| 摘要 |
PURPOSE:To simply and unfailingly couple both ducts together in the case of coupling via a coupling the air-conditioning duct located inside an instrument panel and the duct located inside a door trim, by sandwitching between the opening hole of the panel and the air-conditioning duct the end portion of a joint which is capable of being expanded and contracted in its axial direction. CONSTITUTION:An air-conditioning duct 7' disposed inside an instrument panel 1 is coupled with a duct 9 disposed inside a door trim 8, via a coupling 10. In this case, the air-conditioning duct 7' has craw-shaped protrusions 11 formed on the respective outer peripheral faces of its end portions 7a the opening ends 7b of which are bent inwards. The coupling 10 has end portions 10a which the bellows-shapedly formed, and recessed portions 10b which are formed on the respective inner peripheral faces of the end portions and are adapted to be engaged with respective protrusions 11, and also the opening ends of the end portions are so formed as to rise outwards. And the opening ends of the end portions of the coupling 10 are sandwitched between the opening hole 5a through the instrument panel 1 and the opening ends 7b of the air-conditioning duct 7'. |
