| 摘要 |
The present invention provides a control drum, such as a tilt drum for a Venetian blind, with adjustable friction elements (such as spring legs), so that the friction between the control drum and the control shaft (e.g., tilt rod), can be greatly reduced during installation and then can be greatly increased once the drum has been installed on the control shaft. The present invention accordingly permits easy installation without sacrificing the benefits of an interference fit between the control drum and control shaft.
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