Patent ID: 8418741

Claim:
A roller blind device, comprising a special curtain ( 20 ), wherein, said roller blind device also comprises a first circular tube ( 1 ) for fixing an upper end of said special curtain ( 20 ) and a second circular tube ( 39 ) for fixing an lower end of said special curtain ( 20 ); a torsion spiral ( 37 ) which is capable of rolling up said special curtain ( 20 ) and a stop element ( 10 ) for stopping a lifting of said second circular tube ( 39 ) are arranged in said second circular tube ( 39 ); wherein said roller blind device comprises an iron baffle ( 51 ), on both ends of which a first connection plate ( 491 ) of “Z” shape of a left flexing iron plate ( 49 ) and a second connection plate ( 501 ) of “Z” shape of a right flexing iron plate ( 50 ) are fixed; an included angle between said first connection plate ( 491 ) and a first bending plate ( 492 ) connected together is a right angle, an included angle between said first bending plate ( 492 ) and a third connection plate ( 493 ) connected together is a right angle, an included angle between said second connection plate ( 501 ) and a second bending plate ( 502 ) connected together is a right angle, and an included angle between said second bending plate ( 502 ) and a fourth connection plate ( 503 ) connected together is a right angle; said right flexing iron plate ( 50 ) is a minor of said left flexing iron plate ( 49 ), and two circular iron shafts ( 36 ) are fixed symmetrically on said first bending plate ( 492 ) and said second bending plate ( 502 ).