| 摘要 |
A slip clutch for a roller blind. The slip clutch comprises a clutch base with a shaft portion, a drive sprocket including a drive tube and rotationally mounted on the clutch base, at least one clutch spring and a roller tube connector. The clutch spring is in the form of a coil spring frictionally engaged about the shaft portion and positioned between the shaft portion and the drive tube. The spring includes end members that engage the drive tube such that rotation of the drive tube about the shaft portion is resisted by the frictional engagement of the spring about the shaft. Rotation of the drive tube in either direction causes the drive tube to apply a force to the clutch spring in a direction such that encourages an increase in the diameter of the spring to reduce the frictional engagement of the clutch spring with the shaft portion. |
