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 connecting rod 70 is made of a Duracon (R) resin, and a bearing 72 is made of brass. The outer circumferential surface of a bearing main body is a cone, and the bearing main body is elastically fitted into the mounting hole of a sleeve 71 made of a synthetic resin and is positioned by a stopper.
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