Concealed hinge for a turn-tilt window and tilt-turn window and window equipped therewith

A concealed hinge for a tiltable window with a fixed frame and a leaf, the concealed hinge comprising:

• a scissor mechanism with a main arm, the main arm including
• a first section provided at a first end with a first section hinge configured to fasten the concealed hinge to a top of the leaf, and
• a second section hingeably connected at a second end to a scissor hinge that is configured to hingeably connect the main arm to the fixed frame, the scissor hinge including at least two scissor arms that are hingeable with respect to one another such that the concealed hinge is configured to be folded up to a folded-up position in which the main arm and the scissor arms are disposed above one another and essentially parallel to one another in a horizontal direction,
• in the folded up position of the concealed hinge, the main arm with the second section at the second end thereof is located between two of the at least two scissor arms.