The seat has a backrest (1) having a guiding slide in which a guiding portion of a carrier (2) slides. The slide has an opening (231) for passage of straps in a fixed location of the back rest. The carrier has a handle (21) operating between a locked posit...

The seat has an activation unit (2) that acts on a mobile unit (1) so as to move the unit (1) between a release position and a tensioning position for increasing the tension of a seat strap. The activation and mobile units are mounted with respect to each ...

The connecting device has two connecting units (31, 32) moving with respect to each other, between a rest position and a working position when a portion of a belt strap is stretched. A return unit brings back the connecting units to the rest position. A te...