Abstract: A tensioning device for a roller blind including a tube assembly about which a retractable screen is wound, the tube assembly housing an internal spring configured to be tensioned to provide for the extension and retraction of the screen, the internal spring being operably connected to a drive receiver positioned at one end of the tube assembly, the drive receiver being configured to rotate to adjust tension in the spring, the tensioning device including: a drive assembly configured to connect with and impart rotation to the drive receiver to adjust tension in the spring, a spring lock adapted to selectively prevent rotation of the tube assembly and tensioning device relative to one another, a mounting lock adapted to releasably secure the tensioning device to a wall mounting bracket, and an actuator adapted to actuate the spring lock and the mounting lock, the actuator being moveable between first and second positions.

Abstract: A winder for a blind system, comprising a drive member rotatable in a drive direction and a free direction; a driven member to engage a blind cylinder; a transmission mechanism to selectively transmit rotation of the drive member to the driven member, the transmission mechanism including an intermediate transmission member and an intermediate resistor to provide resistance to rotation of the intermediate transmission member, wherein the transmission mechanism has a drive state when the drive member is rotated in the drive direction to overcome the resistance of the intermediate resistor and transmit rotation of the drive member through the intermediate transmission member to the driven member, and a free state when the drive member is rotated in the free direction, wherein transmission is broken between the drive member and the intermediate transmission member and intermediate resistor.

Abstract: A winder for a blind system, comprising a drive member rotatable in a drive direction and a free direction; a driven member to engage a blind cylinder; a transmission mechanism to selectively transmit rotation of the drive member to the driven member, the transmission mechanism including an intermediate transmission member and an intermediate resistor to provide resistance to rotation of the intermediate transmission member, wherein the transmission mechanism has a drive state when the drive member is rotated in the drive direction to overcome the resistance of the intermediate resistor and transmit rotation of the drive member through the intermediate transmission member to the driven member, and a free state when the drive member is rotated in the free direction, wherein transmission is broken between the drive member and the intermediate transmission member and intermediate resistor.