| 摘要 |
PROBLEM TO BE SOLVED: To provide an air passage opening/closing device for opening/closing an air passage by reciprocating a film shaped member having flexibility capable of preventing failure caused by a flash generated in a peripheral edge part of a hole part opening on the film shaped member. SOLUTION: The film shaped member 15 having the flexibility for opening/ closing the air passage 23 is provided. The film shaped member 15 includes gear hole parts 15a, 15b with the flash 15c generated on the peripheral edge part. A case 1 is provided with a sliding surface 21 for sliding the film shaped member 15. A recessed part 25 for preventing contact of the flash 15c is formed on the sliding surface 21. Thereby, even when the flash 15c is projected from the peripheral edge part of the gear hole parts 15a, 15b of the film shaped member 15, the contact between the flash 15c and the sliding surface 21 can be prevented.
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