| 摘要 |
PROBLEM TO BE SOLVED: To improve the positioning accuracy of an air mix door and to exhibit superior performance for a long time by floatingly supporting at least one rotational support member tensioning drive cords in the direction applying the tension to the drive cords via an elastic member. SOLUTION: Wires 11, 12 as drive cords for driving an air mix door 10 are connected to the air mix door 10. The wires 11, 12 are tensioned to rotational support members 13, 14. The support member 13 is provided with pulleys 15, 16 and the support member 14 is provided with pulleys 17, 18. The wire 11 is laid across the pulleys 15, 17 and the wire 12 is laid across the pulleys 16, 18. The rotatable support member 4 is floatingly supported in the direction applying the tension to the wires 11, 12 via the elastic member.
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