Secure multi-positions locking device for a rear seat back of a motor vehicle.

The invention relates to a device for locking a folding backrest, comprising a lock connected to said backrest and a keeper housed in a housing connected to the vehicle structure (130) and comprising a plate (121) having a light (122). ) traversed by a guide member (131) integral with said housing (130), said plate (121) being extended by a fastening member (123) intended to engage with a bolt of said latch; said striker being adapted, while remaining in engagement with said latch, to slide in said housing (130) in a predetermined stroke and to be locked thereon in a plurality of positions, a portion of said lumen (122) projecting from said housing (130); ) on a part of said race; said device further comprising anti-pinch protection means comprising a bellows (140) extending in front of said housing (130) and arranged to continuously surround said projecting portion.