Sunshade assembly

A sunshade assembly adapted to be used on a sunroof of a vehicle, comprising:

• a pair of spaced-apart rails each having opposite front and rear ends, and each formed with a track therealong;
• a roller unit spaced apart from said front end of each of said rails, and including an inner tube member and an outer tube member rotatably sleeved on said inner tube member;
• a screen having a fixed end secured to said outer tube member, a free end opposite to said fixed end, and opposite peripheral edge portions each extending into said track of a respective one of said rails;
• a position-retaining unit including an annular spool defining a center space and disposed on one end of said outer tube member,
• a rope extending along one of said rails, looped around said rear end of one of said rails, and passed through said track in one of said rails, said rope having a first end secured to said spool and a second end secured to said free end of said screen, and
• a spiral spring disposed in said center space of said spool, and having an inner end connected to said one end of said outer tube member and an outer end connected to said spool;
• and
• wherein said inner tube member has a curved shape, and said outer tube member of said roller unit includes a plurality of first sections sequentially linked to one another to rotate in unison, and a pair of second sections linked respectively to outermost ones of said first sections to rotate together therewith, said first and second sections being pivotable relative to each other in a vertical direction,
• said annular spool being disposed on one of said second sections of said outer tube member, said inner end of said spiral spring being connected to said one of said second sections of said outer tube member.