Patent ID: 7121315

Claim:
A sunshade for detachably mounting at a window frame of a vehicle having first to fourth edges to define first to fourth corners and first to fourth interior angles respectively, comprising: a fabric shelter which is adapted for sheltering a window of said window frame to block heat radiation of sunlight from entering into said vehicle through said window frame, wherein said fabric shelter is made of material adapted to be seen through from one side of said fabric shelter to another side thereof, and a quadrilateral shaped retention frame comprising four retention arms and first to fourth resilient cornering holders to form a loop boundary having a dimension corresponding to said window frame of said vehicle, wherein a peripheral edge of said fabric shelter is mounted to said retention arms within said loop boundary, wherein a first attachment angle of said first resilient cornering holder is larger than said corresponding first interior angle of said first corner of said window frame, wherein a second attachment angle of said second resilient cornering holder is smaller than said corresponding second interior angle of said second corner of said window frame, wherein a third attachment angle of said first resilient cornering holder, which is diagonally positioned to said first resilient cornering holder, is larger than said corresponding third interior angle of said third corner of said window frame, wherein a fourth attachment angle of said fourth resilient cornering holder, which is diagonally positioned to said second resilient cornering holder, is smaller than said corresponding fourth interior angle of said fourth corner of said window frame, wherein a shape of said retention frame is adapted to be deformed via said first to fourth resilient cornering holders until said first to fourth attachment angles match with said first to fourth interior angles of said window frame respectively; wherein said retention frame is adapted for detachably mounting to said window frame at a position that said four retention arms are biasing against said first to fourth edges of said window frame respectively not only by an urging force from said resilient cornering holders but also by deformation of said shape of said retention frame, so as to support said fabric shelter within said window frame in a tension manner while said side window thereof is allowed to be normally operated.