Roller Blind type Sheet and Blanket Dispenser

The nightime minimum temperature here has been all over the place this last week. There has been as much as a 15C difference in the lowest temperature from one night to the next. We have a sheet, a blanket and a duvet and use whichever combo most suits the conditions du jour. (du nuit?)

The problem is sometimes we want just the blanket, sometimes just the duvet, sometimes both and occasionally, on very warm nights, just the sheet alone. We do the usual shuffling of bed linen but the non-used bedding either impedes the use of the other stuff or just ends up slumped on the floor.

My solution is to have a large blanket-box type piece of furniture at the foot of the bed with a selection of 4 types of bedding each rolled up on a rollerblind like device. Make your selection of whichever combo most suits the night's temperature, pull it up over you and then click a locking mechanism into place to stop it from rolling back into the box.

Each sheet or blanket would attach to the rollerblind with a safe clamping mechanism to allow simple removal for laundering. Just NEVER let the rollerblind spring mechanism wind back up without first attaching a new sheet.