| 摘要 |
The invention relates to a plug (10) for releasable engagement with the centre-pin of a roller blind control unit wherein engagement of the plug with the pin ensures that a tip of the centre-pin engages an external surface of the control unit. In addition, a releasably inter-engaging combination of this plug and centre-pin wherein insertion of the centre-pin through a roller blind control unit and engagement with the plug, ensures that a tip of the centre-pin engages an external surface of the control unit is described. The invention also relates to a control unit for use in a window blind head rail assembly comprising: a sprocket wheel, a sprocket support and wrap spring, a splined bush for engagement with a roller blind tube, a centre-pin, and a plug for releasable engagement with the centre-pin. |
