Patent ID: 6193600
Filing Date: 2001-02-27
Classification: B60H

Abstract:
An air passage switching system comprising:a case for forming an air passage through which air flows, said air passage having an opening;a door disposed in the case, for opening and closing said opening, said door includinga door body made of a material having a rigidity higher than a predetermined value, anda seal member made of an elastic material having a heat shrinkage and being attached to an outer peripheral portion of said door body, said seal member continuously extending from the outer peripheral portion of said door body toward an outer side to have a thin plate-like shape, wherein:said case has a case seal surface around said opening;said seal member of said door is press-fitted to said case seal surface to have a predetermined deformation amount when said opening is closed;said seal member has inner stress generated during molding; andsaid seal member and said case seal surface are provided in such a manner that the predetermined deformation amount of said seal member when said seal member is press-fitted to said case seal surface is made larger than a deformation amount of said seal member due to the inner stress.