Shielding device for a vehicle by means of a curtain including an unlocking means

The device (7) has two arms (13, 13') that are assembled on a rolling support (9) along which a curtain (11) is to be guided between a deployed position and a rolled position. A set of retaining units e.g. pins (31, 31'), is located on the arms and a draw bar (17) to maintain the curtain in the deployed position. A set of unlocking units unlocks the bar and exerts opposing forces on the arms and the bar. The unlocking units are oriented along a direction of the bar to move away the retaining units so as to allow rolling of the curtain.