Patent ID: 6949040

Claim:
A bicycle rear derailleur for shifting a chain of a bicycle comprising: a base member arranged and configured to be coupled to a frame of the bicycle; a link mechanism coupled at one end thereof to said base member; a movable member coupled to the other end of said link mechanism; outer and inner plate members movably coupled to said movable member, said outer and inner plate members having external peripheral edges defining overall shapes of said outer and inner plate members; a guide pulley freely rotatably supported between said outer and inner plate members; and a tension pulley freely rotatably supported between said outer and inner plate members, at least one of said outer and inner plate members including a bent portion integrally formed with said at least one of said outer and inner plate members to prevent said chain from disengaging from at least one of said tension pulley and said guide pulley, said bent portion being formed by bending an inner section of said at least one of outer and inner plate members in a direction towards the other of said at least one of said outer and inner plate members, said inner section extending from an inner periphery of a cutout section of said at least one of said outer and inner plate members.