| 摘要 |
PROBLEM TO BE SOLVED: To further reduce thickness by suppressing interference with an auxiliary fin when a main fin is tilted.SOLUTION: In an interlocking mechanism 60, when a main fin is arranged in parallel with a second wall part, both auxiliary fins 33 and 35 are arranged in parallel with the second wall part by positioning transmission shafts 63 and 65 for the auxiliary fins 33 and 35 in a boundary between first holes 68A and 69A of cam holes 68 and 69 and second holes 68B and 69B in a cam member 66. In addition, when the main fin is tilted from the above state, the auxiliary fin 33 on a side near the upstream end of the main fin is maintained in parallel with the second wall part by positioning the transmission shaft 63 of the auxiliary fin 33 at the first hole 68A. The auxiliary fin 35 on a far side from the upstream side is tilted against the second wall part so that the downstream end of the auxiliary fin 35 is pushed out toward the inside of a ventilation path by positioning the transmission shaft 65 of the auxiliary fin 35 at the second hole 69B. |
