Foldable seat with automatic unlocking for an motor vehicle

The base of the seat is attached in front and has a locking system in the rear, which can take a locked position to maintain the seat in place or an unlocked position (4p) to allow it to rotate around its front axis (21). The seat back (1) is rotating around an axis (12) and automatically unlock the base locking system when it reaches the unlocking angle (1d).