| 摘要 |
PROBLEM TO BE SOLVED: To provide a membrane type gas meter with which it is possible to reduce the number of components.SOLUTION: The present invention provides a membrane type gas meter comprising an upper case forming an inflow port for a fluid to be measured and an outflow port for the fluid to be measured, a lower case forming a pair of measurement chambers partitioned by a membrane part which reciprocates under the pressure of the fluid to be measured that flows into the upper case, and a crank mechanism part for converting the reciprocating motion of the membrane part to a rotary motion via the link mechanism part, the crank mechanism part having a rotary shaft part, a crank base for rotatably supporting the rotary shaft part, and a crank part fixed to the upper end of the rotary shaft part and revolving around the shaft center of the rotary shaft part via the link mechanism part, wherein the crank base has a body part formed in a cylindrical shape and which the rotary shaft part is rotatably fitted into, and a fitting part integrally provided on the outer circumferential surface of the body part.SELECTED DRAWING: Figure 3 |
