Device for adjustable pre-loading of elastic means...

Details Device for adjustable pre-loading of elastic means... Device for adjustable pre-loading of elastic means...

E - Fixed Constructions

06

B

160/27

E06B 9/08 (2006.01) E06B 9/60 (2006.01)

Patent

CA 2016476

A plate for closing one end of a box for housing a window shade roller, includes a cylindrical recess made in the plate coaxially to a through hole and into which a bushing is placed. The bushing is provided with an axial hole having a polygonal cross section and two strikers suited to fit into corresponding notches in the recess. A spring placed inside the recess on a collar integral with the bushing, locks the strikers and notches and prevents axial rotation of the bushing. A washer fastened to the plate closes the recess. A non-round tang extending from one end of a roller can engage the hole in the bushing. Axially pushing on the bushing while rotating the bushing achieves the release of the strikers from the notches, and allows adjusting of the loading of the window shade roller by rotating the tang.

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