| 摘要 |
PURPOSE:To secure the sectional area of ventilation flue yet larger, by making up an annular seal member into a taper form, in case of a structure sealing an interspace between coupling cylinders for both air outlets of a defroster grill and a defroster duct with the annular seal member. CONSTITUTION:A defroster grill 2 to be installed frontward in an instrument panel in front of a driver seat in a vehicle is provided with a slitilike air outlet 8 extending over in a car breadth direction, while an air outlet coupling cylinder 10 for duct use is extendedly set up toward the downside. This coupling cylinder 10 is connected with a defroster duct (unillustrated herein) via another coupling cylinder 13, while an interspace between both coupling cylinders 10 and 13 is externally fitted in by the coupling cylinder 10 and sealed up by an annular member 20 whose lower end part is pressed down to a seal receiving part 15 at the upper end of the coupling cylinder 13. In this case, the annular seal member 20 is formed by the way of installing a taper part 21, which becomes thinner in thickness by degress as it goes toward the end part, on the inner circumferential surface of parts other than the externally fitting part to the coupling cylinder 10. |
