| 摘要 |
PROBLEM TO BE SOLVED: To enhance sealing property when an air passage is closed in an air passage opening/closing device having a seat surface formed by a plurality of divided seat surfaces. SOLUTION: When an air passage opening/closing door 14 closes an air passage, when a surface including a contact line that a seal member 14c of the air passage opening/closing door 14 and the seat surface 11a of a case 11 are contacted is made to an assumed seal surface S, the first and second divided seat surfaces 12a, 13a formed on first and second division members 12, 13 are inclined so as to be crossed to the assumed seal surface S. Further, a contact end part of the seal member 14c contacted with the seat surface 11a when the air passage is closed is extending in a direction parallel to the assumed seal surface S from a door body part 14b to an intersection line of the seat surface 11a and the assumed seal surface S. Thereby, the contact end part of the seal member 14c is certainly brought into contact with the seat surface 11a to enhance the sealing property. COPYRIGHT: (C)2009,JPO&INPIT
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