| 摘要 |
PROBLEM TO BE SOLVED: To ensure the high dimension accuracy by providing a constitution assembled without use of a dedicated jig and stably applying a solder when a blade and a blade shaft are fixed in a diaphragm type gas meter. SOLUTION: The blade shaft 2 is inserted into an inner space of a curved engagement wall 31 when the blade 3 and the blade shaft 2 are assembled, and simultaneously abuts on first and second regulating walls 32, 33. The first and second regulating walls 32, 33 are constituted so as to dispose the blade shaft 2 in a predetermined position of the blade 3 when the blade shaft 2 abuts on the first and second regulating walls 32, 33. A distance L between the center of a shaft passage hole 34 and the center of the blade shaft 2 can be accurately configured. An inside radius R of the engagement wall 31 is configured so as to be larger than a radius of the blade shaft 2. A fixed gap is obtained between the engagement wall 31 and the blade shaft 2. The solder can stably run into the gap. COPYRIGHT: (C)2010,JPO&INPIT
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