| 摘要 |
PROBLEM TO BE SOLVED: To provide a tightening structure of a member capable of reducing assembly man-hour and the number of parts. SOLUTION: An air flowmeter is inserted into a hole 5a in a cylindrical part 5 of an air suction pipe 2, is pressed down, and is rotated to move each recessed part 4a in a fixed part 4 to positions of a cantilever support part 9 of each engaging part 7. When the air flow meter is released, the fixed part 4 is pushed up by elastic force of an O ring 6 pressed against an inner peripheral wall of the hole 5a of the cylindrical part 5, and each recessed part 4a of the fixed part 4 is fitted in projecting parts 9a of each cantilever support part 9. As a result, the air flowmeter and the air suction pipe 2 are tightened while air-tightness between the air flowmeter and the air suction pipe 2 is kept by the O ring 6.
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