| 摘要 |
PROBLEM TO BE SOLVED: To satisfactorily develop the self-sealing ability of a film member 29 in an air passage select device using a film type slide door 27. SOLUTION: The slide door 27 comprises the flexible film member 29 closing air passages 22 and 23 by pressingly fitting to the peripheral edge seal faces 22a and 23a of the air passages 22 and 23 and door base plates 28 having opening parts 28a acting an air pressure on the film member 29. The film member 29 is slightly bent in a chevron shape to the peripheral edge seal faces 22a and 23a at one or a plurality of positions parallel generally with the center line of a lateral direction to a sliding direction C orthogonal to the sliding direction B. Thus, even if a specific seal part is not used, the self-seal performance of the film member 29 can be satisfactorily developed since the film member 29 is so formed as to fit the peripheral edge seal faces 22a and 23a formed in the chevron shape which forms the draft of the case.
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